378  
FXUS01 KWBC 231947  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
246 PM EST TUE JAN 23 2018  
 
VALID 00Z WED JAN 24 2018 - 00Z FRI JAN 26 2018  
 
...LINGERING FLOODING CONCERNS FOR PORTIONS OF NEW YORK INTO NEW  
ENGLAND THROUGH WEDNESDAY MORNING...  
 
...HEAVY RAIN AND SNOW FROM NORTHERN CALIFORNIA INTO THE  
NORTHWEST...  
 
A STORM SYSTEM WILL CONTINUE TO EXIT THE NORTHEAST THOUGH THE  
REMAINDER OF THIS EVENING INTO TONIGHT. AN ONGOING WINTRY MIX OF  
SNOW AND FREEZING RAIN WILL CHANGE OVER TO RAIN FOR THE REMAINDER  
OF NEW ENGLAND AS WARMER AIR CONTINUES TO SPREAD NORTH THIS  
EVENING. COLDER AIR WILL WRAP AROUND ON THE BACK SIDE OF THE  
DEPARTING SURFACE LOW WITH A RETURN TO LIGHT SNOW EXPECTED FOR  
PORTIONS OF FAR NORTHERN NEW ENGLAND EARLY WEDNESDAY MORNING.  
DESPITE THE WANING PRECIPITATION, FLOODING WILL REMAIN A CONCERN  
FROM NEW YORK INTO NEW ENGLAND GIVEN THE POTENTIAL FOR ICE JAM  
FLOODING COUPLED WITH RECENT RAINFALL.  
 
A SLOW MOVING PACIFIC COLD FRONT WILL WORK EASTWARD OVER THE NEXT  
TWO DAYS BRINGING A ROUND OF HEAVY RAIN TO PORTIONS OF THE  
NORTHERN CALIFORNIA AND SOUTHWESTERN OREGON COASTS TONIGHT AS THE  
BOUNDARY SLOWLY MOVES INLAND. AS COLDER AIR MOVES IN BEHIND THE  
COLD FRONT, SNOW LEVELS WILL FALL DURING THE DAY ON WEDNESDAY  
ALLOWING FOR INCREASING COVERAGE OF SNOW FROM THE KLAMATH AND  
CASCADES OF NORTHERN CALIFORNIA INTO THE WASHINGTON/OREGON  
CASCADES, EASTWARD INTO THE NORTHERN ROCKIES. ONE TO TWO FEET OF  
SNOW APPEARS LIKELY IN THE MOUNTAINS THROUGH THE DAY ON THURSDAY.  
THE INTENSITY OF PRECIPITATION WILL WANE WEDNESDAY NIGHT INTO  
THURSDAY AS ACCESS TO BETTER MOISTURE IS LOST, WITH A MORE SHOWERY  
REGIME DEVELOPING TOWARD THE END OF THE WEEK FOR THE WEST.  
 
ACROSS THE MIDDLE OF THE COUNTRY, CONDITIONS WILL BE DRY THROUGH  
THURSDAY, WITH THE EXCEPTION OF POSSIBLE LIGHT RAIN OVER SOUTH  
TEXAS. TEMPERATURES WILL ALSO SEE A WARMING TREND FROM THE CENTRAL  
TO NORTHERN PLAINS, SPREADING EASTWARD INTO THE MIDWEST WHERE HIGH  
TEMPERATURES WILL RANGE FROM 10 TO 20 DEGREES ABOVE AVERAGE FOR  
THURSDAY.  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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