No recent measurement is available from the nearest station. Environment Canada's Air Quality Health Index nearby is 1.
Models forecast PM2.5 peaking near 4 µg/m³ within the next 48 hours.
No significant smoke is expected in the next 48 hours.
1–3 low · 4–6 moderate · 7–10 high · 10+ very high · Forecast squares are Environment Canada's official AQHI period maximums.
● FireSmoke · ● FireWork
Background bands (US EPA AQI, 24-h basis): ■ Good · ■ Moderate
| Model | Peak PM2.5 | Peak around |
|---|---|---|
| FireSmoke (UBC BlueSky) | 0 µg/m³ | Aug 07, 3:30AM |
| FireWork (ECCC) | 4 µg/m³ | Aug 06, 5:30PM |
Model values are for the ~10 km grid cell nearest St. John's; the two models are independent and often disagree — treat the higher value as the cautious planning number.
Observations and NowCast are total PM2.5 — wildfire smoke plus every other source — as regulatory monitors measure it, and FireWork models that same total. FireSmoke is a smoke-dispersion model: it estimates the wildfire contribution only, so it reads lower than the monitors whenever other sources matter. The map's optional plume layer is likewise fires-only.
Little smoke at the surface or overhead.
● At the ground · ● Overhead (relative)
Overhead smoke dims the sun but is not what you breathe. The dashed line is the column total scaled to a typical mixed plume, so it is comparable in shape, not in units · Data: ECCC FireWork
Open the live chart for St. John's — hourly observations, NowCast and both model forecasts.
See the Newfoundland and Labrador-wide forecast — every monitor, ranked →