Alert archive / Wyoming / Red Flag Warnings in 2021

Red Flag Warning 29, NWS Cheyenne, WY

September 8, 2021

NWS Cheyenne, WY issued this red flag warning at Sep 8, 2021, 6:02 PM MDT. It took effect at Sep 9, 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
Sep 8, 2021, 6:02 PM MDT (00:02 UTC)
In effect from
Sep 9, 2021, 10:00 AM MDT
Expired
Sep 9, 2021, 8:00 PM MDT
In force
10 hr
Issued by
NWS Cheyenne, WY

The text

As transmitted.

401 
WWUS85 KCYS 090002
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
602 PM MDT Wed Sep 8 2021

...RED FLAG WARNING IN EFFECT FOR GUSTY WINDS AND LOW HUMIDITY
THURSDAY FOR FWZ 301 AND 311...

...FIRE WEATHER WATCH FOR FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY
FWZ 301...302...303 AND NORTHERN 308...

WYZ301-091200-
/O.UPG.KCYS.FW.A.0027.210909T1600Z-210910T0200Z/
/O.NEW.KCYS.FW.W.0029.210909T1600Z-210910T0200Z/
/O.NEW.KCYS.FW.A.0028.210910T1600Z-210911T0200Z/
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
602 PM MDT Wed Sep 8 2021

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MDT THURSDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 301... 

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH 
FRIDAY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER 
ZONE 301...

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 8 PM MDT Thursday. a
Fire Weather Watch has also been issued. This Fire Weather Watch
is in effect from Friday morning through Friday evening. 

* WIND...West to northwest winds around 15 MPH with occasional
  gusts 25 to 30 MPH. Stronger...more widespread winds expected 
  Friday with gusts to 35 mph possible.

* HUMIDITY...8 to 12 percent.

* HAINES...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 are expected to develop with high
certainty. 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.

&&

$$

NEZ311-091200-
/O.UPG.KCYS.FW.A.0027.210909T1600Z-210910T0200Z/
/O.NEW.KCYS.FW.W.0029.210909T1600Z-210910T0200Z/
Pine Ridge/Nebraska National Forest/Oglala National Grasslands-
602 PM MDT Wed Sep 8 2021

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MDT THURSDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 311...

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 8 PM MDT Thursday. The
Fire Weather Watch is no longer in effect. 

* WIND...West to northwest winds around 15 to 20 MPH with
  occasional gusts 30 to 35 MPH. 

* HUMIDITY...10 to 15 percent.

* HAINES...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 are expected to develop with high
certainty. A combination of strong winds...low relative 
humidity...and warm temperatures can contribute to extreme fire 
behavior.

&&

$$

WYZ302-303-308-091200-
/O.NEW.KCYS.FW.A.0028.210910T1600Z-210911T0200Z/
North Laramie Range/Medicine Bow NF-
Central and Northern Carbon/Ferris-Seminoe-Shirley Mountains-
Laramie Valley/Shirley Basin-
602 PM MDT Wed Sep 8 2021

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER 
ZONES 302, 303, AND 308...

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 302...303 and Northern 308. 
 
* WIND...West to northwest winds around 15 to 20 MPH with
  occasional gusts 30 to 35 MPH. 

* HUMIDITY...10 to 15 percent.

* HAINES...6.

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* 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.

&&

$$
2 follow-up statements
532 
WWUS85 KCYS 091103
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
503 AM MDT Thu Sep 9 2021

...RED FLAG WARNING IN EFFECT FOR GUSTY WINDS AND LOW HUMIDITY
THURSDAY FOR FWZ 301 AND 311...

...FIRE WEATHER WATCH FOR FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY
FWZ 301...302...303 AND NORTHERN 308...

WYZ301-100000-
/O.CON.KCYS.FW.W.0029.210909T1600Z-210910T0200Z/
/O.CON.KCYS.FW.A.0028.210910T1600Z-210911T0200Z/
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
503 AM MDT Thu Sep 9 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 REMAINS IN EFFECT FROM FRIDAY MORNING
THROUGH FRIDAY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE
WEATHER ZONE 301...

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 8 PM MDT Thursday. a
Fire Weather Watch has also been issued. This Fire Weather Watch
is in effect from Friday morning through Friday evening.

* WIND...West to northwest winds around 15 MPH with occasional 
  gusts 25 to 30 MPH. Stronger...more widespread winds expected 
  Friday with gusts to 35 mph possible. 

* HUMIDITY...8 to 12 percent.

* HAINES...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 are expected to develop with high
certainty. 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.

&&

$$

NEZ311-100000-
/O.CON.KCYS.FW.W.0029.210909T1600Z-210910T0200Z/
Pine Ridge/Nebraska National Forest/Oglala National Grasslands-
503 AM MDT Thu Sep 9 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 311...

* WIND...West to northwest winds around 15 to 20 MPH with 
  occasional gusts 30 to 35 MPH. 

* HUMIDITY...10 to 15 percent.

* HAINES...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 are expected to develop with high
certainty. A combination of strong winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior.

&&

$$

WYZ302-303-308-100000-
/O.CON.KCYS.FW.A.0028.210910T1600Z-210911T0200Z/
North Laramie Range/Medicine Bow NF-
Central and Northern Carbon/Ferris-Seminoe-Shirley Mountains-
Laramie Valley/Shirley Basin-
503 AM MDT Thu Sep 9 2021

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING
THROUGH FRIDAY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE
WEATHER ZONES 302, 303, AND 308...

* AFFECTED AREA...Fire weather zone 302...303 and Northern 308.

* WIND...West to northwest winds around 15 to 20 MPH with 
  occasional gusts 30 to 35 MPH.

* HUMIDITY...10 to 15 percent.

* HAINES...6.

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* 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.

&&

$$
548 
WWUS85 KCYS 100155
RFWCYS

URGENT - FIRE WEATHER MESSAGE
National Weather Service Cheyenne WY
755 PM MDT Thu Sep 9 2021

...RED FLAG WARNING IN EFFECT FOR GUSTY WINDS AND LOW HUMIDITY
FRIDAY FOR FWZ 301...302...303 AND NORTHERN 308...

WYZ301-101200-
/O.EXP.KCYS.FW.W.0029.000000T0000Z-210910T0200Z/
/O.UPG.KCYS.FW.A.0028.210910T1600Z-210911T0200Z/
/O.NEW.KCYS.FW.W.0030.210910T1600Z-210911T0200Z/
Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
755 PM MDT Thu Sep 9 2021

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MDT FRIDAY FOR
GUSTY WINDS AND LOW HUMIDITY...

...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR 
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 301...

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 8 PM MDT Friday. The
Fire Weather Watch is no longer in effect. 

* WIND...West to northwest winds 15 to 25 mph with gusts to 35
  mph. 

* HUMIDITY...8 to 12 percent.

* HAINES...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 are expected to develop with high
certainty. A combination of strong winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior.

&&


$$

NEZ311-100300-
/O.EXP.KCYS.FW.W.0029.000000T0000Z-210910T0200Z/
Pine Ridge/Nebraska National Forest/Oglala National Grasslands-
755 PM MDT Thu Sep 9 2021

...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 311...

Winds have eased and are no longer expected to be critical.
Evening humidity is slowly recovering. Thus the Red Flag Warning 
will be allowed to expire on time at 8 PM.

$$

WYZ302-303-308-101200-
/O.UPG.KCYS.FW.A.0028.210910T1600Z-210911T0200Z/
/O.NEW.KCYS.FW.W.0030.210910T1600Z-210911T0200Z/
North Laramie Range/Medicine Bow NF-
Central and Northern Carbon/Ferris-Seminoe-Shirley Mountains-
Laramie Valley/Shirley Basin-
755 PM MDT Thu Sep 9 2021

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MDT FRIDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR FWZ 302...303 AND NORTHERN 308...

The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 8 PM MDT Friday. The
Fire Weather Watch is no longer in effect. 

* WIND...West to northwest winds around 15 to 20 MPH with 
  occasional gusts 30 to 35 MPH. 

* HUMIDITY...10 to 15 percent.

* HAINES...6.

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* 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.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 6:02 PM MDTFire Weather WatchCYS26 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.