|
Wind Speed
|
Cooling Power of Wind Expressed as "Equivalent Chill Temperature"
|
|
MPH
|
Temperature (degrees F)
|
|
Calm
|
40
|
35
|
30
|
25
|
20
|
15
|
10
|
5
|
0
|
-5
|
-10
|
-15
|
-20
|
-25
|
-30
|
-35
|
-40
|
-45
|
-50
|
-55
|
-60
|
|
|
Equivalent Chill Temperature
|
|
5
|
35
|
30
|
25
|
20
|
15
|
10
|
5
|
0
|
-5
|
-10
|
-15
|
-20
|
-25
|
-30
|
-35
|
-40
|
-45
|
-50
|
-55
|
-65
|
-70
|
|
10
|
30
|
20
|
15
|
10
|
5
|
0
|
-10
|
-15
|
-20
|
-25
|
-35
|
-40
|
-45
|
-50
|
-60
|
-65
|
-70
|
-75
|
-80
|
-90
|
-95
|
|
15
|
25
|
15
|
10
|
0
|
-5
|
-10
|
-20
|
-25
|
-30
|
-40
|
-45
|
-50
|
-60
|
-65
|
-70
|
-80
|
-85
|
-90
|
-100
|
-105
|
-110
|
|
20
|
20
|
10
|
5
|
0
|
-10
|
-15
|
-25
|
-30
|
-35
|
-45
|
-50
|
-60
|
-65
|
-75
|
-80
|
-85
|
-95
|
-100
|
-110
|
-115
|
-120
|
|
25
|
15
|
10
|
0
|
-5
|
-15
|
-20
|
-30
|
-35
|
-45
|
-50
|
-60
|
-65
|
-75
|
-80
|
-90
|
-95
|
105
|
-110
|
-120
|
-125
|
-135
|
|
30
|
10
|
5
|
0
|
-10
|
-20
|
-25
|
-30
|
-40
|
-50
|
-55
|
-65
|
-70
|
-80
|
-85
|
-95
|
-100
|
-110
|
-115
|
-125
|
-130
|
-140
|
|
35
|
10
|
5
|
-5
|
-10
|
-20
|
-30
|
-35
|
-40
|
-50
|
-60
|
-65
|
-75
|
-80
|
-90
|
-100
|
-105
|
-115
|
-120
|
-130
|
-135
|
-145
|
|
40
|
10
|
0
|
-5
|
-15
|
-20
|
-30
|
-35
|
-45
|
-55
|
-60
|
-70
|
-75
|
-85
|
-95
|
-100
|
-110
|
-115
|
-125
|
-130
|
-140
|
-150
|
|
Winds above 40 have little additional effect
|
Little danger
|
Increasing Danger (Flesh may freeze within 1 min.)
|
Great Danger (Flesh may freeze within 30 sec.)
|
Danger of freezing exposed flesh for properly clothed persons
|
|
|
Contrary to what some believe, the wind chill factor does not
lower the air temperature. It does not matter how strong the wind is; the
temperature remains constant unless progressively colder air is moving into the
region. The wind chill factor is a measure of how fast heat is being removed
from your body. If the air temperature is 40 degrees and the wind is blowing at
20 miles per hour, it feels the same as 20 degrees with no wind at all.
|
