MESO: Mesoscale Discussion 1746

ACUS11 KWNS 261820
SWOMCD
SPC MCD 261819
SCZ000-GAZ000-FLZ000-261945-

MESOSCALE DISCUSSION 1746
NWS STORM PREDICTION CENTER NORMAN OK
0119 PM CDT THU AUG 26 2010

AREAS AFFECTED...SRN GA AND SRN SC

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 261819Z - 261945Z

ISOLATED WET MICROBURSTS PRODUCING DAMAGING DOWNBURST WINDS WILL BE
POSSIBLE ACROSS SRN GA AND SRN SC THIS AFTERNOON. LIMITED NATURE OF
THE SVR WEATHER THREAT WILL PRECLUDE A WW.

EARLY AFTERNOON WV IMAGERY SHOWS A WEAK UPPER LEVEL TROUGH EXTENDING
SWWD ACROSS THE MID ATLANTIC REGION INTO THE SERN
STATES...ACCOMPANIED BY COOLER MID-LEVEL TEMPERATURES...WHICH ARE
AIDING IN THE DEVELOPMENT OF STEEPER LAPSE RATES COMPARED TO THE
PAST FEW DAYS. AT THE SURFACE...VISIBLE SATELLITE IMAGERY AND
SURFACE OBSERVATIONS INDICATE A WEAK FRONTAL WAVE DEVELOPING OVER
THE AREA...WITH A WARM FRONT EXTENDING EWD FROM LOW PRESSURE OVER
SERN AL/SWRN GA...AND A STATIONARY FRONT EXTENDING SWWD INTO THE
GOM. TEMPERATURES ARE WARMING INTO THE 90S F S OF THE WARM FRONT
OVER SRN GA...WITH DEWPOINTS IN THE MID 70S F. FARTHER N OVER SRN
SC...SATELLITE IMAGERY SHOWS A CONVERGENT SEA BREEZE BOUNDARY HAS
DEVELOPED DURING THE LAST HR OR SO...AND IS FOCUSING RECENT
THUNDERSTORM DEVELOPMENT.

THE VERY WARM/MOIST BOUNDARY LAYER AIR MASS IS LEADING TO THE
DEVELOPMENT OF HIGH SURFACE THETA-E VALUES AS WELL AS MLCAPE AOA
2500 J/KG. THIS ENVIRONMENT WILL PROMOTE CONTINUED THUNDERSTORM
DEVELOPMENT ALONG THE PREVIOUSLY MENTIONED BOUNDARIES...AS WELL AS
THE DESTABILIZING WARM SECTOR. DUE TO WEAK VERTICAL WIND SHEAR
PROFILES...MULTICELLS AND PULSE TYPE STORMS ARE EXPECTED TO
PREDOMINATE. HOWEVER...GIVEN THE HOT SURFACE AIR MASS AND STEEPENING
LOW-LEVEL LAPSE RATES COMBINED WITH LARGE CAPE AND HIGH PWAT
VALUES...A FEW OF THESE STORMS MAY POSE A THREAT FOR WET MICROBURSTS
AND DAMAGING DOWNDRAFT WINDS.

..GARNER.. 08/26/2010

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...CHS...CAE...JAX...FFC...TAE...

LAT...LON 32398368 33168179 32998020 32178021 30478189 30658369
32398368

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.