Prognostic Meteorological Discussion
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000
FXUS01 KWBC 312056
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
356 PM EST SAT JAN 31 2015

VALID 00Z SUN FEB 01 2015 - 00Z TUE FEB 03 2015

...IMPACTS WILL BE SIGNIFICANT AND WIDESPREAD WITH A WINTER STORM
SPINNING UP OVER THE CENTRAL U.S. THIS WEEKEND...

THE STAGE WILL BE SET FOR A WIDESPREAD PRECIPITATION EVENT ACROSS
THE CENTRAL AND EASTERN U.S. THIS WEEKEND AS ARCTIC AIR PLUNGING
OUT OF CANADA CLASHES WITH WARM AND MOIST AIR LIFTING OUT OF THE
GULF OF MEXICO.  A SURFACE LOW SPINNING UP IN THE MIDDLE
MISSISSIPPI VALLEY SATURDAY NIGHT WILL HELP FOCUS ORGANIZED AREAS
OF PRECIPITATION AS IT TRACKS THROUGH THE OHIO VALLEY SUNDAY AND
INTO THE NORTHERN MID-ATLANTIC REGION ON MONDAY.  AN AXIS OF
MODERATE TO HEAVY SNOWS WILL DEVELOP TO THE NORTH OF FRONTAL
BOUNDARY EXTENDING EASTWARD FROM THE LOW...RESULTING A WIDE SWATH
OF ACCUMULATING SNOWS EXTENDING FROM NEBRASKA ALL THE WAY TO
SOUTHERN NEW ENGLAND.  JUST TO THE SOUTH OF THE SNOW
AXIS...MARGINAL TEMPERATURES COULD LEAD TO A TRANSITION ZONE OF
SLEET AND FREEZING RAIN.  FARTHER SOUTH...A COLD FRONT TRAILING
FROM THE DEEPENING SURFACE LOW WILL TRIGGER HEAVY RAINS AND A FEW
THUNDERSTORMS WHILE IT DROPS THROUGH THE SOUTHERN PLAINS AND
PUSHES FROM THE LOWER MISSISSIPPI VALLEY TO THE SOUTHEAST.

ELSEWHERE ACROSS THE NATION...STRONG WINDS AND HEAVY SNOWS ACROSS
MAINE WILL CONTINUE TO DIMINISH AS A DEEP COASTAL LOW OFFSHORE
LIFTS INTO THE CANADIAN MARITIMES.  A WEAK COLD FRONT APPROACHING
THE WEST COAST WILL INCREASE RAIN AND SNOW CHANCES FOR THE PACIFIC
NORTHWEST AND NORTHERN ROCKIES ON SUNDAY.  MEANWHILE...THE HEAVY
PRECIPITATION EVENT IN THE SOUTHWEST WILL CONTINUE TO WIND DOWN AS
AN UPPER TROUGH EDGES OUT OF THE REGION AND THE MOISTURE SUPPLY
GETS SHUT OFF.


GERHARDT


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
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