Next Generation Fire System (NGFS) - Experimental ; CIMSS

Date:	2026-04-21
Time:	17:31:17
Production Date and Time:	2026-04-21 17:36:59 UTC
Primary Instrument:	GOES-19 ABI
Wmo Spacecraft Id:	666
Location/orbit:	GEO
L1 File:	OR_ABI-L1b-RadC-M6C14_G19_s20261111731177_e20261111733550_c20261111734034.nc
L1 File(s) - Temporal	OR_ABI-L1b-RadC-M6C14_G19_s20261111726177_e20261111728550_c20261111729041.nc,OR_ABI-L1b-RadC-M6C14_G19_s20261111721177_e20261111723550_c20261111724029.nc
Number Of Thermal Anomaly Notifications:	9

Possible Wildfire

Basic Information
State/Province(s)	MT
Country/Countries	United States
County/Locality(s)	Judith Basin County, MT
NWS WFO	Great Falls MT
Identification Method	Enhanced Contextual (Cloud)
Mean Object Date/Time	2026-04-21 17:31:19UTC
Radiative Center (Lat, Lon):	46.991112°, -110.051941°
Nearby Counties (meeting notification criteria):	Judith Basin County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	311.89 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	318.00 K
Observed - Background BT (3.9 um)	11.35 K
BT Anomaly (3.9 um)	8.83 K
Maximum Observed - Clear RTM BT (3.9 um)	23.84 K
Maximum Observed BTD (3.9-10/11/12 um)	19.59 K
Observed - Background BTD (3.9-10/11/12 um)	10.74 K
BTD Anomaly (3.9-10/11/12 um)	26.49 K
Similar Pixel Count	0
BT Time Tendency (3.9 um)	10.30 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.75
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	84.41 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	64.20°
Mean Solar Zenith Angle	42.10°
Mean Glint Angle	106.20°
Water Fraction	0.00
Total Pixel Area	36.80 km²
Latest Satellite Imagery:	MTe_750_m
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Possible Wildfire

Basic Information
State/Province(s)	MN
Country/Countries	United States
County/Locality(s)	Swift County, MN
NWS WFO	Twin Cities/Chanhassen MN
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2026-04-21 17:31:20UTC
Radiative Center (Lat, Lon):	45.279724°, -95.716667°
Nearby Counties (meeting notification criteria):	Swift County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	27.01 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	314.31 K
Observed - Background BT (3.9 um)	3.47 K
BT Anomaly (3.9 um)	2.50 K
Maximum Observed - Clear RTM BT (3.9 um)	17.50 K
Maximum Observed BTD (3.9-10/11/12 um)	15.93 K
Observed - Background BTD (3.9-10/11/12 um)	4.56 K
BTD Anomaly (3.9-10/11/12 um)	6.40 K
Similar Pixel Count	22
BT Time Tendency (3.9 um)	2.90 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.10
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	27.01 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	56.30°
Mean Solar Zenith Angle	35.40°
Mean Glint Angle	91.50°
Water Fraction	0.00
Total Pixel Area	7.20 km²
Latest Satellite Imagery:	MN-WInw_750_m
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Possible Wildfire

Basic Information
State/Province(s)	SD
Country/Countries	United States
County/Locality(s)	Clark County, SD
NWS WFO	Aberdeen SD
Identification Method	Enhanced Contextual (Cloud)
Mean Object Date/Time	2026-04-21 17:31:20UTC
Radiative Center (Lat, Lon):	45.126110°, -97.679443°
Nearby Counties (meeting notification criteria):	Clark County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	132.08 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk, Known Incident: Lynbye GPA RX (HIGH, tdiff=0.90991 days, Point)
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	318.25 K
Observed - Background BT (3.9 um)	10.13 K
BT Anomaly (3.9 um)	6.59 K
Maximum Observed - Clear RTM BT (3.9 um)	22.50 K
Maximum Observed BTD (3.9-10/11/12 um)	22.39 K
Observed - Background BTD (3.9-10/11/12 um)	9.75 K
BTD Anomaly (3.9-10/11/12 um)	8.83 K
Similar Pixel Count	0
BT Time Tendency (3.9 um)	10.10 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.87
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	67.34 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	56.90°
Mean Solar Zenith Angle	35.80°
Mean Glint Angle	92.50°
Water Fraction	0.00
Total Pixel Area	14.60 km²
Latest Satellite Imagery:	MN-WInw_750_m ND-SDn_750_m
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Possible Wildfire

Basic Information
State/Province(s)	MN
Country/Countries	United States
County/Locality(s)	Dodge County, MN
NWS WFO	La Crosse WI
Identification Method	Enhanced Contextual (Cloud)
Mean Object Date/Time	2026-04-21 17:31:21UTC
Radiative Center (Lat, Lon):	44.047501°, -92.714447°
Nearby Counties (meeting notification criteria):	Dodge County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	66.28 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	321.34 K
Observed - Background BT (3.9 um)	11.19 K
BT Anomaly (3.9 um)	4.91 K
Maximum Observed - Clear RTM BT (3.9 um)	27.84 K
Maximum Observed BTD (3.9-10/11/12 um)	25.05 K
Observed - Background BTD (3.9-10/11/12 um)	11.28 K
BTD Anomaly (3.9-10/11/12 um)	7.21 K
Similar Pixel Count	0
BT Time Tendency (3.9 um)	9.10 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.38
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	66.28 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	54.00°
Mean Solar Zenith Angle	33.50°
Mean Glint Angle	87.30°
Water Fraction	0.00
Total Pixel Area	6.80 km²
Latest Satellite Imagery:	MNs-IA-MOnw-NEe_750_m
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Possible Wildfire

Basic Information
State/Province(s)	WI
Country/Countries	United States
County/Locality(s)	Vernon County, WI
NWS WFO	La Crosse WI
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2026-04-21 17:31:21UTC
Radiative Center (Lat, Lon):	43.582779°, -90.690277°
Nearby Counties (meeting notification criteria):	Vernon County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	49.68 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	310.11 K
Observed - Background BT (3.9 um)	6.28 K
BT Anomaly (3.9 um)	8.77 K
Maximum Observed - Clear RTM BT (3.9 um)	19.34 K
Maximum Observed BTD (3.9-10/11/12 um)	14.90 K
Observed - Background BTD (3.9-10/11/12 um)	5.78 K
BTD Anomaly (3.9-10/11/12 um)	14.01 K
Similar Pixel Count	5
BT Time Tendency (3.9 um)	4.70 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.92
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	26.29 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	52.90°
Mean Solar Zenith Angle	32.70°
Mean Glint Angle	85.30°
Water Fraction	0.00
Total Pixel Area	13.30 km²
Latest Satellite Imagery:	MNs-IA-MOnw-NEe_750_m WIs-ILn-MIw-INn_750_m
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Possible Wildfire

Basic Information
State/Province(s)	WI
Country/Countries	United States
County/Locality(s)	Washington County, WI
NWS WFO	Milwaukee/Sullivan WI
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2026-04-21 17:31:21UTC
Radiative Center (Lat, Lon):	43.387501°, -88.337219°
Nearby Counties (meeting notification criteria):	Washington County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	10.11 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	303.24 K
Observed - Background BT (3.9 um)	2.44 K
BT Anomaly (3.9 um)	2.55 K
Maximum Observed - Clear RTM BT (3.9 um)	13.65 K
Maximum Observed BTD (3.9-10/11/12 um)	12.85 K
Observed - Background BTD (3.9-10/11/12 um)	2.37 K
BTD Anomaly (3.9-10/11/12 um)	5.55 K
Similar Pixel Count	25
BT Time Tendency (3.9 um)	1.00 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.49
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	10.11 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	52.00°
Mean Solar Zenith Angle	32.10°
Mean Glint Angle	83.90°
Water Fraction	0.00
Total Pixel Area	6.50 km²
Latest Satellite Imagery:	WIs-ILn-MIw-INn_750_m
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Possible Wildfire

Basic Information
State/Province(s)	IA
Country/Countries	United States
County/Locality(s)	Fayette County, IA
NWS WFO	La Crosse WI
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2026-04-21 17:31:51UTC
Radiative Center (Lat, Lon):	42.914722°, -91.804443°
Nearby Counties (meeting notification criteria):	Fayette County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	28.57 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	311.29 K
Observed - Background BT (3.9 um)	2.91 K
BT Anomaly (3.9 um)	1.44 K
Maximum Observed - Clear RTM BT (3.9 um)	18.03 K
Maximum Observed BTD (3.9-10/11/12 um)	14.63 K
Observed - Background BTD (3.9-10/11/12 um)	2.78 K
BTD Anomaly (3.9-10/11/12 um)	2.13 K
Similar Pixel Count	24
BT Time Tendency (3.9 um)	1.50 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.60
Fraction of Surrounding Red Channel Pixels that are Brighter	0.99
Maximum Radiative Power	28.57 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	52.60°
Mean Solar Zenith Angle	32.20°
Mean Glint Angle	84.60°
Water Fraction	0.00
Total Pixel Area	13.20 km²
Latest Satellite Imagery:	MNs-IA-MOnw-NEe_750_m
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Possible Wildfire

Basic Information
State/Province(s)	IA
Country/Countries	United States
County/Locality(s)	Johnson County, IA
NWS WFO	Quad Cities IL
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2026-04-21 17:31:51UTC
Radiative Center (Lat, Lon):	41.691944°, -91.452499°
Nearby Counties (meeting notification criteria):	Johnson County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	14.02 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	309.84 K
Observed - Background BT (3.9 um)	2.82 K
BT Anomaly (3.9 um)	1.34 K
Maximum Observed - Clear RTM BT (3.9 um)	17.70 K
Maximum Observed BTD (3.9-10/11/12 um)	16.89 K
Observed - Background BTD (3.9-10/11/12 um)	2.66 K
BTD Anomaly (3.9-10/11/12 um)	1.21 K
Similar Pixel Count	23
BT Time Tendency (3.9 um)	2.70 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.56
Fraction of Surrounding Red Channel Pixels that are Brighter	0.98
Maximum Radiative Power	14.02 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	51.20°
Mean Solar Zenith Angle	31.00°
Mean Glint Angle	82.00°
Water Fraction	0.00
Total Pixel Area	6.40 km²
Latest Satellite Imagery:	MNs-IA-MOnw-NEe_750_m
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Possible Wildfire

Basic Information
State/Province(s)	NE
Country/Countries	United States
County/Locality(s)	Washington County, NE
NWS WFO	Omaha/Valley NE
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2026-04-21 17:31:50UTC
Radiative Center (Lat, Lon):	41.418056°, -95.993057°
Nearby Counties (meeting notification criteria):	Washington County (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	23.53 MW
Map:
Additional Information
Notification Status	New Feature
Type of Event	Nominal Fire Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	313.94 K
Observed - Background BT (3.9 um)	4.10 K
BT Anomaly (3.9 um)	2.60 K
Maximum Observed - Clear RTM BT (3.9 um)	13.51 K
Maximum Observed BTD (3.9-10/11/12 um)	16.30 K
Observed - Background BTD (3.9-10/11/12 um)	4.72 K
BTD Anomaly (3.9-10/11/12 um)	3.25 K
Similar Pixel Count	16
BT Time Tendency (3.9 um)	2.30 K
Image Interval	5.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.28
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	23.53 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	52.60°
Mean Solar Zenith Angle	31.90°
Mean Glint Angle	84.40°
Water Fraction	0.00
Total Pixel Area	6.60 km²
Latest Satellite Imagery:	MNs-IA-MOnw-NEe_750_m
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Next Generation Fire System (NGFS) - Experimental

Wildfire Notification Report

Possible Wildfire

Possible Wildfire

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