Alert archive / Wyoming / Red Flag Warnings in 2011

Red Flag Warning 5, NWS Cheyenne, WY

August 11, 2011

NWS Cheyenne, WY issued this red flag warning at Aug 11, 2011, 2:57 AM MDT. It took effect at Aug 11, 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 11, 2011, 2:57 AM MDT (08:57 UTC)
In effect from: Aug 11, 2011, 12:00 PM MDT
Expired: Aug 11, 2011, 7:36 PM MDT
In force: 8 hr
Issued by: NWS Cheyenne, WY

The text

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

098 
WWUS85 KCYS 110857
RFWCYS

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
257 AM MDT THU AUG 11 2011

...CRITICAL FIRE WEATHER CONDITIONS TODAY FOR EAST CENTRAL WYOMING
AND THE UPPER NORTH PLATTE RIVER VALLEY...

.A LOW PRESSURE SYSTEM WILL TRACK ACROSS MONTANA TODAY. AHEAD OF
THIS LOW PRESSURE SYSTEM...WEST WINDS WILL INCREASE ACROSS MUCH
OF SOUTHEAST WYOMING THIS AFTERNOON. THESE WINDS...COMBINED WITH
TEMPERATURES IN THE UPPER 80S WILL CAUSE AFTERNOON HUMIDITIES TO
FALL INTO THE UPPER SINGLE DIGITS AND LOW TEENS. WINDS WILL
SUBSIDE AROUND SUNSET.

WYZ301-302-306-120000-
/O.UPG.KCYS.FW.A.0003.110811T1800Z-110812T0200Z/
/O.NEW.KCYS.FW.W.0005.110811T1800Z-110812T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-NORTH LARAMIE RANGE/MEDICINE BOW NF-
UPPER NORTH PLATTE RIVER BASIN-
257 AM MDT THU AUG 11 2011

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS
EVENING FOR LOW RELATIVE HUMIDITIES AND GUSTY WINDS FOR WYOMING
FIRE WEATHER ZONES 301...302 AND 306...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A RED FLAG
WARNING FOR LOW RELATIVE HUMIDITIES AND GUSTY WINDS...WHICH IS IN
EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING. THE FIRE WEATHER
WATCH IS NO LONGER IN EFFECT.

* AFFECTED AREA...WYOMING FIRE WEATHER ZONES 301...302 AND 306.

* WINDS...WEST 15 TO 25 MPH WITH GUSTS UP TO 35 MPH.

* TIMING...NOON THROUGH 8 PM TODAY.

* MINIMUM RELATIVE HUMIDITY...9 TO 14 PERCENT.

* TEMPERATURES...IN THE UPPER 80S...WITH UPPER 70S IN FIRE WEATHER
  ZONE 306.

* IMPACTS...THE STRONG AND GUSTY WINDS COMBINED WITH THE LOW 
  RELATIVE HUMIDITIES WILL CREATE THE POTENTIAL FOR RAPID FIRE 
  GROWTH AND SPREAD.

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

1 follow-up statement

884 
WWUS85 KCYS 120136
RFWCYS

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
736 PM MDT THU AUG 11 2011

WYZ301-302-306-120245-
/O.CAN.KCYS.FW.W.0005.000000T0000Z-110812T0200Z/
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL
GRASSLAND-NORTH LARAMIE RANGE/MEDICINE BOW NF-
UPPER NORTH PLATTE RIVER BASIN-
736 PM MDT THU AUG 11 2011

...RED FLAG WARNING IS CANCELLED FOR FIRE WEATHER ZONES 301...
302 AND 306...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS CANCELLED THE RED
FLAG WARNING.

CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE TO EASE TONIGHT AS
HUMIDITIES SLOWLY RISE AND WINDS DECREASE IN SPEED.

$$

RUBIN

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.