Quantitative Precipitation Forecast
Issued by NWS

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FOUS11 KWBC 290816
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
416 AM EDT MON SEP 29 2014

VALID 12Z MON SEP 29 2014 - 12Z THU OCT 02 2014


DAYS 1 THROUGH 3...


...CENTRAL AND NORTHERN ROCKIES...

A CLOSED 500MB LOW OVER THE GREAT BASIN IS FORECAST TO EVOLVE INTO
A LONG WAVE TROUGH ACROSS THE ROCKIES AND WESTERN HIGH PLAINS BY
TUESDAY.  DYNAMIC COOLING ASSOCIATED WITH THE STEEP LAPSE RATES OF
THIS FEATURE ALLOWS SNOW LEVELS TO DROP TO NEAR 8000 FEET OVER
WESTERN WYOMING, NORTHERN MONTANA, AND THE UINTA RANGE OF UTAH,
AND NEAR 9000 FEET FOR THE COLORADO ROCKIES.  OWING TO LIMITED
MOISTURE AND QPF ON THE BACK SIDE OF THE UPPER LOW, SNOWFALL
AMOUNTS ARE EXPECTED TO BE LIGHT, WITH PERHAPS UP TO 4 INCHES OVER
THE HIGHEST MOUNTAINS AND WHERE UPSLOPE FLOW IS MAXIMIZED.
HOWEVER, THESE AMOUNTS ARE CURRENTLY NOT WIDESPREAD ENOUGH TO
WARRANT A SLIGHT RISK FOR ANY OF THE THREE DAY PERIODS AT THIS
TIME.

THE PROBABILITY OF SIGNIFICANT ICING IS LESS THAN 10 PERCENT.

HAMRICK

$$





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