Prognostic Meteorological Discussion
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FXUS01 KWBC 252015
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
314 PM EST SAT FEB 25 2017

VALID 00Z SUN FEB 26 2017 - 00Z TUE FEB 28 2017

...STORM SYSTEM TO AFFECT PORTIONS OF THE MID ATLANTIC SEABOARD
AND NEW ENGLAND THIS AFTERNOON AND TONIGHT...

...SNOW EXPECTED FOR THE GREAT LAKES THROUGH SUNDAY...

...MORE PRECIPITATION, GENERALLY IN THE FORM OF SNOW, EXPECTED FOR
THE PACIFIC NORTHWEST AND TO FINISH OUT THE WEEKEND...

A STRONG SURFACE LOW PRESSURE SYSTEM WILL CONTINUE TO LIFT
NORTHEAST THROUGH EASTERN CANADA THIS AFTERNOON AND OVERNIGHT,
WITH AN ASSOCIATED COLD FRONT EXPECTED TO SWEEP ACROSS THE MID
ATLANTIC SEABOARD AND MUCH OF NEW ENGLAND. THIS WILL RESULT IN
SHOWERS AND THUNDERSTORMS ALONG THE ATLANTIC COAST THROUGH THIS
EVENING, LINGERING INTO THE OVERNIGHT HOURS IN NEW ENGLAND. THE
STORM PREDICTION CENTER HAS MUCH OF THIS AREA IN SLIGHT RISK FOR
THIS AFTERNOON, WITH STORMS HAVING THE POTENTIAL TO PRODUCE
DAMAGING WINDS AND HAIL. PLEASE REFER TO THE STORM PREDICTION
WEBSITE FOR MORE INFORMATION.

IN THE WAKE OF THE COLD FRONT, MOST LOCATIONS ACROSS THE EASTERN
HALF OF THE U.S. ARE SEEING THE RETURN OF MORE SEASONABLE
TEMPERATURES BY FEBRUARY STANDARDS. EXPECT THESE COOLER
TEMPERATURES TO REMAIN IN PLACE FOR THE NEXT FEW DAYS. A LARGE
HIGH PRESSURE RIDGE ACROSS MUCH OF THE SOUTHEAST WILL ALSO KEEP
CONDITIONS DRY AND MOSTLY CLEAR INTO SUNDAY.

BY SUNDAY AFTERNOON, HOWEVER, RETURN FLOW BEHIND THE EXITING HIGH
PRESSURE, COUPLED WITH AN INCOMING LOW PRESSURE SYSTEM, WILL
ADVECT ENOUGH MOISTURE FROM THE GULF OF MEXICO TO GENERATE
SCATTERED SHOWERS AND THUNDERSTORMS FROM EASTERN TEXAS TO LOWER
MISSISSIPPI VALLEY. RAIN AND STORMS WILL THEN SPREAD FROM THE
LOWER MISSISSIPPI VALLEY ACROSS MUCH OF THE SOUTHEAST AND
TENNESSEE VALLEY MONDAY.

ANOTHER LOW PRESSURE SYSTEM PASSING NEAR THE UPPER GREAT LAKES
WILL BRING SNOW ACROSS THE REGION TONIGHT THROUGH SUNDAY.

FINALLY, YET ANOTHER LOW PRESSURE SYSTEM IS POISED TO IMPACT THE
PACIFIC NORTHWEST LATE THIS WEEKEND, CONTINUING INTO THE FIRST
PART OF THE WORKWEEK AS THE LOW MOVES INLAND. THIS SYSTEM WILL
BRING A WINTRY MIX OF RAIN AND SNOW TO MUCH OF THE PACIFIC
NORTHWEST COAST SUNDAY, TRANSITIONING TO ALL SNOW INLAND AND
QUICKLY SPREADING ACROSS THE INTERMOUNTAIN WEST. SNOW WILL THEN
CONTINUE TO SPREAD EASTWARD ACROSS THE ROCKY MOUNTAINS THROUGH AT
LEAST MONDAY. WINTER WEATHER ADVISORIES ARE IN EFFECT FOR MANY
LOCATIONS ALONG THE PACIFIC NORTHWEST COAST FOR POTENTIAL SNOWFALL
IMPACTS SUNDAY.

WIX


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