Quantitative Precipitation Forecast
Issued by NWS

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FOUS11 KWBC 060851
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
451 AM EDT FRI MAY 06 2016

VALID 12Z FRI MAY 06 2016 - 12Z MON MAY 09 2016


DAYS 1-3...

...SIERRA/NORTHERN AND CENTRAL ROCKIES...

A SPRAWLING UPPER LOW IS EXPECTED TO DRIFT NORTHEASTWARD FROM CA
EARLY FRI TO THE NORTHERN PLAINS BY EARLY MON...YIELDING
WIDESPREAD PRECIPITATION AND HIGH ELEVATION SNOWS ACROSS THE
WESTERN U.S. THIS PERIOD.  SNOW LEVELS MAY DROP AS LOW AS 7500 FT
IN SOME LOCATIONS...HOWEVER THE GREATER POTENTIAL FOR HEAVY
ACCUMULATIONS WILL LIKELY REMAIN CONFINED TO HIGHER ELEVATIONS.
SOME OF THE HEAVIEST SNOWS OF PERIOD ARE EXPECTED TO CENTER ALONG
THE WIND RIVER RANGE OF NORTHWESTERN WY.  AS THE LOW DRIFTS ACROSS
SOUTHERN CA INTO THE GREAT BASIN/SOUTHWEST...STRONG UPPER
DIVERGENCE AFFORDED BY FAVORABLE UPPER JET DYNAMICS ALONG WITH
VIGOROUS EASTERLY FLOW BEHIND A FRONTAL BOUNDARY DROPPING TO THE
SOUTH ARE EXPECTED TO CONTRIBUTE TO HEAVY ACCUMULATIONS THERE LATE
FRI INTO SAT.  AS THE CENTER CONTINUES TO DRIFT NORTHEAST ACROSS
THE CENTRAL ROCKING INTO THE HIGH PLAINS...MOISTURE AND MID LEVEL
ENERGY ROTATING AROUND THE BACKSIDE ARE EXPECTED TO SUPPORT SNOWS
ACROSS THE UINTAS OF NORTHERN UT AND THE RANGES OF THE WESTERN
CO...INCLUDING THE SAN JUANS...WITH LOCALLY HEAVY ACCUMULATIONS
POSSIBLE ON SUN INTO EARLY MON.

THE PROBABILITY OF SIGNIFICANT ICING IS LESS THAN 10 PERCENT.

PEREIRA



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