Alert archive / Wyoming / Red Flag Warnings in 2021
Red Flag Warning 15, NWS Cheyenne, WY
NWS Cheyenne, WY issued this red flag warning at Aug 5, 2021, 2:07 PM MDT. It took effect at Aug 6, 2021, 11:00 AM MDT. It was in force for 9 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
- Aug 5, 2021, 2:07 PM MDT (20:07 UTC)
- In effect from
- Aug 6, 2021, 11:00 AM MDT
- Expired
- Aug 6, 2021, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Cheyenne, WY
The text
As transmitted.
918 WWUS85 KCYS 052007 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 207 PM MDT Thu Aug 5 2021 ...RED FLAG WARNING FOR MUCH OF SOUTHEAST WYOMING FRIDAY FOR GUSTY WINDS...LOW HUMIDITY AND POSSIBLE DRY THUNDERSTORMS... ...FIRE WEATHER WATCH FOR THE NEBRASKA PANHANDLE ON FRIDAY FOR GUSTY WINDS...LOW HUMIDITY AND POSSIBLE DRY THUNDERSTORMS... WYZ301-304-308-310-061100- /O.UPG.KCYS.FW.A.0013.210806T1700Z-210807T0200Z/ /O.NEW.KCYS.FW.W.0015.210806T1700Z-210807T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland-Southwest Carbon County-Laramie Valley/Shirley Basin- Platte/Goshen/Central and Eastern Laramie- 207 PM MDT Thu Aug 5 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT FRIDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONES 301, 304, 308, AND 310... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM MDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zone 301...304...308 AND 310. * WIND...Southwest 20 to 25 mph sustained with gusts to 40 mph during the afternoon. * HUMIDITY...12 to 15 percent. * HAINES...5 * THUNDERSTORMS...Widely scattered to scattered dry thunderstorms possible. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ NEZ311>313-061100- /O.NEW.KCYS.FW.A.0014.210806T1700Z-210807T0200Z/ Pine Ridge/Nebraska National Forest/Oglala National Grasslands- Box Butte/South Sioux- Scotts Bluff National Monument/Wildcat Hills- 207 PM MDT Thu Aug 5 2021 ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONES 311, 312, AND 313... The National Weather Service in Cheyenne has issued a Fire Weather Watch, which is in effect from Friday morning through Friday evening. * AFFECTED AREA...Fire weather zone 311. Fire weather zone 312. Fire weather zone 313. * WIND...West to northwest winds at 15 to 25 mph. * HUMIDITY...15 to 20 percent * HAINES...5 * THUNDERSTORMS...Widely scattered thunderstorms are possible. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions may develop. Listen for later forecasts and possible Red Flag Warnings. && $$
3 follow-up statements
662 WWUS85 KCYS 060901 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 301 AM MDT Fri Aug 6 2021 ...RED FLAG WARNING FOR MUCH OF SOUTHEAST WYOMING FRIDAY FOR GUSTY WINDS...LOW HUMIDITY AND POSSIBLE DRY THUNDERSTORMS... NEZ311-312-061015- /O.CAN.KCYS.FW.A.0014.210806T1700Z-210807T0200Z/ Pine Ridge/Nebraska National Forest/Oglala National Grasslands- Box Butte/South Sioux- 301 AM MDT Fri Aug 6 2021 ...FIRE WEATHER WATCH IS CANCELLED FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONES 311 AND 312... The National Weather Service in Cheyenne has cancelled the Fire Weather Watch. Humidity is expected to remain above critical levels for the northern Nebraska Panhandle. Therefore...the Fire Weather Watch has been cancelled. $$ NEZ313-070000- /O.UPG.KCYS.FW.A.0014.210806T1700Z-210807T0200Z/ /O.EXA.KCYS.FW.W.0015.210806T1700Z-210807T0200Z/ Scotts Bluff National Monument/Wildcat Hills- 301 AM MDT Fri Aug 6 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 313... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM this morning to 8 PM MDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zone 313. * WIND...West to northwest winds at 15 to 25 mph. * HUMIDITY...12 to 15 percent * HAINES...5 * THUNDERSTORMS...Widely scattered thunderstorms are possible this afternoon. They will be high based and will produce strong downburst winds and little rainfall. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ WYZ301-304-308-310-070000- /O.CON.KCYS.FW.W.0015.210806T1700Z-210807T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland-Southwest Carbon County-Laramie Valley/Shirley Basin- Platte/Goshen/Central and Eastern Laramie- 301 AM MDT Fri Aug 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONES 301, 304, 308, AND 310... * AFFECTED AREA...Fire weather zone 301...304...308 AND 310. * WIND...Southwest 20 to 25 mph sustained with gusts to 40 mph during the afternoon. * HUMIDITY...12 to 15 percent. * HAINES...5 * THUNDERSTORMS...Widely scattered to scattered dry thunderstorms possible. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$
979 WWUS85 KCYS 062124 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 324 PM MDT Fri Aug 6 2021 ...RED FLAG WARNING FOR MUCH OF SOUTHEAST WYOMING FRIDAY FOR GUSTY WINDS...LOW HUMIDITY AND POSSIBLE DRY THUNDERSTORMS... WYZ301-304-308-310-070200- /O.CON.KCYS.FW.W.0015.000000T0000Z-210807T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland-Southwest Carbon County-Laramie Valley/Shirley Basin- Platte/Goshen/Central and Eastern Laramie- 324 PM MDT Fri Aug 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONES 301, 304, 308, AND 310... * AFFECTED AREA...Fire weather zone 301...304...308 AND 310. * WIND...Southwest 20 to 25 mph sustained with gusts to 40 mph during the afternoon. * HUMIDITY...12 to 15 percent. * HAINES...5 * THUNDERSTORMS...Widely scattered to scattered dry thunderstorms possible. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ NEZ313-070200- /O.CON.KCYS.FW.W.0015.000000T0000Z-210807T0200Z/ Scotts Bluff National Monument/Wildcat Hills- 324 PM MDT Fri Aug 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 313... * AFFECTED AREA...Fire weather zone 313. * WIND...West to northwest winds at 15 to 25 mph. * HUMIDITY...12 to 15 percent * HAINES...5 * THUNDERSTORMS...Widely scattered thunderstorms are possible this afternoon. They will be high based and will produce strong downburst winds and little rainfall. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$
545 WWUS85 KCYS 070148 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 748 PM MDT Fri Aug 6 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 301, 304, 308, 310, AND 313... WYZ301-304-308-310-070300- /O.EXP.KCYS.FW.W.0015.000000T0000Z-210807T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland-Southwest Carbon County-Laramie Valley/Shirley Basin- Platte/Goshen/Central and Eastern Laramie- 748 PM MDT Fri Aug 6 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 301, 304, 308, AND 310... Winds are still gusty from thunderstorms in the area, but the humidity has come up also due to these thunderstorms, bringing it above critical levels. Therefore, the Red Flag Warning has been cancelled. $$ NEZ313-070300- /O.EXP.KCYS.FW.W.0015.000000T0000Z-210807T0200Z/ Scotts Bluff National Monument/Wildcat Hills- 748 PM MDT Fri Aug 6 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 313... Winds are still gusty from thunderstorms in the area, but the humidity has come up also due to these thunderstorms, bringing it above critical levels. Therefore, the Red Flag Warning has been cancelled. $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 2:04 AM MDT | Fire Weather Watch | CYS | 12 hr | |
| Aug 5, 2:07 PM MDT | Fire Weather Watch | CYS | 13 hr |
Nearby
Red Flag Warnings in Wyoming, 2021Red Flag Warnings in Nebraska, 2021Every red flag warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.