294  
FXUS01 KWBC 300757  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
356 AM EDT SAT MAR 30 2019  
 
VALID 12Z SAT MAR 30 2019 - 12Z MON APR 01 2019  
 
...POTENTIALLY HEAVY RAIN AND THUNDERSTORMS ARE LIKELY ACROSS THE  
OHIO AND TENNESSEE VALLEYS ON SATURDAY...  
 
...A COLD FRONT WILL USHER IN COOLER TEMPERATURES FOR THE EASTERN  
U.S. ON SUNDAY AFTER A WARM SATURDAY, WHILE THE WEST WARMS...  
 
A STRONG COLD FRONT IS EXPECTED TO MOVE THROUGH THE MISSISSIPPI  
AND OHIO VALLEYS ON SATURDAY AND THROUGH THE EASTERN SEABOARD ON  
SUNDAY, CAUSING ACTIVE WEATHER ALONG IT. WIDESPREAD RAIN AND  
THUNDERSTORMS ARE FORECAST FOR THE LOWER MISSISSIPPI VALLEY  
NORTHEASTWARD THROUGH THE OHIO VALLEY ON SATURDAY. A SLIGHT RISK  
OF EXCESSIVE RAINFALL IS IN PLACE FOR PORTIONS OF THE OHIO VALLEY  
THAT ARE EXPECTING THE HEAVIEST RAIN TOTALS, WHILE THE STORM  
PREDICTION CENTER HAS OUTLOOKED A SLIGHT RISK OF SEVERE WEATHER IN  
THE TENNESSEE VALLEY ON SATURDAY. RAIN WILL SPREAD TO THE EASTERN  
SEABOARD BY SUNDAY MORNING AS THE FRONT PROGRESSES. SNOW IS ALSO  
EXPECTED ALONG THE NORTHWESTERN SIDE OF A LOW MOVING ALONG THE  
FRONT THROUGH THE LOWER GREAT LAKES REGION AND INTO SOUTHEASTERN  
CANADA. A SWATH OF 4 TO 6 INCHES OF SNOW IS FORECAST FOR THE LOWER  
GREAT LAKES REGION INTO PARTS OF NORTHERN NEW ENGLAND THROUGH  
SUNDAY NIGHT, AND LIGHT FREEZING RAIN IS POSSIBLE THERE AS WELL.  
AFTER THE FRONT PASSES, PRECIPITATION SHOULD DRY OUT IN MOST  
AREAS, BUT RAIN SHOWERS COULD CONTINUE IN THE GULF COAST STATES  
THROUGH MONDAY MORNING WITH SUFFICIENT MOISTURE FROM THE GULF.  
 
FARTHER WEST, AN UPPER-LEVEL LOW IS FORECAST TO MOVE SLOWLY  
THROUGH THE FOUR CORNERS REGION THROUGH THE WEEKEND, WHICH WILL  
ALLOW SOME SNOW TO ACCUMULATE IN THE CENTRAL AND SOUTHERN ROCKIES.  
4 TO 8 INCHES OF SNOW IS POSSIBLE IN THE HIGHER ELEVATIONS OF THE  
SAN JUAN MOUNTAINS. BY SUNDAY NIGHT, LIGHT SNOW IS EXPECTED TO  
FORM IN THE NORTHERN ROCKIES AND NORTHERN HIGH PLAINS, ASSOCIATED  
WITH A SURFACE LOW. ANOTHER LOW APPROACHING THE WEST COAST WILL  
INCREASE RAIN CHANCES LATE SUNDAY IN THE PACIFIC NORTHWEST AFTER A  
DRY PERIOD.  
 
ON SATURDAY, HIGH TEMPERATURES WILL BE 15 TO 25 DEGREES BELOW  
NORMAL IN THE CENTRAL/SOUTHERN PLAINS TO MIDDLE MISSISSIPPI VALLEY  
BEHIND THE STRONG COLD FRONT. AHEAD OF THE FRONT, THE EAST IS  
EXPECTING TEMPERATURES 10 TO 20 DEGREES ABOVE AVERAGE ON SATURDAY,  
BUT BY SUNDAY, THE OHIO AND TENNESSEE VALLEYS WILL SEE HIGH  
TEMPERATURES 10 TO 20 DEGREES BELOW AVERAGE, WHICH IS A LARGE  
TEMPERATURE SWING BETWEEN SATURDAY AND SUNDAY. THE WEST COAST IS  
EXPECTED TO WARM UP AND BE AROUND 10 DEGREES ABOVE AVERAGE THIS  
WEEKEND.  
 
TATE  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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