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Wildfire Notification Report

Date: 2026-04-21
Time: 19:41:17
Production Date and Time: 2026-04-21 19:46:07 UTC
Primary Instrument: GOES-18 ABI
Wmo Spacecraft Id: 665
Location/orbit: GEO
L1 File: OR_ABI-L1b-RadC-M6C14_G18_s20261111941171_e20261111943544_c20261111944036.nc
L1 File(s) - TemporalOR_ABI-L1b-RadC-M6C14_G18_s20261111936171_e20261111938544_c20261111939039.nc
Number Of Thermal Anomaly Notifications: 4
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Possible Wildfire

Basic Information
State/Province(s) WA
Country/Countries United States
County/Locality(s) Whitman County, WA
NWS WFO Spokane WA
Identification MethodEnhanced Contextual (Clear)
Mean Object Date/Time2026-04-21 19:41:23UTC
Radiative Center (Lat, Lon): 47.180000°, -117.049164°
Nearby Counties (meeting notification criteria):
  • Whitman County (0.00 km)
Total Radiative Power Anomalyn/a
Total Radiative Power27.61 MW
Map:
Additional Information
Notification Status New Feature
Type of EventNominal Fire Risk
Event Priority Ranking4
Maximum Observed BT (3.9 um)305.99 K
Observed - Background BT (3.9 um)5.38 K
BT Anomaly (3.9 um)2.48 K
Maximum Observed - Clear RTM BT (3.9 um)15.92 K
Maximum Observed BTD (3.9-10/11/12 um)17.91 K
Observed - Background BTD (3.9-10/11/12 um)5.70 K
BTD Anomaly (3.9-10/11/12 um)4.29 K
Similar Pixel Count20
BT Time Tendency (3.9 um)1.70 K
Image Interval5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder0.59
Fraction of Surrounding Red Channel Pixels that are Brighter0.96
Maximum Radiative Power27.61 MW
Maximum Radiative Power Uncertainty0.00 MW
Total Radiative Power Uncertainty0.00 MW
Mean Viewing Angle 58.00°
Mean Solar Zenith Angle 35.70°
Mean Glint Angle90.10°
Water Fraction0.00
Total Pixel Area 7.50 km2
Latest Satellite Imagery:
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Possible Wildfire

Basic Information
State/Province(s) WA
Country/Countries United States
County/Locality(s) Whitman County, WA
NWS WFO Spokane WA
Identification MethodEnhanced Contextual (Clear)
Mean Object Date/Time2026-04-21 19:41:23UTC
Radiative Center (Lat, Lon): 47.123333°, -117.592499°
Nearby Counties (meeting notification criteria):
  • Whitman County (0.00 km)
Total Radiative Power Anomalyn/a
Total Radiative Power16.80 MW
Map:
Additional Information
Notification Status New Feature
Type of EventNominal Fire Risk
Event Priority Ranking4
Maximum Observed BT (3.9 um)308.19 K
Observed - Background BT (3.9 um)4.42 K
BT Anomaly (3.9 um)4.54 K
Maximum Observed - Clear RTM BT (3.9 um)17.76 K
Maximum Observed BTD (3.9-10/11/12 um)15.25 K
Observed - Background BTD (3.9-10/11/12 um)2.95 K
BTD Anomaly (3.9-10/11/12 um)4.49 K
Similar Pixel Count25
BT Time Tendency (3.9 um)1.70 K
Image Interval5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder0.98
Fraction of Surrounding Red Channel Pixels that are Brighter0.98
Maximum Radiative Power16.80 MW
Maximum Radiative Power Uncertainty0.00 MW
Total Radiative Power Uncertainty0.00 MW
Mean Viewing Angle 57.70°
Mean Solar Zenith Angle 35.60°
Mean Glint Angle89.80°
Water Fraction0.00
Total Pixel Area 7.50 km2
Latest Satellite Imagery:
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Possible Wildfire

Basic Information
State/Province(s) MT
Country/Countries United States
County/Locality(s) Missoula County, MT
NWS WFO Missoula MT
Identification MethodEnhanced Contextual (Clear)
Mean Object Date/Time2026-04-21 19:41:23UTC
Radiative Center (Lat, Lon): 46.926109°, -113.668610°
Nearby Counties (meeting notification criteria):
  • Missoula County (0.00 km)
Total Radiative Power Anomalyn/a
Total Radiative Power21.85 MW
Map:
Additional Information
Notification Status New Feature
Type of EventNominal Fire Risk, Known Incident: RX D3 Lower Blackfoot Corridor F4 (HIGH, tdiff=0.85869 days, Poin
Event Priority Ranking4
Maximum Observed BT (3.9 um)306.88 K
Observed - Background BT (3.9 um)4.40 K
BT Anomaly (3.9 um)2.79 K
Maximum Observed - Clear RTM BT (3.9 um)11.72 K
Maximum Observed BTD (3.9-10/11/12 um)12.33 K
Observed - Background BTD (3.9-10/11/12 um)4.07 K
BTD Anomaly (3.9-10/11/12 um)5.06 K
Similar Pixel Count12
BT Time Tendency (3.9 um)2.90 K
Image Interval5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder0.73
Fraction of Surrounding Red Channel Pixels that are Brighter0.44
Maximum Radiative Power21.85 MW
Maximum Radiative Power Uncertainty0.00 MW
Total Radiative Power Uncertainty0.00 MW
Mean Viewing Angle 58.90°
Mean Solar Zenith Angle 35.40°
Mean Glint Angle91.20°
Water Fraction0.00
Total Pixel Area 7.70 km2
Latest Satellite Imagery:
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Possible Wildfire

Basic Information
State/Province(s) WA
Country/Countries United States
County/Locality(s) Columbia County, WA
NWS WFO Pendleton OR
Identification MethodEnhanced Contextual (Cloud)
Mean Object Date/Time2026-04-21 19:41:23UTC
Radiative Center (Lat, Lon): 46.233055°, -118.053886°
Nearby Counties (meeting notification criteria):
  • Columbia County (0.00 km)
Total Radiative Power Anomalyn/a
Total Radiative Power236.83 MW
Map:
Additional Information
Notification Status New Feature
Type of EventNominal Fire Risk
Event Priority Ranking4
Maximum Observed BT (3.9 um)323.38 K
Observed - Background BT (3.9 um)24.69 K
BT Anomaly (3.9 um)7.63 K
Maximum Observed - Clear RTM BT (3.9 um)32.74 K
Maximum Observed BTD (3.9-10/11/12 um)34.80 K
Observed - Background BTD (3.9-10/11/12 um)24.18 K
BTD Anomaly (3.9-10/11/12 um)8.94 K
Similar Pixel Count0
BT Time Tendency (3.9 um)22.70 K
Image Interval5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder0.84
Fraction of Surrounding Red Channel Pixels that are Brighter0.83
Maximum Radiative Power149.30 MW
Maximum Radiative Power Uncertainty0.00 MW
Total Radiative Power Uncertainty0.00 MW
Mean Viewing Angle 56.70°
Mean Solar Zenith Angle 34.80°
Mean Glint Angle87.90°
Water Fraction0.00
Total Pixel Area 14.60 km2
Latest Satellite Imagery:
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