Tomorrow
100–150 AQITypical regional AQICleaner: Silver Valley 50–135 · Smokier: Deer Park 215–220
Today’s smoke outlook
70–110 AQI
Moderate to Unhealthy for Sensitive Groups
Typical regional AQI · Today
Surface smoke likelihood is high and elevated smoke likelihood is high; the most likely AQI range is 90-155. Satellite analysis detected visible smoke over or near the region. Community sensors show a northeast to southwest gradient.
Later
145–150 AQITypical regional AQICleaner: Colville 125–130 · Smokier: Deer Park 215–220
Localized conditions vary from the typical range
- Deer Park area120–220
- Colville area40–130
- Newport–Cusick65–110
- Metaline Falls area55–65
- Spokane metro125–205
- Coeur d’Alene corridor100–175
- Rockford area90–185
- North Idaho / Northwest Montana65–95
- Silver Valley65–85
Representative location forecasts; localized exceptions are shown separately from the full regional envelope.
- Peak risk
- Thursday Midday
- Surface smoke
- High likelihood
- Primary direction
- W → E
- Forecast horizon
- Next 48 hours
Why this forecast?
- Wind unavailable Mixing is unavailable; surface transport likelihood is unavailable.
- NW wind carries air toward SE at 5 mph. Mixing is deep; surface transport likelihood is moderate.
- All essential forecast components are rated medium or higher, so overall confidence is medium.
Upcoming periods
TUESDAY, AUGUST 4
Midday
Varies by area · typical AQI
- Deer Park140–145
- Colville55–60
- Newport–Cusick70–75
- Metaline Falls55–60
- Spokane metro125–130
- CdA corridor100–105
- Rockford110–115
- North ID / NW MT70–70
- Silver Valley80–85
Unavailable
Unavailable mixing
Surface Unavailable
Likelihood of smoke affecting near-ground air during this period.
Aloft Unavailable
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
Late Day
Varies by area · typical AQI
- Deer Park120–155variable
- Colville59 ↘ 47
- Newport–Cusick72 ↗ 84
- Metaline Falls55–65
- Spokane metro129 ↗ 202
- CdA corridor100–160variable
- Rockford111 ↗ 183
- North ID / NW MT65–95variable
- Silver Valley65–85variable
NW→SE · 5 mph · Light
Deep mixing
Surface Moderate
Likelihood of smoke affecting near-ground air during this period.
Aloft Moderate
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
Evening / Overnight
Varies by area · typical AQI
- Deer Park148 ↗ 216
- Colville45 ↗ 126
- Newport–Cusick65–150variable
- Metaline Falls59 ↗ 115
- Spokane metro195–200
- CdA corridor170–175
- Rockford175–185
- North ID / NW MT75–95variable
- Silver Valley65–80variable
Variable · 3 mph
Shallow mixing
Surface High
Likelihood of smoke affecting near-ground air during this period.
Aloft Moderate
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
WEDNESDAY, AUGUST 5
Morning
Varies by area · typical AQI
- Deer Park215–220
- Colville125–130
- Newport–Cusick146 ↘ 126
- Metaline Falls115–130
- Spokane metro190–200
- CdA corridor170–175
- Rockford183 ↘ 142
- North ID / NW MT75–85
- Silver Valley55–65
Calm · 2 mph
Shallow mixing
Surface High
Likelihood of smoke affecting near-ground air during this period.
Aloft High
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
Midday
Varies by area · typical AQI
- Deer Park215–220
- Colville125–130
- Newport–Cusick121 ↗ 146
- Metaline Falls125–130
- Spokane metro185–200
- CdA corridor170–175
- Rockford145–175variable
- Sandpoint100–145variable
- Bonners Ferry78 ↗ 140
- Libby78 ↗ 153
- Silver Valley50–60
W→E · 2 mph · Light
Moderate mixing
Surface High
Likelihood of smoke affecting near-ground air during this period.
Aloft High
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
Late Day
Varies by area · typical AQI
- Deer Park215–220
- Colville125–130
- Newport–Cusick145–150
- Metaline Falls125–130
- Spokane metro179 ↗ 196
- CdA corridor170–175
- Rockford140–160variable
- North ID / NW MT140–145
- Kellogg73 ↗ 124
- Mullan55 ↗ 73
W→E · 5 mph · Light
Deep mixing
Surface High
Likelihood of smoke affecting near-ground air during this period.
Aloft High
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
Evening / Overnight
Varies by area · typical AQI
- Deer Park215–220
- Colville125–130
- Newport–Cusick145–150
- Metaline Falls125–130
- Spokane metro195–200
- CdA corridor170–175
- Rockford150–185variable
- North ID / NW MT140–145
- Kellogg140–155
- Mullan75–135variable
SW→NE · 3 mph · Light
Shallow mixing
Surface High
Likelihood of smoke affecting near-ground air during this period.
Aloft High
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
THURSDAY, AUGUST 6
Morning
Varies by area · typical AQI
- Deer Park215–220
- Colville125–130
- Newport–Cusick145–150
- Metaline Falls125–130
- Spokane metro196 ↘ 184
- CdA corridor170–175
- Rockford160–175
- North ID / NW MT140–145
- Silver Valley130–145
S→N · 3 mph · Light
Shallow mixing
Surface High
Likelihood of smoke affecting near-ground air during this period.
Aloft High
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
Midday
Varies by area · typical AQI
- Deer Park215–220
- Colville125–130
- Newport–Cusick145–150
- Metaline Falls125–130
- Spokane metro180–185
- CdA corridor170–175
- Rockford170–175
- North ID / NW MT140–145
- Silver Valley145–150
SW→NE · 6 mph · Light
Limited mixing
Surface High
Likelihood of smoke affecting near-ground air during this period.
Aloft High
Likelihood of elevated smoke overhead; this does not by itself indicate surface AQI impact.
Location AQI forecast
AQI FORECAST — SPOKANE, WA
Last 47.9 Hours (History) • Next 48 Hours (Forecast) • Regulatory monitor composite
Observed historyForecast medianForecast range
AQI FORECAST — COEUR D’ALENE, ID
Last 47.9 Hours (History) • Next 48 Hours (Forecast) • Regulatory monitor composite
Observed historyForecast medianForecast range
AQI FORECAST — MULLAN, ID
Last 47.9 Hours (History) • Next 48 Hours (Forecast) • Regulatory monitor composite
Observed historyForecast medianForecast range
AQI FORECAST — COLVILLE, WA
Last 47.9 Hours (History) • Next 48 Hours (Forecast) • Regulatory monitor composite
Observed historyForecast medianForecast range
AQI FORECAST — CUSICK, WA
Last 47.9 Hours (History) • Next 48 Hours (Forecast) • Regulatory monitor composite
Observed historyForecast medianForecast range
AQI FORECAST — SANDPOINT, ID
Last 47.9 Hours (History) • Next 48 Hours (Forecast) • Regulatory monitor composite
Observed historyForecast medianForecast range
Smoke movement
Dominant W flow transports air toward E during midday. The leading ordinal source candidates are Southern British Columbia fire activity, Northern Idaho fire activity, Northeastern Washington fire activity.
REGIONAL SOURCES AND TRANSPORT
INLAND NORTHWEST
Latest satellite
Aqua / MODIS · August 3, 2026 · approx. 1:30 PM local-solar pass
Retrieved August 3, 2026 at 11:05 PM PDT
NASA EOSDIS GIBS · True-color imagery; clouds and smoke may look similar. Not a surface AQI measurement. ?
Source potential
Ranked source potential, not estimated percentage contribution.
| Rank | Source | Potential | Evidence |
|---|---|---|---|
| 1 | High | Regional aggregate High ordinal potential from 2 unresolved source clusters in this region. | |
| 2 | High | Regional aggregate High ordinal potential from 1 unresolved source cluster in this region. | |
| 3 | High | Regional aggregate High ordinal potential from 1 unresolved source cluster in this region. | |
| 4 | Medium | Verified Very Active · report 17h old — Operational report notes torching and wind driven fire. | |
| 5 | Medium | Verified Moderate · report 19h old — Operational report notes torching. |
Official fire perimeter
Recent FIRMS thermal detection
FIRMS detections through Aug 4, 1:35 PM PDT
High potential. High ordinal potential from 2 unresolved source clusters in this region.
Included fire activity
- Thermal cluster 1
- Thermal cluster 2
Official perimeters are cumulative mapped fire extents. FIRMS points are satellite thermal anomalies—not active flame boundaries, smoke measurements, or proof of source contribution.
Official fire perimeter
Recent FIRMS thermal detection
FIRMS detections through Aug 4, 1:35 PM PDT
High potential. High ordinal potential from 1 unresolved source cluster in this region.
Official perimeters are cumulative mapped fire extents. FIRMS points are satellite thermal anomalies—not active flame boundaries, smoke measurements, or proof of source contribution.
Official fire perimeter
Recent FIRMS thermal detection
FIRMS detections through Aug 4, 1:35 PM PDT
High potential. High ordinal potential from 1 unresolved source cluster in this region.
Official perimeters are cumulative mapped fire extents. FIRMS points are satellite thermal anomalies—not active flame boundaries, smoke measurements, or proof of source contribution.
Official fire perimeter
Recent FIRMS thermal detection
FIRMS detections through Aug 4, 1:35 PM PDT
Official mapped perimeter: 102,934 acres
Medium potential. Very Active · report 17h old — Operational report notes torching and wind driven fire.
Official perimeters are cumulative mapped fire extents. FIRMS points are satellite thermal anomalies—not active flame boundaries, smoke measurements, or proof of source contribution.
Official fire perimeter
Recent FIRMS thermal detection
FIRMS detections through Aug 4, 1:35 PM PDT
Official mapped perimeter: 5,869 acres
Medium potential. Moderate · report 19h old — Operational report notes torching.
Official perimeters are cumulative mapped fire extents. FIRMS points are satellite thermal anomalies—not active flame boundaries, smoke measurements, or proof of source contribution.
Source evidence
Forecast confidence
81% · Medium confidence- Satellite analysis detected visible smoke over or near the region.
- Surface smoke signal is high.
- Elevated smoke signal is high.
- Community sensors show a northeast to southwest gradient.
- All essential forecast components are rated medium or higher, so overall confidence is medium.
About this forecast
This forecast combines fire detections, official incident intelligence, weather and smoke-transport models, satellite-visible smoke, and surface observations to estimate smoke conditions.
Methodology and limitations
- Ordinal source potential — not percentage contribution
- FIRMS detections are thermal anomalies, not fire perimeters.
- Trajectory lines are model wind paths, not smoke plumes.
- HRRR-Smoke is model output, not observed PM2.5 or AQI.
- No direct conversion from HRRR-Smoke concentration to AQI is applied.
- The local AQI area is a calibrated model-derived heuristic, not observed AQI.
- NOAA HMS polygons show satellite-visible column smoke, not surface PM2.5 or AQI.