Prognostic Meteorological Discussion
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000
FXUS01 KWBC 261959
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
259 PM EST SUN FEB 26 2017

VALID 00Z MON FEB 27 2017 - 00Z WED MAR 01 2017

...MORE SNOW FOR THE WESTERN U.S., AND RAIN AND THUNDERSTORMS
RETURN TO THE GULF COAST AND SOUTHEASTERN U.S....

AS A STRONG AREA OF HIGH PRESSURE MOVES EASTWARD AND OFF THE
ATLANTIC COAST MONDAY, EXPECT WARM RETURN FLOW FROM THE GULF OF
MEXICO TO BEGIN ADVECTING MOISTURE ACROSS MUCH OF THE SOUTHERN
PLAINS AND THE DEEP SOUTH. THIS WARM MOISTURE WILL COMBINE WITH A
LOW PRESSURE SYSTEM MOVING ACROSS TEXAS AND THE SOUTHERN PLAINS.
NUMEROUS SHOWERS AND STORMS ARE LIKELY TO DEVELOP FROM THE LOWER
MISSISSIPPI VALLEY TO THE OHIO VALLEY AND MID ATLANTIC DURING THE
FIRST HALF OF THE WORK WEEK AS THE ASSOCIATED WARM FRONT LIFTS
NORTHWARD. SOME LOCATIONS WILL RECEIVE IN EXCESS OF AN INCH OF
RAINFALL BY TUESDAY MORNING, ESPECIALLY FROM SOUTHERN ARKANSAS TO
NORTHERN ALABAMA. RAIN AND SNOW WILL ALSO EXPAND INTO THE GREAT
LAKES REGION BY MID WEEK AS THE MOISTURE SURGE MAKES IT INTO THIS
REGION.

ANOTHER LOW PRESSURE SYSTEM AND ACCOMPANYING UPPER LEVEL
DISTURBANCE HAS NOW MADE LANDFALL ALONG THE PACIFIC NORTHWEST
COAST, AND WILL CONTINUE TO MOVE INLAND, REACHING THE NORTHERN
ROCKIES BY MONDAY AFTERNOON. SEVERAL OTHER SMALLER SYSTEMS WILL
ALSO MOVE INLAND OVER THE NEXT COUPLE OF DAYS AND INTERACT WITH
THIS SYSTEM. MOISTURE FROM THIS SYSTEM WILL FALL AS SNOW, WITH
WIDESPREAD SNOW EXPECTED FROM THE PACIFIC NORTHWEST TO THE
NORTHEAST ROCKIES, AND SOUTHWARD TO THE CENTRAL GREAT BASIN AND
CENTRAL ROCKIES OVER THE NEXT COUPLE OF DAYS. WINTER WEATHER
ADVISORIES ARE CURRENTLY IN EFFECT FOR PORTIONS OF THIS AREA, WITH
UP TO A FOOT OF SNOW POSSIBLE IN THE HIGHEST ELEVATIONS. SNOW WILL
BEGIN TAPERING OFF THROUGH THE DAY TUESDAY AS HIGH PRESSURE MOVES
IN BEHIND THE EXITING SYSTEM.

FINALLY, YET ANOTHER LOW PRESSURE SYSTEM MOVING INLAND ALONG THE
SOUTHERN CALIFORNIA COAST TONIGHT WILL LEAD TO SCATTERED RAIN
SHOWERS ACROSS PORTIONS OF SOUTHERN CALIFORNIA THROUGH MONDAY, AND
THEN A MIX OF RAIN AND SNOW ACROSS MUCH OF THE SOUTHWEST U.S. AND
SOUTHERN ROCKIES MONDAY THROUGH TUESDAY. WINTER STORM WATCHES HAVE
BEEN POSTED FOR THE MOUNTAINS IN CENTRAL ARIZONA FOR THIS EVENT,
WITH UP TO FOOT OF SNOW EXPECTED ABOVE 6000 FEET.

WIX


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_WBG.PHP
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