929  
FXUS01 KWBC 190753  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
252 AM EST TUE FEB 19 2019  
 
VALID 12Z TUE FEB 19 2019 - 12Z THU FEB 21 2019  
 
...UNSETTLED WEATHER PATTERN DEVELOPING ACROSS THE SOUTH-CENTRAL  
PART OF THE NATION THROUGH MIDWEEK...  
 
AN ACTIVE WEATHER PATTERN IS RETURNING TO MUCH OF THE EASTERN U.S.  
AFTER A BRIEF DRY SPELL ON MONDAY. THE NEXT STORM SYSTEM IS  
DEVELOPING OVER THE WESTERN GULF OF MEXICO TODAY AND WILL EXTEND  
NORTHWARD ALONG A FRONTAL ZONE BY EARLY WEDNESDAY. THERE WILL BE  
A DEEP NORTHWARD SURGE OF MOISTURE FROM THE GULF, AND THE FRONTAL  
BOUNDARY WILL LIFT THIS MOISTURE AND GENERATE A CORRIDOR OF  
COPIOUS RAINFALL FROM LOUISIANA TO EASTERN KENTUCKY, WITH  
WIDESPREAD 2 TO 5 INCH RAINFALL AMOUNTS EXPECTED BY THURSDAY  
MORNING. WITH MUCH OF THIS FALLING ON ALREADY MOIST GROUND FROM  
THE RAINFALL THIS PAST WEEKEND, FLOODING WILL BE A CONCERN AND A  
MODERATE RISK OF EXCESSIVE RAINFALL EXISTS OVER PARTS OF THAT  
REGION. SOME STRONG THUNDERSTORMS MAY ALSO DEVELOP ACROSS PARTS  
OF THE DEEP SOUTH. FARTHER TO THE NORTHEAST, SNOW AND FREEZING  
RAIN ARE EXPECTED FOR THE CENTRAL APPALACHIANS AND THE NORTHERN  
MID-ATLANTIC BY LATE TUESDAY NIGHT AND INTO WEDNESDAY AS MOISTURE  
INTERSECTS A COLD AIRMASS IN PLACE. SEVERAL INCHES OF SNOW IS  
LIKELY BEFORE CHANGING TO SLEET AND FREEZING RAIN, MAINLY ALONG  
AND WEST OF INTERSTATE 95. SIGNIFICANT ICING IS POSSIBLE FOR SOME  
INLAND VALLEY LOCATIONS.  
 
MORE MODERATE TO HEAVY SNOW IS EXPECTED ACROSS THE CASCADES AND  
NORTHERN ROCKIES FOR THE MIDDLE OF THE WEEK. WINTER STORM  
WARNINGS AND WINTER WEATHER ADVISORIES ARE IN EFFECT FOR THESE  
AREAS WITH THE POTENTIAL FOR SNOWFALL AMOUNTS IN EXCESS OF 8  
INCHES FOR THE HIGHER MOUNTAIN RANGES. THE NEXT ROUND OF SNOW  
BEGINS ARRIVING TO SOUTHERN UTAH AND NORTHERN ARIZONA BY THURSDAY.  
 
ELSEWHERE ACROSS THE CONTINENTAL U.S., VERY COLD TEMPERATURES ARE  
EXPECTED FROM MONTANA TO MINNESOTA WITH HIGHS IN THE TEENS AND LOW  
20S WITH A LARGE ARCTIC SURFACE HIGH FROM CANADA IN PLACE AND  
SLOWLY MOVING EASTWARD. WIND CHILL ADVISORIES ARE IN EFFECT FOR  
SOME AREAS. ACROSS THE CENTRAL PLAINS AND UPPER MIDWEST, MODERATE  
TO LOCALLY HEAVY SNOW IS FORECAST ON TUESDAY AND INTO WEDNESDAY ON  
THE BACKSIDE OF THE DEVELOPING SURFACE LOW.  
 
D. HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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