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PostPosted: Wed Feb 06, 2019 9:44 pm 
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Joined: Thu Jul 15, 2004 3:42 pm
Posts: 34
Location: Kansas
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


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