When
the wind blows across the skin it removes the insulating layers of warm
molecules and replaces them with colder molecules
When all other
factors are the same, the faster the wind blows the greater the heat loss,
and the colder we feel
The amount of cooling one feels due to the combination of wind and temperature is called The Wind Chill Factor
| Windspeed Beuforth Scale | Windspeed | Air Temperature - Celsius | LA9QFA | ||||||||||||
| M/S |
15 |
0 | 5 | 0 | -5 | -10 | -15 | -20 | -25 | -30 |
Temperature |
||||
| Calm | Stille | 0 | 15 | 10 | 5 | 0 | -5 | -10 | -15 | -20 | -25 | -30 | |||
| Light Breeze | Svak Vind | 1.6 - 3.3 | 14 | 9 | 3 | -2 | -7 | -12 | -18 | -23 | -28 | -33 | |||
| Gentle Breeze | Let Bris | 3.4 - 5.4 | 10 | 4 | -2 | -8 | -14 | -20 | -26 | -32 | -38 | -44 | |||
| Moderate Breeze | Laber Bris | 5.5 - 7.9 | 8 | 2 | -4 | -11 | -18 | -25 | -32 | -38 | -45 | -52 | |||
| Fresh Breeze | Frisk Bris | 8.0 - 10.7 | 7 | 0 | -7 | -14 | -21 | -29 | -36 | -43 | -50 | -57 | |||
| Strong Breeze | Liten Kuling | 10.8 - 13.8 | 5 | -2 | -9 | -17 | -24 | -32 | -39 | -47 | -54 | -61 | |||
| Moderate Gale | Stiv Kuling | 13.9 - 17.1 | 5 | -3 | -11 | -18 | -26 | -34 | -42 | -49 | -57 | -65 | |||
| Fresh Gale | Sterk Kuling | 17,2 - 20,7 | 4 | -4 | -11 | -19 | -27 | -35 | 43 | -51 | -59 | -66 | |||
| Strong Gale | Liten Storm | 20.8 - 24.4 | 4 | -4 | -12 | -20 | -28 | -36 | -44 | -52 | -60 | -68 | |||
Little
danger if properly dressed
Danger of exposed skin freezing
Great danger of exposed skin freezing
Wind Chill Fahrenheit |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Air Temp (°F) | Wind Speed MPH | |||||||||
| 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | |
| 35° | 35 | 33 | 22 | 16 | 12 | 8 | 6 | 4 | 3 | 2 |
| 30° | 30 | 27 | 16 | 9 | 4 | 1 | -2 | -4 | -5 | -6 |
| 25° | 25 | 21 | 10 | 2 | -3 | -7 | -10 | -12 | -13 | -14 |
| 20° | 20 | 16 | 3 | -5 | -10 | -15 | -18 | -20 | -21 | -22 |
| 15° | 15 | 12 | -3 | -11 | -17 | -22 | -25 | -27 | -29 | -30 |
| 10° | 10 | 7 | -9 | -18 | -24 | -29 | -33 | -35 | -37 | -38 |
| 5° | 5 | 0 | -15 | -25 | -31 | -36 | -41 | -43 | -45 | -46 |
| 0° | 0 | -5 | -22 | -31 | -39 | -44 | -49 | -52 | -53 | -54 |
| -5° | -5 | -10 | -27 | -38 | -46 | -51 | -56 | -58 | -60 | -62 |
| -10° | -10 | -15 | -34 | -45 | -53 | -59 | -64 | -67 | -69 | -70 |
| -15° | -15 | -21 | -40 | -51 | -60 | -66 | -71 | -74 | -76 | -78 |