[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 272238
SWOMCD
SPC MCD 272238
TNZ000-NCZ000-280015-

MESOSCALE DISCUSSION 0636
NWS STORM PREDICTION CENTER NORMAN OK
0538 PM CDT WED APR 27 2011

AREAS AFFECTED...MIDDLE/EASTERN TN TO FAR WESTERN NC

CONCERNING...TORNADO WATCH 238...

VALID 272238Z - 280015Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 238 CONTINUES.

PARTICULARLY DANGEROUS SITUATION /PDS/ TORNADO WATCH 238 CONTINUES
UNTIL 05Z ACROSS MIDDLE/EASTERN TN. THE POTENTIAL FOR
TORNADOES...INCLUDING STRONG TORNADOES...WILL ONLY INCREASE THROUGH
EARLY/MID EVENING. THE RELATIVELY HIGHEST TORNADIC POTENTIAL
INVOLVES SOUTHERN MIDDLE TN/SOUTHEAST TN INCLUDING THE CHATTANOOGA
VICINITY AND I-24/I-75 CORRIDORS.

A COMPLEX CONVECTIVE MODE INCLUDING EMBEDDED TORNADIC SUPERCELLS
CONTINUE TO DEVELOP/QUICKLY SPREAD NORTHEASTWARD ACROSS PDS TORNADO
WATCH 238. OF CONCERN...THE AIRMASS ALONG A PRIOR OUTFLOW BOUNDARY
ALONG THE TN/AL BORDER CONTINUES TO RECOVER...WITH A CONTINUED
LIKELY NORTHWARD ADVANCEMENT INTO THE SOUTHERN PART OF MIDDLE TN AS
WELL AS MUCH OF EASTERN TN THIS EVENING. ACCORDINGLY...RICHER LOW
LEVEL MOISTURE /LOWER-MIDDLE 60S F SURFACE DEWPOINTS/ WILL CONTINUE
TO SURGE NORTH-NORTHEASTWARD...HEIGHTENING TORNADO POTENTIAL
ESPECIALLY ACROSS SOUTHEAST TN. ADDITIONALLY...RAPID AIRMASS
RECOVERY/DESTABILIZATION CONTINUES TO OCCUR UPSTREAM ACROSS WESTERN
TN BENEATH THE MID LEVEL DRYSLOT...AND THIS WILL FURTHER AID
DESTABILIZATION INTO MIDDLE TN THIS EVENING. WITH SUPERCELLS
REMAINING LIKELY INTO THIS EVENING...EXTREME SHEAR/LOW LEVEL SHR
WILL BE HIGHLY FAVORABLE FOR TORNADIC SUPERCELLS...INCLUDING THE
POSSIBILITY OF STRONG TORNADOES.

..GUYER.. 04/27/2011

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

ATTN...WFO...GSP...MRX...OHX...HUN...

LAT...LON   35198736 36408668 36318268 35108437 35198736


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