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WEATHER Wind Chill Chart Temperature (OF) Calm 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 S 36 31 25 19 13 7 1 5 -11 -16 -22 -28 -34 -40 -46 -52 -57 -63 10 34 27 21 15 9 3 -4 -10 -16 -22 -28 -35 -41 -47 -53 -59 -66 -72 15 32 25 19 13 6 0 -7 -13 -19 -26 -32 -39 -45 -51 -58 -64 -71 -77 30 24 17 11 4 -2 -9 -15 -29 -35 -42 -48 -55 -61 -68 -74 -81 es Wind (mph) 20 25 29 23 16 9 3 -4 -11 - -24 -31 -37 -44 -51 -58 -64 -71 -78 -84 ons 30 28 22 15 8 1 - 5 -12 -19 -26 -33 -39 -46 -53 -60 -67 -73 -80 -87 35 28 21 14 7 0 -7 -14 -21 -27 -34 -41 -48 -55 -62 -69 -76 -82 -89 40 27 20 13 6 -1 - 8 -15 -22 -29 -36 -43 -50 -57 -64 -71 -78 -84 -91 45 26 19 12 5 -2 -9 -16 -23 -30 -37 -44 -51 -58 -65 -72 -79 -86 -93 50 26 19 12 4 -3 -10 -17 -24 -31 -38 -45 -52 -60 -67 -74 -81 -88 -95 55 25 18 11 4 -3 -11 18 -25 -39 -46 -61 -68 -75 -82 -89 -97 60 25 17 10 3 -4 -11 -19 -26 -33 -40 -48 -55 -62 -69 -76 -84 -91 -98 Frostbite Times 30 minutes 10 minutes s minutes Wind Chill (OF) = 35.74 + 0.6215T - 35.75(V0.16) + 0.4275T(V0.16) Where, T= Air Temperature (OF) V= Wind Speed (mph) Effective 1 1/01/01 Estimate the rate of change of wind chill with respect to wind speed when the temperature is 15 F and the wind speed is 40 mph, that is ov (15.40)