[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 282055
SWOMCD
SPC MCD 282054
PAZ000-NYZ000-MDZ000-WVZ000-VAZ000-OHZ000-NCZ000-TNZ000-KYZ000-SCZ000-GAZ000-282200-

MESOSCALE DISCUSSION 0885
NWS STORM PREDICTION CENTER NORMAN OK
0354 PM CDT THU MAY 28 2009

AREAS AFFECTED...PORTIONS OF THE UPPER OH VALLEY TO THE UPPER TN
VALLEY

CONCERNING...SEVERE THUNDERSTORM WATCH 313...

VALID 282054Z - 282200Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 313
CONTINUES.

AS OF 2045Z...RADAR/SATELLITE IMAGERY INDICATED STRONGER CONVECTIVE
ACTIVITY WAS LOCATED ALONG THE NRN AND SRN PERIPHERY OF WW 313 OVER
THE UPPER OH AND LOWER TN VALLEYS. THE NRN ACTIVITY CONSISTED MAINLY
OF SHORT-LINE SEGMENTS WITH MORE CELLULAR ELEMENTS FARTHER S.
HEATING/DESTABILIZATION WANES WITH NRN EXTENT...ALTHOUGH THIS HAS
BEEN COMPENSATED BY MORE ROBUST FORCING ASSOCIATED WITH A MID-LEVEL
IMPULSE EJECTING TOWARDS THE UPPER OH VALLEY. INCREASING
HIGHER-LEVEL WINDS HAVE BEEN NOTED IN TIME-SERIES TRENDS AT
CHARLESTON WV VAD PROFILER...WHICH SHOULD AID IN MAINTAINING OR EVEN
ENHANCING LINEAR ORGANIZATION GIVEN LARGELY UNIDIRECTIONAL PROFILES.
DAMAGING WINDS SHOULD BE THE PRIMARY THREAT FOR THE NEXT FEW HOURS
AS INDIVIDUAL CLUSTERS LIKELY EVOLVE NEWD. OVERALL THREAT DOES NOT
APPEAR SUFFICIENT FOR AN ADDITIONAL WW N OF WW 313...BUT TRENDS WILL
CONTINUE TO BE MONITORED.

FARTHER SW...UPDRAFTS HAVE GENERALLY STRUGGLED TO MAINTAIN SEVERE
INTENSITY DESPITE GREATER INSTABILITY. THE LACK OF STRONGER
LARGE-SCALE ASCENT MAY BE A LIMITING FACTOR. HOWEVER...WITH APPROACH
OF UPSTREAM COLD FRONT /FROM MIDDLE TN TO NWRN AL/...AN INCREASE IN
CONVECTIVE INTENSITY/COVERAGE MAY YET OCCUR.

..GRAMS.. 05/28/2009

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

ATTN...WFO...BGM...BUF...CTP...RNK...PBZ...RLX...CLE...GSP...
MRX...JKL...FFC...OHX...

LAT...LON   36478453 38678249 40328118 41637985 42567874 42407778
            42047751 41257791 40207861 38438015 37558078 36728135
            35938204 35148266 34648339 34848374 34938454 35068554
            35398568 36478453

This weather bulletin was brought to you by:
www.nashvilleweather.net