527  
FXUS01 KWBC 181955  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
354 PM EDT MON MAR 18 2019  
 
VALID 00Z TUE MAR 19 2019 - 00Z THU MAR 21 2019  
 
...HEAVY RAINFALL EXPECTED TO PERSIST THROUGH TUESDAY NIGHT IN  
SOUTHERN FLORIDA...  
 
...MAJOR TO HISTORIC RIVER FLOODING WILL CONTINUE ACROSS PARTS OF  
THE MISSISSIPPI AND MISSOURI RIVER BASINS...  
 
...AREAL FLOODING IS POSSIBLE IN PARTS OF THE NORTHWEST TO  
NORTHERN PLAINS...  
 
A FRONT LINGERING NEAR SOUTHERN FLORIDA AND PLENTY OF MOISTURE  
WILL LEAD TO RAIN ACROSS THE FLORIDA PENINSULA, POTENTIALLY HEAVY.  
A MARGINAL RISK OF EXCESSIVE RAINFALL IS IN PLACE ALONG THE  
SOUTHEASTERN FLORIDA COAST. RAIN IS FORECAST TO LIGHTEN BY  
WEDNESDAY MORNING, BUT COOLER THAN AVERAGE TEMPERATURES WILL  
PREVAIL THERE.  
 
SNOW AND RAIN SHOWERS ARE FORECAST FROM THE CENTRAL ROCKIES INTO  
THE CENTRAL PLAINS MONDAY NIGHT AND TUESDAY, AND RAIN SHOWERS WILL  
MOVE INTO THE MIDDLE/LOWER MISSISSIPPI VALLEY AND OHIO VALLEY ON  
WEDNESDAY DUE TO A LOW PRESSURE SYSTEM MOVING EASTWARD.  
PRECIPITATION TOTALS WILL REMAIN LIGHT WITH THIS SYSTEM. AN  
UPPER-LEVEL TROUGH WILL MOVE TOWARD THE WESTERN U.S. BY TUESDAY  
NIGHT AND WEDNESDAY, FIRST INCREASING PRECIPITATION CHANCES IN  
CALIFORNIA ON TUESDAY EVENING AND INTO THE CENTRAL GREAT BASIN AND  
SOUTHWEST BY WEDNESDAY. GENERALLY, RAIN WILL FALL IN LOWER  
ELEVATIONS, WITH SNOW IN HIGHER ELEVATIONS.  
 
MAJOR TO HISTORIC RIVER FLOODING IS FORECAST TO PERSIST FOR  
PORTIONS OF THE MISSOURI AND MISSISSIPPI RIVER BASINS AS SNOWMELT  
CONTINUES OVER AREAS THAT RECEIVED HEAVY RAINFALL LAST WEEK. FLOOD  
WARNINGS AND ADVISORIES ARE SCATTERED THROUGHOUT THE PLAINS,  
MISSISSIPPI VALLEY, AND WESTERN PARTS OF THE OHIO VALLEY REGION,  
WITH A FOCUS IN NEBRASKA AND WESTERN IOWA. FARTHER WEST AND NORTH,  
AREAL FLOODING IS ALSO POSSIBLE IN THE NORTHWEST AND NORTHERN  
PLAINS AS SNOWMELT CONTINUES OVER FROZEN GROUND. ABOVE AVERAGE  
TEMPERATURES IN THE NORTHERN GREAT BASIN AND THE NORTHERN PLAINS  
WILL AID IN SNOWMELT. ICE JAMS ARE ALSO A THREAT IN SOME AREAS.  
 
TATE  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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