Special Weather Statement
Issued by NWS Riverton, WY

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WWUS85 KRIW 112121
SPSRIW

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
321 PM MDT SAT MAY 11 2013

WYZ001>020-022>030-122300-
ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST-
BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS-
EAST SWEETWATER COUNTY-FLAMING GORGE-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS-
NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN-
NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS-
ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES-
SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN-
SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN-
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN-
WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST-
YELLOWSTONE NATIONAL PARK-
321 PM MDT SAT MAY 11 2013

...WARMING TEMPERATURES STILL TO OCCUR SUNDAY THROUGH MONDAY
CREATING RISES IN CREEKS...STREAMS AND RIVERS...

THOSE PLANNING OUTDOOR ACTIVITIES IN THE HIGH COUNTRY AND ALONG
CREEKS...STEAMS AND RIVERS INTO NEXT WEEK...SHOULD BE PREPARED FOR
RISING WATER DUE TO HIGH ELEVATION SNOWMELT.

HIGH TEMPERATURES IN THE MOUNTAINS SUNDAY WILL BE MAINLY IN THE 60S
WITH MID 60S TO LOWER 70S FOR HIGHS ON MONDAY. MOUNTAIN LOW
TEMPERATURES WILL BE IN THE 30S TO LOWER 40S SUNDAY AND IN THE
MID 30S TO MID 40S ON MONDAY. THEREFORE...MELTING SNOW ABOVE 9000
FEET WILL INCREASE. IN ADDITION...A GUSTY WEST TO SOUTHWEST WIND OF
25 TO 35 MPH ON MONDAY WILL OCCUR IN THE MOUNTAINS...WHICH WILL
INCREASE SNOWMELT.

WATER LEVELS USUALLY RISE DURING THE EVENING AND OVERNIGHT HOURS AND
THEN REMAIN STEADY OR RISE AT A SLOWER RATE DURING THE MORNING AND
AFTERNOON HOURS. IN ADDITION...WATER RISES FASTER IN CREEKS AND
STREAMS THAT HAVE A MORE NARROW CHANNEL THAN THOSE WATERWAYS WITH A
WIDER CHANNEL.

AT THIS TIME...FLOODING OF MAJOR CREEKS...STREAMS AND RIVERS IS NOT
EXPECTED. HOWEVER...SMALL STREAMS AND CREEKS IN THE HIGH COUNTRY
DOWNSTREAM OF THE SNOWPACK MAY FLOW OUTSIDE THEIR BANKS AT TIMES.

$$

AR
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