262  
FXUS01 KWBC 160713  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
212 AM EST FRI NOV 16 2018  
 
VALID 12Z FRI NOV 16 2018 - 12Z SUN NOV 18 2018  
 
...EARLY SEASON WINTER STORM TO BRING SNOW, SLEET, AND FREEZING  
RAIN TO THE NORTHEAST WITH THE ADDITION OF GUSTY WIND AND COASTAL  
FLOODING...  
   
..HEAVY SNOW POSSIBLE FOR PARTS OF THE NORTHERN PLAINS
 
 
...AIR STAGNATION AND AIR QUALITY ALERTS FOR PARTS OF THE  
NORTHWEST AND CALIFORNIA...  
 
LOW PRESSURE ALONG THE NORTHEAST COAST WILL MOVE NORTHEASTWARD TO  
THE NORTHERN ATLANTIC BY SATURDAY EVENING. THE SYSTEM WILL  
PRODUCE COASTAL RAIN AND INTERIOR SNOW OVER PARTS OF THE  
NORTHEAST/NORTHERN MID-ATLANTIC WITH POCKETS OF RAIN/FREEZING RAIN  
ENDING BY FRIDAY EVENING. IN ADDITION, UPPER-LEVEL ENERGY OVER  
THE GREAT LAKES WILL MOVE QUICKLY EASTWARD OFF THE NORTHEAST COAST  
OVERNIGHT FRIDAY. THE ENERGY WILL AID IN PRODUCING SNOW OVER THE  
GREAT LAKES INTO THE LOWER GREAT LAKES AND NORTHERN NEW ENGLAND,  
ENDING OVER THE GREAT LAKES BY FRIDAY EVENING AND OVER NORTHERN  
NEW ENGLAND BY SATURDAY MORNING.  
 
A THIRD AREA OF UPPER-LEVEL ENERGY OVER THE NORTHERN HIGH PLAINS  
WILL MOVE SOUTHEASTWARD TO THE MIDDLE MISSISSIPPI VALLEY BY  
SATURDAY MORNING AND WEAKEN OVER THE LOWER GREAT LAKES BY SATURDAY  
EVENING. THE SYSTEM WILL PRODUCE AN AREA OF SNOW AND RAIN OVER  
PARTS OF THE NORTHERN ROCKIES/NORTHERN HIGH PLAINS THAT WILL  
EXPAND INTO PARTS OF THE NORTHERN PLAINS/UPPER MISSISSIPPI VALLEY  
BY FRIDAY EVENING. THE SNOW WILL EXPAND INTO PARTS OF THE GREAT  
LAKES BY SATURDAY MORNING, ENDING BY SATURDAY EVENING. THE SNOW  
WILL END OVER THE NORTHERN PLAINS INTO THE UPPER MISSISSIPPI  
VALLEY BY SATURDAY AFTERNOON. OVERNIGHT SATURDAY, SNOW WILL MOVE  
INTO PARTS OF THE CENTRAL ROCKIES WITH A NARROW SWATH OF SNOW  
EXTENDING FROM THE CENTRAL PLAINS ACROSS THE MIDDLE  
MISSISSIPPI/OHIO VALLEYS INTO PARTS OF THE NORTHEAST.  
 
MEANWHILE, RAIN OVER PARTS OF THE PACIFIC NORTHWEST COAST WILL  
COME TO AN END BY FRIDAY EVENING AS UPPER-LEVEL RIDGING BUILDS  
OVER THE AREA. OVERNIGHT FRIDAY, MOISTURE FROM THE WESTERN GULF  
OF MEXICO WILL START OF MOISTEN THE AIR OVER THE WESTERN GULF  
COAST SO BY SATURDAY NIGHT INTO SUNDAY, SHOWERS AND THUNDERSTORMS  
WILL DEVELOP OVER PARTS OF THE WESTERN GULF COAST.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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