176  
FXUS01 KWBC 150759  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
358 AM EDT MON OCT 15 2018  
 
VALID 12Z MON OCT 15 2018 - 12Z WED OCT 17 2018  
   
..HEAVY RAIN POSSIBLE OVER PARTS OF THE SOUTHERN PLAINS
 
 
...RAIN/FREEZING RAIN POSSIBLE OVER SOUTHWESTERN TEXAS INTO NEW  
MEXICO...  
 
...TEMPERATURES WILL BE 20 TO 35 DEGREES BELOW AVERAGE OVER PARTS  
OF THE SOUTHERN/CENTRAL PLAINS INTO PARTS OF THE SOUTHERN  
ROCKIES...  
   
..SANTA ANA WIND POSSIBLE OVER PARTS OF SOUTHERN CALIFORNIA
 
 
 
A FRONT EXTENDING FROM THE LOWER GREAT LAKES SOUTHWESTWARD TO THE  
WESTERN GULF COAST WILL MOVE EASTWARD OFF THE NORTHEAST/NORTHERN  
MID-ATLANTIC COAST BY TUESDAY MORNING. THE SOUTHERN HALF OF THE  
BOUNDARY WILL LINGER OVER THE SOUTHEAST TO THE CENTRAL GULF COAST  
BY WEDNESDAY. SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND  
AHEAD OF THE FRONT FROM PARTS OF THE OHIO VALLEY/CENTRAL  
APPALACHIANS SOUTHWESTWARD TO THE LOWER MISSISSIPPI VALLEY INTO  
PARTS OF THE SOUTHERN PLAINS/WESTERN GULF COAST THAT WILL MOVE  
EASTWARD TO THE MID-ATLANTIC SOUTHWESTWARD TO THE WESTERN GULF  
COAST BY MONDAY EVENING. THE SHOWERS AND THUNDERSTORMS WILL MOVE  
OFF THE MID-ATLANTIC COAST BY TUESDAY MORNING WHILE CONTINUING  
OVER THE SOUTHEAST TO THE CENTRAL GULF COAST THROUGH TUESDAY  
EVENING. RAIN WILL ALSO DEVELOP OVER PARTS OF THE LOWER/MIDDLE  
MISSISSIPPI VALLEY INTO PARTS OF THE GREAT LAKES/OHIO VALLEY INTO  
THE MID-ATLANTIC THAT WILL MOVE EASTWARD INTO THE  
NORTHEAST/NORTHERN MID-ATLANTIC INTO PARTS OF THE OHIO VALLEY BY  
MONDAY EVENING. THE RAIN WILL MOVE OFF THE NORTHEAST/NORTHERN  
MID-ATLANTIC COAST BY TUESDAY AFTERNOON. ALONG THE NORTHWESTERN  
EDGE OF THE PRECIPITATION SHIELD, SNOW AND RAIN WILL DEVELOP OVER  
PARTS OF THE UPPER GREAT LAKES/UPPER MISSISSIPPI VALLEY ON MONDAY  
THAT WILL MOVE INTO CANADA BY MONDAY EVENING. WET SNOW WILL ALSO  
DEVELOP OVER PARTS OF NORTHERN NEW ENGLAND EARLY TUESDAY MORNING  
ENDING BY TUESDAY AFTERNOON.  
 
MEANWHILE, UPPER-LEVEL ENERGY OVER SOUTHERN CALIFORNIA INTO PARTS  
OF THE GREAT BASIN/CENTRAL ROCKIES WILL FORM AN UPPER-LEVEL LOW  
OVER THE SOUTHWEST OVERNIGHT MONDAY BECOMING QUASI-STATIONARY OVER  
THE REGION THROUGH WEDNESDAY. COLD HIGH PRESSURE OVER THE CENTRAL  
ROCKIES WILL SINK SOUTHEASTWARD TO THE SOUTHERN HIGH PLAINS BY  
TUESDAY EVENING INTO WEDNESDAY. THE ENERGY WILL AID IN PRODUCING  
RAIN AND SNOW OVER PARTS OF THE SOUTHERN ROCKIES THAT WILL CHANGE  
OVER TO ALL RAIN OVER THE SOUTHWEST OVERNIGHT MONDAY. THE  
CLOCKWISE CIRCULATION AROUND THE HIGH PRESSURE WILL AID IN  
PRODUCING RAIN OVER PARTS OF THE SOUTHERN PLAINS ON MONDAY  
AFTERNOON INTO TUESDAY MORNING. OVERNIGHT MONDAY RAIN WITH  
POCKETS OF RAIN/FREEZING RAIN WILL DEVELOP OVER SOUTHWESTERN TEXAS  
BECOMING MOSTLY RAIN OVER THE AREA BY TUESDAY EVENING. ON  
TUESDAY, RAIN AND AREAS OF RAIN/FREEZING RAIN WILL DEVELOP OVER  
PARTS OF NEW MEXICO INTO WEDNESDAY.  
 
A SECOND FRONT OVER SOUTH-CENTRAL CANADA WILL MOVE SOUTHEASTWARD  
TO THE GREAT LAKES/MIDDLE MISSISSIPPI VALLEY INTO THE NORTHERN  
PLAINS BY TUESDAY EVENING INTO WEDNESDAY. LIGHT SNOW AND RAIN  
WILL DEVELOP OVER PARTS OF THE NORTHERN PLAINS/UPPER MISSISSIPPI  
VALLEY ON MONDAY EVENING. THE RAIN AND SNOW WILL MOVE INTO THE  
UPPER GREAT LAKES OVERNIGHT MONDAY INTO TUESDAY EVENING.  
ELSEWHERE, HIGH PRESSURE OVER THE NORTHERN/CENTRAL ROCKIES WILL  
AID IN PRODUCING HIGH WIND OVER PARTS OF SOUTHERN CALIFORNIA  
MONDAY INTO MONDAY EVENING.  
 
 
ZIEGENFELDER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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