413  
FXUS01 KWBC 042010  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
310 PM EST MON DEC 04 2017  
 
VALID 00Z TUE DEC 05 2017 - 00Z THU DEC 07 2017  
 
...HEAVY RAIN AND SNOW TO BE DELIVERED THROUGHOUT THE EASTERN U.S.  
AS AN IMPRESSIVE STORM SYSTEM SWEEPS ACROSS THESE REGIONS...  
 
A STRONG COLD FRONT MOVING OVER THE MISSISSIPPI VALLEY WILL  
CONTINUE ITS EASTWARD TREK TOWARD THE EAST COAST THROUGH MIDWEEK.  
ON MONDAY EVENING, SHOWERS AND THUNDERSTORMS WILL MOVE FROM THE  
UPPER MIDWEST TO THE SOUTHERN PLAINS. SOME OF THE CONVECTIVE  
ACTIVITY IN THE LOWER MISSISSIPPI VALLEY MAY GIVE WAY TO FLASH  
FLOODING--CREATING A MARGINAL RISK FOR FLASH FLOODING. AREAS NORTH  
AND WEST OF THE LOW, SPECIFICALLY IN THE NORTHERN/CENTRAL PLAINS  
AND PARTS OF THE UPPER MIDWEST, CAN EXPECT LIGHT TO MODERATE SNOW  
TONIGHT AND INTO TOMORROW. AS THE SURFACE LOW LIFTS NORTH INTO  
CANADA, A WESTWARD FLOW WILL PROMOTE LAKE EFFECT SNOW OVER THE  
GREAT LAKES ON TUESDAY AND WEDNESDAY. PLEASE SEE WPC'S WINTER  
WEATHER PRODUCTS FOR MORE INFORMATION.  
 
BY TUESDAY, THE COLD FRONT WILL STRETCH FROM THE NORTHEAST TO THE  
SOUTHERN PLAINS. THE LINE OF CONVECTION WILL PERSIST ALONG AND  
AHEAD OF THE BOUNDARY. HEAVY RAINFALL MAY DEVELOP IN PARTS OF THE  
SOUTHEAST ON TUESDAY AFTERNOON--THUS A MARGINAL RISK OF FLASH  
FLOODING IS POSSIBLE. IN ADDITION, PRECIPITATION IS EXPECTED TO  
SPREAD ACROSS THE SOUTHEAST, MID-ATLANTIC, AND NORTHEAST  
THROUGHOUT THE DAY. BY WEDNESDAY MORNING, MOST OF THE  
PRECIPITATION WILL MOVE OFF THE EAST COAST AS THE FRONT EXITS TO  
THE ATLANTIC. HOWEVER, THE COLD FRONT WILL PUSH SOUTHWARD OVER  
FLORIDA--BRINGING SHOWERS AND THUNDERSTORMS WITH IT. LINGERING  
SHOWERS IN CENTRAL AND SOUTHEAST TEXAS WILL CARRY ON INTO  
WEDNESDAY. HOWEVER, SOME PRECIPITATION ESPECIALLY IN WEST TEXAS  
COULD BE SNOW AS COLD TEMPERATURES SPILL INTO THE WESTERN PORTIONS  
OF THE STATE. ONCE AGAIN, SEE WPC'S WINTER WEATHER PRODUCTS.  
 
TEMPERATURES BEHIND THE COLD FRONT ARE EXPECTED TO BE 5 TO 10  
DEGREES COOLER THAN NORMAL--WHICH MOST AREAS WILL EXPERIENCE BY  
TUESDAY AND WEDNESDAY. TEMPERATURES ALONG THE WEST COAST WILL BE  
5 TO 10 DEGREES ABOVE NORMAL. UNFORTUNATELY, A WARM AND DRY  
PATTERN WILL CONTINUE TO BE IN PLACE ACROSS SOUTHERN CALIFORNIA.  
CONSEQUENTLY, CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED  
THROUGH THE SHORT TERM PERIOD.  
 
REINHART  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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