Active NOAA weather alerts for any US state — tornado warnings, flash flood watches, hurricane warnings, blizzard advisories, heat alerts, and 80+ other NWS event types. Real-time data from api.weather.gov; no API key. Filterable by state, event type, or severity. Returns event, severity, certainty, urgency, affected areas, onset/expiry, headline, and protective action instructions. Complements weather.js (forecasts) — this cap covers active emergencies.