Tuesday, November 22, 2011

MESO: Mesoscale Discussion 2358

ACUS11 KWNS 230057
SWOMCD
SPC MCD 230057
SCZ000-GAZ000-ALZ000-230230-

MESOSCALE DISCUSSION 2358
NWS STORM PREDICTION CENTER NORMAN OK
0657 PM CST TUE NOV 22 2011

AREAS AFFECTED...GA...SERN AL...WRN SC

CONCERNING...TORNADO WATCH 896...

VALID 230057Z - 230230Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 896 CONTINUES.

ISOLATED DAMAGING WIND/TORNADOES COULD REDEVELOP AT ANY TIME WITH
QLCS PROPAGATING EWD FROM NWRN GA AND SERN AL. ALTHOUGH A DOWNSTREAM
WW INTO NERN GA/WRN SC APPEARS UNLIKELY ATTM...THIS AREA IS BEING
CLOSELY MONITORED FOR A POSSIBLE WW.

DESPITE THE PRESENCE OF WEAK INSTABILITY PER 00Z FFC/TLH RAOBS WITH
MLCAPE AROUND 500 J/KG...LOW-LEVEL SWLYS AOA 30 KT ROUGHLY N OF A
TOI TO SAV LINE WILL REMAIN SUPPORTIVE OF SMALL-SCALE LEWPS/BOWS
CAPABLE OF PRODUCING DAMAGING WINDS OR BRIEF TORNADOES. THIS THREAT
SHOULD BE GREATEST THROUGH CNTRL GA INTO PERHAPS NRN GA AND WRN SC
AS THE STRONGEST LOW-LEVEL FLOW SHIFTS EWD. STILL...INCREASINGLY
MARGINAL INSTABILITY WITH NRN EXTENT BREEDS UNCERTAINTY OVER THE
NEED FOR AN EXTENSION/ADDITIONAL WW ISSUANCE. S OF WW 896...THE
SEVERE RISK SHOULD BE LIMITED BY WEAKER LOW-LEVEL FLOW WHICH IS
EXPECTED TO VEER...FURTHER MODERATING THE STRENGTH OF LOW-LEVEL
SHEAR.

..GRAMS.. 11/23/2011

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

ATTN...WFO...CAE...GSP...FFC...TAE...BMX...

LAT...LON 34358400 34628327 34568278 34328212 33988187 33438194
31948353 31438426 31398495 31698561 32128539 33268460
34358400

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