Prognostic Meteorological Discussion
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FXUS01 KWBC 282006
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
305 PM EST SAT FEB 28 2015

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

...SNOW AND ICE EVENT SETTING UP FROM THE MIDDLE MISSISSIPPI
VALLEY TO THE MID-ATLANTIC REGION...

...UNSETTLED WEATHER WILL CONTINUE ACROSS CALIFORNIA AND THE FOUR
CORNERS STATES...

...HEAVY RAIN AND THUNDERSTORMS EXPECTED FOR THE LOWER MISSISSIPPI
VALLEY...

WIDESPREAD PRECIPITATION IS EXPECTED TO DEVELOP OVER MUCH OF
EASTERN HALF OF THE NATION THE NEXT FEW DAYS AS A DISTURBANCE
CROSSES THE NORTHERN TIER AND MOISTURE SURGES NORTHWARD OUT OF THE
GULF OF MEXICO.  AN ARCTIC AIRMASS INITIALLY IN PLACE WILL KEEP
TEMPERATURES LOW ENOUGH TO SUPPORT A WIDE AXIS OF LIGHT TO
MODERATE SNOW ACCUMULATIONS FROM THE MIDDLE MISSISSIPPI VALLEY TO
THE NORTHERN MID-ATLANTIC STATES.  THE WARM GULF OF MEXICO AIR
MOVING IN OVER SLOW-TO-ERODE ARCTIC AIR WILL SET UP A ZONE OF
SLEET AND FREEZING RAIN...ESPECIALLY JUST EAST OF CENTRAL AND EVEN
SOUTHERN APPALACHIANS.

UNSETTLED WEATHER WILL CONTINUE ACROSS CALIFORNIA AND THE FOUR
CORNERS STATES THIS WEEKEND AND INTO EARLY NEXT WEEK AS AN UPPER
LOW CLOSES OFF OVER THE SOUTHWESTERN U.S..  PACIFIC MOISTURE
STREAMING INLAND...IMPULSES OF ENERGY EMBEDDED WITHIN THE FLOW
ALOFT...AND OROGRAPHIC EFFECTS WILL ALL HELP PRODUCE SOME HEFTY
PRECIPITATION TOTALS ALONG THE FAVORED SLOPES OF THE TERRAIN.
CONDITIONS WILL BE COLD ENOUGH FOR ACCUMULATING SNOW ACROSS MUCH
OF SIERRA NEVADA RANGES...THE GREAT BASIN...AND THE CENTRAL TO
SOUTHERN ROCKIES...WITH OVER A FOOT OF SNOW EXPECTED IN THE SAN
JUAN RANGES OF SOUTHWESTERN COLORADO.

PRECIPITATION WILL BEGIN TO FOCUS ALONG A FRONTAL BOUNDARY
STRENGTHENING IN THE SOUTHERN TIER OF THE NATION ON MONDAY.
PLENTY OF MOISTURE LIFTING NORTH OUT OF THE GULF OF MEXICO WILL
FUEL MODERATE TO HEAVY RAINS AND THUNDERSTORMS OVER THE LOWER
MISSISSIPPI VALLEY.


GERHARDT



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