UV Index

Click anywhere on the national UV map for an hourly UV forecast at the nearest sampled grid point. Values on the layer use the OpenWeather hourly step at 13:00 local time per grid cell (approximately midday peak), interpolated on ~2° spacing over CONUS — see the footnote on the map for the exact generation time.

National UV Map

Loading map freshness…

No UV map available yet. Run python -m modules.UV.map_uv_national to generate (requires OWM_API_KEY in .env).

UV Index Scale

0–2 Low 3–5 Moderate 6–7 High 8–10 Very High 11+ Extreme

Grid time convention (advanced)

The national map layer uses the OpenWeather hourly step at 13:00 local per grid cell. This panel compares modeled CONUS-wide maxima from the same cached forecast window — not a different map layer. Market rollup table below still uses the standard daily grid convention.

Alternate local hour: Optional. Recomputes CONUS max at the chosen local clock hour per grid cell from cached hourly forecast — not a map layer.

Market peak UV rollup — latest national grid UTC day

Ranked modeled peaks from the coarse CONUS grid (~13:00 local step per sample). Opens the hourly UV chart at representative coordinates inside each market centroid assignment.