P3 International E 9300 Wind strength table, Beaufort, Wind speed mph, Wind speed km/h

44.6˚F) to say how comfortable one feels at certain temperatures and wind speeds

whilst wearing appropriate clothing. These conditions are a temperature below 91.4Ê°F and a wind speed higher than 9.4 mph. Wind chill is defined as the cooling effect of uncovered skin at an assumed constant 91.4 °F skin surface temperature. The higher the wind speed is and the lower the actual temperature, the more noticeable is the wind chill effect.

The "perceived temperature" is roughly comparable to the so-called felt tempera- ture, which additionally takes into account the radiation effect of the sun, light re- fection from the clouds, the light wavelength, etc.

			Wind strength table
Beaufort	Wind speed mph			Wind speed km/h			Description
0	0	-	1	0	-	0.7	Calm
1	1	-	3	0.8	-	5.4	Slight air
2	4	-	7	5.5	-	11.9	Light breeze
3	8	- 12		12.0	-	19.4	Gentle breeze
4	13	- 18		19.5	-	28.5	Moderate breeze
5	19	- 24		28.6	-	38.7	Fresh breeze
6	25	- 31		38.8	-	49.8	Strong breeze
7	32	- 38		49.9	-	61.7	Moderate gale
8	39	- 46		61.8	-	74.6	Fresh gale
9	47	- 54		74.7	-	88.9	Strong gale
10	55	- 63		89.0	-	102.,4	Whole gale
11	64	- 72		102.5	-	117.4	Storm
12	> 73			> 117.4			Hurricane

The Comfort Indicator (ΛΚϑ) represents the climatic conditions, for which the following table is used (the symbol status shows the area of validity):

Temperature Humidity

20% 30% 35% 40% 45% 50% 55% 60% 65% 70%

<64.4°F	Λ	Λ	Λ	Λ	Λ	Λ	Λ	Λ	Λ	Λ
64.4°F-67.8°F	Λ	Λ	Λ	Κ	Κ	Κ	Κ	Κ	Κ	Λ
67.9° F-71.4°F	Λ	Λ	Λ	Κ	ϑ	ϑ	ϑ	ϑ	Κ	Λ
71.4°F-75.0°F	Λ	Λ	Κ	ϑ	ϑ	ϑ	ϑ	Κ	Λ	Λ
75.1° F-78.6°F	Λ	Κ	ϑ	ϑ	ϑ	ϑ	Κ	Λ	Λ	Λ
78.7°F-82.2°F	Λ	Κ	Κ	Κ	Κ	Κ	Κ	Λ	Λ	Λ
> 82.2°F	Λ	Λ	Λ	Λ	Λ	Λ	Λ	Λ	Λ	Λ

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