WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH LATE MONDAY NIGHT

Model Total Snowfall  ending Monday Evening Jan 9 2017

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
118 PM MST FRI JAN 6 2017

...HEAVY SNOW TO IMPACT WESTERN WYOMING SUNDAY MORNING THROUGH
MONDAY NIGHT...

.A TRANSITION FROM A VERY COLD ARCTIC AIR MASS AND LIGHT DRY SNOW
TO A RELATIVELY WARM PACIFIC WINTER SYSTEM WILL TAKE PLACE THIS
WEEKEND...LASTING THROUGH MONDAY NIGHT. LIGHT SNOW WILL BEGIN
ACROSS WESTERN WYOMING LATER SATURDAY NIGHT...BECOMING HEAVY AT
TIMES SUNDAY. THIS STORM SYSTEM WILL BE QUITE MOIST AND PRODUCE
SIGNIFICANT AMOUNTS OF HEAVY WET SNOW...ESPECIALLY FROM LATER
SUNDAY AFTERNOON INTO MONDAY EVENING BEFORE TAPERING OFF LATE
MONDAY NIGHT.


YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-STAR VALLEY-
SALT RIVER AND WYOMING RANGES-
INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL...
JACKSON...AFTON...ALPINE...STAR VALLEY RANCH...THAYNE
118 PM MST FRI JAN 6 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT
THROUGH LATE MONDAY NIGHT...

* TIMING...PERIODS OF LIGHT SNOW WILL DEVELOP SATURDAY NIGHT
  ACROSS WESTERN WYOMING AND CONTINUE THROUGH SUNDAY MORNING
  BEFORE INCREASING IN BREADTH AND INTENSITY LATER SUNDAY
  AFTERNOON. THE HEAVIEST SNOWFALL IS EXPECTED TO TAKE PLACE
  SUNDAY NIGHT AND LAST THROUGH MUCH OF THE DAY MONDAY.

* SNOW TOTALS...10 TO 18 INCHES IN THE VALLEYS. 0NE AND A HALF
  TO 3 FEET IN THE MOUNTAINS WITH THE GREATER AMOUNTS IN THE
  TETON AND GROS VENTRE RANGES.

* MAIN IMPACT...ROADS AND HIGHWAYS WILL BECOME SLICK AND SNOW
  PACKED.

* OTHER IMPACTS...THE VISIBILITY MAY OFTEN LOWER TO BELOW ONE
  HALF MILE IN HEAVY SNOWFALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW AND/OR BLOWING SNOW THAT MAY IMPACT TRAVEL. CONTINUE TO
MONITOR THE LATEST FORECASTS.