Alert archive / Wyoming / Red Flag Warnings in 2011
Red Flag Warning 2, NWS Riverton, WY
NWS Riverton, WY issued this red flag warning at Aug 17, 2011, 9:01 AM MDT for Fremont County, Hot Springs County, Park County, Wyoming. It took effect at Aug 17, 2011, 1:00 PM MDT. It was in force for 7 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 17, 2011, 9:01 AM MDT (15:01 UTC)
- In effect from
- Aug 17, 2011, 1:00 PM MDT
- Expired
- Aug 17, 2011, 8:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Hot Springs County, WY, Park County, WY
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 3.0 hours before the alert went out and 86 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 4046 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
457 WWUS85 KRIW 171501 RFWRIW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 901 AM MDT WED AUG 17 2011 ...RED FLAG CONDITIONS EXPECTED OVER THE ABSAROKA MOUNTAINS AND EAST SLOPE OF THE WIND RIVER MOUNTAINS THIS AFTERNOON AND EVENING... .WARM...VERY DRY AND BREEZY CONDITIONS ARE EXPECTED TO COMBINE WITH CRITICAL FUEL CONDITIONS AND RECENT LIGHTNING STRIKES TO PRODUCE RED FLAG CONDITIONS THIS AFTERNOON AND EARLY EVENING OVER THE ABSAROKA MOUNTAINS AND EAST SLOPE OF THE WIND RIVER MOUNTAINS. WYZ286-180200- /O.NEW.KRIW.FW.W.0002.110817T1900Z-110818T0200Z/ ABSAROKA MOUNTAINS/NORTH SHOSHONE NF- 901 AM MDT WED AUG 17 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 286... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 286. * WINDS...WEST 10 TO 20 MPH WITH GUSTS AROUND 30 MPH. * RELATIVE HUMIDITY...8 TO 14 PERCENT. * IMPACTS...THE WARM...DRY AND BREEZY CONDITIONS WILL IMPACT THE ONGOING NORTON POINT FIRE AND POTENTIALLY OTHER RECENT LIGHTNING STRIKE AREAS. THE COMBINATION OF THE ABOVE FACTORS AND CRITICAL FUELS WILL PRODUCE RED FLAG CONDITIONS THIS AFTERNOON AND EARLY EVENING. 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. && $$ WYZ288-180200- /O.NEW.KRIW.FW.W.0002.110817T1900Z-110818T0200Z/ EAST WIND RIVER MOUNTAINS/SOUTH SHOSHONE NF- 901 AM MDT WED AUG 17 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 288... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 288. * WINDS...WEST 10 TO 20 MPH WITH GUSTS UP TO 35 MPH. * RELATIVE HUMIDITY...8 TO 14 PERCENT. * IMPACTS...WARM CONDITIONS WILL COMBINE WITH VERY LOW RELATIVE HUMIDITIES AND BREEZY CONDITIONS TO PRODUCE RED FLAG CONDITIONS...ESPECIALLY WHEN COMBINED WITH CRITICAL FUELS. ANY RECENT LIGHTNING STRIKES MAY ALSO PRODUCE NEW FIRES WHEN FANNED BY THE WARM...DRY WIND. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && SKRBAC $$ HTTP://WEATHER.GOV/RIVERTON
2 follow-up statements
359 WWUS85 KRIW 171934 RFWRIW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 134 PM MDT WED AUG 17 2011 ...RED FLAG CONDITIONS EXPECTED OVER THE ABSAROKA MOUNTAINS AND EAST SLOPE OF THE WIND RIVER MOUNTAINS THROUGH 8 PM THIS EVENING... .WARM...VERY DRY AND BREEZY CONDITIONS ARE EXPECTED TO COMBINE WITH CRITICAL FUEL CONDITIONS AND RECENT LIGHTNING STRIKES TO PRODUCE RED FLAG CONDITIONS THROUGH EARLY EVENING OVER THE ABSAROKA MOUNTAINS AND EAST SLOPE OF THE WIND RIVER MOUNTAINS. WYZ286-180200- /O.CON.KRIW.FW.W.0002.000000T0000Z-110818T0200Z/ ABSAROKA MOUNTAINS/NORTH SHOSHONE NF- 134 PM MDT WED AUG 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 286... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 286. * WINDS...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...AS LOW AS 12 PERCENT. * IMPACTS...THE WARM...DRY AND BREEZY CONDITIONS WILL IMPACT THE ONGOING NORTON POINT FIRE AND POTENTIALLY OTHER RECENT LIGHTNING STRIKE AREAS. THE COMBINATION OF THE ABOVE FACTORS AND CRITICAL FUELS WILL PRODUCE RED FLAG CONDITIONS THIS AFTERNOON AND EARLY EVENING. 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. && $$ WYZ288-180200- /O.CON.KRIW.FW.W.0002.000000T0000Z-110818T0200Z/ EAST WIND RIVER MOUNTAINS/SOUTH SHOSHONE NF- 134 PM MDT WED AUG 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 288... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 288. * WINDS...WEST 10 TO 20 MPH WITH GUSTS UP TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 10 PERCENT. * IMPACTS...WARM CONDITIONS WILL COMBINE WITH VERY LOW RELATIVE HUMIDITIES AND BREEZY CONDITIONS TO PRODUCE RED FLAG CONDITIONS...ESPECIALLY WHEN COMBINED WITH CRITICAL FUELS. ANY RECENT LIGHTNING STRIKES MAY ALSO PRODUCE NEW FIRES WHEN FANNED BY THE WARM...DRY WIND. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && SKRBAC $$ HTTP://WEATHER.GOV/RIVERTON
064 WWUS85 KRIW 180203 RFWRIW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 803 PM MDT WED AUG 17 2011 ...RED FLAG WARNING HAS BEEN ALLOWED TO EXPIRE... WYZ286-288-180315- /O.EXP.KRIW.FW.W.0002.000000T0000Z-110818T0200Z/ ABSAROKA MOUNTAINS/NORTH SHOSHONE NF- EAST WIND RIVER MOUNTAINS/SOUTH SHOSHONE NF- 803 PM MDT WED AUG 17 2011 ...RED FLAG WARNING HAS EXPIRED FOR FIRE WEATHER ZONES 286 AND 288... THE RED FLAG WARNING IS NO LONGER IN EFFECT. WIND HAS DECREASED AND RELATIVE HUMIDITY HAS INCREASED AS TEMPERATURES HAVE COOLED THIS EVENING THEREFORE THE RED FLAG WARNING HAS BEEN ALLOWED TO EXPIRE. && BERC $$ HTTP://WEATHER.GOV/RIVERTON
Nearby
Red Flag Warnings in Wyoming, 2011Every 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; the sounding from the Mesonet's radiosonde archive.