SWOMCD
SPC MCD 111441
GAZ000-ALZ000-111615-
MESOSCALE DISCUSSION 1047
NWS STORM PREDICTION CENTER NORMAN OK
0941 AM CDT THU JUN 11 2009
AREAS AFFECTED...NERN AL INTO NRN GA
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 111441Z - 111615Z
TSTMS ARE EXPECTED TO BECOME MORE NUMEROUS SWD ALONG CONFLUENCE BAND
ASSOCIATED WITH MCV. AN ADDITIONAL WW MAY BECOME NECESSARY BY LATE
MORNING OR EARLY AFTERNOON.
WELL-DEFINED MCV N OF MSL CONTINUES TO MOVE ENEWD AT AROUND 30 KT.
THUS FAR...THE MOST INTENSE AND WIDESPREAD STORMS REMAIN CONFINED TO
VICINITY OF MCV OVER MIDDLE TN WITH MORE ISOLATED STORMS IN PROGRESS
TO THE S OF HSV. WITH TIME...STORMS MAY TEND TO BUILD SWD ALONG
LOW-LEVEL CONFLUENT ZONE ATTENDANT TO MCV...PERHAPS MERGING WITH
MORE ISOLATED STORMS TO THE S.
12Z BHM/ATL SOUNDINGS INDICATED THE PRESENCE OF A RATHER MOIST
BOUNDARY LAYER WITH DEWPOINTS IN THE LOWER 70S AND 100 MB MEAN
MIXING RATIOS OF 15-16 G/KG. MORNING VISIBLE SATELLITE IMAGERY
SUGGESTS THAT STRONG DIABATIC HEATING SHOULD OCCUR ACROSS IMMEDIATE
DOWNSTREAM AIR MASS WHICH...WHEN COUPLED WITH THE MOIST BOUNDARY
LAYER...WILL CONTRIBUTE TO MLCAPE APPROACHING 2000-2500 J/KG. VWP
DATA FROM COLUMBUS AFB AND HSV INDICATE 40-50 KT WLY FLOW IN THE 3-4
KM AGL LAYER WHICH MAY SERVE TO PROMOTE THE DEVELOPMENT OF BOWING
STRUCTURES CAPABLE OF DAMAGING WINDS AND SOME HAIL.
..MEAD.. 06/11/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FFC...BMX...HUN...
LAT...LON 34628659 34938611 34978459 34938395 34618374 34268395
34048481 34018570 34258644 34628659
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