Alert archive / Nebraska / Red Flag Warnings in 2025
Red Flag Warning 21, NWS Cheyenne, WY
NWS Cheyenne, WY issued this red flag warning at Dec 18, 2025, 3:04 AM MST for Banner County, Cheyenne County, Kimball County, Nebraska; Laramie County, Wyoming. It took effect at Dec 18, 2025, 5:00 AM MST. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 18, 2025, 3:04 AM MST (10:04 UTC)
- In effect from
- Dec 18, 2025, 5:00 AM MST
- Expired
- Dec 18, 2025, 5:00 PM MST
- In force
- 12 hr
- Issued by
- NWS Cheyenne, WY
Counties Banner County, NE, Cheyenne County, NE, Kimball County, NE, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 88 km from the middle of the area, began a volume at 10:05 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 10.1 hours before the alert went out and 315 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2242 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 260 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
752 WWUS85 KCYS 181004 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 304 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA PANHANDLE... ...FIRE WEATHER WATCH IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH PLAINS... NEZ437-WYZ430-431-190000- /O.NEW.KCYS.FW.W.0021.251218T1200Z-251218T1800Z/ /O.NEW.KCYS.FW.A.0013.251219T1700Z-251220T0600Z/ Lodgepole Creek/Southern Nebraska Panhandle- Laramie Foothills and High Plains-Laramie East High Plains- 304 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT UNTIL 11 AM MST THIS MORNING FOR LOW RH AND STRONG WINDS FOR FIRE WEATHER ZONES 430, 431, AND 437... ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR LOW RH AND VERY STRONG WINDS FOR FIRE WEATHER ZONES 430, 431, AND 437... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect until 11 AM MST this morning. a Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from Friday morning through Friday evening. * AFFECTED AREA...Fire weather zones 430, 431 and 437. * WIND...For the Red Flag Warning - Gusts 40 to 60 mph. For the Fire Weather Watch - Gusts 50 to 70 mph. * HUMIDITY...For the Red Flag Warning - RH values of 20 to 25%. For the Fire Weather Watch - RH values of 15 to 20%. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ NEZ436-WYZ432-433-190000- /O.NEW.KCYS.FW.A.0013.251219T1700Z-251220T0600Z/ Lower North Platte River Basin/Scottsbluff National Monument- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 304 AM MST Thu Dec 18 2025 ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR LOW RH AND VERY STRONG WINDS FOR FIRE WEATHER ZONES 432, 433, AND 436... The National Weather Service in Cheyenne has issued a Fire Weather Watch, which is in effect from Friday morning through Friday evening. * AFFECTED AREA...Fire weather zones 432, 433, and 436. * WIND...Gusts 50 to 75 mph. * HUMIDITY...RH values of 15 to 20%. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
3 follow-up statements
398 WWUS85 KCYS 181107 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 407 AM MST Thu Dec 18 2025 ...CORRECTION FOR EXPIRATION OF RED FLAG WARNING... ...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA PANHANDLE... ...FIRE WEATHER WATCH IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH PLAINS... NEZ437-WYZ430-431-190000- /O.EXT.KCYS.FW.W.0021.251218T1200Z-251219T0000Z/ /O.CON.KCYS.FW.A.0013.251219T1700Z-251220T0600Z/ Lodgepole Creek/Southern Nebraska Panhandle- Laramie Foothills and High Plains-Laramie East High Plains- 407 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR LOW RH AND STRONG WINDS FOR FIRE WEATHER ZONES 430, 431, AND 437... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR LOW RH AND VERY STRONG WINDS FOR FIRE WEATHER ZONES 430, 431, AND 437... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect until 5 PM MST this morning. a Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from Friday morning through Friday evening. * AFFECTED AREA...Fire weather zones 430, 431 and 437. * WIND...For the Red Flag Warning - Gusts 40 to 60 mph. For the Fire Weather Watch - Gusts 50 to 70 mph. * HUMIDITY...For the Red Flag Warning - RH values of 20 to 25%. For the Fire Weather Watch - RH values of 15 to 20%. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ NEZ436-WYZ432-433-190000- /O.CON.KCYS.FW.A.0013.251219T1700Z-251220T0600Z/ Lower North Platte River Basin/Scottsbluff National Monument- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 407 AM MST Thu Dec 18 2025 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR LOW RH AND VERY STRONG WINDS FOR FIRE WEATHER ZONES 432, 433, AND 436... * AFFECTED AREA...Fire weather zones 432, 433, and 436. * WIND...Gusts 50 to 75 mph. * HUMIDITY...RH values of 15 to 20%. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
096 WWUS85 KCYS 181748 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 1048 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA PANHANDLE... ...RED FLAG WARNING NOW IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH PLAINS... NEZ437-WYZ430-431-191200- /O.UPG.KCYS.FW.A.0013.251219T1700Z-251220T0600Z/ /O.NEW.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/ /O.CON.KCYS.FW.W.0021.000000T0000Z-251219T0000Z/ Lodgepole Creek/Southern Nebraska Panhandle- Laramie Foothills and High Plains-Laramie East High Plains- 1048 AM MST Thu Dec 18 2025 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR LOW RH AND STRONG WINDS FOR FIRE WEATHER ZONES 430, 431, AND 437... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 11 PM MST FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 10 AM to 11 PM MST Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zones 430, 431 and 437. * WIND...For today - Gusts 40 to 60 mph. For tomorrow - Gusts 50 to 70 mph. * HUMIDITY...For today - RH values of 20 to 25%. For tomorrow - RH values of 15 to 20%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ NEZ436-WYZ432-433-191200- /O.UPG.KCYS.FW.A.0013.251219T1700Z-251220T0600Z/ /O.NEW.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/ Lower North Platte River Basin/Scottsbluff National Monument- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 1048 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 11 PM MST FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY.... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 10 AM to 11 PM MST Friday. The Fire Weather Watch is no longer in effect. * WIND...Gusts 50 to 75 mph. * HUMIDITY...RH values of 15 to 20%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ NEZ434-435-WYZ417-418-191200- /O.NEW.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/ Pine Ridge/Nebraska National Forest- Box Butte/South Sioux/Niobrara River- Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- 1048 AM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 11 PM MST FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 10 AM to 11 PM MST Friday. * AFFECTED AREA...Fire weather zones 434, 435, 417, 418. * WIND...Gusts 40 to 60 mph. * HUMIDITY...RH values 15 to 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
426 WWUS85 KCYS 182347 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 447 PM MST Thu Dec 18 2025 ...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA PANHANDLE... ...RED FLAG WARNING NOW IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH PLAINS... NEZ437-WYZ430-431-191200- /O.EXP.KCYS.FW.W.0021.000000T0000Z-251219T0000Z/ /O.CON.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/ Lodgepole Creek/Southern Nebraska Panhandle- Laramie Foothills and High Plains-Laramie East High Plains- 447 PM MST Thu Dec 18 2025 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 11 PM MST FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 430, 431, AND 437... ...RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR GUSTY WINDS AND LOW Humidity FOR FIRE WEATHER ZONES 430, 431, AND 437... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 10 AM to 11 PM MST Friday. * AFFECTED AREA...Fire weather zones 430, 431 and 437. * WIND...For today - Gusts 40 to 60 mph. For tomorrow - Gusts 50 to 70 mph. * HUMIDITY...RH values of 15 to 20%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ NEZ434>436-WYZ417-418-432-433-191200- /O.CON.KCYS.FW.W.0022.251219T1700Z-251220T0600Z/ Pine Ridge/Nebraska National Forest- Box Butte/South Sioux/Niobrara River- Lower North Platte River Basin/Scottsbluff National Monument- Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- Bordeaux/Chugwater/Wheatland-Goshen/Middle- Lower North Platte River Basin- 447 PM MST Thu Dec 18 2025 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 11 PM MST FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 417, 418, 432, 433, 434, 435, AND 436... * AFFECTED AREA...Fire weather zones 434, 435, 417, 418. * WIND...Gusts 40 to 60 mph. * HUMIDITY...RH values 15 to 30%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Although conditions will be borderline, a lack of significant precipitation combined with the high winds in the region will create a critical fire weather environment. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 3:04 AM MST | Fire Weather Watch | CYS | Banner, Cheyenne, Kimball, Morrill, Scotts Bluff, Sioux | 8 hr |
| Dec 18, 10:16 AM MST | High Wind Warning | CYS | Banner, Box Butte, Dawes, Kimball, Scotts Bluff, Sioux | 46 hr |
| Dec 18, 10:48 AM MST | Red Flag Warning | CYS | Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more | 37 hr |
| Dec 17, 5:22 PM MST | Snow Squall Warning | CYS | Albany, Laramie | 53 min |
Nearby
Red Flag Warnings in Nebraska, 2025Red Flag Warnings in Wyoming, 2025Every red flag warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.