Alert archive / Wyoming / Red Flag Warnings in 2021

Red Flag Warning 19, NWS Cheyenne, WY

August 21, 2021

NWS Cheyenne, WY issued this red flag warning at Aug 21, 2021, 8:58 PM MDT. It took effect at Aug 22, 2021, 10:00 AM MDT. It was in force for 10 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 21, 2021, 8:58 PM MDT (02:58 UTC)
In effect from
Aug 22, 2021, 10:00 AM MDT
Expired
Aug 22, 2021, 8:00 PM MDT
In force
10 hr
Issued by
NWS Cheyenne, WY

The text

As transmitted.

795 
WWUS85 KCYS 220258
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
858 PM MDT Sat Aug 21 2021

...CRITICAL FIRE WEATHER CONDITIONS EXPECTED ALONG AND EAST OF
INTERSTATE 25 IN SOUTHEAST WYOMING AND WESTERN NEBRASKA. RED FLAG
WARNINGS IN EFFECT FOR SUNDAY...

NEZ311>313-WYZ301-310-221200-
/O.UPG.KCYS.FW.A.0018.210822T1600Z-210823T0200Z/
/O.NEW.KCYS.FW.W.0019.210822T1600Z-210823T0200Z/
Pine Ridge/Nebraska National Forest/Oglala National Grasslands-
Box Butte/South Sioux-
Scotts Bluff National Monument/Wildcat Hills-
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-Platte/Goshen/Central and Eastern Laramie-
858 PM MDT Sat Aug 21 2021

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MDT SUNDAY 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 8 PM MDT Sunday. The
Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Fire Weather Zones 301, 310, 311, 312, and 
  313. 

* WIND...West 20 to 25 MPH with gusts up to 40 MPH.

* HUMIDITY...10 to 15 percent.

* 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.

&&

$$
3 follow-up statements
858 
WWUS85 KCYS 220835
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
235 AM MDT Sun Aug 22 2021

...CRITICAL FIRE WEATHER CONDITIONS EXPECTED ALONG AND EAST OF
INTERSTATE 25 IN SOUTHEAST WYOMING AND WESTERN NEBRASKA. RED FLAG
WARNINGS IN EFFECT FOR SUNDAY...

WYZ301-230200-
/O.NEW.KCYS.FW.A.0019.210823T1800Z-210824T0200Z/
/O.CON.KCYS.FW.W.0019.210822T1600Z-210823T0200Z/
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
235 AM MDT Sun Aug 22 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE 
WEATHER ZONE 301... 
...FIRE WEATHER WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH 
MONDAY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER 
ZONE 301...

The National Weather Service in Cheyenne has issued a Fire
Weather Watch, which is in effect from Monday afternoon through
Monday evening. 

* AFFECTED AREA...Fire Weather Zones 301, 310, 311, 312, and 
  313. 

* WIND...West 20 to 25 MPH with gusts up to 40 MPH.

* HUMIDITY...10 to 15 percent.

* 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.

A Fire Weather Watch means that critical fire weather conditions
may develop. Listen for later forecasts and possible Red Flag
Warnings.

&&

$$

NEZ311>313-WYZ310-230200-
/O.CON.KCYS.FW.W.0019.210822T1600Z-210823T0200Z/
Pine Ridge/Nebraska National Forest/Oglala National Grasslands-
Box Butte/South Sioux-
Scotts Bluff National Monument/Wildcat Hills-
Platte/Goshen/Central and Eastern Laramie-
235 AM MDT Sun Aug 22 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE 
WEATHER ZONES 310, 311, 312, AND 313...

* AFFECTED AREA...Fire Weather Zones 301, 310, 311, 312, and 
  313. 

* WIND...West 20 to 25 MPH with gusts up to 40 MPH.

* HUMIDITY...10 to 15 percent.

* 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.

&&

$$

WM
052 
WWUS85 KCYS 222034
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
234 PM MDT Sun Aug 22 2021

...CRITICAL FIRE WEATHER CONDITIONS EXPECTED ALONG AND EAST OF
INTERSTATE 25 IN SOUTHEAST WYOMING AND WESTERN NEBRASKA WILL
REMAIN IN EFFECT TODAY... 

...RED FLAG WARNINGS ARE ALSO IN EFFECT FOR FIRE WEATHER ZONE 301
FROM NOON TO 8 PM MONDAY...

WYZ301-231100-
/O.UPG.KCYS.FW.A.0019.210823T1800Z-210824T0200Z/
/O.NEW.KCYS.FW.W.0020.210823T1800Z-210824T0200Z/
/O.CON.KCYS.FW.W.0019.000000T0000Z-210823T0200Z/
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
234 PM MDT Sun Aug 22 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 301... 

...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT MONDAY FOR LOW
HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 301...

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from noon to 8 PM MDT Monday. The
Fire Weather Watch is no longer in effect. 


* AFFECTED AREA...Fire Weather Zones 301, 310, 311, 312, and 
  313. 

* WIND...West 20 to 25 MPH with gusts up to 40 MPH.

* HUMIDITY...10 to 15 percent.

* 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-WYZ310-230200-
/O.CON.KCYS.FW.W.0019.000000T0000Z-210823T0200Z/
Pine Ridge/Nebraska National Forest/Oglala National Grasslands-
Box Butte/South Sioux-
Scotts Bluff National Monument/Wildcat Hills-
Platte/Goshen/Central and Eastern Laramie-
234 PM MDT Sun Aug 22 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 310, 311,
312, AND 313...

* AFFECTED AREA...Fire Weather Zones 301, 310, 311, 312, and 
  313. 

* WIND...West 20 to 25 MPH with gusts up to 40 MPH.

* HUMIDITY...10 to 15 percent.

* 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.

&&

$$
983 
WWUS85 KCYS 230158
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
758 PM MDT Sun Aug 22 2021

...RED FLAG WARNINGS IN EFFECT FOR FIRE WEATHER ZONE 301 FROM 
NOON TO 8 PM MONDAY...

WYZ301-231000-
/O.EXP.KCYS.FW.W.0019.000000T0000Z-210823T0200Z/
/O.CON.KCYS.FW.W.0020.210823T1800Z-210824T0200Z/
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
758 PM MDT Sun Aug 22 2021

...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT MONDAY FOR LOW
HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 301...

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from noon to 8 PM MDT Monday. 

* AFFECTED AREA...Fire Weather Zones 301.

* WIND...West 20 to 25 MPH with gusts up to 40 MPH.

* HUMIDITY...10 to 15 percent.

* 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-WYZ310-230300-
/O.EXP.KCYS.FW.W.0019.000000T0000Z-210823T0200Z/
Pine Ridge/Nebraska National Forest/Oglala National Grasslands-
Box Butte/South Sioux-
Scotts Bluff National Monument/Wildcat Hills-
Platte/Goshen/Central and Eastern Laramie-
758 PM MDT Sun Aug 22 2021

...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR FIRE
WEATHER ZONES 301, 310, 311, 312, AND 313...

Light winds will continue for another hour or two, but have
dropped below Red Flag criteria for the evening.

$$

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 22, 2:35 AM MDTFire Weather WatchCYS12 hr
Aug 22, 2:34 PM MDTRed Flag WarningCYS29 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.