Quantitative Precipitation Forecast
Issued by NWS

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FOUS11 KWBC 240635
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
235 AM EDT SAT SEP 24 2016

VALID 12Z SAT SEP 24 2016 - 12Z TUE SEP 27 2016

DAYS 1-3...

...NORTHERN/CENTRAL ROCKIES...

SNOW WILL CONTINUE TO BE EXPECTED TO WIND DOWN IN THE UT UINTAS
AND RANGES OF WESTERN WY AND CONTINUE FOR A WHILE IN THE BIGHORN
MTNS OF WY/ADJACENT MT ON SATURDAY AS AN ANOMALOUS UPPER LOW LIFTS
NORTHEASTWARD OUT OF THE ROCKIES ON TO THE NORTHERN PLAINS.  THE
COMBINATION OF LOWERING TEMPERATURES/SNOW LEVELS AND ENHANCED LIFT
FROM STRONG DIVERGENCE AT THE BASE OF THE UPPER LEVEL CIRCULATION
WILL ALLOW FOR PERIODS OF SNOW WHILE THE 700MB TRACKS THROUGH
NORTHEASTERN WYOMING SAT MORNING...AIDED BY 700 MB CONVERGENCE AND
DEFORMATION...WITH ADDITIONAL LIFT IN FAVORED UPSLOPE AREAS. SNOW
ACROSS THE ROCKIES SHOULD BEGIN TO DIMINISH BY SATURDAY EVENING AS
DRYING ALOFT DEVELOPS DOWNSTREAM FROM A GREAT BASIN RIDGE...WITH
SINKING DEVELOPING ALOFT AS WELL.

A CONSENSUS BLEND OF CLUSTERED MODEL GUIDANCE INDICATED THE
GREATEST PROBABILITIES FOR SNOW WILL FOCUS ALONG THE WY PORTION OF
THE BIGHORNS.  ACCUMULATING SNOW WILL ALSO BE POSSIBLE IN THE
HIGHER ELEVATIONS OF NORTH CENTRAL COLORADO...AND UINTA MOUNTAINS
OF NORTHERN UTAH.

THE PROBABILITY OF SIGNIFICANT ICING IS LESS THAN 10 PERCENT.

PETERSEN



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