Prognostic Meteorological Discussion
Issued by NWS

000
FXUS01 KWBC 270808
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
307 AM EST FRI FEB 27 2015

VALID 12Z FRI FEB 27 2015 - 12Z SUN MAR 01 2015

...HEAVY SNOW FOR PARTS OF THE CENTRAL/SOUTHERN ROCKIES...

...TEMPERATURES WILL BE 20 TO NEAR 40 DEGREES BELOW AVERAGE OVER
THE CENTRAL AND SOUTHERN PLAINS...

TEMPERATURES WILL BE 15 TO 30 DEGREES BELOW AVERAGE FROM THE
MIDDLE MISSISSIPPI VALLEY TO THE OHIO VALLEY AND THE NORTHERN
MID-ATLANTIC...

COLD HIGH PRESSURE OVER THE MIDDLE MISSISSIPPI VALLEY WILL MOVE
EASTWARD TO THE MID-ATLANTIC BY SATURDAY EVENING.  TEMPERATURES
EAST OF THE ROCKIES WILL BE BELOW AVERAGE FOR THE NEXT FEW DAYS.
IN ADDITION, A CLOSED UPPER-LEVEL LOW OVER THE PACIFIC NORTHWEST
WILL MOVE SOUTHWARD TO THE GREAT BASIN BY SATURDAY.  THE ENERGY
WILL TRIGGER COASTAL RAIN AND HIGHER ELEVATION SNOW OVER PARTS OF
THE PACIFIC NORTHWEST THAT WILL SLOWLY MOVE SOUTHWARD INTO
SOUTHERN CALIFORNIA AND THE GREAT BASIN BY SATURDAY.

MEANWHILE, CIRCULATION AROUND THE AREA OF HIGH PRESSURE WILL AID
IN PRODUCING UPSLOPE FLOW WHICH WILL AID IN PRODUCING SNOW OVER
PARTS OF THE CENTRAL/SOUTHERN ROCKIES AND HIGH PLAINS ON FRIDAY
MORNING.  AS THE HIGH MOVES EASTWARD RETURN FLOW AROUND THE HIGH
WILL PULL MOISTURE OFF THE GULF OF MEXICO.  AS THE MOISTURE MOVES
FARTHER INLAND, THE SNOW OVER THE CENTRAL/SOUTHERN HIGH PLAINS
WILL EXPAND EASTWARD OVER PARTS OF THE CENTRAL PLAINS/MIDDLE
MISSISSIPPI VALLEY ON SATURDAY.  RAIN WILL ALSO DEVELOP OVER PARTS
OF THE LOWER RIO GRANDE VALLEY/SOUTHERN PLAINS ON FRIDAY AFTERNOON
INTO SATURDAY.  IN BETWEEN THE AREAS OF RAIN AND SNOW, A REGION OF
RAIN/FREEZING RAIN WILL DEVELOP OVER PARTS OF THE SOUTHERN PLAINS
LATE FRIDAY NIGHT INTO SATURDAY.  ELSEWHERE, THERE WILL BE AREAS
OF RAIN OVER PARTS OF SOUTHERN FLORIDA THROUGH SATURDAY.


ZIEGENFELDER


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