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rlwilliamson-dev
2cec9973dc
The Open-Meteo forecast model smooths away scattered, pop-up convection, so the rain nowcast (the rain/snow command and the proactive push) could read 0.0 in / ~12% and stay silent while rain was actually falling. Observed near Nashville: Open-Meteo reported 0.0 in across the next 3 h while NWS's own gridpoint showed 65-74% probability with measurable QPF, and thunderstorms were occurring. Add fetch_precip_series_nws(), which builds the same nowcast-series shape from the NWS gridpoint forecast (6-hour QPF + hourly PoP + weather type). Each hour's precip is its QPF share, zeroed when that hour's PoP is below a floor, so the predicted rain-start tracks the hourly probability instead of snapping to coarse 6-hour QPF boundaries. Both fetchers now prefer NWS for US points and fall back to Open-Meteo where NWS has no coverage (outside the US) or on failure, so the command and the push agree and the model's convective blind spot no longer silences the alert. Pure helpers (_iso_duration_hours, _nws_hourly, _nws_weather_code) are unit-tested; the NWS-weather -> WMO-code mapping keeps bucket classification (rain/snow/thunder/...) identical to the Open-Meteo path.