DEPARTMENT OF COMMERCE Office of the Secretary [The following is the text of a notice published in the FEDERAL REGISTER / Vol. 50, No. 123 / Wednesday, June 26, 1985 / Page 26393.] Docket No. 50585-5085 Federal Agency Actions Involving Use of the Metric System in Providing Meteorological Services and Supporting Research AGENCY: Office of the Secretary, Assistant Secretary for Productivity, Technology, and Innovation, Commerce. SUMMARY: This notice is published to inform interested parties and the public of the policy of the Federal agency members of the Interdepartmental Committee on Meteorological Services and Supporting Research (ICMSSR) to implement certain actions involving the use of the metric system in providing meteorological services and supporting research. The actions described in this notice relate only to the policies and procedures of the Federal agencies in the gathering and exchange of weather data for use by Federal agencies themselves. These actions thus are not intended to affect the general public, although they may affect Federal agency procurement of weather systems from the private sector. EFFECTIVE DATE OF ACTIONS: All of the policies mentioned in this notice were adopted at the meeting of the ICMSSR on October 4, 1983. Portions of these policies have been implemented, though no effective date for implementation has been prescribed except for termination of the use of the unit "bar" on December 31, 1985. FOR FURTHER INFORMATION CONTACT: General: For further information about the purpose of the actions accounced in this notice and their relationship to Federal laws and policies concerning the use of the metric system within the United States, contact: Gerald T. Underswood, Director, Office of Metric Programs, U.S. Department of Commerce, Washington, D.C. 20230. Phone: 202-377-0944. Specific: For further information about any particular action announced in this notice, contact G. Stanley Doore, Office of the Federal Coordinator for Meteorological Services and Supporting Research, Suite 300, 11426 Rockville Pike, Rockville, Maryland 20852. Phone: 301-443-8704. Background Through the ICMSSR, which was created by the Office of Management and Budget in 1964 (at that time known as the Bureau of the Budget) under OMB Circular A-62, Federal agencies coordinate their actions relating to meteorological services and supporting research. Thirteen Government agencies engaged in meteorological activities, or needing meteorological services, are represented. These are the Departments of Commerce, Agriculture, Defense, Energy, Interior, State, and Transportation, the Environmental Protection Agency, Federal Emergency Management Agency, National Aeronautics and Space Administration, National Science Foundation, National Transportation Safety Board, and the Nuclear Regulatory Commission. The actions announced in this notice were originally developed by the Working Group on Metric Implementation of the ICMSSR. Acting under the authority of the Secretary of Commerce pursuant to the Metric Conversion Act (Pub. L. 94-168, 89 Stat. 1007; 15 U.S.C. 205), the Assistant Secretary for Productivity, Technology, and Innovation is responsible for the overall coordination of Federal actions to facilitate the orderly transition to the use of the metric system in the United States. Actions General Through the ICMSSR the various Federal agencies have decided to complete the transition of their use of the metric system of measurement as the basic "common demoninator" for meteorological data gathering and internal data exchange. The metric system is defined as the International System of Units as established by the General Conference on Weights and Measures in 1960 and as interpreted or modified for the United States by the Secretary of Commerce. Although the metric system will immediately be regarded as the standard within and among the agencies, no action will be taken that requires unreasonable costs, or costs solely to achieve the transition. Although these policies have been adopted by the agencies, the full implementation will be on an "as soon as practicable" basis. The decisions announced in this notice do not affect reporting of weather data to the media or the general public. Even insofar as the announced policies would require procurement in the future of meteorological equipment capable of readout in metric units, they do not preclude the use of equipment having dual readout capabilities. Also, the policies do not call for procurement of metric capable equipment which is significantly more costly than similiar non- metric capable equipment. Although the kilopascal is being adopted as the basic unit of pressure for data gathering and reporting among Federal agencies, this will not apply to aeronautical operations. For such operations inches of mercury or hectopascals will continue to be used as appropriate. However, for other purposes the agencies have decided to phase out the use of units of pressure other than the kilopascal by December 31, 1985. This decision conforms to the policies of the World Meteorological Organization (WMO) and the International Civil Aviation Organization (ICAO). Actions 1. All Federal Automated Weather Information Systems should use metric units as the common denominator within those systems and for interagency weather data exchange. However, retrofitting existing equipment or modifying existing specifications for new instruments is not required. The standard formats document should include metric units. 2. The Federal Standard Definitions for Weather parameters should be in metric of all weather elements. Non-metric units may be included parenthetically. 3. Standard specifications for future Federal procurement of weather observing equipment should be written to ensure that such equipment provides for recording and readout in metric units and, if required, for recording and readout in non-metric units. 4. The agencies will use the kilopascal for all purposes except aeronautical operations, where inches of mercury or hectopascals may be used, as appropriate. Use of the unit bar will be phased out, and terminated on December 31, 1985. However, retrofitting existing systems or modifying existing specifications for new systems is not required. Dated: June 20, 1985. D. Bruce Merrifield. Assistant Secretary for Productivity, Technology, and Innovation U.S. DEPARTMENT OF COMMERCE NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION NATIONAL WEATHER SERVICE [The text below is that of a draft dated 79-06-25. Although it did not become effective as planned, such a conversion may eventually come as a result of the metric provisions in the Omnibus Trade and Competitiveness Act of 1988, designating the metric system as "the preferred system of weights and measures for United States trade and commerce" (Section 5164). In any case, the federal government since 1985 has converted to the metric system for meteorological data gathering and internal data exchange.] [In the text below, the international standard spelling "metre" and its their compounds have been used.] PROPOSED NATIONAL PLAN TO CONVERT PUBLIC WEATHER REPORTING TO METRIC UNITS The United States, one of the few nations which has not gone metric, is now in the process of doing so. The U.S. Metric Conversion Act of 1975 declared that "the policy of the United States shall be to coordinate and plan the increasing use of the metric system...." The news media, electronic and printed, have begun introducing temperature in metric units. Banks have begun displaying temperatures in degrees Celsius. Even so, the United States is the last major nation, and nearly the only nation, not reporting almost all weather, river and flood information in metric units. The National Oceanic and Atmospheric Administration's National Weather Service will institute an active program toward conversion. It will be assisted in that effort by the American National Metric Council. Wide national participation from all quarters--the media, consumers, edu- cation, industry, government at all levels, and individuals--is necessary to implement the national plan. It is expected that the mass media--radio, television, newspapers, and magazines--will play a key role in going metric, for without complete support of the media, no plan to report weather in exclusively metric can succeed. This plan will be presented to the U.S. Metric Board for its sanction before it is implemented. Other nations have found uniformly that the only effective way to convert weather reporting is through a coordinated, well-understood plan providing firm dates after which only metric units are used. Also, the experience in Canada has shown that the conversion is more effective when the usage of dual units is kept to a minimum time like 6 months. If maintained longer, as was done in the United Kingdom, the conversion is less effective. THE PLAN Should the U.S. Metric Board act favorably toward implementing this plan, the reporting of weather, including river and flood information, eventually will be entirely in metric. After the U.S. Metric Board accepts the plan, a public awareness program will be undertaken by the National Weather Service with the help of the media and other interests for a period of at least 1 year. A comprehensive program will concentrate first on temperature conversion, with other weather elements following at 6 month intervals, if other national metrication activities are proceeding concurrently. Simultaneously, a metric awareness program will be conducted for the employees to improve their familiarity with metric. This will enable our employees to respond more readily to the public. The media, and all other interested parties, will be encouraged to take the initiative in education and use metric as early as possible, remembering that once metric units have been introduced, they should be retained. The National Weather Service uses several types of communication systems to provide weather information to the public -- the NOAA Weather and Media Wire Services, NOAA Weather Radio, and Recorded Weather-by-Phone Systems. These will employ the following schedule. During the period from January through June, temperatures will be provided in both conventional and metric units. From January through March they will be given in order of Fahrenheit first and Celsius second. From April through June they will be given with Celsius first and Fahrenheit second; from July on, in Celsius only. During July-December, precipitation will be given in dual units. From July through September it will be given in the order of inches first, millimetres second. From October through December it will be given with millimetres first and inches second; from January on, in millimetres only. Snowfall and depths will be given in centimetres. In each case new units will be introduced on the first Sunday of the month scheduled, and metric only will be given on the first day of the month scheduled. In some areas, dual units may have to be continued longer should the public want it. The schedule for conversion of other elements depends on other agencies and industry. For example, when the Department of Transportation changes highway signs to show speeds in kilometres per hour, then the wind speeds will be reported in kilometres per hour. When the service stations start using the pressure in kilopascals, then the barometric pressure may be given in kilopascals. From time to time, NOAA's National Weather Service will provide news releases, graphic and other informational materials to assist in the changeover to metric weather reporting. The National Weather Service will work with the NOAA Public Affairs Office to prepare materials to be provided to both the print and broadcast media. NWS field offices will assist to the fullest extent possible in their communities and will give all possible encouragement to the introduction and use of the new system. TABLE I METRIC UNITS OF THE U.S. FEDERAL METEOROLOGICAL INFORMATION SYSTEM Common Metric Equipment Design* Standards for and Recording Parameter Meteorology Resolution Objectives Pressure Surface mbar** 0.1 mbar** Upper Air mbar** 1.0 mbar** Temperature Surface Air & Sea oC 0.1oC River Water oC 0.1oC Soil oC 0.5oC Upper Air oC 0.1oC Cooperative Observers Only oC 0.5oC Dewpoint oC 0.1oC Specific Humidity g/kg N/A (derived) Wind Speed Upper Air Undecided** Undecided** Surface Undecided** Undecided** Wind Direction Surface Degrees 5o Upper Air 1o Evaporation mm 0.2 mm Precipitation Amount mm 0.2 mm Hydrologic Substations Only mm 1.0 mm Snow Depth/Accumulation/Fall cm 1 cm Water Equivalent mm 0.2 mm Ice Accretion mm 1 mm Ice Thickness (Water & Coastal) cm 1 cm Visibility RVR m 10 m Prevailing <5 km km 0.1 km Prevailing >5 km km 1.0 km Heights Upper Air (geopotential) m 1 m Cloud <1500 m 10 m Cloud >1500 m 100 m Shore waves m 0.1 m Waves at sea m 0.5 m River stage & tides m 0.002 m Sunshine duration min 1 min Solar Radiation kJ/m2 1 kJ/m2 Ozone (Dobson) PA.mm 1 Pa.mm Locations (Absolute) Station - Fixed Decimal Degrees 0.0001o Data Locations Decimal Degrees 0.01o Station Elevation m 0.1 m Radar Heights m 100 m Range km 1 km Echo motion Undecided** Undecided** Rainfall Rate mm/h 0.1 mm/h * These are resolution objectives and not accuracy objectives for equipment design. This does not mean that all equipment must meet these objectives. ** The knot and the millibar will continue to be used as now until such time that the international community decides otherwise. [The knot is a unit that may be used with the metric system temporarily time and is to be replaced in the SI metric system by kilometres per hour. The millibar is a unit in use with the SI metric system temporarily and is to be replaced by the kilopascal.] UNITS FOR USE IN PUBLIC WEATHER REPORTING Temperature Related Elements oC - degrees Celsius Speed Related Elements km/h - kilometres per hour Precipitation Related Elements mm - millimetres for liquid (rain) cm - centimetres for solid (snow) mm/h - millimetres per hour for rainfall rate cm/h - centimetres per hour for snowfall rate Pressure kPa - kilopascals Distances km - kilometres Heights m - metres and kilometres Sunshine Duration Percent of maximum possible on a cloud-free day at a given site Direction Degrees or points of compass Location Decimal degrees of latitude and longitude or azimuth and distance Solar Radiation Wh/m2 - watt-hours per square metre PROPOSED METRICATION OF WEATHER REPORTING TO THE PUBLIC Conversion Schedule D-Day M-Day 6 months 12 months ------------------------------------- | | | | Temperature |............|----------|===========|=================> | 12 months | | | Precipitation |............|..........|-----------|=================> | | | | Windspeed |............|..........|...........|...../---========> | | | | Distance, Pressure & |............|..........|...........|........./---====> All Other Elements | | | | .......... Public Awareness Program ---------- Dual Units and Intensive Education Program * ========== Metric Units Only D-Day - Decision Day is the January 1 when Public Awareness Program starts. M-Day - Metrication Day is the day on which U.S. National Weather Service will start to issue weather information in metric units. * In some areas, dual units may have to be continued for a longer period. THINK METRIC TEMPERATURE oF oC Fahrenheit || Celsius ||- +50 Very Hot || || ||- +40 Body 98.6 ||- ---- 37 ---------------- || Temperature ||- +30 || || 68 ||- +20 Room || Temperature || ||- +10 || || 32 ||- 0 ---------------- Freezing Point || || ||- -10 || || ||- -20 Bitter Cold || || ||- -30 Extreme Cold || || -40 ||- -40 || || ||- 50 CELSIUS TO FAHRENHEIT CONVERSION TABLE C F C F C F C F C F 102 215.6 67 152.6 32 89.6 - 3 26.6 -38 -36.4 101 213.8 66 150.8 31 87.8 4 24.8 39 38.2 100 212.0 65 149.0 30 86.0 5 23.0 40 40.0 99 210.2 64 147.2 29 84.2 6 21.2 41 41.8 98 208.4 63 145.4 28 82.4 7 19.4 42 43.6 97 206.6 62 143.6 27 80.6 - 8 17.6 -43 -45.4 96 204.8 61 141.8 26 78.8 9 15.8 44 47.2 95 203.0 60 140.0 25 77.0 10 14.0 45 49.0 94 201.2 59 138.2 24 75.2 11 12.2 46 50.8 93 199.4 58 136.4 23 73.4 12 10.4 47 52.6 92 197.6 57 134.6 22 71.6 -13 8.6 -48 -54.4 91 195.8 56 132.8 21 69.8 14 6.8 49 56.2 90 194.0 55 131.0 20 68.0 15 5.0 50 58.0 89 192.2 54 129.2 19 66.2 16 3.2 51 59.8 88 190.4 53 127.4 18 64.4 17 + 1.4 52 61.6 87 188.6 52 125.6 17 62.6 -18 - 0.4 -53 -63.4 86 186.8 51 123.8 16 60.8 19 2.2 54 65.2 85 185.0 50 122.0 15 59.0 20 4.0 55 67.0 84 183.2 49 120.2 14 57.2 21 5.8 56 68.8 83 181.4 48 118.4 13 55.4 22 7.6 57 70.6 82 179.6 47 116.6 12 53.6 -23 - 9.4 -58 -72.4 81 177.8 46 114.8 11 51.8 24 11.2 59 74.2 80 176.0 45 113.0 10 50.0 25 13.0 60 76.0 79 174.2 44 111.2 9 48.2 26 14.8 61 77.8 78 172.4 43 109.4 8 46.4 27 16.6 62 79.6 77 170.6 42 107.6 7 44.6 -28 -18.4 -63 -81.4 76 168.8 41 105.8 6 42.8 29 20.2 64 83.2 75 167.0 40 104.0 5 41.0 30 22.0 65 85.0 74 165.2 39 102.2 4 39.2 31 23.8 66 86.8 73 163.4 38 100.4 3 37.4 32 25.6 67 88.6 72 161.6 37 98.6 + 2 35.6 -33 -27.4 -68 -90.4 71 159.8 36 96.8 + 1 33.8 34 29.2 69 92.2 70 158.0 35 95.0 0 32.0 35 31.0 70 94.0 69 156.2 34 93.2 - 1 30.2 36 32.8 71 95.8 68 154.4 33 91.4 - 2 28.4 37 34.6 72 97.6 THINK METRIC RAINFALL RATE mm/h Inches Millimetres per Hour per hour || Extreme ||- 100 || Intense ||- 50 || Very Heavy 1.00 -||- 25 || Heavy ||- 10 || || Moderate || ||- 2.0 || || Light || ||- 0.5 || Drizzle ||- 0 METRES TO FEET 1 metre = 3.2808399 feet Metres 0 10 20 30 40 ----------------------------------------- | ft. ft. ft. ft. ft. | 0 | 00.0 32.8 65.6 98.4 131.2 100 | 328.1 360.9 393.7 426.5 459.3 200 | 656.2 689.0 721.8 754.6 787.4 300 | 984.3 1017.1 1049.9 1082.7 1115.5 400 | 1312.3 1345.1 1378.0 1410.8 1443.6 | 0.5 km 500 | 1640.4 1673.2 1706.0 1738.8 1771.7 600 | 1968.5 2001.3 2034.1 2066.9 2099.7 700 | 2296.6 2329.4 2362.2 2395.0 2427.8 800 | 2624.7 2657.5 2690.3 2723.1 2755.9 900 | 2952.8 2985.6 3018.4 3051.2 3084.0 | 1 km 1000 | 3280.8 3313.6 3346.5 3379.3 3412.1 1100 | 3608.9 3641.7 3674.5 3707.3 3740.2 1200 | 3937.0 3969.8 4002.6 4035.4 4068.2 1300 | 4265.1 4297.9 4330.7 4363.5 4396.3 1400 | 4593.2 4626.0 4658.8 4691.6 4724.4 1500 | 4921.3 4954.1 4986.9 5019.7 5052.5 | 1600 | 5249.3 5282.2 5315.0 5347.8 5380.6 1700 | 5577.4 5610.2 5643.0 5675.9 5708.7 1800 | 5905.5 5938.3 5971.1 6003.9 6036.7 1900 | 6233.6 6266.4 6299.2 6332.0 6364.8 | 2 km 2000 | 6561.7 6594.5 6627.3 6660.1 6692.9 2100 | 6889.8 6922.6 6955.4 6988.2 7021.0 2200 | 7217.8 7250.7 7283.5 7316.3 7349.1 2300 | 7545.9 7578.7 7611.5 7644.4 7677.2 2400 | 7874.0 7906.8 7939.6 7972.4 8005.2 | 2500 | 8202.1 8234.9 8267.7 8300.5 8333.3 2600 | 8530.2 8563.0 8595.8 8628.6 8661.4 2700 | 8858.3 8891.1 8923.9 8956.7 8989.5 2800 | 9186.4 9219.2 9252.0 9284.8 9317.6 2900 | 9514.4 9547.2 9580.1 9612.9 9645.7 | 3 km 3000 | 9842.5 9875.3 9908.1 9940.9 9973.8 3100 | 10170.6 10203.4 10236.2 10269.0 10301.8 3200 | 10498.7 10531.5 10564.3 10597.1 10629.9 3300 | 10826.8 10859.6 10892.4 10925.2 10958.0 3400 | 11154.9 11187.7 11220.5 11253.3 11286.1 | 3500 | 11482.9 11515.7 11548.6 11581.4 11614.2 3600 | 11811.0 11843.8 11876.6 11909.4 11942.3 3700 | 12139.1 12171.9 12204.7 12237.5 12270.3 3800 | 12467.2 12500.0 12532.8 12565.6 12598.4 3900 | 12795.3 12828.1 12860.9 12893.7 12926.5 | 4 km 4000 | 13123.4 13156.2 13189.0 13221.8 13254.6 4100 | 13451.4 13484.3 13517.1 13549.9 13582.7 4200 | 13779.5 13812.3 13845.1 13878.0 13910.8 4300 | 14107.6 14140.4 14173.2 14206.0 14238.8 4400 | 14435.7 14468.5 14501.3 14534.1 14566.9 | 4500 | 14763.8 14796.6 14829.4 14862.2 14895.0 4600 | 15091.9 15124.7 15157.5 15190.3 15223.1 4700 | 15419.9 15452.8 15485.6 15518.4 15551.2 4800 | 15748.0 15780.8 15813.6 15846.5 15879.3 4900 | 16076.1 16108.9 16141.7 16174.5 16207.3 | 5 km 5000 | 16404.2 16437.0 16469.8 16502.6 16535.4 Metres 50 60 70 80 90 ----------------------------------------- | ft. ft. ft. ft. ft. | 0 | 164.0 196.9 229.7 262.5 295.3 100 | 492.1 524.9 557.7 590.6 623.4 200 | 820.2 853.0 885.8 918.6 951.4 300 | 1148.3 1181.1 1213.9 1246.7 1279.5 400 | 1476.4 1509.2 1542.0 1574.8 1607.6 | 0.5 km 500 | 1804.5 1837.3 1870.1 1902.9 1935.7 600 | 2132.5 2165.4 2198.2 2231.0 2263.8 700 | 2460.6 2493.4 2526.2 2559.1 2591.9 800 | 2788.7 2821.5 2854.3 2887.1 2919.9 900 | 3116.8 3149.6 3182.4 3215.2 3248.0 | 1 km 1000 | 3444.9 3477.7 3510.5 3543.3 3576.1 1100 | 3773.0 3805.8 3838.6 3871.4 3904.2 1200 | 4101.0 4133.9 4166.7 4199.5 4232.3 1300 | 4429.1 4461.9 4494.8 4527.6 4560.4 1400 | 4757.2 4790.0 4822.8 4855.6 4888.5 | 1500 | 5085.3 5118.1 5150.9 5183.7 5216.5 1600 | 5413.4 5446.2 5479.0 5511.8 5544.6 1700 | 5741.5 5774.3 5807.1 5839.9 5872.7 1800 | 6069.6 6102.4 6135.2 6168.0 6200.8 1900 | 6397.6 6430.4 6463.3 6496.1 6528.9 | 2 km 2000 | 6725.7 6758.5 6791.3 6824.1 6857.0 2100 | 7053.8 7086.6 7119.4 7152.2 7185.0 2200 | 7381.9 7414.7 7447.5 7480.3 7513.1 2300 | 7710.0 7742.8 7775.6 7808.4 7841.2 2400 | 8038.1 8070.9 8103.7 8136.5 8169.3 | 2500 | 8366.1 8399.0 8431.8 8464.6 8497.4 2600 | 8694.2 8727.0 8759.8 8792.7 8825.5 2700 | 9022.3 9055.1 9087.9 9120.7 9153.5 2800 | 9350.4 9383.2 9416.0 9448.8 9481.6 2900 | 9678.5 9711.3 9744.1 9776.9 9809.7 | 3 km 3000 | 10006.6 10039.4 10072.2 10105.0 10137.8 3100 | 10334.6 10367.5 10400.3 10433.1 10465.9 3200 | 10662.7 10695.5 10728.3 10761.2 10794.0 3300 | 10990.8 11023.6 11056.4 11089.2 11122.0 3400 | 11318.9 11351.7 11384.5 11417.3 11450.1 | 3500 | 11647.0 11679.8 11712.6 11745.4 11778.2 3600 | 11975.1 12007.9 12040.7 12073.5 12106.3 3700 | 12303.2 12336.0 12368.8 12401.6 12434.4 3800 | 12631.2 12664.0 12696.9 12729.7 12762.5 3900 | 12959.3 12992.1 13024.9 13057.7 13090.6 | 4 km 4000 | 13287.4 13320.2 13353.0 13385.8 13418.6 4100 | 13615.5 13648.3 13681.1 13713.9 13746.7 4200 | 13943.6 13976.4 14009.2 14042.0 14074.8 4300 | 14271.7 14304.5 14337.3 14370.1 14402.9 4400 | 14599.7 14632.5 14665.4 14698.2 14731.0 | 4500 | 14927.8 14960.6 14993.4 15026.2 15059.1 4600 | 15255.9 15288.7 15321.5 15354.3 15387.1 4700 | 15584.0 15616.8 15649.6 15682.4 15715.2 4800 | 15912.1 15944.9 15977.7 16010.5 16043.3 4900 | 16240.2 16273.0 16305.8 16338.6 16371.4 | 5 km 5000 | 16568.2 16601.1 16633.9 16666.7 16699.5 Proportional m 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 parts ft. 3.3 6.6 9.8 13.1 16.4 19.7 23.0 26.2 29.5 Ex. 40 m = 131.2 ft. 140 m = 459.3 ft. 141 m = 459.3 + 3.3 = 462.6 ft. THINK METRIC SNOWFALL Rate Visibility || cm/h 0 -|| Inches || Centimetres || per Hour || per Hour || || || || Heavy || || || ||- 3 0.5 km -|| || || 1 -|| Moderate ||- 1/2 Mile || || ||-2 2 km -|| || || || Light || || || ||- -|| || || || || || || || || Heavy Snow Warnings are Issued When: o 10 cm or more in 12 hours is expected. o 15 cm or more in 24 hours is expected. MILLIMETRES TO INCHES 1 millimetre = 0.039370079 inches mm 0 1 2 3 4 5 6 7 8 9 ---------------------------------------------------------------------- | in. in. in. in. in. in. in. in. in. in. 0 | 0.00 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.35 10 | 0.39 0.43 0.47 0.51 0.55 0.59 0.63 0.67 0.71 0.75 20 | 0.79 0.83 0.87 0.91 0.94 0.98 1.02 1.06 1.10 1.14 30 | 1.18 1.22 1.26 1.30 1.34 1.38 1.42 1.46 1.50 1.54 40 | 1.57 1.61 1.65 1.69 1.73 1.77 1.81 1.85 1.89 1.93 50 | 1.97 2.01 2.05 2.09 2.13 2.17 2.20 2.24 2.28 2.32 60 | 2.36 2.40 2.44 2.48 2.52 2.56 2.60 2.64 2.68 2.72 70 | 2.76 2.80 2.83 2.87 2.91 2.95 2.99 3.03 3.07 3.11 80 | 3.15 3.19 3.23 3.27 3.31 3.35 3.39 3.43 3.46 3.50 90 | 3.54 3.58 3.62 3.66 3.70 3.74 3.78 3.82 3.86 3.90 | 100 | 3.94 3.98 4.02 4.06 4.09 4.13 4.17 4.21 4.25 4.29 110 | 4.33 4.37 4.41 4.45 4.49 4.53 4.57 4.61 4.65 4.69 120 | 4.72 4.76 4.80 4.84 4.88 4.92 4.96 5.00 5.04 5.08 130 | 5.12 5.16 5.20 5.24 5.28 5.31 5.35 5.39 5.43 5.47 140 | 5.51 5.55 5.59 5.63 5.67 5.71 5.75 5.79 5.83 5.87 | 150 | 5.91 5.94 5.98 6.02 6.06 6.10 6.14 6.18 6.22 6.26 160 | 6.30 6.34 6.38 6.42 6.46 6.50 6.54 6.57 6.61 6.65 170 | 6.69 6.73 6.77 6.81 6.85 6.89 6.93 6.97 7.01 7.05 180 | 7.09 7.13 7.17 7.20 7.24 7.28 7.32 7.36 7.40 7.44 190 | 7.48 7.52 7.56 7.60 7.64 7.68 7.72 7.76 7.80 7.83 | 200 | 7.87 7.91 7.95 7.99 8.03 8.07 8.11 8.15 8.19 8.23 210 | 8.27 8.31 8.35 8.39 8.43 8.46 8.50 8.54 8.58 8.62 220 | 8.66 8.70 8.74 8.78 8.82 8.86 8.90 8.94 8.98 9.02 230 | 9.06 9.09 9.13 9.17 9.21 9.25 9.29 9.33 9.37 9.41 240 | 9.45 9.49 9.53 9.57 9.61 9.65 9.69 9.72 9.76 9.80 | 250 | 9.84 9.88 9.92 9.96 10.00 10.04 10.08 10.12 10.16 10.20 260 | 10.24 10.28 10.31 10.35 10.39 10.43 10.47 10.51 10.55 10.59 270 | 10.63 10.67 10.71 10.75 10.79 10.83 10.87 10.91 10.94 10.98 280 | 11.02 11.06 11.10 11.14 11.18 11.22 11.26 11.30 11.34 11.38 290 | 11.42 11.46 11.50 11.54 11.57 11.61 11.65 11.69 11.73 11.77 | 300 | 11.81 11.85 11.89 11.93 11.97 12.01 12.05 12.09 12.13 12.17 310 | 12.20 12.24 12.28 12.32 12.36 12.40 12.44 12.48 12.52 12.56 320 | 12.60 12.64 12.68 12.72 12.76 12.80 12.83 12.87 12.91 12.95 330 | 12.99 13.03 13.07 13.11 13.15 13.19 13.23 13.27 13.31 13.35 340 | 13.39 13.43 13.46 13.50 13.54 13.58 13.62 13.66 13.70 13.74 | 350 | 13.78 13.82 13.86 13.90 13.94 13.98 14.02 14.06 14.09 14.13 360 | 14.17 14.21 14.25 14.29 14.33 14.37 14.41 14.45 14.49 14.53 370 | 14.57 14.61 14.65 14.69 14.72 14.76 14.80 14.84 14.88 14.92 380 | 14.96 15.00 15.04 15.08 15.12 15.16 15.20 15.24 15.28 15.31 390 | 15.35 15.39 15.43 15.47 15.51 15.55 15.59 15.63 15.67 15.71 | 400 | 15.75 15.79 15.83 15.87 15.91 15.94 15.98 16.02 16.06 16.10 410 | 16.14 16.18 16.22 16.26 16.30 16.34 16.38 16.42 16.46 16.50 420 | 16.54 16.57 16.61 16.65 16.69 16.73 16.77 16.81 16.85 16.89 430 | 16.93 16.97 17.01 17.05 17.09 17.13 17.17 17.20 17.24 17.28 440 | 17.32 17.36 17.40 17.44 17.48 17.52 17.56 17.60 17.64 17.68 THINK METRIC WIND SPEEDS km/h Miles Kilometres per Hour per hour || ||- 120 Hurricane Hurricane 74 -|| ---------------------- || Threshold || || Violent Storm || -||- 105 || || || Storm || || ||- 90 Storm Warning 55 -|| ---------------------- || Threshold || || Strong Gale || ||- 75 || || || Gale || Gale & || Tropical Storm 39 -||- 60 ------------------- || Threshold || Near Gale || ||- 50 || || Strong Winds || ||- 40 || || || ||- 30 Windy || || || ||- 20 || || Gentle Breeze || ||- 10 || ||- 5 || ||- 0 Calm KILOMETRES PER HOUR TO: KNOTS, MILES PER HOUR, METRES PER SECOND, FEET PER SECOND ------------------------------------------------------------------------------- km/h | knots mi/h m/s ft/s km/h | knots mi/h m/s ft/s | | 1 | 0.5 0.6 0.3 0.9 56 | 30.2 34.8 15.6 51.0 2 | 1.1 1.2 0.6 1.8 57 | 30.8 35.4 15.8 51.9 3 | 1.6 1.9 0.8 2.7 58 | 31.3 36.0 16.1 52.9 4 | 2.2 2.5 1.1 3.6 59 | 31.9 36.7 16.4 53.8 5 | 2.7 3.1 1.4 4.6 60 | 32.4 37.3 16.7 54.7 6 | 3.2 3.7 1.7 5.5 61 | 32.9 37.9 16.9 55.6 7 | 3.8 4.3 1.9 6.4 62 | 33.5 38.5 17.2 56.5 8 | 4.3 5.0 2.2 7.3 63 | 34.0 39.1 17.5 57.4 9 | 4.9 5.6 2.5 8.2 64 | 34.6 39.8 17.8 58.3 10 | 5.4 6.2 2.8 9.1 65 | 35.1 40.4 18.1 59.2 11 | 5.9 6.8 3.1 10.0 66 | 35.6 41.0 18.3 60.1 12 | 6.5 7.5 3.3 10.9 67 | 36.2 41.6 18.6 61.1 13 | 7.0 8.1 3.6 11.8 68 | 36.7 42.3 18.9 62.0 14 | 7.6 8.7 3.9 12.8 69 | 37.3 42.9 19.2 62.9 15 | 8.1 9.3 4.2 13.7 70 | 37.8 43.5 19.4 63.8 16 | 8.6 9.9 4.4 14.6 71 | 38.3 44.1 19.7 64.7 17 | 9.2 10.6 4.7 15.5 72 | 38.9 44.7 20.0 65.6 18 | 9.7 11.2 5.0 16.4 73 | 39.4 45.4 20.3 66.5 19 | 10.3 11.8 5.3 17.3 74 | 40.0 46.0 20.6 67.4 20 | 10.8 12.4 5.6 18.2 75 | 40.5 46.6 20.8 68.4 21 | 11.3 13.0 5.8 19.1 76 | 41.0 47.2 21.1 69.3 22 | 11.9 13.7 6.1 20.0 77 | 41.6 47.8 21.4 70.2 23 | 12.4 14.3 6.4 21.0 78 | 42.1 48.5 21.7 71.1 24 | 13.0 14.9 6.7 21.9 79 | 42.7 49.1 21.9 72.0 25 | 13.5 15.5 6.9 22.8 80 | 43.2 49.7 22.2 72.9 26 | 14.0 16.2 7.2 23.7 81 | 43.7 50.3 22.5 73.8 27 | 14.6 16.8 7.5 24.6 82 | 44.3 51.0 22.8 74.7 28 | 15.1 17.4 7.8 25.5 83 | 44.8 51.6 23.1 75.6 29 | 15.7 18.0 8.1 26.4 84 | 45.4 52.2 23.3 76.6 30 | 16.2 18.6 8.3 27.3 85 | 45.9 52.8 23.6 77.5 31 | 16.7 19.3 8.6 28.3 86 | 46.4 53.4 23.9 78.4 32 | 17.3 19.9 8.9 29.2 87 | 47.0 54.1 24.2 79.3 33 | 17.8 20.5 9.2 30.1 88 | 47.5 54.7 24.4 80.2 34 | 18.4 21.1 9.4 31.0 89 | 48.1 55.3 24.7 81.1 35 | 18.9 21.7 9.7 31.9 90 | 48.6 55.9 25.0 82.0 36 | 19.4 22.4 10.0 32.8 91 | 49.1 56.5 25.3 82.9 37 | 20.0 23.0 10.3 33.7 92 | 49.7 57.2 25.6 83.8 38 | 20.5 23.6 10.6 34.6 93 | 50.2 57.8 25.8 84.8 39 | 21.1 24.2 10.8 35.5 94 | 50.8 58.4 26.1 85.7 40 | 21.6 24.9 11.1 36.5 95 | 51.3 59.0 26.4 86.6 41 | 22.1 25.5 11.4 37.4 96 | 51.8 59.7 26.7 87.5 42 | 22.7 26.1 11.7 38.3 97 | 52.4 60.3 26.9 88.4 43 | 23.2 26.7 11.9 39.2 98 | 52.9 60.9 27.2 89.3 44 | 23.8 27.3 12.2 40.1 99 | 53.5 61.5 27.5 90.2 45 | 24.3 28.0 12.5 41.0 100| 54.0 62.1 27.8 91.1 46 | 24.8 28.6 12.8 41.9 101| 54.5 62.8 28.1 92.0 47 | 25.4 29.2 13.1 42.8 102| 55.1 63.4 28.3 93.0 48 | 25.9 29.8 13.3 43.7 103| 55.6 64.0 28.6 93.9 49 | 26.5 30.4 13.6 44.7 104| 56.2 64.6 28.9 94.8 50 | 27.0 31.1 13.9 45.6 105| 56.7 65.2 29.2 95.7 51 | 27.5 31.7 14.2 46.5 106| 57.2 65.9 29.4 96.6 52 | 28.1 32.3 14.4 47.4 107| 57.8 66.5 29.7 97.5 53 | 28.6 32.9 14.7 48.3 108| 58.3 67.1 30.0 98.4 54 | 29.2 33.6 15.0 49.2 109| 58.9 67.7 30.3 99.3 55 | 29.7 34.2 15.3 50.1 110| 59.4 68.4 30.6 100.2 ------------------------------------------------------------------------------- km/h | knots mi/h m/s ft/s km/h | knots mi/h m/s ft/s | | 111 | 59.9 69.0 30.8 101.2 166 | 89.6 103.1 46.1 151.3 112 | 60.5 69.6 31.1 102.1 167 | 90.2 103.8 46.4 152.2 113 | 61.0 70.2 31.4 103.0 168 | 90.7 104.4 46.7 153.1 114 | 61.6 70.8 31.7 103.9 169 | 91.3 105.0 46.9 154.0 115 | 62.1 71.5 31.9 104.8 170 | 91.8 105.6 47.2 154.9 116 | 62.6 72.1 32.2 105.7 171 | 92.3 106.3 47.5 155.8 117 | 63.2 72.7 32.5 106.6 172 | 92.9 106.9 47.8 156.8 118 | 63.7 73.3 32.8 107.5 173 | 93.4 107.5 48.1 157.7 119 | 64.3 73.9 33.1 108.4 174 | 94.0 108.1 48.3 158.6 120 | 64.8 74.6 33.3 109.4 175 | 94.5 108.7 48.6 159.5 121 | 65.3 75.2 33.6 110.3 176 | 95.0 109.4 48.9 160.4 122 | 65.9 75.8 33.9 111.2 177 | 95.6 110.0 49.2 161.3 123 | 66.4 76.4 34.2 112.1 178 | 96.1 110.6 49.4 162.2 124 | 67.0 77.1 34.4 113.0 179 | 96.7 111.2 49.7 163.1 125 | 67.5 77.7 34.7 113.9 180 | 97.2 111.8 50.0 164.0 126 | 68.0 78.3 35.0 114.8 181 | 97.7 112.5 50.3 165.0 127 | 68.6 78.9 35.3 115.7 182 | 98.3 113.1 50.6 165.9 128 | 69.1 79.5 35.6 116.7 183 | 98.8 113.7 50.8 166.8 129 | 69.7 80.2 35.8 117.6 184 | 99.4 114.3 51.1 167.7 130 | 70.2 80.8 36.1 118.3 185 | 99.9 115.0 51.4 168.6 131 | 70.7 81.4 36.4 119.4 186 | 100.4 115.6 51.7 169.5 132 | 71.3 82.0 36.7 120.3 187 | 101.0 116.2 51.9 170.4 133 | 71.8 82.6 36.9 121.2 188 | 101.5 116.8 52.2 171.3 134 | 72.4 83.3 37.2 122.1 189 | 102.1 117.4 52.5 172.2 135 | 72.9 83.9 37.5 123.0 190 | 102.6 118.1 52.8 173.2 136 | 73.4 84.5 37.8 123.9 191 | 103.1 118.7 53.1 174.1 137 | 74.0 85.1 38.1 124.9 192 | 103.7 119.3 53.3 175.0 138 | 74.5 85.7 38.3 125.8 193 | 104.2 119.9 53.6 175.9 139 | 75.1 86.4 38.6 126.7 194 | 104.8 120.5 53.9 176.8 140 | 75.6 87.0 38.9 127.6 195 | 105.3 121.2 54.2 177.7 141 | 76.1 87.6 39.2 128.5 196 | 105.8 121.8 54.4 178.6 142 | 76.7 88.2 39.4 129.4 197 | 106.4 122.4 54.7 179.5 143 | 77.2 88.9 39.7 130.3 198 | 106.9 123.0 55.0 180.4 144 | 77.8 89.5 40.0 131.2 199 | 107.5 123.7 55.3 181.4 145 | 78.3 90.1 40.3 132.1 200 | 108.0 124.3 55.6 182.3 146 | 78.8 90.7 40.6 133.1 210 | 113.4 130.5 58.3 191.4 147 | 79.4 91.3 40.8 134.0 220 | 118.8 136.7 61.1 200.5 148 | 79.9 92.0 41.1 134.9 230 | 124.2 142.9 63.9 209.6 149 | 80.5 92.6 41.4 135.8 240 | 129.6 149.1 66.7 218.7 150 | 81.0 93.2 41.7 136.7 250 | 135.0 155.3 69.4 227.8 151 | 81.5 93.8 41.9 137.6 260 | 140.4 161.6 72.2 236.9 152 | 82.1 94.4 42.2 138.5 270 | 145.8 167.8 75.0 246.1 153 | 82.6 95.1 42.5 139.4 280 | 151.2 174.0 77.8 255.2 154 | 83.2 95.7 42.8 140.3 290 | 156.6 180.2 80.6 264.3 155 | 83.7 96.3 43.1 141.3 300 | 162.0 186.4 83.3 273.4 156 | 84.2 96.9 43.3 142.2 310 | 167.4 192.6 86.1 282.5 157 | 84.8 97.6 43.6 143.1 320 | 172.8 198.8 88.9 291.6 158 | 85.3 98.2 43.9 144.0 330 | 178.2 205.1 91.7 300.7 159 | 85.9 98.8 44.2 144.9 340 | 183.6 211.3 94.4 309.9 160 | 86.4 99.4 44.4 145.8 350 | 189.0 217.5 97.2 319.0 161 | 86.9 100.0 44.7 146.7 360 | 194.4 223.7 100.0 328.1 162 | 87.5 100.7 45.0 147.6 370 | 199.8 229.9 102.8 337.2 163 | 88.0 101.3 45.3 148.5 380 | 205.2 236.1 105.6 346.3 164 | 88.6 101.9 45.6 149.5 390 | 210.6 242.4 108.3 355.4 165 | 89.1 102.5 45.8 150.4 400 | 216.0 248.5 111.1 364.5 THINK METRIC PRESSURE Inches kPa of Mercury Kilopascals 31.00 -||- 105 || ||- 104 || ||- 103 || ||- 102 Normal Sea Level 29.92 -||- ---------------------------------------------- 101.32 Inches Hg ||- 101 Pressure || ||- 100 || ||- 99 29.00 -|| ||- 98 || ||- 97 Unusually Low || ||- 96 || ||- 95 KILOPASCALS TO INCHES OF MERCURY 0.10 kilopascal = 0.02952998 inches of mercury .00 .01 .02 .03 .04 .05 .06 .07 .08 .09 kPa ------------------------------------------------------------------------- | in. Hg in. Hg in. Hg in. Hg in. Hg in. Hg in. Hg in. Hg in. Hg .in Hg | 95.0 | 28.053 28.056 28.059 28.062 28.065 28.068 28.071 28.074 28.077 28.080 95.1 | 28.083 28.086 28.089 28.092 28.095 28.098 28.101 28.104 28.107 28.110 95.2 | 28.113 28.115 28.118 28.121 28.124 28.127 28.130 28.133 28.136 28.139 95.3 | 28.142 28.145 28.148 28.151 28.154 28.157 28.160 28.163 28.166 28.169 95.4 | 28.172 28.175 28.178 28.180 28.183 28.186 28.189 28.192 28.195 28.198 | 95.5 | 28.201 28.204 28.207 28.210 28.213 28.216 28.219 28.222 28.225 28.228 95.6 | 28.231 28.234 28.237 28.240 28.242 28.245 28.248 28.251 28.254 28.257 95.7 | 28.260 28.263 28.266 28.269 28.272 28.275 28.278 28.281 28.284 28.287 95.8 | 28.290 28.293 28.296 28.299 28.302 28.304 28.307 28.310 28.313 28.316 95.9 | 28.319 28.322 28.325 28.328 28.331 28.334 28.337 28.340 28.343 28.346 | 96.0 | 28.349 28.352 28.355 28.358 28.361 28.364 28.366 28.369 28.372 28.375 96.1 | 28.378 28.381 28.384 28.387 28.390 28.393 28.396 28.399 28.402 28.405 96.2 | 28.408 28.411 28.414 28.417 28.420 28.423 28.426 28.429 28.431 28.434 96.3 | 28.437 28.440 28.443 28.446 28.449 28.452 28.455 28.458 28.461 28.464 96.4 | 28.467 28.470 28.473 28.476 28.479 28.482 28.485 28.488 28.491 28.493 | 96.5 | 28.496 28.499 28.502 28.505 28.508 28.511 28.514 28.517 28.520 28.523 96.6 | 28.526 28.529 28.532 28.535 28.538 28.541 28.544 28.547 28.550 28.553 96.7 | 28.555 28.558 28.561 28.564 28.567 28.570 28.573 28.576 28.579 28.582 96.8 | 28.585 28.588 28.591 28.594 28.597 28.600 28.603 28.606 28.609 28.612 96.9 | 28.615 28.617 28.620 28.623 28.626 28.629 28.632 28.635 28.638 28.641 | 97.0 | 28.644 28.647 28.650 28.653 28.656 28.659 28.662 28.665 28.668 28.671 97.1 | 28.674 28.677 28.680 28.682 28.685 28.688 28.691 28.694 28.697 28.700 97.2 | 28.703 28.706 28.709 28.712 28.715 28.718 28.721 28.724 28.727 28.730 97.3 | 28.733 28.736 28.739 28.742 28.744 28.747 28.750 28.753 28.756 28.759 97.4 | 28.762 28.765 28.768 28.771 28.774 28.777 28.780 28.783 28.786 28.789 | 97.5 | 28.792 28.795 28.798 28.801 28.804 28.806 28.809 28.812 28.815 28.818 97.6 | 28.821 28.824 28.827 28.830 28.833 28.836 28.839 28.842 28.845 28.848 97.7 | 28.851 28.854 28.857 28.860 28.863 28.866 28.868 28.871 28.874 28.877 97.8 | 28.880 28.883 28.886 28.889 28.892 28.895 28.898 28.901 28.904 28.907 97.9 | 28.910 28.913 28.916 28.919 28.922 28.925 28.928 28.931 28.933 28.936 | 98.0 | 28.939 28.942 28.945 28.948 28.951 28.954 28.957 28.960 28.963 28.966 98.1 | 28.969 28.972 28.975 28.978 28.981 28.984 28.987 28.990 28.993 28.995 98.2 | 28.998 29.001 29.004 29.007 29.010 29.013 29.016 29.019 29.022 29.025 98.3 | 29.028 29.031 29.034 29.037 29.040 29.043 29.046 29.049 29.052 29.055 98.4 | 29.057 29.060 29.063 29.066 29.069 29.072 29.075 29.078 29.081 29.084 | 98.5 | 29.087 29.090 29.093 29.096 29.099 29.102 29.105 29.108 29.111 29.114 98.6 | 29.117 29.119 29.122 29.125 29.128 29.131 29.134 29.137 29.140 29.143 98.7 | 29.146 29.149 29.152 29.155 29.158 29.161 29.164 29.167 29.170 29.173 98.8 | 29.176 29.179 29.182 29.184 29.187 29.190 29.193 29.196 29.199 29.202 98.9 | 29.205 29.208 29.211 29.214 29.217 29.220 29.223 29.226 29.229 29.232 | 99.0 | 29.235 29.238 29.241 29.244 29.246 29.249 29.252 29.255 29.258 29.261 99.1 | 29.264 29.267 29.270 29.273 29.276 29.279 29.282 29.285 29.288 29.291 99.2 | 29.294 29.297 29.300 29.303 29.306 29.308 29.311 29.314 29.317 29.320 99.3 | 29.323 29.326 29.329 29.332 29.335 29.338 29.341 29.344 29.347 29.350 99.4 | 29.353 29.356 29.359 29.362 29.365 29.368 29.370 29.373 29.376 29.379 | 99.5 | 29.382 29.385 29.388 29.391 29.394 29.397 29.400 29.403 29.406 29.409 99.6 | 29.412 29.415 29.418 29.421 29.424 29.427 29.430 29.433 29.435 29.438 99.7 | 29.441 29.444 29.447 29.450 29.453 29.456 29.459 29.462 29.465 29.468 99.8 | 29.471 29.474 29.477 29.480 29.483 29.486 29.489 29.492 29.495 29.497 99.9 | 29.500 29.503 29.506 29.509 29.512 29.515 29.518 29.521 29.524 29.527 | 100.0 | 29.530 29.533 29.536 29.539 29.542 29.545 29.548 29.551 29.554 29.557 100.1 | 29.559 29.562 29.565 29.568 29.571 29.574 29.577 29.580 29.583 29.586 100.2 | 29.589 29.592 29.595 29.598 29.601 29.604 29.607 29.610 29.613 29.616 100.3 | 29.619 29.622 29.624 29.627 29.630 29.633 29.636 29.639 29.642 29.645 100.4 | 29.648 29.651 29.654 29.657 29.660 29.663 29.666 29.669 29.672 29.675 | 100.5 | 29.678 29.681 29.684 29.686 29.689 29.692 29.695 29.698 29.701 29.704 100.6 | 29.707 29.710 29.713 29.716 29.719 29.722 29.725 29.728 29.731 29.734 100.7 | 29.737 29.740 29.743 29.746 29.748 29.751 29.754 29.757 29.760 29.763 100.8 | 29.766 29.769 29.772 29.775 29.778 29.781 29.784 29.787 29.790 29.793 100.9 | 29.796 29.799 29.802 29.805 29.808 29.810 29.813 29.816 29.819 29.822 | 101.0 | 29.825 29.828 29.831 29.834 29.837 29.840 29.843 29.846 29.849 29.852 101.1 | 29.855 29.858 29.861 29.864 29.867 29.870 29.873 29.875 29.878 29.881 101.2 | 29.884 29.887 29.890 29.893 29.896 29.899 29.902 29.905 29.908 29.911 101.3 | 29.914 29.917 29.920 29.923 29.926 29.929 29.932 29.935 29.937 29.940 101.4 | 29.943 29.946 29.949 29.952 29.955 29.958 29.961 29.964 29.967 29.970 | 101.5 | 29.973 29.976 29.979 29.982 29.985 29.988 29.991 29.994 29.997 29.999 101.6 | 30.002 30.005 30.008 30.011 30.014 30.017 30.020 30.023 30.026 30.029 101.7 | 30.032 30.035 30.038 30.041 30.044 30.047 30.050 30.053 30.056 30.059 101.8 | 30.061 30.064 30.067 30.070 30.073 30.076 30.079 30.082 30.085 30.088 101.9 | 30.091 30.094 30.097 30.100 30.103 30.106 30.109 30.112 30.115 30.118 | 102.0 | 30.121 30.124 30.126 30.129 30.132 30.135 30.138 30.141 30.144 30.147 102.1 | 30.150 30.153 30.156 30.159 30.162 30.165 30.168 30.171 30.174 30.177 102.2 | 30.180 30.183 30.186 30.188 30.191 30.194 30.197 30.200 30.203 30.206 102.3 | 30.209 30.212 30.215 30.218 30.221 30.224 30.227 30.230 30.233 30.236 102.4 | 30.239 30.242 30.245 30.248 30.250 30.253 30.256 30.259 30.262 30.265 | 102.5 | 30.268 30.271 30.274 30.277 30.280 30.283 30.286 30.289 30.292 30.295 102.6 | 30.298 30.301 30.304 30.307 30.310 30.312 30.315 30.318 30.321 30.324 102.7 | 30.327 30.330 30.333 30.336 30.339 30.342 30.345 30.348 30.351 30.354 102.8 | 30.357 30.360 30.363 30.366 30.369 30.372 30.375 30.377 30.380 30.383 102.9 | 30.386 30.389 30.392 30.395 30.398 30.401 30.404 30.407 30.410 30.413 | 103.0 | 30.416 30.419 30.422 30.425 30.428 30.431 30.434 30.437 30.439 30.442 103.1 | 30.445 30.448 30.451 30.454 30.457 30.460 30.463 30.466 30.469 30.472 103.2 | 30.475 30.478 30.481 30.484 30.487 30.490 30.493 30.496 30.499 30.501 103.3 | 30.504 30.507 30.510 30.513 30.516 30.519 30.522 30.525 30.528 30.531 103.4 | 30.534 30.537 30.540 30.543 30.546 30.549 30.552 30.555 30.558 30.561 | 103.5 | 30.563 30.566 30.569 30.572 30.575 30.578 30.581 30.584 30.587 30.590 103.6 | 30.593 30.596 30.599 30.602 30.605 30.608 30.611 30.614 30.617 30.620 103.7 | 30.623 30.626 30.628 30.631 30.634 30.637 30.640 30.643 30.646 30.649 103.8 | 30.652 30.655 30.658 30.661 30.664 30.667 30.670 30.673 30.676 30.679 103.9 | 30.682 30.685 30.688 30.690 30.693 30.696 30.699 30.702 30.705 30.708 | 104.0 | 30.711 30.714 30.717 30.720 30.723 30.726 30.729 30.732 30.735 30.738 104.1 | 30.741 30.744 30.747 30.750 30.752 30.755 30.758 30.761 30.764 30.767 104.2 | 30.770 30.773 30.776 30.779 30.782 30.785 30.788 30.791 30.794 30.797 104.3 | 30.800 30.803 30.806 30.809 30.812 30.814 30.817 30.820 30.823 30.826 104.4 | 30.829 30.832 30.835 30.838 30.841 30.844 30.847 30.850 30.853 30.856 | 104.5 | 30.859 30.862 30.865 30.868 30.871 30.874 30.877 30.879 30.882 30.885 104.6 | 30.888 30.891 30.894 30.897 30.900 30.903 30.906 30.909 30.912 30.915 104.7 | 30.918 30.921 30.924 30.927 30.930 30.933 30.936 30.939 30.941 30.944 104.8 | 30.947 30.950 30.953 30.956 30.959 30.962 30.965 30.968 30.971 30.974 104.9 | 30.977 30.980 30.983 30.986 30.989 30.992 30.995 30.998 31.001 31.003 | 105.0 | 31.006 31.009 31.012 31.015 31.018 31.021 31.024 31.027 31.030 31.033 Proportional kPa .001 .002 .003 .004 .005 .006 .007 .008 .009 parts in. Hg .000 .001 .001 .001 .001 .002 .002 .002 .003 THINK METRIC WAVE HEIGHTS m Feet Metres ||- 12 Montainous || || || || || || Very High || || || || || ||- 6 || || High || ||- 4 || Very Rough ||- 3 || Rough ||- 2 || Moderate ||- 1 Slight ||- 0.5 ||- 0 Smooth METRES TO FEET 1 metre = 3.2808399 feet metres 0 .1 .2 .3 .4 .5 .6 .7 .8 .9 ------------------------------------------------------------------------ | ft ft ft ft ft ft ft ft ft ft | 0 | 0.00 0.33 0.66 0.98 1.31 1.64 1.97 2.30 2.62 2.95 | 1 | 3.28 3.61 3.94 4.27 4.59 4.92 5.25 5.58 5.91 6.23 2 | 6.56 6.89 7.22 7.55 7.87 8.20 8.53 8.86 9.19 9.51 3 | 9.84 10.17 10.50 10.83 11.15 11.48 11.81 12.14 12.47 12.80 4 | 13.12 13.45 13.78 14.11 14.44 14.76 15.09 15.42 15.75 16.08 5 | 16.40 16.73 17.06 17.39 17.72 18.04 18.37 18.70 19.03 19.36 | 6 | 19.69 20.01 20.34 20.67 21.00 21.33 21.65 21.98 22.31 22.64 7 | 22.97 23.29 23.62 23.95 24.28 24.61 24.93 25.26 25.59 25.92 8 | 26.25 26.57 26.90 27.23 27.56 27.89 28.22 28.54 28.87 29.20 9 | 29.53 29.86 30.18 30.51 30.84 31.17 31.50 31.82 32.15 32.48 10 | 32.81 33.14 33.46 33.79 34.12 34.45 34.78 35.10 35.43 35.76 | 11 | 36.09 36.42 36.75 37.07 37.40 37.73 38.06 38.39 38.71 39.04 12 | 39.37 39.70 40.03 40.35 40.68 41.01 41.34 41.67 41.99 42.32 13 | 42.65 42.98 43.31 43.64 43.96 44.29 44.62 44.95 45.28 45.60 14 | 45.93 46.26 46.59 46.92 47.24 47.57 47.90 48.23 48.56 48.88 15 | 49.21 49.54 49.87 50.20 50.52 50.85 51.18 51.51 51.84 52.17 | 16 | 52.49 52.82 53.15 53.48 53.81 54.13 54.46 54.79 55.12 55.45 17 | 55.77 56.10 56.43 56.76 57.09 57.41 57.74 58.07 58.40 58.73 18 | 59.06 59.38 59.71 60.04 60.37 60.70 61.02 61.35 61.68 62.01 19 | 62.34 62.66 62.99 63.32 63.65 63.98 64.30 64.63 64.96 65.29 20 | 65.62 65.94 66.27 66.60 66.93 67.26 67.59 67.91 68.24 68.57 | 21 | 68.90 69.23 69.55 69.88 70.21 70.54 70.87 71.19 71.52 71.85 22 | 72.18 72.51 72.83 73.16 73.49 73.82 74.15 74.48 74.80 75.13 23 | 75.46 75.79 76.12 76.44 76.77 77.10 77.43 77.76 78.08 78.41 24 | 78.74 79.07 79.40 79.72 80.05 80.38 80.71 81.04 81.36 81.69 25 | 82.02 82.35 82.68 83.01 83.33 83.66 83.99 84.32 84.65 84.97 | 26 | 85.30 85.63 85.96 86.29 86.61 86.94 87.27 87.60 87.93 88.25 27 | 88.58 88.91 89.24 89.57 89.90 90.22 90.55 90.88 91.21 91.54 28 | 91.86 92.19 92.52 92.85 93.18 93.50 93.83 94.16 94.49 94.82 29 | 95.14 95.47 95.80 96.13 96.46 96.78 97.11 97.44 97.77 98.10 30 | 98.43 98.75 99.08 99.41 99.74 100.07 100.39 100.72 101.05 101.38