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| 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.
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| 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.
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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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