Red Flag Warning
Issued by NWS Riverton, WY

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000
WWUS85 KRIW 011642
RFWRIW

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1042 AM MDT TUE SEP 1 2015

...ELEVATED TO EXTREME FIRE DANGER PROBABLE FOR THE NEXT SEVERAL
DAYS...

.HOT DRY AND WINDY AGAIN TODAY. WINDS WILL BE LOCALLY ENHANCED BY
THE STORMS ACROSS THE AREA TODAY...ESPECIALLY IN THE WESTERN
MOUNTAINS WHERE THE STORMS WILL BE THE MOST NUMEROUS. STORMS WILL
BE MIXED WET AND DRY WITH SOME LAL OF 6 POSSIBLE...ESPECIALLY IN
THE DRIER FOOTHILLS AND IF ANY STORMS GET INTO THE BASINS EAST OF
THE DIVIDE. IN ADDITION...THERE WILL BE A HAINES INDEX OF 5 OR 6
ACROSS THE AREA FOR THE NEXT FEW DAYS.

STRONG SOUTHWEST FLOW WILL INCREASE ACROSS THE STATE ON WEDNESDAY
AND THURSDAY AS A TROUGH APPROACHES FROM THE WEST WITH WIDESPREAD
LOW HUMIDITY AND STRONG WIND.

WYZ275-277-279-414-415-020045-
/O.UPG.KRIW.FW.A.0007.150902T1700Z-150904T0300Z/
/O.EXB.KRIW.FW.W.0016.000000T0000Z-150904T0300Z/
NORTH BIG HORN BASIN/WORLAND BLM-
LINCOLN AND UINTA COUNTIES/LOWER ELEVATIONS-
SWEETWATER COUNTY/ROCK SPRINGS BLM/FLAMING GORGE NRA-
SALT AND WYOMING RANGES/WEST ZONE BRIDGER TETON NF-
NORTH ZONE BRIDGER TETON NF AND GRAND TETON NP-
1042 AM MDT TUE SEP 1 2015

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THURSDAY FOR STRONG
WIND AND LOW HUMIDITY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT UNTIL 9 PM MDT THURSDAY. THE FIRE
WEATHER WATCH IS NO LONGER IN EFFECT.

* WIND...BECOMING SOUTHWEST AT 15 TO 25 MPH WITH GUSTS OF 30 TO 40
  MPH POSSIBLE FROM THUNDERSTORM OUTFLOW WINDS...GUSTS OF THIS
  MAGNITUDE WILL BE MORE COMMON ON WEDNESDAY. SLIGHTLY LESS WIND
  EXPECTED ON THURSDAY...HOWEVER...GUSTS OF 25 TO 30 MPH OR HIGHER
  ARE POSSIBLE.

* HUMIDITY...AROUND 15 PERCENT IN ZONES 414 AND 415 AND ACROSS THE
  SOUTH BEFORE THUNDERSTORMS DEVELOP...10 TO 15 PERCENT IN ZONE
  416. MINIMUM RELATIVE HUMIDITIES WILL BOTTOM OUT BELOW 10
  PERCENT IN ZONE 275. RELATIVE HUMIDITIES WILL RECOVER ABOVE 30
  PERCENT IN MOST AREAS A LITTLE BEFORE MIDNIGHT WITH POOR RH
  RECOVERY AT MID SLOPE...ESPECIALLY EAST OF THE DIVIDE. RELATIVE
  HUMIDITY WILL DROP BELOW 15 PERCENT AROUND NOON ON WEDNESDAY AND
  THURSDAY.

* THUNDERSTORMS...ISOLATED TO WIDELY SCATTERED THUNDERSTORMS THIS
  AFTERNOON AND EVENING...WITH A BETTER CHANCE OF A WET
  THUNDERSTORM ABOVE 8000 FT. LAL OF 6 POSSIBLE IN THE FOOTHILLS.
  STORMS WILL BE MORE ISOLATED IN THE BASINS. VERY DRY CONDITIONS
  EXPECTED WEDNESDAY...WITH LITTLE TO NO THUNDERSTORM THREAT.
  MAINLY DRY CONDITIONS EXPECTED AGAIN THURSDAY...WITH ONLY A VERY
  ISOLATED THUNDERSTORM POSSIBLE ACROSS NORTHWESTERN WYOMING.

* 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 WILL
CREATE EXTREME FIRE BEHAVIOR.

&&

$$

WYZ276-280>283-285-287-289-300-416-020045-
/O.EXT.KRIW.FW.W.0016.000000T0000Z-150904T0300Z/
CODY FOOTHILLS-NATRONA COUNTY/CASPER BLM-
JOHNSON COUNTY/CASPER BLM-SOUTH BIG HORN BASIN/WORLAND BLM-
UPPER WIND RIVER BASIN/WIND RIVER BASIN-SOUTH BIGHORN MOUNTAINS-
OWL CREEK MOUNTAINS-GRANITE/GREEN/FERRIS/RATTLESNAKE MOUNTAINS-
CASPER MOUNTAIN-
WEST WIND RIVER MOUNTAINS/EAST ZONE BRIDGER TETON NF-
1042 AM MDT TUE SEP 1 2015

...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT THURSDAY FOR
STRONG WIND AND LOW HUMIDITY...

* AFFECTED AREA...FIRE WEATHER ZONE 276. FIRE WEATHER ZONE 280.
  FIRE WEATHER ZONE 281. FIRE WEATHER ZONE 282. FIRE WEATHER
  ZONE 283. FIRE WEATHER ZONE 285. FIRE WEATHER ZONE 287. FIRE
  WEATHER ZONE 289. FIRE WEATHER ZONE 300. FIRE WEATHER ZONE
  416.

* WIND...SOUTHWEST WIND 15 TO 25 MPH WITH GUSTS TO 30 MPH THIS
  AFTERNOON AND 40 MPH WEDNESDAY AFTERNOON. STRONGER GUSTS
  POSSIBLE IN THUNDERSTORMS COULD SEND OUT STRONG OUTFLOW WINDS.

* HUMIDITY...LOW TO MID TEENS DURING THE AFTERNOONS. SOME OF THE
  LOWER BASINS EAST OF THE DIVIDE COULD SEE MINIMUM RELATIVE
  HUMIDITIES IN THE SINGLE DIGITS TODAY. POOR RELATIVE HUMIDITY
  RECOVERY AT MID SLOPE OVERNIGHT.

* 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 WILL
CREATE EXTREME FIRE BEHAVIOR.

&&

$$



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