Legend
GO — No restrictions
CAUTION — Monitor; adjust
STOP — Suspend / shelter
No data
Categories
Heat · Cold · Lightning · Wind · Precip · NWS Hazards · Air Quality
Site = worst single category
Site = worst single category
PM2.5 Scale (EPA AQI)
0–9.0 μg/m³ — Good
9.1–35.4 — Moderate
35.5–55.4 — Unhealthy (Sensitive)
55.5–125.4 — Unhealthy
125.5–225.4 — Very Unhealthy
>225.4 — Hazardous
EPA AQI breakpoints (rev. 2024-05-06). Stoplight: Good=GO,
Moderate/Sensitive=CAUTION, Unhealthy+=STOP.
Sites
Data Sources
METAR — observed, from nearest reporting station
Model F00 — analysis hour (HRRR/GFS)
Marker uses more recent of the two
Model F00 — analysis hour (HRRR/GFS)
Marker uses more recent of the two
⚡ GLM Lightning
Loading…
Reflectivity (dBZ)
5–20 light
20–35 moderate
35–45 heavy
45–60 very heavy/hail
60+ extreme
20–35 moderate
35–45 heavy
45–60 very heavy/hail
60+ extreme
10–40 kt inbound
40+ kt inbound
10–40 kt outbound
40+ kt outbound
green = toward radar, red = away
40+ kt inbound
10–40 kt outbound
40+ kt outbound
green = toward radar, red = away
0–5 min — Stop if within 5NM
5–15 min — Caution
15–30 min — Resume if clear
5–15 min — Caution
15–30 min — Resume if clear
💨 Smoke (HRRR)
Uses the same EPA AQI breakpoints/colors as the PM2.5 scale above
(Good untinted). HRRR F00–F03, updated hourly.
🌡 Air Quality (Observed)
Prototype: inverse-distance-weighted contour built from live AirNow
station readings (ground obs, not modeled). Sparse away from
monitors -- compare against HRRR smoke above rather than trusting
either alone. Dots are the actual stations used.
◎ Range Rings
5 NM
15 NM
25 NM
15 NM
25 NM
Loading site data…
—
—
—
UNKNOWN