FA-70884 / Weather index computation / Member archive

Wind chill from km/h anemometer: temperature-wind interaction term · case 04

Wind chill no longer converges as wind changes; values are off by several degrees.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input temperature in degF and wind in km/h. Convert wind to mph (divide by 1.609344). If T > 50 degF or wind below 3 mph, return T rounded to 0.1. Otherwise return 35.74 + 0.6215T - 35.75V^0.16 + 0.4275T*V^0.16 rounded to 0.1.

Why this case matters

Cold-weather advisories and frostbite timing use the wind chill index.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
-20F with 32 km/h wind	`-42.9`	`-48.2`	Failed

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