078  
FXUS01 KWBC 182006  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
306 PM EST SUN FEB 18 2018  
 
VALID 00Z MON FEB 19 2018 - 00Z WED FEB 21 2018  
 
...HEAVY SNOW POSSIBLE OVER THE NORTHERN PLAINS INTO THE CENTRAL  
ROCKIES AND THE UPPER GREAT LAKES...  
 
...HEAVY RAIN POSSIBLE FROM PARTS OF THE SOUTHERN PLAINS  
NORTHEASTWARD TO THE GREAT LAKES...  
 
...RAIN/FREEZING RAIN POSSIBLE OVER PARTS OF THE MIDDLE/UPPER  
MISSISSIPPI VALLEY INTO PARTS OF THE UPPER GREAT LAKES...  
 
...TEMPERATURES WILL BE 15 TO 40 DEGREES BELOW AVERAGE OVER PARTS  
OF THE NORTHERN/CENTRAL PLAINS INTO PARTS OF THE NORTHERN  
ROCKIES...  
 
A FRONT EXTENDING FROM THE UPPER GREAT LAKES TO THE SOUTHERN HIGH  
PLAINS WILL BECOME QUASI-STATIONARY THROUGH TUESDAY. THE SYSTEM  
WILL PRODUCE SNOW OVER PARTS OF THE UPPER GREAT LAKES/UPPER  
MISSISSIPPI VALLEY INTO PARTS OF THE NORTHERN PLAINS THROUGH  
TUESDAY. THE SNOW WILL EXPAND INTO PARTS OF THE CENTRAL PLAINS ON  
MONDAY INTO TUESDAY. MOISTURE FROM THE WESTERN GULF OF MEXICO  
WILL STREAM NORTHWARD INTO PARTS OF THE CENTRAL/SOUTHERN PLAINS  
INTO PARTS OF THE LOWER/MIDDLE MISSISSIPPI VALLEY THAT WILL  
CONTINUE TO FLOW NORTHWARD INTO THE WESTERN OHIO VALLEY/GREAT  
LAKES ON MONDAY INTO TUESDAY. THE MOISTURE WILL AID IN PRODUCING  
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE SOUTHERN PLAINS INTO  
PARTS OF THE LOWER MISSISSIPPI VALLEY THAT WILL EXPAND INTO PARTS  
OF THE MIDDLE MISSISSIPPI VALLEY/WESTERN OHIO VALLEY BY MONDAY  
MORNING CONTINUING THROUGH TUESDAY. THE MOISTURE WILL ALSO  
PRODUCE RAIN OVER PARTS OF THE SOUTHEAST THAT WILL LIFT NORTHWARD  
INTO THE OHIO VALLEY/MID-ATLANTIC BY MONDAY MORNING. THE RAIN  
WILL CONTINUE TO MOVE NORTHWARD INTO PARTS OF THE NORTHEAST BY  
MONDAY EVENING INTO TUESDAY. ADDITIONALLY ALONG THE RAIN/SNOW  
LINE, RAIN AND FREEZING RAIN WILL DEVELOP OVER PARTS OF THE  
CENTRAL PLAINS INTO PARTS OF THE UPPER GREAT LAKES MONDAY MORNING  
INTO TUESDAY.  
 
MEANWHILE ALONG THE WESTERN PARTS OF THE STORM, THE WESTERN END OF  
THE FRONT WILL EXTEND FROM THE CENTRAL ROCKIES INTO THE GREAT  
BASIN AND SOUTHERN CALIFORNIA. THE BOUNDARY MOVES EASTWARD TO THE  
SOUTHERN HIGH PLAINS BY TUESDAY. THE SYSTEM PRODUCES SNOW FROM  
PARTS OF THE PACIFIC NORTHWEST/NORTHERN CALIFORNIA EASTWARD TO THE  
NORTHERN/CENTRAL HIGH PLAINS AND COASTAL RAIN OVER PARTS OF THE  
NORTHERN/CENTRAL CALIFORNIA COAST THAT WILL MOVE SOUTHEASTWARD  
INTO THE GREAT BASIN/CENTRAL ROCKIES OVERNIGHT SUNDAY INTO MONDAY.  
THE SNOW WILL CONTINUE TO MOVE SOUTHEASTWARD INTO PARTS OF THE  
SOUTHWEST/SOUTHERN ROCKIES AND THE HIGHER ELEVATIONS OF  
CENTRAL/SOUTHERN CALIFORNIA BY MONDAY EVENING. THE SNOW WILL WANE  
OVER PARTS OF THE PACIFIC NORTHWEST/NORTHERN ROCKIES AND PARTS OF  
CALIFORNIA/GREAT BASIN/SOUTHWEST BY TUESDAY. IN ADDITION,  
OVERNIGHT SUNDAY RAIN WILL DEVELOP OVER PARTS OF THE SOUTHWEST AND  
SOUTHERN CALIFORNIA COAST WITH RAIN ENDING OVER PARTS OF SOUTHERN  
CALIFORNIA COAST BY MONDAY EVENING. THE RAIN OVER THE SOUTHWEST  
WILL CHANGE OVER TO SNOW OVERNIGHT MONDAY INTO TUESDAY.  
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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