FA-70933 / Weather index computation / Member archive

Shade apparent temperature: wind speed units · case 03

Breezy days feel implausibly cold; a 36 km/h wind lowers the value by 25 degrees.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input air temperature degC, RH percent, wind in km/h measured at 10 m. e = RH/100*6.105*exp(17.27*Ta/(237.7+Ta)) hPa; wind in m/s = km/h / 3.6; AT = Ta + 0.33e - 0.70ws - 4.00 rounded to 0.1.

Why this case matters

Feels-like temperature on consumer forecasts uses this non-radiative apparent temperature.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
-5 C 90% RH wind 10 km/h	`-14.7`	`-9.7`	Failed

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