585  
FXUS01 KWBC 272001  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
300 PM EST THU DEC 27 2018  
 
VALID 00Z FRI DEC 28 2018 - 00Z SUN DEC 30 2018  
 
...SIGNIFICANT WINTER STORM ACROSS THE UPPER MISSISSIPPI  
VALLEY/GREAT LAKES WILL CONTINUE THROUGH THIS EVENING...  
 
...HEAVY RAINFALL, FLASH FLOODING, AND STRONG TO SEVERE  
THUNDERSTORMS POSSIBLE ACROSS PARTS OF THE SOUTH...  
 
...SIGNIFICANT WINTER STORM TO BRING HEAVY SNOW AND NEAR BLIZZARD  
CONDITIONS TO MUCH OF NEW MEXICO...  
 
THE WINTER STORM WHICH HAS BROUGHT SIGNFICANT ACCUMULATING  
SNOWFALL AND BLIZZARD CONDITIONS TO PARTS OF THE CENTRAL/NORTHERN  
PLAINS INTO THE UPPER MISSISSIPPI VALLEY TODAY, WILL CONTINUE  
PUSHING NORTHEASTWARD THROUGH TONIGHT. ADDITIONAL SNOW  
ACCUMULATIONS ARE POSSIBLE FROM THE EASTERN SOUTH DAKOTA TO THE  
WESTERN GREAT LAKES THIS EVENING AND INTO EARLY FRIDAY, WITH HIGH  
WINDS EXPECTED TO RESULT IN BLIZZARD CONDITIONS. WIDESPREAD WINTER  
STORM WARNINGS AND BLIZZARD WARNINGS ARE IN EFFECT FROM THE  
CENTRAL PLAINS INTO NORTHERN MINNESOTA AND THE UPPER PENINSULA OF  
MICHIGAN THROUGH EARLY FRIDAY. FARTHER SOUTH, WIDESPREAD RAINFALL,  
LOCALLY HEAVY AT TIMES, WILL SPREAD NORTH AND EASTWARD FROM THE  
LOWER MISSISSIPPI VALLEY/SOUTHEAST INTO THE MID-ATLANTIC. FLOODING  
AND FLASH FLOODING WILL BE A THREAT AND WPC HAS HIGHLIGHTED A  
SLIGHT TO MODERATE RISK FOR FLASH FLOODING FROM THE GULF COAST TO  
THE SOUTHERN APPALACHIANS THROUGH TONIGHT, EXTENDING NORTHWARD  
INTO THE CENTRAL APPALACHIANS ON FRIDAY. ACROSS MAINLY SOUTHERN  
LOCATIONS, STRONG TO SEVERE THUNDERSTORMS ARE ALSO POSSIBLE AND  
SPC HAS A SLIGHT RISK IN PLACE FROM EASTERN LOUISIANA TO SOUTHERN  
MISSISSIPPI THROUGH THIS EVENING. SOME LIGHT SNOW ACCUMULATIONS  
ARE POSSIBLE FRIDAY ACROSS NORTHERN NEW ENGLAND AS WELL WHERE  
WINTER WEATHER ADVISORIES ARE IN EFFECT.  
 
A SECOND WINTER STORM WILL ALSO AFFECT PARTS OF THE SOUTHWEST  
BEGINNING TONIGHT AND PERSISTING INTO SATURDAY NIGHT. SNOWFALL  
WILL OVERSPREAD THE REGION FROM SOUTHERN COLORADO SOUTHWARD  
THROUGH EASTERN ARIZONA, NEW MEXICO, AND THE PANHANDLE OF TEXAS  
WITH THE HEAVIEST SNOWFALL LIKELY ACROSS CENTRAL AND EASTERN NEW  
MEXICO WHERE AS MUCH AS 1 TO 2 FEET IS POSSIBLE IN THE HIGHEST  
TERRAIN. STRONG WINDS WILL ALSO ACCOMPANY THE SNOWFALL, WITH  
BLIZZARD CONDITIONS POSSIBLE.  
 
AFTER A SHORT LULL TODAY AND INTO TOMORROW, ANOTHER ROUND OF RAIN  
AND HIGHER ELEVATION SNOWS ARE EXPECTED TO MOVE INTO THE PACIFIC  
NORTHWEST BEGINNING LATE FRIDAY AND INTO SATURDAY. WITH REGARD TO  
TEMPERATURES ACROSS THE CONTIGUOUS U.S., WELL ABOVE NORMAL TEMPS  
ARE EXPECTED AHEAD OF THE BIG SYSTEM ACROSS THE EASTERN U.S. WHILE  
BELOW TO WELL BELOW ARE POSSIBLE BEHIND IT ACROSS THE PLAINS AND  
MOUNTAINOUS WEST.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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