[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 271806
SWOMCD
SPC MCD 271805
GAZ000-TNZ000-ALZ000-271930-

MESOSCALE DISCUSSION 0626
NWS STORM PREDICTION CENTER NORMAN OK
0105 PM CDT WED APR 27 2011

AREAS AFFECTED...MUCH OF AL INTO MIDDLE TN/NORTHWEST GA

CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY

VALID 271805Z - 271930Z

A LONG DURATION PARTICULARLY DANGEROUS /PDS/ TORNADO WATCH WILL BE
ISSUED BY MID AFTERNOON FOR MUCH OF AL INTO MIDDLE TN/NORTHWEST
GA...WITH AN ISSUANCE PROBABLE BY AROUND 19Z.

AMID CLOUD BREAKS...THE AIRMASS CONTINUES TO QUICKLY DESTABILIZE IN
THE WAKE OF A DECAYING MORNING WEST-EAST BOUNDARY ACROSS AL...AND TO
THE SOUTH OF A MORE RECENT MCS-INDUCED BOUNDARY/COLD POOL ACROSS FAR
NORTHERN AL. WITH A CLASSIC/SYNOPTICALLY EVIDENT OUTBREAK SETUP VIA
A SHORTWAVE TROUGH/STRONG JET STREAK CURRENTLY NEARING THE
LOWER-MIDDLE MS RIVER VALLEY PER SATELLITE IMAGERY...AN INCREASINGLY
VOLATILE SETUP IS LIKELY THROUGH THE AFTERNOON. SUPERCELLS CAPABLE
OF STRONG/VIOLENT TORNADOES ARE EXPECTED TO BECOME PREVALENT ACROSS
AN INCREASINGLY UNSTABLE/WEAKLY CAPPED WARM SECTOR...WITH WSR-88D
VWP OBSERVED AND RUC FORECASTS REFLECTING INCREASINGLY LONG/LOOPING
LOW LEVEL HODOGRAPHS. IN THE WAKE OF A MORNING SEVERE MCS...THE
AIRMASS IS EXPECTED TO RAPIDLY RECOVER ACROSS FAR NORTHERN AL INTO
MIDDLE TN BY LATE AFTERNOON/EARLY EVENING.

..GUYER.. 04/27/2011

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

ATTN...WFO...MRX...FFC...OHX...BMX...HUN...MOB...

LAT...LON   31738724 31628828 33268819 35858732 34808504 31738724


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