905  
FXUS01 KWBC 242010  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
309 PM EST SAT NOV 24 2018  
 
VALID 00Z SUN NOV 25 2018 - 00Z TUE NOV 27 2018  
 
...SIGNIFICANT WINTER STORM WILL BRING HEAVY SNOW AND POTENTIAL  
BLIZZARD CONDITIONS FROM THE CENTRAL PLAINS INTO THE GREAT LAKES  
TONIGHT THROUGH MONDAY...  
 
...HEAVY RAINFALL WILL IMPACT THE MID-ATLANTIC TO THE NORTHEAST  
THROUGH TONIGHT, WITH LIGHT ICE AND SNOW ACCUMULATIONS POSSIBLE  
FOR INTERIOR NEW ENGLAND...  
 
...WELL ABOVE NORMAL TEMPS ON SUNDAY ACROSS THE OHIO VALLEY AND  
MID-SOUTH TRANSITIONING TO WELL BELOW NORMAL BY MONDAY...  
 
...HEAVY PRECIPITATION RETURNS TO THE PACIFIC NORTHWEST BY  
MONDAY...  
 
A VIGOROUS SYSTEM IN THE UPPER LEVELS PUSHING ACROSS THE CENTRAL  
ROCKIES THIS AFTERNOON HAS INDUCED THE DEVELOPMENT OF A SURFACE  
LOW IN THE CENTRAL HIGH PLAINS. AS THIS LOW TRACKS NORTHEASTWARD  
THE NEXT FEW DAYS, A WINTER STORM WILL DEVELOP TONIGHT AND QUICKLY  
STRENGTHEN ON SUNDAY. HEAVY TO SIGNIFICANT SNOWFALL IS EXPECTED IN  
PARTS OF THE CENTRAL PLAINS AND MISSOURI RIVER VALLEY THROUGH  
SUNDAY, MOVING INTO THE GREAT LAKES LATER ON SUNDAY AND MONDAY. A  
SWATH OF 6+ INCH SNOWFALL TOTALS ARE EXPECTED, WITH LOCALLY HIGHER  
AMOUNTS UP TO A FOOT POSSIBLE. IN ADDITION TO HEAVY SNOW, STRONG  
WINDS WILL ACCOMPANY THIS SYSTEM RESULTING IN POTENTIAL BLIZZARD  
CONDITIONS AND DANGEROUS TRAVEL CONDITIONS TO END THE HOLIDAY  
WEEKEND. BLIZZARD AND WINTER STORM WARNINGS, ALONG WITH WINTER  
WEATHER ADVISORIES AND WINTER STORM WATCHES ARE IN EFFECT ACROSS  
THE CENTRAL PLAINS, AND EASTWARD INTO THE MIDDLE MISSISSIPPI  
VALLEY AND PARTS OF THE UPPER GREAT LAKES. PLEASE SEE  
WWW.WEATHER.GOV FOR ADDITION DETAILS ON WATCHES AND WARNINGS.  
 
ORGANIZED AND LOCALLY HEAVY RAINFALL WILL CONTINUE ON SUNDAY AHEAD  
OF A SURFACE LOW DRIFTING UP THE NORTHEAST U.S. COAST. IT IS A  
QUICK MOVING SYSTEM SO WIDESPREAD EXCESSIVE RAINFALL/FLASH  
FLOODING IS NOT EXPECTED, BUT WPC HAS HIGHLIGHTED PARTS OF THE  
MID-ATLANTIC TO SOUTHERN NEW ENGLAND WITHIN A MARGINAL RISK. MUCH  
OF THE PRECIPITATION SHOULD BE IN THE FORM OF RAIN, EXCEPT ACROSS  
PORTIONS OF WESTERN AND NORTHERN NEW ENGLAND WHERE LIGHT ICE OR  
SNOW ACCUMULATIONS ARE POSSIBLE AND WINTER WEATHER ADVISORIES ARE  
IN EFFECT. RAINFALL RETURNS AS WE START THE NEW WORK WEEK ACROSS  
THE MID-ATLANTIC AND NORTHEAST AHEAD OF THE STRONG COLD FRONT  
ASSOCIATED WITH THE CENTRAL U.S. WINTER STORM SYSTEM.  
 
WITH REGARDS TO TEMPERATURES ACROSS THE COUNTRY, LOCATIONS FROM  
THE GULF COAST TO THE OHIO VALLEY AND EASTWARD WILL SEE ABOVE TO  
WELL ABOVE NORMAL TEMPERATURES ON SUNDAY AS WARM AIR STREAMS AHEAD  
OF THE DEEP UPPER LEVEL LOW IN THE CENTRAL U.S.. BY MONDAY,  
TEMPERATURES ARE EXPECTED TO PLUMMET BEHIND THE STRONG COLD FRONT  
WITH THESE SAME LOCATIONS NOW LOOKING AT HIGHS ON MONDAY AS MUCH  
AS 10 TO 20 DEGREES BELOW NORMAL. BELOW NORMAL TEMPS SUNDAY AND  
MONDAY WILL ALSO EXTEND WESTWARD ACROSS THE CENTRAL STATES AS  
WELL, WITH AFTERNOON HIGHS 10 TO 20 OR EVEN 30 DEGREES BELOW  
NORMAL, ESPECIALLY ACROSS THE CENTRAL PLAINS INTO THE MIDWEST.  
 
OUT WEST, SURFACE HIGH PRESSURE REIGNS THROUGH THE WEEKEND BEFORE  
ANOTHER ROUND OF POTENTIALLY HEAVY PRECIPITATION BEGINS TO MOVE  
INTO THE PACIFIC NORTHWEST BY LATER SUNDAY INTO MONDAY.  
TEMPERATURES ACROSS THE WEST COAST STATES SHOULD BE NEAR OR ABOVE  
NORMAL, WITH BELOW NORMAL TEMPS EXPECTED IN THE INTERMOUNTAIN WEST.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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