Quantitative Precipitation Forecast
Issued by NWS

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FOUS11 KWBC 232021
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
420 PM EDT MON APR 23 2018

VALID 00Z TUE APR 24 2018 - 00Z FRI APR 27 2018

DAYS 1-3...

...NORTHERN ROCKIES TO ADJACENT HIGH PLAINS...

LATE SEASON SNOWFALL WILL CONTINUE WITH A WELL-DEFINED SHORTWAVE
DROPPING THROUGH THE NORTHERN ROCKIES MONDAY NIGHT.  THE SYSTEM
WILL CONTINUE TO CAPITALIZE ON ENHANCED UPSLOPE FLOW, BRINGING
PERIODS OF HEAVY SNOW TO SOUTHEASTERN MONTANA AND NORTHEASTERN
WYOMING, BEFORE SINKING SOUTH INTO THE CENTRAL ROCKIES AND PLAINS
ON TUESDAY.  THE GREATEST CHANCE FOR SNOWFALL ACCUMULATIONS TO
EXCEED 8-INCHES WILL BE ACROSS THE BLACK HILLS, WHERE WPC
PROBABILITIES ARE SHOWING A MODERATE RISK.  SNOW WILL ALSO BE
POSSIBLE WITH AN UPSTREAM SHORTWAVE REACHING MONTANA ON WEDNESDAY,
BUT WPC PROBABILITIES CURRENTLY KEEP THE PROBABILITY OF SNOWFALL
ACCUMULATIONS TO EXCEED 4-INCHES LESS THAN 10 PERCENT.

THE PROBABILITY OF ICING GREATER THAN 0.25 INCHES IS LESS THAN 10
PERCENT FOR DAYS 1-3.


GERHARDT





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