Next Generation Fire System (NGFS) - Experimental ; CIMSS

Date:	2025-06-21
Time:	20:30:23
Production Date and Time:	2025-06-21 20:42:01 UTC
Primary Instrument:	GOES-18 ABI
Wmo Spacecraft Id:	665
Location/orbit:	GEO
L1 File:	OR_ABI-L1b-RadF-M6C14_G18_s20251722030238_e20251722039546_c20251722040009.nc
L1 File(s) - Temporal	OR_ABI-L1b-RadF-M6C14_G18_s20251722020238_e20251722029546_c20251722030010.nc
Number Of Thermal Anomaly Alerts:	3

Basic Information
State/Province(s)	AK
Country/Countries	United States
County/Locality(s)	Yukon-Koyukuk Census Area, AK
NWS WFO	Unknown
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2025-06-21 20:30:26UTC
Radiative Center (Lat, Lon):	67.371666°, -144.692215°
Nearby Counties (meeting alert criteria):	Yukon-Koyukuk Census Area (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	104.51 MW
Map:
Additional Information
Alert Status	New Feature
Type of Event	Nominal Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	299.27 K
Observed - Background BT (3.9 um)	4.19 K
BT Anomaly (3.9 um)	5.15 K
Maximum Observed - Clear RTM BT (3.9 um)	10.34 K
Maximum Observed BTD (3.9-10/11/12 um)	15.70 K
Observed - Background BTD (3.9-10/11/12 um)	3.94 K
BTD Anomaly (3.9-10/11/12 um)	3.50 K
Similar Pixel Count	21
BT Time Tendency (3.9 um)	4.10 K
Image Interval	10.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.61
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	52.97 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	76.80°
Mean Solar Zenith Angle	45.20°
Mean Glint Angle	120.60°
Water Fraction	0.00
Total Pixel Area	35.00 km²
Latest Satellite Imagery:	Alaska_C_750_m Alaska_EC_750_m Alaska_Full_1750_m Alaska_SC_750_m Alaska_SE_750_m Alaska_SW_750_m Alaska_WC_750_m
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Basic Information
State/Province(s)	AK
Country/Countries	United States
County/Locality(s)	Yukon-Koyukuk Census Area, AK
NWS WFO	Unknown
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2025-06-21 20:30:26UTC
Radiative Center (Lat, Lon):	65.375000°, -146.739166°
Nearby Counties (meeting alert criteria):	Yukon-Koyukuk Census Area (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	23.65 MW
Map:
Additional Information
Alert Status	New Feature
Type of Event	Nominal Risk
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	299.10 K
Observed - Background BT (3.9 um)	2.74 K
BT Anomaly (3.9 um)	2.00 K
Maximum Observed - Clear RTM BT (3.9 um)	10.06 K
Maximum Observed BTD (3.9-10/11/12 um)	12.41 K
Observed - Background BTD (3.9-10/11/12 um)	2.44 K
BTD Anomaly (3.9-10/11/12 um)	3.98 K
Similar Pixel Count	25
BT Time Tendency (3.9 um)	1.00 K
Image Interval	10.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.64
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	23.65 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	74.80°
Mean Solar Zenith Angle	43.80°
Mean Glint Angle	117.00°
Water Fraction	0.00
Total Pixel Area	15.30 km²
Latest Satellite Imagery:	Alaska_C_750_m Alaska_EC_750_m Alaska_Full_1750_m Alaska_SC_750_m Alaska_SE_750_m Alaska_SW_750_m Alaska_WC_750_m
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Basic Information
State/Province(s)	AK
Country/Countries	United States
County/Locality(s)	Southeast Fairbanks Census Area, AK
NWS WFO	Unknown
Identification Method	Enhanced Contextual (Clear)
Mean Object Date/Time	2025-06-21 20:30:26UTC
Radiative Center (Lat, Lon):	63.548611°, -143.706940°
Nearby Counties (meeting alert criteria):	Southeast Fairbanks Census Area (0.00 km)
Total Radiative Power Anomaly	n/a
Total Radiative Power	43.71 MW
Map:
Additional Information
Alert Status	New Feature
Type of Event	Nominal Risk, Known Incident: Lake Mansfield (HIGH, tdiff=0.58462 days, Point)
Event Priority Ranking	4
Maximum Observed BT (3.9 um)	302.80 K
Observed - Background BT (3.9 um)	4.76 K
BT Anomaly (3.9 um)	4.25 K
Maximum Observed - Clear RTM BT (3.9 um)	9.64 K
Maximum Observed BTD (3.9-10/11/12 um)	12.57 K
Observed - Background BTD (3.9-10/11/12 um)	4.47 K
BTD Anomaly (3.9-10/11/12 um)	5.74 K
Similar Pixel Count	17
BT Time Tendency (3.9 um)	5.20 K
Image Interval	10.00 minutes
Fraction of Surrounding LWIR Pixels that are Colder	0.83
Fraction of Surrounding Red Channel Pixels that are Brighter	1.00
Maximum Radiative Power	43.71 MW
Maximum Radiative Power Uncertainty	0.00 MW
Total Radiative Power Uncertainty	0.00 MW
Mean Viewing Angle	72.60°
Mean Solar Zenith Angle	41.50°
Mean Glint Angle	112.70°
Water Fraction	0.00
Total Pixel Area	13.40 km²
Latest Satellite Imagery:	Alaska_C_750_m Alaska_EC_750_m Alaska_Full_1750_m Alaska_SC_750_m Alaska_SE_750_m
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Next Generation Fire System (NGFS) - Experimental