Winter Storm Warning Continues until Wednesday night across Western Wyoming and adjacent areas of Eastern Idaho

Winter Storm Warning Continues until Wednesday night across Western Wyoming and adjacent areas of Eastern Idaho

Water Vapor Image Monday Morning January 9 2017
The first in the series of storms impacted Western Wyoming including Star Valley with 
substantial precipitation including both rain and snow Sunday and Sunday night.  
As the water vapor image above illustrates, more moisture laden storms are headed for
the Cowboy state over the next 3 days.

Following is a model depiction of the forecast snow amounts from Monday morning until 
Wednesday evening.

Total model snowfall forecast from Monday morning until Wednesday evening in inches.

Riverton Forecast Office accordingly has continue the Winter Storm Warning for all of Western Wyoming including 
Star Valley through Wednesday night.
 
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
638 AM MST MON JAN 9 2017

...MAJOR LONG DURATION WINTER STORM TO IMPACT THE WEST THROUGH
WEDNESDAY NIGHT...

.SEVERAL WEATHER SYSTEMS WILL IMPACT THE WEST THROUGH WEDNESDAY
NIGHT BRINGING MULTIPLE PERIODS OF MODERATE TO HEAVY SNOW AND
WIND. THE MOST LIKELY TIMES FOR THE HEAVIEST SNOW AT THIS TIME
APPEAR TO BE TODAY...TUESDAY MORNING AND AGAIN LATE TUESDAY NIGHT
THROUGH WEDNESDAY.


STAR VALLEY-
INCLUDING THE CITIES OF...AFTON...ALPINE...STAR VALLEY RANCH...
THAYNE
638 AM MST MON JAN 9 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST
THURSDAY...

* TIMING...PERIODS OF MODERATE TO HEAVY SNOW EXPECTED THROUGH
  MUCH OF TODAY. ANOTHER ROUND OF HEAVY SNOW IS EXPECTED
  POSSIBLE TUESDAY MORNING AND AGAIN LATE TUESDAY NIGHT THROUGH
  WEDNESDAY WITH LIGHTER SNOW BETWEEN THESE TIMES. A MIX OF RAIN
  AND SNOW OR PLAIN RAIN MAY FALL FOR A WHILE THIS MORNING IN
  LOWER PORTIONS OF THE VALLEY BEFORE CHANGING BACK TO ALL SNOW.

* SNOWFALL SO FAR...3 TO 6 INCHES STORM TOTAL BUT PERIODS OF RAIN
  OR RAIN AND SNOW MIX OVERNIGHT.

* SNOW TOTALS...1 TO 2 FEET BY LATE WEDNESDAY NIGHT WITH THE
  HEAVIER AMOUNTS TOWARDS THE NORTH END OF THE VALLEY.

* WIND AND VISIBILITY...SOUTHWEST WIND INCREASING TO 15 TO 25
  MPH WITH GUSTS TO 35 MPH IN OPEN AREAS. VISIBILITIES UNDER ONE
  QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW.

* MAIN IMPACT...ROADS AND HIGHWAYS WILL BECOME SLICK AND SNOW
  PACKED WITH SHARPLY REDUCED VISIBILITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... AND
OR BLOWING SNOW ARE EXPECTED OR OCCURRING. THIS COULD MAKE TRAVEL
VERY HAZARDOUS OR IMPOSSIBLE. IF YOU MUST TRAVEL KEEP SOME FOOD...
WATER... AND AN EXTRA FLASHLIGHT IN YOUR VEHICLE IN CASE OF AN
EMERGENCY. CHECK THE LATEST ROAD CONDITIONS AT WYOROAD.INFO OR BY
DIALING 5 1 1.

The following is the Statement from Pocatello Weather Office concerning 
the Winter Storm Warning in Southeast Idaho.

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE POCATELLO ID
412 AM MST MON JAN 9 2017

...FREEZING RAIN, HEAVY HIGH ELEVATION SNOW ARRIVES TODAY...

.A MOISTURE-LADEN AND WARM AIRMASS CONTINUES TO COVER SOUTHEAST
IDAHO. THE AREA OF FREEZING RAIN THREAT HAS MOVED NORTHWARD,
STRETCHING FROM THE DRIGGS AREA TO THE SALMON AND CHALLIS AREAS
FOR ELEVATIONS BELOW 6000 FEET. GROUND TEMPERATURES WILL HOVER
AROUND THE FREEZING MARK AGAIN DURING THE AFTERNOON AS
TEMPERATURES REACH HIGHS DURING THE MORNING HOURS, THEN START A
COOL DOWN. THE COLDER TEMPERATURES THIS AFTERNOON ADD ANOTHER
RISK OF ROADS BECOMING ICY. TOTAL SNOW AMOUNTS FOR MONDAY AND
MONDAY NIGHT WILL RANGE FROM 1 TO 3 INCHES IN THE SNAKE RIVER
PLAIN. FOR THE MOUNTAINS...SNOW ACCUMULATION OF 4 TO 12 INCHES
WILL MAKE TRAVEL THROUGH MOUNTAIN PASSES DIFFICULT DURING THE SAME
TIME PERIOD. THE HIGHER PEAKS OF THE SAWTOOTH RECREATION AREA AND
THE NORTHERN WASATCH COULD SEE 1 TO 2 FEET OF SNOW. ADDITIONAL
SNOW IS EXPECTED TUESDAY AND TUESDAY NIGHT, MORE THAN WHAT IS
EXPECTED FOR TODAY AND TONIGHT. SNOW MAY START TO FINALLY TAPER
OFF DURING THE AFTERNOON WEDNESDAY.


UPPER SNAKE HIGHLANDS-CARIBOU HIGHLANDS-
WASATCH MOUNTAINS/IDAHO PORTION-
INCLUDING THE CITIES OF ST. ANTHONY, ASHTON, ISLAND PARK, DRIGGS,
VICTOR, HENRY, SODA SPRINGS, DOWNEY, LAVA HOT SPRINGS,
AND MONTPELIER
412 AM MST MON JAN 9 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MST
THURSDAY...

* IMPACTS...HEAVY SNOWFALL RATES WILL MAKE IT DIFFICULT FOR ROAD
  CREWS TO KEEP EVEN MAJOR HIGHWAYS CLEAR OF SNOW. A THREAT OF
  FREEZING RAIN MEANS THAT ROADS COULD BE ICY AND DANGEROUS.
  EXPECT DIFFICULT TRAVELING CONDITIONS AND POSSIBLE ROAD CLOSURES
  FOR HIGHWAYS THAT HAVE HIGH ELEVATION PASSES GOING INTO WYOMING
  AND MONTANA. BLOWING AND DRIFTING SNOW COULD QUICKLY COVER
  RECENTLY PLOWED ROADWAYS.

* TIMING...HEAVY SNOW WILL DEVELOP THIS EVENING AND CONTINUE
  THROUGH WEDNESDAY. IN THE NEXT 24 HOURS, THE HEAVIEST SNOWFALL
  RATES WILL OCCUR DURING THIS AFTERNOON.

* SNOW ACCUMULATIONS...2 TO 8 INCHES IN ELEVATIONS BELOW 6500
  FEET. 6 TO 18 INCHES ARE POSSIBLE IN THE HIGH COUNTRY ABOVE THAT
  ELEVATION. HEAVIER AMOUNTS OCCUR NEAR THE WYOMING BORDER.

* CONFIDENCE...HIGH CONFIDENCE IN SNOWFALL AMOUNTS ABOVE 6500 FEET
  MSL. LOW CONFIDENCE BELOW 6500 FEET MSL DUE TO RISING SNOW
  LEVELS THROUGH THE PERIOD.

* LOCATIONS...ISLAND PARK...DRIGGS...SWAN VALLEY...SODA
  SPRINGS...MONTPELIER.

PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR
HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR
OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL
MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST
TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD AND WATER IN YOUR VEHICLE
IN CASE OF AN EMERGENCY.



							

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