We check our work in public.
Trust should be earned, not asserted. This page runs a live comparison of our wet-bulb globe temperature against the U.S. National Weather Service’s own published WBGT at a set of cities across the country — recomputed continuously, shown warts and all.
How to read this. Δ is our value minus the NWS value, in °C. The comparison mixes two things: the WBGT physics (where we use the validated Liljegren method) and the underlying weather inputs — NWS drives its WBGT from the National Blend of Models while we use Open-Meteo’s blend. So part of any disagreement is the two systems differing on clouds and sunlight at that hour, not on the heat-stress calculation itself. Mean agreement within about ±1.5 °C is our target.
Reproduce it. The exact comparison runs as an automated test (npm run validate:wbgt) and as the public /api/validation endpoint. Every formula behind our number is in the methodology.
Data: Open-Meteo, NWS (api.weather.gov).
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