891  
FXUS01 KWBC 300733  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
232 AM EST TUE JAN 30 2018  
 
VALID 12Z TUE JAN 30 2018 - 12Z THU FEB 01 2018  
   
..RAIN POSSIBLE FOR THE PACIFIC NORTHWEST
 
 
...HEAVY SNOW POSSIBLE OVER THE NORTHERN CASCADES AND THE UPPER  
GREAT LAKES...  
 
...SNOW POSSIBLE FOR THE NORTHERN ROCKIES AND PARTS OF THE LOWER  
GREAT LAKES INTO THE NORTHEAST...  
 
A DEEP UPPER-LEVEL TROUGH OVER THE MID-ATLANTIC/LOWER GREAT LAKES  
WILL MOVE OFF THE NORTHEAST COAST OVERNIGHT TUESDAY. THE SYSTEM  
WILL PRODUCE LIGHT SNOW OVER PARTS OF THE LOWER GREAT  
LAKES/CENTRAL APPALACHIANS INTO PARTS OF THE MID-ATLANTIC AND NEW  
ENGLAND THAT WILL END BY TUESDAY EVENING.  
 
MEANWHILE, A FRONT OVER THE NORTHERN HIGH PLAINS/NORTHERN ROCKIES  
INTO PARTS OF THE NORTHWEST WILL MOVE EASTWARD TO THE UPPER GREAT  
LAKES/MIDDLE MISSISSIPPI VALLEY/SOUTHERN HIGH PLAINS BY WEDNESDAY  
EVENING. THE STORM WILL PRODUCE SNOW AND LOWER ELEVATION RAIN  
OVER PARTS OF THE NORTHERN INTERMOUNTAIN REGION/NORTHERN ROCKIES  
THAT WILL CONTINUE OVER THE REGION THROUGH WEDNESDAY EVENING. THE  
SNOW WILL EXPAND INTO PARTS OF THE NORTHERN HIGH PLAINS ON  
WEDNESDAY INTO WEDNESDAY EVENING. AS THE BOUNDARY MOVES EASTWARD,  
SNOW WILL DEVELOP OVER PARTS OF THE UPPER MISSISSIPPI VALLEY BY  
TUESDAY AFTERNOON EXPANDING INTO THE UPPER GREAT LAKES OVERNIGHT  
TUESDAY WITH THE SNOW ENDING OVER THE UPPER MISSISSIPPI VALLEY BY  
WEDNESDAY MORNING. ALSO ON WEDNESDAY THE SNOW WILL MOVE EASTWARD  
INTO THE LOWER GREAT LAKES INTO PARTS OF THE NORTHEAST BY  
WEDNESDAY EVENING.  
 
ELSEWHERE, ONSHORE FLOW OVER THE PACIFIC NORTHWEST WILL PRODUCE  
COASTAL RAIN AND HIGHER ELEVATIONS SNOW OVER PARTS OF THE  
NORTHWEST THROUGH WEDNESDAY EVENING INTO THURSDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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