URGENT – WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
258 AM MDT FRI MAY 8 2015

…A RETURN OF WINTER THIS WEEKEND…

.AN APPROACHING AREA OF LOW PRESSURE WILL HELP TO SPREAD
PRECIPITATION ACROSS THE EASTERN HALF OF THE FORECAST AREA THROUGH
THE WEEKEND. POTENTIALLY SIGNIFICANT SNOWFALL WILL SEE ITS START
OVER THE CENTRAL MOUNTAINS LATE TONIGHT…AND SPREAD EAST THROUGH
SATURDAY. SNOWFALL WILL REACH THE BASIN FLOORS BY LATE SATURDAY
AFTERNOON AND THROUGH THE OVERNIGHT HOURS. SNOWFALL LOOKS
FAVORABLE TO ADVERSELY IMPACT TRAVEL AT MOUNTAIN LEVEL
PASSES…WHILE LOWER ELEVATIONS WILL SEE ADVERSE CONDITIONS
IMPACTING AGRICULTURAL MORE THAN TRAVEL CONCERNS. SNOWFALL LOOKS
FAVORABLE TO WEAKEN OVER THE AREA BY LATE SUNDAY EVENING.

WYZ015-082300-
/O.NEW.KRIW.WS.A.0007.150509T0000Z-150511T0000Z/
WIND RIVER MOUNTAINS EAST-
258 AM MDT FRI MAY 8 2015

…WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH SUNDAY
AFTERNOON…

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER
STORM WATCH…WHICH IS IN EFFECT FROM THIS EVENING THROUGH SUNDAY
AFTERNOON.

* SUMMARY AND TIMING…LOW PRESSURE WILL SPREAD SNOWFALL ACROSS
  THE AREA LATE THIS EVENING…WITH INTENSITY INCREASING THROUGH
  THE OVERNIGHT HOURS. SNOWFALL WILL CONTINUE THROUGH SUNDAY
  AFTERNOON BEFORE WEAKENING.

* SNOW ACCUMULATIONS…6 TO 10 INCHES POSSIBLE…WITH LOCALLY
  HIGHER AMOUNTS UP TO 13 INCHES.

* WIND AND VISIBILITY…GUSTY WIND TO 25 MPH WILL BE FOUND OVER
  THE SOUTH PASS AREA…POTENTIALLY BRINGING BLOWING AND DRIFTING
  SNOW TO THE MOUNTAIN PASS. VISIBILITIES MAY BECOME REDUCED AT
  TIMES.

* IMPACTS…MOTORISTS SHOULD MONITOR FOR CHANGING TRAVEL
  CONDITIONS OVER MOUNTAIN PASSES. THOSE WITH OUTDOOR INTERESTS
  SHOULD ALSO PREPARE FOR COOLER TEMPERATURES AND SNOWFALL…WHICH
  MAY SEEM MORE BITTER WITH INCREASED WIND.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

REMEMBER…A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE
FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA.

THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF
TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET
AT WYOROAD.INFO.

Information that includes Star Valley

WYZ001>020-022>030-091200-
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-
400 AM MDT FRI MAY 8 2015

…WINTER STORM WATCH FOR MUCH OF CENTRAL WYOMING THIS WEEKEND…

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE…TODAY AND TONIGHT

TODAY…TETON PASS WILL LIKELY BE SLICK FOR TRAVELLERS THIS MORNING
AS A PERIOD OF HEAVY SNOW MOVES NORTH ACROSS THE AREA. PERIODS OF
HIGHER MOUNTAIN SNOW WILL CONTINUE AT TIMES THROUGH TODAY BEFORE
INCREASING ALONG AND EAST OF THE DIVIDE TONIGHT. SNOW MAY BECOME
HEAVY AT TIMES ALONG THE EAST SLOPE OF THE WIND RIVER MOUNTAINS…
INCLUDING SOUTH PASS LATER TONIGHT.

ISOLATED THUNDERSTORMS ARE POSSIBLE AGAIN TODAY ACROSS THE WEST AND
SOUTH.

.DAYS TWO THROUGH SEVEN…SATURDAY THROUGH THURSDAY

SATURDAY AND SUNDAY…A MAJOR SPRING SNOWSTORM IS TAKING SHAPE FOR
MUCH OF CENTRAL WYOMING THIS WEEKEND. SIGNIFICANT SNOW IS EXPECTED
IN THE MOUNTAINS AND MAY ALSO FALL ACROSS THE LOWER ELEVATIONS OF
FREMONT…NATRONA AND JOHNSON COUNTIES OVER THE WEEKEND. CHECK THE
LATEST WINTER STORM WATCH STATEMENT FOR FURTHER DETAILS.

MONDAY THROUGH THURSDAY…ISOLATED AFTERNOON AND EVENING
THUNDERSTORMS ARE POSSIBLE EACH DAY…MAINLY ALONG AND WEST OF THE
DIVIDE.

.SPOTTER INFORMATION STATEMENT…

SPOTTERS ARE ENCOURAGED TO REPORT ANY HEAVY RAIN AMOUNTS OVER HALF
AN INCH TODAY AS WELL AS ANY SNOWFALL AMOUNTS. THANK YOU.

$$

TEAM RIVERTON