901  
FXUS01 KWBC 270756  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
256 AM EST SAT JAN 27 2018  
 
VALID 12Z SAT JAN 27 2018 - 12Z MON JAN 29 2018  
 
...HEAVY RAIN POSSIBLE OVER THE CENTRAL GULF COAST AND COASTAL  
CAROLINAS/NORTHEASTERN FLORIDA...  
   
..HEAVY RAINS POSSIBLE OVER THE OLYMPIC PENINSULA
 
 
   
..HEAVY SNOW OVER THE NORTHERN CASCADES
 
 
   
..SNOW OVER THE NORTHERN ROCKIES
 
 
 
A FRONT EXTENDING FROM THE GREAT LAKES SOUTHWESTWARD TO THE  
SOUTHERN PLAINS WILL MOVE EASTWARD TO OFF THE NORTHEAST/NORTHERN  
MID-ATLANTIC COAST BY SUNDAY EVENING WHILE REMAINING OVER PARTS OF  
THE SOUTHERN MID-ATLANTIC INTO THE SOUTHEAST/EASTERN GULF COAST  
ALSO BY SUNDAY EVENING. MOISTURE FROM THE WESTERN GULF OF MEXICO  
WILL POOL ALONG THE BOUNDARY AIDING IN THE DEVELOPMENT OF RAIN  
FROM WESTERN/CENTRAL GULF COAST TO THE WESTERN OHIO VALLEY/MIDDLE  
MISSISSIPPI VALLEY THAT WILL MOVE EASTWARD AND EXPAND NORTHWARD  
INTO THE LOWER GREAT LAKES TO THE CENTRAL/WESTERN GULF COAST BY  
SATURDAY EVENING. THE RAIN WILL BE HEAVY AT TIMES OVER THE  
CENTRAL GULF COAST ON SATURDAY. AS THE FRONT CONTINUES TO MOVE  
EASTWARD, THE RAIN WILL MOVE OFF MOST OF THE NORTHEAST COAST BY  
SUNDAY EVENING. LIKEWISE, THE RAIN ALONG THE SOUTHERN HALF OF THE  
BOUNDARY WILL MOVE EASTWARD INTO THE SOUTHERN MID-ATLANTIC AND THE  
SOUTHEAST BY SUNDAY EVENING, TOO. OVERNIGHT SATURDAY INTO SUNDAY  
MORNING, THE RAIN WILL END OVER THE CENTRAL/WESTERN GULF COAST.  
 
MEANWHILE, A PLUME OF MOISTURE WILL STREAM INTO THE PACIFIC  
NORTHWEST/NORTHERN CALIFORNIA THROUGH TO SUNDAY EVENING WHILE THE  
AXIS OF MOISTURE MOVES NORTHWARD INTO SOUTHWESTERN CANADIAN COAST.  
THE MOISTURE WILL AID IN PRODUCING RAIN AND HIGHER ELEVATION SNOW  
OVER THE PACIFIC NORTHWEST/NORTHERN CALIFORNIA WITH SNOW EXTENDING  
EASTWARD OVER PARTS OF THE NORTHERN ROCKIES THROUGH SUNDAY  
MORNING. AS THE MOISTURE AXIS MOVES NORTHWARD, THE RAIN AND  
HIGHER ELEVATION SNOW WILL END OVER NORTHERN CALIFORNIA OVERNIGHT  
SATURDAY WITH THE RAIN AND HIGHER ELEVATION SNOW CONTINUES OVER  
PARTS OF THE PACIFIC NORTHWEST AND SNOW OVER PARTS OF THE NORTHERN  
ROCKIES/NORTHERN HIGH PLAINS. ADDITIONALLY, UPPER-LEVEL RIDGING  
WILL DEVELOP OVER THE NORTHWEST AND THE SNOW LEVELS WILL RISE ON  
SATURDAY INTO SUNDAY.  
 
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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