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Winter Weather Forecast Discussion
 
(Caution: Version displayed is not the latest version. - Issued 2025Z Sep 30, 2014)
 
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Geographic Boundaries -  Map 1: Color  Black/White       Map 2: Color  Black/White


PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
425 PM EDT TUE SEP 30 2014

VALID 00Z WED OCT 01 2014 - 00Z SAT OCT 04 2014


DAY 1...

...WESTERN WY...

DESPITE A TIGHTLY CLOSED MID TO UPPER LOW DEPARTING DOWNSTREAM
INTO THE NRN PLAINS... ANOTHER DYNAMIC AND AMPLIFYING SHORT WAVE
TROUGH WILL SLIDE FROM THE NRN TO CENTRAL ROCKIES. UPPER HEIGHTS
WILL REMAIN 1.5 STANDARD DEV BELOW AVG WITH THE PASSING OF AN
ASSOCIATED JET STREAK AND THIS JET CORES FAVORABLE LEFT EXIT
REGION DYNAMICS SHOULD FUEL ENHANCED VERTICAL LIFT/OROGRAPHICS.
FREEZING LEVELS WILL ALSO DROP WHICH SHOULD LOWER SNOW LEVELS AND
THE NAM/ECMWF PINPOINT 1/2 TO 1 INCH QPF AMOUNTS ACROSS PARTS OF
THE ABSAROKA/WIND RIVER RANGES. WPC HEAVY SNOW PROBS ARE FOR 4
INCHES AND MAINLY ABOVE 8000 TO 9000 FEET.

THE PROBABILITY OF SIGNIFICANT ICING IS LESS THAN 10 PERCENT.


DAYS 2 AND 3...

THE PROBABILITY OF HEAVY SNOW AND/OR SIGNIFICANT ICING IS LESS
THAN 10 PERCENT.


MUSHER