National Weather Service United States Department of Commerce

Heavy rain for portions of the Mid-Atlantic and New England through Saturday

A slow-moving weather system in the eastern U.S. will focus showers and thunderstorms across portions of New England and the Mid-Atlantic through Saturday. Abundant moisture will allow occasionally heavy rainfall and flash flooding in these locations. Read More >

Mesoscale Discussion #0426 issued at 1204 UTC 10 April 2009
MESOSCALE DISCUSSION 0426
NWS STORM PREDICTION CENTER NORMAN OK
0704 AM CDT FRI APR 10 2009
   
AREAS AFFECTED...NORTH GA INTO EXTREME WESTERN PORTIONS OF NC/SC
   
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
VALID 101204Z - 101330Z
   
ISOLATED DAMAGING WIND/HAIL THREAT MAY CONTINUE OVER THE NEXT FEW
HOURS MAINLY ACROSS FAR NORTHERN GA AND PERHAPS INTO THE EXTREME
WESTERN PORTIONS OF NC/SC. A WATCH IS NOT EXPECTED AT THIS TIME.
   
SMALL SCALE/75 MILE LONG MCS/BOW ECHO CONTINUES TO RACE
EAST-NORTHEASTWARD AT AROUND 45 KT INTO NORTHWEST GA TOWARD THE I-75
CORRIDOR AS OF 12Z. THIS MCS HAS AN UPSTREAM HISTORY OF ISOLATED
WIND DAMAGE/HAIL...AND A SIMILAR THREAT MAY CONTINUE OVER THE NEXT
FEW HOURS PRIMARILY ACROSS THE NORTH GA AREAS NORTH OF I-85. AIDED
BY A MID LEVEL IMPULSE...THIS MCS IS GENERALLY BEING FED VIA AN
INCREASINGLY MOIST/UNSTABLE AIRMASS FROM THE SOUTHWEST. ORGANIZED
NATURE OF THE MCS WILL CONTINUE TO SUPPORT A CONTINUED SEVERE RISK
IN THE SHORT TERM...ALTHOUGH A PRE-MCS TREND FOR COOLING SURFACE
TEMPERATURES IMPLIES THAT THIS SYSTEM MAY BECOME INCREASINGLY ROOTED
ABOVE A COOL NEAR-SURFACE LAYER. WITH THE EXPECTATION THAT THE
SEVERE THREAT WILL REMAIN FAIRLY ISOLATED THIS MORNING...A WATCH IS
NOT CURRENTLY ANTICIPATED.
   
..GUYER.. 04/10/2009
  
   
ATTN...WFO...GSP...MRX...FFC...BMX...
   
LAT...LON   35018499 35118404 34938296 34378303 33748436 33698586
            34358545 35018499