712  
FXUS01 KWBC 052001  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
300 PM EST MON FEB 05 2018  
 
VALID 00Z TUE FEB 06 2018 - 00Z THU FEB 08 2018  
 
...A NEW THREAT OF HEAVY RAIN WILL BE DEVELOPING FOR THE LOWER  
MISSISSIPPI AND TENNESSEE VALLEYS TOWARD THE MIDDLE OF THE WEEK...  
 
...MORE SNOW AND SOME ICE WILL BE SETTING UP ACROSS THE OHIO  
VALLEY AND THE NORTHEAST AS A NEW STORM IMPACTS THE EASTERN U.S IN  
THE COMING DAYS...  
 
...MILD TEMPERATURES CONTINUE OVER MOST OF THE WESTERN U.S. WHILE  
FRIGID WEATHER REMAINS EAST OF THE ROCKIES...  
 
COASTAL RAIN AND MOUNTAIN SNOW WILL BEGIN TO DECREASE IN INTENSITY  
AND COVERAGE ACROSS THE PACIFIC NORTHWEST AND EAST TO THE NORTHERN  
AND CENTRAL ROCKIES AS ONSHORE FLOW STEADILY REDUCES. HIGH  
PRESSURE OVER THE INTERIOR WEST/GREAT BASIN WILL KEEP MILD AND DRY  
CONDITIONS OVER THE MUCH OF THE REGION. MAXIMUM TEMPERATURES ARE  
FORECAST TO AVERAGE 10 TO 20 DEGREES ABOVE NORMAL.  
 
COLDER AND DRIER AIR HAS SETTLED INTO THE OHIO VALLEY, NORTHEAST  
AND MID-ATLANTIC IN THE WAKE OF A COLD FRONTAL PASSAGE. ANOTHER  
COLD FRONT IS FORECAST TO SWING THROUGH THE GREAT LAKES AND OHIO  
VALLEY THIS EVENING AND THOUGH THE APPALACHIANS, NORTHERN  
MID-ATLANTIC AND NORTHEAST ON TUESDAY. THIS SYSTEM WILL USHER IN  
ANOTHER BLAST OF COLD AIR AND SPREAD SNOW, HEAVY AT TIMES, FROM  
THE GREAT LAKES, OHIO VALLEY, APPALACHIAN SPINE AND THE NORTHEAST  
THROUGH MIDWEEK.  
 
AT THE SAME TIME A SEPARATE SYSTEM WILL QUICKLY ORGANIZE ACROSS  
THE LOWER MISSISSIPPI VALLEY BY LATE TUESDAY, WHICH WILL BRING  
WIDESPREAD RAIN TEXAS TO THE MID-ATLANTIC AND SOUTHEAST. LOCALLY  
AS MUCH AS A FEW INCHES OF RAIN WILL BE POSSIBLE ACROSS THESE  
LOCATIONS AND AS A RESULT THERE MAY BE SOME RUNOFF CONCERNS AND  
POSSIBLE FLOODING. THIS STORM SYSTEM WILL BE LIFTING NORTHEAST  
ACROSS THE TENNESSEE VALLEY AND MID-ATLANTIC REGION THROUGH  
WEDNESDAY, AND ULTIMATELY THIS WILL BRING WIDESPREAD PRECIPITATION  
TO AREAS OF THE OHIO VALLEY, MID-ATLANTIC AND NORTHEAST THROUGH  
LATE WEDNESDAY.  
 
A STARK THERMAL BOUNDARY WILL SET UP AS WARM GULF AIR LIFTS  
NORTHWARD INTO THE SOUTHERN STATES AND MEETS THE ARCTIC AIRMASS  
OVER THE CENTRAL U.S. A NARROW SWATH OF MIXED PRECIPITATION WILL  
BE POSSIBLE FROM OKLAHOMA TO MARYLAND AS THE SYSTEM ADVANCES  
EASTWARD TUESDAY AND WEDNESDAY. HEAVY SNOWFALL CAN BE EXPECTED  
NORTH AND WEST OF THE LOW TRACK AND AREAS OF THE NORTHERN  
MID-ATLANTIC REGION AND INTERIOR NORTHEAST WILL SEE THE HEAVIEST  
SNOWFALL WITH SOME AREAS SEEING AS MUCH AS 6 TO 12 INCHES. FARTHER  
SOUTH, THERE WILL BE PLENTY OF SHOWER AND SOME THUNDERSTORM  
ACTIVITY FOR THE SOUTHEAST AND SPREAD OUT ACROSS THE GULF COAST  
STATES.  
 
CAMPBELL/ORRISON  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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