944  
FXUS01 KWBC 250801  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
400 AM EDT THU OCT 25 2018  
 
VALID 12Z THU OCT 25 2018 - 12Z SAT OCT 27 2018  
 
...THE STAGE IS SET FOR THE FIRST NOR'EASTER OF THE SEASON TO  
DEVELOP ALONG THE EAST COAST BY SATURDAY...  
 
...UNSETTLED WEATHER TO CONTINUE FOR THE NORTHWESTERN U.S. INTO  
THE NORTHERN PLAINS AND THE MIDWEST...  
 
WITH THE SYNOPTIC PATTERN CONTINUES TO FAVOR AN UPPER-LEVEL TROUGH  
OVER THE EASTERN U.S., THE STAGE IS SET FOR THE FIRST NOR'EASTER  
OF THE SEASON TO DEVELOP ALONG THE EAST COAST BY SATURDAY. THE  
FRONTAL WAVE THAT HAS BEEN NEARLY STATIONARY OFF THE TEXAS COAST  
FOR THE PAST FEW DAYS IS BEING ENERGIZED BY UPPER-LEVEL MOISTURE  
ORIGINATED FROM FORMER HURRICANE WILLA AS WELL AS A MODEST  
UPPER-LEVEL TROUGH MOVING INTO THE CENTRAL/SOUTHERN PLAINS. UNDER  
THIS SYNOPTIC SETUP, THE FRONTAL WAVE WILL ADOPT A STEADY EASTWARD  
MOTION ALONG THE GULF COAST THROUGH FRIDAY WHILE GRADUALLY  
EXPANDING IN SIZE. SHOWERS AND THUNDERSTORMS WILL BE WIDESPREAD  
ACROSS THE LOWER MISSISSIPPI VALLEY TODAY, MOVING INTO MUCH OF THE  
SOUTHERN U.S. ON FRIDAY AHEAD OF THE LOW PRESSURE CENTER TOGETHER  
WITH INCREASING NORTHEASTERLY WINDS. BY FRIDAY NIGHT, MUCH OF THE  
MID-ATLANTIC INTO THE APPALACHIANS WILL BE SEE RAIN, WHICH COULD  
BECOME HEAVY AT TIMES OVERNIGHT AS THE LOW PRESSURE SYSTEM BEGINS  
TO INTENSIFY MORE RAPIDLY NEAR THE MID-ATLANTIC COAST. COASTAL  
SECTIONS FROM THE MID-ATLANTIC INTO SOUTHERN NEW ENGLAND WILL  
LIKELY SEE THE STRONGEST WINDS FRIDAY NIGHT INTO SATURDAY MORNING  
WITH WEATHER CONDITIONS TYPICAL OF A NOR'EASTER. CONDITIONS  
SHOULD BE MUCH CALMER IN THE INTERIOR SECTIONS BUT EXPECT A  
GENERAL AREA OF RAIN TO SPREAD EASTWARD FROM THE PLAINS STATE  
TODAY INTO THE OHIO VALLEY ON FRIDAY.  
 
ACROSS THE PACIFIC NORTHWEST, A STRONG JET STREAM AS WELL AS  
MULTIPLE SURFACE FRONTS WILL LEAD TO CONTINUED CHANCES OF RAIN.  
THE HEAVIEST PRECIPITATION WILL OCCUR IN THE COASTAL RANGES AND  
THE CASCADES, AND MOST IS EXPECTED TO FALL AS RAIN, THOUGH THE  
HIGHER PEAKS COULD SEE SOME SNOW. BY SATURDAY MORNING, SOME OF  
THE RAIN WILL MAKE ITS WAY INTO THE NORTHERN HIGH PLAINS AS AN  
ALBERTA CLIPPER DEVELOPS.  
 
THE ONGOING TEMPERATURE PATTERN OF WARMER THAN AVERAGE IN THE  
WESTERN U.S. AND COLDER THAN AVERAGE IN THE EASTERN U.S. (WITH THE  
EXCEPTION OF FLORIDA) WILL CONTINUE THROUGH THE END OF THE WEEK.  
ON THE WESTERN SIDE OF THE STRENGTHENING LOW PRESSURE SYSTEM WITH  
CONSIDERABLE CLOUDS AND RAIN, PARTS OF THE CAROLINAS AND WESTERN  
VIRGINIA WILL ONLY SEE TEMPERATURES REACHING THE 40S ON FRIDAY,  
WHICH COULD SET RECORDS FOR COLD HIGH TEMPERATURES.  
 
KONG/TATE  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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