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458
FOUS11 KWBC 230627
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
226 AM EDT THU OCT 23 2014

VALID 12Z THU OCT 23 2014 - 12Z SUN OCT 26 2014


DAYS 1-3...

...NORTHERN WA CASCADES...

RATHER PERSISTENT SWRLY ONSHORE FLOW DIRECTED INTO THE PAC NW WILL
KEEP THE REGION SATURATED AND SOMEWHAT WET ON THURS BUT ONLY
MODEST UPPER HEIGHT FALLS BEHIND THE SURFACE COLD FRONT SHOULD
TRANSLATE TO SOME HEAVY SNOW OVER THE NRN WA CASCADES. THE UPPER
PATTERN WILL BE TRANSITIONING ON FRI INTO SAT... AS UPPER HEIGHTS
STEADILY INCREASE ACROSS THE REGION BEFORE A VERY AMPLIFIED AND
POTENT UPPER TROUGH/CLOSED LOW/PAC MOISTURE TRANSPORT ARRIVE.
THESE BUILDING HEIGHTS AHEAD OF THE DEEPENING SYSTEM WILL KEEP ANY
THREAT FOR ACCUMULATING HEAVY SNOWS ONCE AGAIN CONFINED TO THE
NORTHERN WA CASCADES.

THE PROBABILITY OF SIGNIFICANT ICING IS LESS THAN 10 PERCENT.

MUSHER

$$






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