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Hazardous Weather Outlook

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
327 AM MDT MON AUG 31 2015

WYZ001>020-022>030-011200-
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-CODY FOOTHILLS-
NORTH BIG HORN BASIN-SOUTHWEST BIG HORN BASIN-
SOUTHEAST BIG HORN BASIN-OWL CREEK AND BRIDGER MOUNTAINS-
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY-
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-
UPPER WIND RIVER BASIN-WIND RIVER BASIN-LANDER FOOTHILLS-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-STAR VALLEY-
SALT RIVER AND WYOMING RANGES-UPPER GREEN RIVER BASIN FOOTHILLS-
UPPER GREEN RIVER BASIN-SOUTH LINCOLN COUNTY-
ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY-
327 AM MDT MON AUG 31 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WY...CENTRAL
WYOMING...NORTH CENTRAL WYOMING...NORTHWEST WYOMING...SOUTH
CENTRAL WYOMING AND WEST CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS SOUTH OF A LINE FROM ROCK SPRINGS TO CASPER
THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

TUESDAY...WARM AND BREEZY AT TIMES WITH ISOLATED TO WIDELY
SCATTERED THUNDERSTORMS...ESPECIALLY IN THE MOUNTAINS. ELEVATED
FIRE CONCERNS...ESPECIALLY ALONG AND EAST OF THE DIVIDE.

WEDNESDAY THROUGH THURSDAY...A FEW LATE DAY MOUNTAIN
THUNDERSTORMS POSSIBLE...CONTINUED WARM AND BREEZY TO WINDY AT
TIMES WITH ELEVATED FIRE CONCERNS...ESPECIALLY EAST OF THE DIVIDE
AND IN SWEETWATER COUNTY.

FRIDAY...WINDY AND WARM ACROSS THE SOUTH WITH ELEVATED FIRE
CONCERNS. COOLER IN THE NORTH AND WEST WITH A CHANCE OF SHOWERS
AND THUNDERSTORMS.

SATURDAY AND SUNDAY...COOLER WITH A CHANCE OF RAIN SHOWERS AND
ISOLATED THUNDERSTORMS...MAINLY IN THE NORTH AND WEST. SOME HIGHER
ELEVATION SNOW AT TIMES IN THE NORTHWEST MOUNTAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

$$

TEAM RIVERTON




Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
311 PM MDT MON AUG 31 2015

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

.HOT DRY AND WINDY FOR THE REST OF THE AFTERNOON WITH WESTERLY
WINDS PICKING UP AGAIN TOMORROW. WINDS WILL BE LOCALLY ENHANCED BY
THE STORMS ACROSS SOUTHERN WYOMING...WHICH ARE SENDING STRONG
OUTFLOW WINDS FAR FROM THE PARENT STORMS.

STRONG SOUTHWEST FLOW WILL INCREASE ACROSS THE STATE ON WEDNESDAY
AND THURSDAY AS A TROUGH APPROACHES FROM THE WEST.

WYZ276-280>283-285-287-289-300-416-010515-
/O.NEW.KRIW.FW.W.0016.150831T2111Z-150903T0300Z/
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-
311 PM MDT MON AUG 31 2015

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT WEDNESDAY 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 WEDNESDAY.

* 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 40 MPH...
  STRONGER GUSTS POSSIBLE LATE THIS AFTERNOON...ESPECIALLY IN
  FREMONT AND NATRONA COUNTIES WHERE NEARBY THUNDERSTORMS COULD
  SEND OUT STRONG OUTFLOW WINDS.

* HUMIDITY...6 TO 15 PERCENT...INCREASING ABOVE 30 PERCENT AROUND
  SUNRISE WITH POOR RECOVERY AT MID SLOPE. RELATIVE HUMIDITY WILL
  FALL BACK BELOW 15 PERCENT ON TUESDAY LATE MORNING...BOTTOMING
  OUT AGAIN AT AROUND 10 PERCENT.

* 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.

&&

$$




National Weather Service
Central Region Headquarters
Kansas City, Missouri
Last Modified: March 29, 2004
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