Alert archive / Wyoming / Red Flag Warnings in 2011

Red Flag Warning 4, NWS Cheyenne, WY

August 7, 2011

NWS Cheyenne, WY issued this red flag warning at Aug 7, 2011, 4:15 AM MDT. It took effect at Aug 7, 2011, 12:00 PM MDT. It was in force for 8 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 7, 2011, 4:15 AM MDT (10:15 UTC)
In effect from: Aug 7, 2011, 12:00 PM MDT
Expired: Aug 7, 2011, 8:00 PM MDT
In force: 8 hr
Issued by: NWS Cheyenne, WY

The text

As transmitted, in the capitals the NWS used until 2016.

344 
WWUS85 KCYS 071015
RFWCYS

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
415 AM MDT SUN AUG 7 2011

...BREEZY AND VERY WARM WEATHER ALONG WITH SOME HIGH BASED
THUNDERSTORMS CAN BE EXPECTED OVER EAST CENTRAL WYOMING SUNDAY
AFTERNOON AND EVENING...

.FIRE WEATHER CONCERNS WILL INCREASE OVER EAST CENTRAL WYOMING
THIS AFTERNOON AND EVENING. BREEZY WEST WINDS WILL DEVELOP BY
MIDDAY AND WILL AID IN THE FORMATION OF HIGH BASED THUNDERSTORMS.
THESE STORMS WILL PRODUCE SOME LIGHTNING...BRIEF STRONG WIND
GUSTS...BUT LITTLE IN THE WAY OF RAINFALL. TEMPERATURES OVER THE
AREA SUNDAY AFTERNOON AND EVENING WILL BE ALSO BE VERY WARM AND
MINIMUM RELATIVE HUMIDITY VALUES 15 PERCENT OR LESS.

WYZ301-302-072200-
/O.UPG.KCYS.FW.A.0002.110807T1800Z-110808T0200Z/
/O.NEW.KCYS.FW.W.0004.110807T1800Z-110808T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-NORTH LARAMIE RANGE/MEDICINE BOW NF-
415 AM MDT SUN AUG 7 2011

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS
EVENING FOR DRY AND BREEZY CONDITIONS ALONG WITH POTENTIALLY SOME
DRY THUNDERSTORMS FOR FIRE WEATHER ZONES 301 AND 302...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A RED FLAG
WARNING FOR A COMBINATION OF DRY AND BREEZY CONDITIONS ALONG WITH
DRY THUNDERSTORM POTENTIAL. THE WATCH IS IN EFFECT FROM NOON
TODAY TO 8 PM MDT THIS EVENING. THE FIRE WEATHER WATCH IS NO
LONGER IN EFFECT.

* AFFECTED AREA...FIRE WEATHER ZONES 301 AND 302.

* WINDS...WEST 15 TO 20 MPH WITH GUSTS UP TO 30 MPH.

* TIMING...NOON THROUGH 8 PM.

* RELATIVE HUMIDITY...11 TO 15 PERCENT.

* TEMPERATURES...85 TO 90...WITH 75 TO 85 IN THE NORTHERN LARAMIE
  RANGE.

* LIGHTNING...SCATTERED THUNDERSTORMS WILL AGAIN AFFECT EAST
  CENTRAL WYOMING THIS AFTERNOON AND EVENING. MOST OF THESE STORMS
  WILL PRODUCE BRIEF GUSTY WINDS...OCCASIONAL LIGHTNING...BUT
  LITTLE RAINFALL.

* IMPACTS...THE STRONG AND GUSTY WINDS COMBINED WITH THE LOW
  RELATIVE HUMIDITIES WILL CREATE THE POTENTIAL FOR RAPID FIRE
  GROWTH AND SPREAD. ADDITIONAL LIGHTNING STRIKES MAY CAUSE MORE
  FIRE STARTS.

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 WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

HAHN

3 follow-up statements

567 
WWUS85 KCYS 072228
RFWCYS

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
428 PM MDT SUN AUG 7 2011

...BREEZY AND VERY WARM WEATHER ALONG WITH SOME HIGH BASED
THUNDERSTORMS WILL CONTINUE OVER EAST CENTRAL WYOMING THROUGH
THIS EVENING...

.CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE OVER EAST CENTRAL
WYOMING LATE THIS AFTERNOON AND EVENING. BREEZY WESTERLY WINDS
GUSTING 25 TO 35 MPH WITH LOCALLY HIGHER GUSTS UP TO 50 MPH DUE TO
THUNDERSTORM DOWNDRAFTS WILL COMBINE WITH HUMIDITIES IN THE LOW TO
MID TEENS. DRY THUNDERSTORMS WILL ALSO CONTINUE TO PRODUCE SOME
LIGHTNING...BRIEF STRONG WIND GUSTS...BUT LITTLE IN THE WAY OF
RAINFALL.

WYZ301-302-080200-
/O.CON.KCYS.FW.W.0004.000000T0000Z-110808T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-NORTH LARAMIE RANGE/MEDICINE BOW NF-
428 PM MDT SUN AUG 7 2011

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR DRY AND BREEZY CONDITIONS ALONG WITH POTENTIALLY SOME DRY
THUNDERSTORMS FOR FIRE WEATHER ZONES 301 AND 302...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING.

* AFFECTED AREA...FIRE WEATHER ZONES 301 AND 302.

* WINDS...SOUTHWEST TO NORTHWEST WINDS 15 TO 25 MPH GUSTING TO 35 MPH.

* TIMING...THROUGH 8 PM.

* RELATIVE HUMIDITY...10 TO 15 PERCENT.

* TEMPERATURES...85 TO 95...WITH 75 TO 85 IN THE NORTHERN LARAMIE
  RANGE.

* LIGHTNING...SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS EAST
  CENTRAL WYOMING THIS AFTERNOON AND EVENING. MOST OF THESE STORMS
  WILL PRODUCE BRIEF GUSTY WINDS...OCCASIONAL LIGHTNING... BUT
  LITTLE RAINFALL.

* IMPACTS...THE STRONG AND GUSTY WINDS COMBINED WITH THE LOW 
  RELATIVE HUMIDITIES WILL CREATE THE POTENTIAL FOR RAPID FIRE 
  GROWTH AND SPREAD. ADDITIONAL LIGHTNING STRIKES MAY CAUSE MORE 
  FIRE STARTS. 

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 WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

RJM

663 
WWUS85 KCYS 072233 AAA
RFWCYS

URGENT - FIRE WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE CHEYENNE WY
433 PM MDT SUN AUG 7 2011

...BREEZY AND VERY WARM WEATHER ALONG WITH SOME HIGH BASED
THUNDERSTORMS WILL CONTINUE OVER EAST CENTRAL WYOMING THROUGH
THIS EVENING...

.CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE OVER EAST CENTRAL
WYOMING LATE THIS AFTERNOON AND EVENING. BREEZY WESTERLY WINDS
GUSTING 25 TO 35 MPH WITH LOCALLY HIGHER GUSTS UP TO 50 MPH DUE
TO THUNDERSTORM DOWNDRAFTS WILL COMBINE WITH HUMIDITIES IN THE
LOW TO MID TEENS. DRY THUNDERSTORMS WILL ALSO CONTINUE TO PRODUCE
SOME LIGHTNING...BRIEF STRONG WIND GUSTS...BUT LITTLE IN THE WAY
OF RAINFALL.

WYZ301-302-080200-
/O.CON.KCYS.FW.W.0004.000000T0000Z-110808T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-NORTH LARAMIE RANGE/MEDICINE BOW NF-
433 PM MDT SUN AUG 7 2011

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR DRY AND BREEZY CONDITIONS ALONG WITH POTENTIALLY SOME DRY
THUNDERSTORMS FOR FIRE WEATHER ZONES 301 AND 302...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING.

* AFFECTED AREA...FIRE WEATHER ZONES 301 AND 302.

* WINDS...SOUTHWEST TO NORTHWEST WINDS 15 TO 25 MPH GUSTING TO 35
  MPH. SOME LOCAL GUSTS UP TO 50 MPH ARE POSSIBLE WITH
  THUNDERSTORM DOWNDRAFTS.

* TIMING...THROUGH 8 PM.

* RELATIVE HUMIDITY...10 TO 15 PERCENT.

* TEMPERATURES...85 TO 95 DEGREES...WITH 75 TO 85 DEGREES IN THE
  NORTHERN LARAMIE RANGE.

* LIGHTNING...SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS EAST
  CENTRAL WYOMING THIS AFTERNOON AND EVENING. MOST OF THESE STORMS
  WILL PRODUCE BRIEF GUSTY WINDS...OCCASIONAL LIGHTNING...BUT
  LITTLE RAINFALL.

* IMPACTS...THE STRONG AND GUSTY WINDS COMBINED WITH THE LOW 
  RELATIVE HUMIDITIES WILL CREATE THE POTENTIAL FOR RAPID FIRE 
  GROWTH AND SPREAD. ADDITIONAL LIGHTNING STRIKES MAY CAUSE MORE 
  FIRE STARTS. 

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 WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

RJM

422 
WWUS85 KCYS 080157 AAA
RFWCYS

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
757 PM MDT SUN AUG 7 2011

WYZ301-302-080300-
/O.EXP.KCYS.FW.W.0004.000000T0000Z-110808T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-NORTH LARAMIE RANGE/MEDICINE BOW NF-
757 PM MDT SUN AUG 7 2011

...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR FIRE
WEATHER ZONES 301 AND 302...

THE RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING. 

CRITICAL CONDITIONS CONTINUE TO EASE THIS EVENING AS HUMIDITIES
ARE SLOWLY RISING AND WINDS ARE DIMINISHING. ALSO...THUNDERSTORM
ACTIVITY HAS OVERALL DIMINISHED WITH ONLY A FEW WEAK SHOWERS
EXPECTED TO MOVE ACROSS THE AREA THROUGH 9 PM. ISOLATED GUSTY
DOWNDRAFT WINDS ARE POSSIBLE MAINLY ACROSS ZONE 302 DURING THIS
TIME.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 8:04 PM MDT	Fire Weather Watch	CYS		8 hr
Aug 7, 5:08 PM MDT	Special Weather Statement	CYS	Converse, Niobrara	52 min

Nearby

Red Flag Warnings in Wyoming, 2011 Every red flag warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.