830  
FXUS01 KWBC 080752  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
251 AM EST FRI MAR 8 2019  
 
VALID 12Z FRI MAR 8 2019 - 12Z SUN MAR 10 2019  
 
...STRONG LOW PRESSURE SYSTEM IS EXPECTED TO PRODUCE A VARIETY OF  
SIGNIFICANT WEATHER IMPACTS OVER THE UPCOMING WEEKEND ACROSS THE  
CENTRAL AND EASTERN PART OF THE NATION...  
 
THE WEATHER WILL BE QUITE ACTIVE ACROSS A LARGE PART OF THE NATION  
FOR THE END OF THE WEEK AND GOING INTO THE WEEKEND. THE PRIMARY  
FOCUS INITIALLY WILL BE ACROSS THE WEST AS A COUPLE OF SEPARATE  
STORM SYSTEMS BRING RATHER WIDESPREAD RAIN AND SNOW ACROSS  
PORTIONS OF THE PACIFIC NORTHWEST, THE GREAT BASIN AND INTO THE  
ROCKIES. HEAVY ACCUMULATING SNOWFALL IS EXPECTED FOR THE HIGHER  
TERRAIN INCLUDING AREAS OF THE CASCADES, THE SIERRA NEVADA, AND  
THE CENTRAL ROCKIES GOING THROUGH FRIDAY WHERE AS MUCH AS AN  
ADDITIONAL FOOT OF SNOW MAY ACCUMULATE BY FRIDAY NIGHT.  
 
SURFACE CYCLOGENESIS IS EXPECTED TO COMMENCE JUST EAST OF THE  
ROCKIES FRIDAY NIGHT AND EARLY SATURDAY AS THE STRONG UPPER LEVEL  
SHORTWAVE APPROACHES FROM THE WEST. THE SURFACE LOW IS FORECAST  
TO INTENSIFY AS IT TRACKS TOWARDS THE NORTHEAST FROM KANSAS TO  
MICHIGAN THROUGH EARLY SUNDAY. THE ATMOSPHERIC INGREDIENTS WILL  
BE IN PLACE FOR A MAJOR WINTER STORM FROM NEBRASKA TO WISCONSIN,  
AND THE POTENTIAL EXISTS FOR BLIZZARD CONDITIONS ACROSS MUCH OF  
THE EASTERN DAKOTAS AND CENTRAL MINNESOTA AS THE PRESSURE GRADIENT  
TIGHTENS AND WINDS INCREASE TO OVER 35 MPH. WIDESPREAD WINTER  
STORM WATCHES ARE CURRENTLY IN AFFECT AS OF EARLY FRIDAY MORNING,  
AND THESE WILL LIKELY BE UPGRADED TO WARNINGS AS THE EVENT GETS  
CLOSER IN TIME. SOME OF THESE AREAS COULD GET 6 TO 12 INCHES OF  
SNOW WITH LOCALLY HIGHER AMOUNTS.  
 
FARTHER SOUTH AND EAST, HEAVY RAIN AND SEVERE THUNDERSTORMS WILL  
BE MAKING WEATHER HEADLINES AS A WARM AND HUMID AIR MASS SURGES  
NORTHWARD FROM THE GULF OF MEXICO AHEAD OF THE COLD FRONT, AND  
SOME INSTANCES OF FLOODING MAY BE REALIZED. THE STORMS THAT  
DEVELOP WILL BECOME CAPABLE OF PRODUCING STRONG WINDS, LARGE HAIL  
AND ALSO SOME TORNADOES FROM THE CENTRAL GULF COAST TO KENTUCKY  
FRIDAY NIGHT THROUGH SATURDAY. NEAR THE COLD FRONT ACROSS THE  
SOUTHERN HIGH PLAINS WILL BE VERY DRY AIR AND GUSTY WINDS, WHICH  
IS EXPECTED TO CREATE ELEVATED FIRE WEATHER CONCERNS AS THE  
SURFACE LOW TO THE NORTH INTENSIFIES.  
 
ELSEWHERE, THE EASTERN U.S. WILL GENERALLY BE COOLER THAN NORMAL  
THROUGH SATURDAY, AND THERE WILL BE A THREAT FOR SOME RAIN AND  
SNOW ON FRIDAY ACROSS THE TENNESSEE VALLEY, CENTRAL APPALACHIANS  
AND MID-ATLANTIC REGION. TEMPERATURES SHOULD BEGIN TO WARM UP BY  
SUNDAY AHEAD OF THE STORM SYSTEM APPROACHING FROM THE MIDWEST, BUT  
ONE EXCEPTION WILL BE THE NORTHEAST WHERE HIGH PRESSURE ARRIVING  
FROM SOUTHEAST CANADA WILL KEEP TEMPERATURES NOTABLY COLDER.  
 
D. HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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