20 µg/m³ measured at PRG Plaza 400, 1 km away, at Aug 06, 11:00AM. The NowCast smoke average is 19 µg/m³ — Moderate on the US EPA scale. Environment Canada's Air Quality Health Index nearby is 2.
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Forecast concentrations are below current levels and expected to ease over 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.
● Observed (hourly) · ● 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 06, 10:00PM |
| FireWork (ECCC) | 9 µg/m³ | Aug 07, 8:00AM |
Model values are for the ~10 km grid cell nearest Prince George; 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
19-day record · 1 nearby monitors
| Model | Typical error | Tendency |
|---|---|---|
| FireWork | 6.8 µg/m³ | no clear bias |
| FireSmoke | 10.2 µg/m³ | reads low 7.8 |
Mean absolute error and average tendency in µg/m³, from forecasts verified 0–6 hours ahead at monitors within 50 km. A short-range record, not a measure of how far ahead a model stays reliable. FireSmoke and HRRR model wildfire smoke only, so they read below the monitors whenever other sources of PM2.5 matter.
Open the live chart for PRG Plaza 400 — hourly observations, NowCast and both model forecasts.
See the British Columbia-wide forecast — every monitor, ranked →
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