### Digital Atmosphere using pre-2001 Wind Chill Formula

Posted:

**Wed Feb 06, 2019 9:44 pm**Hi Tim,

It appears as if DA 3.10a is still using the pre 2001 wind chill formula when calculating wind chills. Below is a graphic.

For the site circled in red in South Dakota (KD07), the temperature in Fahrenheit is plotted as -4 (-20.0C in the QC window) and the wind is from the north at 18 kts. DA plots the wind chill in Fahrenheit as -45 (lower right number on the plot for D07). The NWS webpage on the left has the wind chill calculator using the formula in use since 2001. Plugging in the -20.0C temp and 18 kt wind, gives a wind chill in Fahrenheit of -27.6.

Could this be fixed, or an additional Wind Chill value added for the newer formula? Thanks.

George

It appears as if DA 3.10a is still using the pre 2001 wind chill formula when calculating wind chills. Below is a graphic.

For the site circled in red in South Dakota (KD07), the temperature in Fahrenheit is plotted as -4 (-20.0C in the QC window) and the wind is from the north at 18 kts. DA plots the wind chill in Fahrenheit as -45 (lower right number on the plot for D07). The NWS webpage on the left has the wind chill calculator using the formula in use since 2001. Plugging in the -20.0C temp and 18 kt wind, gives a wind chill in Fahrenheit of -27.6.

Could this be fixed, or an additional Wind Chill value added for the newer formula? Thanks.

George