Alert archive / Wyoming / Red Flag Warnings in 2021
Red Flag Warning 17, NWS Cheyenne, WY
NWS Cheyenne, WY issued this red flag warning at Aug 10, 2021, 3:55 AM MDT. It took effect at Aug 10, 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 10, 2021, 3:55 AM MDT (09:55 UTC)
- In effect from
- Aug 10, 2021, 11:00 AM MDT
- Expired
- Aug 10, 2021, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Cheyenne, WY
The text
As transmitted.
747 WWUS85 KCYS 100955 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 355 AM MDT Tue Aug 10 2021 ...RED FLAG WARNING LATE THIS MORNING THROUGH EARLY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 301... 302...304... 305...307...308 AND 310... WYZ301-302-304-305-307-308-310-102200- /O.UPG.KCYS.FW.A.0016.210810T1700Z-210811T0200Z/ /O.NEW.KCYS.FW.W.0017.210810T1700Z-210811T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland-North Laramie Range/Medicine Bow NF- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Snowy Range/Medicine Bow NF-Laramie Valley/Shirley Basin- Platte/Goshen/Central and Eastern Laramie- 355 AM MDT Tue Aug 10 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 301, 302, 304, 305, 307, 308, AND 310... 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 The Fire Weather Watch is no longer in effect. * WIND...WEST WINDS AT 15 TO 25 MPH WITH GUSTS TO 30 MPH. * HUMIDITY...LOW HUMIDITY 10 TO 15 PERCENT. * HAINES...5 OR 6 * 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. && $$
2 follow-up statements
653 WWUS85 KCYS 102029 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 229 PM MDT Tue Aug 10 2021 ...RED FLAG WARNING LATE THIS MORNING THROUGH EARLY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 301... 302... 304... 305...307...308 AND 310... WYZ301-302-304-305-307-308-310-110200- /O.CON.KCYS.FW.W.0017.000000T0000Z-210811T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland-North Laramie Range/Medicine Bow NF- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Snowy Range/Medicine Bow NF-Laramie Valley/Shirley Basin- Platte/Goshen/Central and Eastern Laramie- 229 PM MDT Tue Aug 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 301, 302, 304, 305, 307, 308, AND 310... * WIND...WEST WINDS AT 15 TO 25 MPH WITH GUSTS TO 30 MPH. * HUMIDITY...LOW HUMIDITY 10 TO 15 PERCENT. * HAINES...5 OR 6 * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
110 WWUS85 KCYS 110148 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 748 PM MDT Tue Aug 10 2021 ...RED FLAG WARNINGS ALLOWED TO EXPIRE ON TIME AT 8 PM THIS EVENING... WYZ301-302-304-305-307-308-310-110300- /O.EXP.KCYS.FW.W.0017.000000T0000Z-210811T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland-North Laramie Range/Medicine Bow NF- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Snowy Range/Medicine Bow NF-Laramie Valley/Shirley Basin- Platte/Goshen/Central and Eastern Laramie- 748 PM MDT Tue Aug 10 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 301, 302, 304, 305, 307, 308, AND 310... With the sun setting this evening...temperatures are cooling and humidity is slowly increasing. Winds have shown indications of decreasing as well. Therefore...the Red Flag Warnings will be allowed to expire on time at 8 PM this evening. $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:33 PM MDT | Special Weather Statement | CYS | Goshen, Platte | 42 min |
Nearby
Red Flag Warnings in Wyoming, 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.