575  
FXUS01 KWBC 132000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
259 PM EST TUE FEB 13 2018  
 
VALID 00Z WED FEB 14 2018 - 00Z FRI FEB 16 2018  
   
..HEAVY SNOW POSSIBLE OVER PARTS OF THE CASCADES
 
 
...HEAVY SNOW POSSIBLE OVER PARTS OF THE NORTHERN/CENTRAL  
ROCKIES...  
   
..HEAVY RAIN POSSIBLE OVER PARTS OF THE SOUTHWEST
 
 
MOISTURE FLOWING NORTHWARD OUT OF THE WESTERN GULF OF MEXICO  
EXTEND NORTHWARD INTO PARTS OF THE LOWER MISSISSIPPI VALLEY INTO  
THE OHIO VALLEY THROUGH THURSDAY. THE MOISTURE WILL AID IN  
PRODUCING SHOWERS AND THUNDERSTORMS OVER PARTS OF THE LOWER  
MISSISSIPPI VALLEY THAT WILL EXPAND INTO THE OHIO/TENNESSEE  
VALLEYS BY WEDNESDAY MORNING CONTINUING OVER THE REGION THROUGH  
THURSDAY. RAIN WILL BEGIN TO DEVELOP OVER PARTS OF THE  
CENTRAL/SOUTHERN APPALACHIANS ON WEDNESDAY THAT WILL EXPAND INTO  
THE MID-ATLANTIC AND CONTINUING OVER THE AREA THROUGH THURSDAY,  
TOO.  
 
MEANWHILE, UPPER-LEVEL ENERGY OVER THE SOUTHEASTERN ALASKAN  
COAST/BRITISH COLUMBIA COAST MOVES SOUTHEASTWARD TO  
CALIFORNIA/GREAT BASIN BY THURSDAY. THE ENERGY WILL AID IN  
DEVELOPING RAIN AND HIGHER ELEVATION SNOW OVER PARTS OF THE  
PACIFIC NORTHWEST OVERNIGHT TUESDAY THAT WILL BEGIN TO TAPER OFF  
OVERNIGHT WEDNESDAY. ON WEDNESDAY, SNOW WILL DEVELOP OVER PARTS  
OF THE NORTHERN ROCKIES/NORTHERN HIGH PLAINS THAT WILL EXPAND INTO  
PARTS OF THE NORTHERN PLAINS BY WEDNESDAY EVENING AND INTO PARTS  
OF THE UPPER MISSISSIPPI VALLEY OVERNIGHT WEDNESDAY INTO THURSDAY.  
ALSO OVERNIGHT WEDNESDAY, SNOW WILL MOVE INTO PARTS OF THE GREAT  
BASIN AND THE CENTRAL ROCKIES. FURTHERMORE, UPPER-LEVEL ENERGY  
OFF THE CENTRAL/SOUTHERN CALIFORNIA COAST WILL MOVE INLAND ON  
WEDNESDAY AFTERNOON MOVING TO THE SOUTHWEST/CENTRAL ROCKIES BY  
THURSDAY. THE ENERGY WILL AID IN DRAWING A PLUME OF MOISTURE OFF  
THE PACIFIC ACROSS PARTS OF NORTHWEST MEXICO INTO PARTS OF THE  
SOUTHWEST WEDNESDAY AFTERNOON INTO EVENING CONTINUING INTO  
THURSDAY. THE ENERGY WILL ALSO AID IN DEVELOPING RAIN OVER PARTS  
OF THE SOUTHWEST OVERNIGHT WEDNESDAY INTO THURSDAY AS SNOW  
DEVELOPS OVER PARTS OF THE SOUTHERN ROCKIES ON THURSDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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