FA-70928 / Weather index computation / Member archive

Humidex with discomfort band: saturated air acceptance · case 03

Foggy saturated air with dew point equal to temperature returns no humidex.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input air temperature and dew point in degC. If dew point exceeds air temperature return None. e = 6.11*exp(5417.7530*(1/273.16 - 1/(273.15+Td))); H = T + 0.5555*(e - 10); report the humidex rounded half up to an integer and a band on that integer: <30 comfortable, 30-39 some discomfort, 40-45 great discomfort, 46-53 dangerous, >=54 heat stroke imminent.

Why this case matters

Summer heat bulletins publish humidex with a discomfort band.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
air 20 C dew point 20 C	`null`	`[28, "comfortable"]`	Failed

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