Version: Self-heat RH warn 50–59% / prime 60–70% / moving too-rich 71–79% / too-rich ≥80% · Dust RH warn 16–20% / peak ≤15% · Data: U.S. National Weather Service (api.weather.gov), nearest-station observations. Confidence reflects station distance, observation age, and missing fields — treat LOW-confidence sites with caution and consider an on-site sensor. Audible alarm and alert log are per-session and reset on page reload; click Sound to enable audio (browsers require one click before they allow sound). Screening aid based on ambient weather only; it does not replace in-pile / silo temperature and CO monitoring, gas sampling, or dust-suppression controls.