Quantitative Precipitation Forecast
Issued by NWS

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FOUS11 KWBC 220737
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
336 AM EDT THU SEP 22 2016

VALID 12Z THU SEP 22 2016 - 12Z SUN SEP 25 2016

DAYS 1-3...

NORTHERN/CENTRAL ROCKIES

A POTENT AND WELL DEFINED UPPER LEVEL LOW CURRENTLY OVER NORTHERN
CALIFORNIA IS FORECAST TO SLOWLY TRACK EASTWARD ACROSS THE GREAT
BASIN BEFORE LIFTING NORTHEASTWARD ACROSS THE NORTHERN ROCKIES BY
FRIDAY NIGHT.  STRONG COLD AIR ADVECTION ON THE BACK SIDE OF THIS
SYSTEM WITH 700MB TEMPERATURES FALLING TO NEAR -3C WILL CAUSE SNOW
LEVELS TO DROP TO NEAR 7500 FEET BY FRIDAY MORNING ACROSS UTAH.
THESE LOWER SNOW LEVELS SHOULD REACH WYOMING AND MONTANA BY FRIDAY
NIGHT AS THE CORE OF THE UPPER LOW PASSES BY.  MANY OF THESE AREAS
WILL BEGIN AS RAIN EARLIER IN THE PERIOD BEFORE TRANSITIONING TO
SNOW.  THE NORTHERN WASATCH, UINTAS, WIND RIVER, TETONS, BIG HORN,
AND ABSAROKA RANGES ARE FORECAST TO RECEIVE THE GREATEST SNOWFALL
TOTALS, WITH LOCAL AMOUNTS OF 6+ INCHES POSSIBLE FOR THE HIGHEST
ELEVATIONS.  THE QPFPFD HAS ADDITIONAL INFORMATION ON THE
WIDESPREAD RAINFALL EXPECTED FROM THIS LOW.

THE PROBABILITY OF SIGNIFICANT ICING IS LESS THAN 10 PERCENT.

HAMRICK



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