792  
FXUS01 KWBC 011958  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
257 PM EST MON JAN 1 2018  
 
VALID 00Z TUE JAN 2 2018 - 00Z THU JAN 4 2018  
 
...AMPLIFIED WEATHER PATTERN CONTINUES WITH WESTERN RIDGE AND  
EASTERN TROUGH...  
 
THE ANOMALOUSLY COLD WEATHER ACROSS THE CENTRAL AND EASTERN U.S.  
WILL REMAIN QUITE PERSISTENT GOING THROUGH THE MIDDLE OF THE WORK  
WEEK. A RATHER PRONOUNCED DIP IN THE JET STREAM AND HIGHLY  
AMPLIFIED UPPER LEVEL TROUGH IS ALLOWING FOR MULTIPLE COLD FRONTS  
TO CROSS THE PLAINS, AND THEN REACHING THE EAST COAST. THIS IS  
ALLOWING FRIGID AIR MASSES TO FLOW SOUTHWARD INTO THE U.S.  
UNABATED, WITH MANY AREAS UNDER WIND CHILL ADVISORIES AND WIND  
CHILL WARNINGS FROM THE NORTHERN PLAINS TO THE OHIO VALLEY. THE  
BITTERLY COLD WEATHER WILL ALSO BE UNRELENTING ACROSS THE  
MID-ATLANTIC AND NORTHEAST U.S., WHERE WIND CHILLS ARE ALSO  
EXPECTED TO BE IN THE SUB-ZERO REALM AT TIMES, ESPECIALLY DURING  
THE OVERNIGHT PERIODS.  
 
THE DEEP SOUTH AND GULF COAST REGION WILL NOT BE SPARED FROM THE  
REALITIES OF WINTER. HARD FREEZE WARNINGS HAVE BEEN POSTED FROM  
SOUTHERN TEXAS TO THE SOUTHEAST U.S. COAST FOR WIDESPREAD LOWS IN  
THE TEENS AND LOW 20S, AND HIGHS IN THE 20S AND 30S. THESE VALUES  
ARE ON THE ORDER OF 20 DEGREES BELOW NORMAL, AND A FEW RECORD LOWS  
ARE POSSIBLE BEFORE THIS WEATHER PATTERN MODIFIES. THE PART OF  
THE NATION THAT WILL BE SPARED THE WRATH OF OLD MAN WINTER WILL BE  
THE SOUTHWESTERN U.S., WHERE ABOVE NORMAL TEMPERATURES AND DRY  
WEATHER WILL CONTINUE.  
 
IN THE PRECIPITATION DEPARTMENT, A DRY PATTERN IS EXPECTED ACROSS  
THE MAJORITY OF THE CONTINENTAL U.S. WITH A FEW EXCEPTIONS. SOME  
LAKE EFFECT SNOW IS EXPECTED ACROSS THE FAVORED REGIONS OF  
MICHIGAN, AND DOWNWIND OF LAKES ERIE AND ONTARIO. SOME SHOWERS  
ARE POSSIBLE FOR PARTS OF CENTRAL AND NORTHERN CALIFORNIA WITH A  
WEAK DISTURBANCE OFFSHORE. BY WEDNESDAY, A DEVELOPING STORM NEAR  
THE NORTHERN BAHAMAS WILL LIKELY PROVIDE ENOUGH MOISTURE FOR  
COASTAL RAIN FROM THE OUTER BANKS OF NORTH CAROLINA TO FLORIDA,  
WITH SOME WINTRY PRECIPITATION POSSIBLE FARTHER INLAND. THIS  
SYSTEM WILL BE MONITORED CLOSELY FOR FUTURE IMPACTS BEYOND  
WEDNESDAY FOR THE EAST COAST.  
 
D. HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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