Wind chill and the Wind Chill Index

en · unofficial · sha256:d105d724f77680fd789770b756403a170b797fbad351cbebf0261f131c59e39b

When the temperature is above zero, we don't show the wind chill because there is no risk of frostbite no matter how windy it is.

Referencing norms: no-frostbite-above-zero

en · unofficial · sha256:eaae157b00877a585d165f910e0d392e4bf79fe80dac94e67bc328a4c54fe6a3

Low risk exposure 0 to -9 wind chill value slight increase in physical discomfort Moderate risk exposure -10 to -27 wind chill value physical discomfort risk of hypothermia and frostbite if outdoors for long periods of time without adequate protection High risk exposure -28 to -39 wind chill value any exposed skin can freeze in 10 to 30 minutes high risk of frostnip or frostbite: check your face and extremities for numbness or whiteness high risk of hypothermia if you remain outside for long periods without adequate clothing or shelter from wind and cold Very high risk exposure -40 to -47 wind chill value any exposed skin can freeze in 5 to 10 minutesFootnote 1 very high risk of frostbite: check your face and extremities for numbness or whiteness very high risk of hypothermia if you are outside for long periods without adequate clothing or shelter from wind and cold Severe risk exposure -48 to -54 wind chill value exposed skin can freeze in 2 to 5 minutesFootnote 1 severe risk of frostbite: check your face and extremities frequently for numbness or whiteness. There is severe risk of hypothermia if you are outside for long periods without adequate clothing or shelter from wind and cold Extreme risk exposure -55 or colder wind chill value exposed skin can freeze in less than 2 minutesFootnote 1 DANGER! outdoor conditions are hazardous

Referencing norms: band-extreme, band-high, band-low, band-moderate, band-severe, band-very_high, freeze-extreme, freeze-high, freeze-severe, freeze-very_high

en · unofficial · sha256:abfa34fb92c149258bc9642323bdaf24a59da6fab9ef6fa9739f76cdd7756fb1

In sustained winds over 50 km/h, frostbite can occur faster than indicated.

Referencing norms: faster-above-wind

en · unofficial · sha256:96d4fb17fa8ea808fbb9aa75fb4a97110ce409a69d6e927a611f4cabff4476fb

When temperatures are zero or below and the wind speed is 5 km/h or higher, we include wind chill in the weather conditions and forecasts. We only send out wind chill forecasts for today, tonight and tomorrow. We do not include wind chill for the full seven-day weather forecast.

Referencing norms: reported-at-or-below, reported-from-wind

en · unofficial · sha256:581f964420084b77c884f4ad02a81bd3ce96433bb38207a6cd73a8a6869ebe1d

Wind chill index (temperature in °C) Wind speed (km/h) Estimating wind speed - what to look for 0 - 5 -10 -15 -20 -25 -30 -35 -40 -45 -50 10 Wind felt on face - wind vane begins to move -3 - 9 -15 -21 -27 -33 -39 -45 -51 -57 -63 20 Small flags extended -5 -12 -18 -24 -30 -37 -43 -49 -56 -62 -68 30 Wind raises loose paper, large flags flap and small tree branches move -6 -13 -20 -26 -33 -39 -45 -52 -59 -65 -72 40 Small trees begin to sway and large flags extend and flap strongly -7 -14 -21 -27 -34 -41 -48 -54 -61 -68 -74 50 Large branches of trees move, telephone wires whistle -8 -15 -22 -29 -35 -42 -49 -56 -63 -69 -76 60 Trees bend and walking against the wind is hard -9 -16 -23 -30 -36 -43 -50 -57 -64 -71 -78

Referencing norms: wc-10-0, wc-10-m10, wc-10-m15, wc-10-m20, wc-10-m25, wc-10-m30, wc-10-m35, wc-10-m40, wc-10-m45, wc-10-m5, wc-10-m50, wc-20-0, wc-20-m10, wc-20-m15, wc-20-m20, wc-20-m25, wc-20-m30, wc-20-m35, wc-20-m40, wc-20-m45, wc-20-m5, wc-20-m50, wc-30-0, wc-30-m10, wc-30-m15, wc-30-m20, wc-30-m25, wc-30-m30, wc-30-m35, wc-30-m40, wc-30-m45, wc-30-m5, wc-30-m50, wc-40-0, wc-40-m10, wc-40-m15, wc-40-m20, wc-40-m25, wc-40-m30, wc-40-m35, wc-40-m40, wc-40-m45, wc-40-m5, wc-40-m50, wc-50-0, wc-50-m10, wc-50-m15, wc-50-m20, wc-50-m25, wc-50-m30, wc-50-m35, wc-50-m40, wc-50-m45, wc-50-m5, wc-50-m50, wc-60-0, wc-60-m10, wc-60-m15, wc-60-m20, wc-60-m25, wc-60-m30, wc-60-m35, wc-60-m40, wc-60-m45, wc-60-m5, wc-60-m50