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Tap any fire or hot spot on the map for its name and perimeter.
≈ EPA AQI for total fine-particle air (PM2.5): wildfire smoke, dust, and typical pollution from traffic and industry, combined, from NOAA's smoke model plus Environment and Climate Change Canada's air-quality model. A modeled forecast, not an official AQI reading.
The model works on a grid about 3 km across, so zooming in shows more map, not more model. A reading is for the neighbourhood, not a single address.
Total-column smoke (mg/m²): how much haze is overhead in the whole air column. High values dim the sun even when surface air stays breathable.
Hot spots (via satellite)
Heat detections from the past 24 hours, which may be where the smoke is coming from. Includes prescribed and agricultural burns, not just wildfires.
Fires likely producing smoke
Named wildfires still burning and over 100 acres. Satellites miss smouldering fires, so these can matter even where there is no hot spot. A mostly contained fire often puts out more fine smoke per acre than a fresh one.
Contained or small fires
Named fires that are fully contained, or under 100 acres. Real fires, but unlikely to be what you are breathing.
Smoke overlay
The coloured layer is total fine-particle air quality (≈AQI): wildfire smoke, dust, and typical pollution from traffic and industry, combined. Clean air shows no colour at all. Turn it off to see the shaded relief map underneath, which is useful when you are placing a custom pin. Tap and hold the map to drop one.
Your favorites on the map
Mark each of your saved places on the map with a coloured dot, so you can see how all of them look at once. The dot follows the hour you’re looking at, so it changes as you scrub through the forecast.
Nearest monitor reading
What an EPA instrument actually measured near you, shown as an AQI. It reads all fine particles, not smoke alone, and runs about two hours behind.
Wherever one of these sits within 20 miles, its reading is the number this app shows you for that place, so we agree with the official figure rather than guessing at it.
Show these readings as
Which way I’m facing
Add a compass beam to the blue dot so you can tell which direction you’re looking.
This bar is a chart. Its colors show your location’s air quality for the next 72 hours (hour by hour). Green = good air, yellow and up = worse. Drag the white dot or press play.
Tap a fire for its name, size, perimeter, and containment. Tap and hold anywhere else on the map to drop a pin: a trailhead, campsite, etc.
Total fine-particle air at breathing level, shown as an approximate AQI. Wildfire smoke, dust, and typical pollution from traffic and industry, combined.
Favorites
Data & credits
Data: NOAA RRFS smoke model; air-quality background: Data Source: Environment and Climate Change Canada. Rendered by SmokeCast. SmokeCast is an independent app, not affiliated with or endorsed by NOAA. Not an official air-quality forecast. Interface developed by Kyle Allred · place search © GeoNames (CC BY 4.0)