[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 122219
SWOMCD
SPC MCD 122219
VAZ000-NCZ000-SCZ000-WVZ000-TNZ000-GAZ000-122245-

MESOSCALE DISCUSSION 0765
NWS STORM PREDICTION CENTER NORMAN OK
0519 PM CDT THU MAY 12 2011

AREAS AFFECTED...NERN HALF OF OH / FAR WRN PA / NRN-CNTRL WV

CONCERNING...SEVERE THUNDERSTORM WATCH 290...

VALID 122219Z - 122245Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 290
CONTINUES.

WW 290 WILL BE ALLOWED TO EXPIRE AT 23Z.  UNTIL THEN...AN ISOLD
STRONG WIND GUST MAY OCCUR WITH THE STRONGER CORES.

WATER VAPOR IMAGERY SHOWS A WEAK MID LEVEL PERTURBATION CRESTING THE
UPPER RIDGE OVER SWRN ONTARIO/LAKE ERIE THAT HAS BEEN PARTIALLY
RESPONSIBLE FOR THIS AFTERNOON/S STORM CLUSTER IN THE UPPER OH
VALLEY.  SURFACE ANALYSIS PLACES A GENERALLY N-S OUTFLOW BOUNDARY
FROM 30 MI NW MFD /WHERE STORMS ARE TRYING TO REGENERATE/ SSEWD TO
NEAR ZZV AND SWD INVOF CRW.  CONVECTIVE OVERTURNING OF THE AIRMASS E
OF THE BOUNDARY WHERE THE ONGOING STORMS ARE LOCATED WILL ACT TO
CONTINUE TO LESSEN STORM INTENSITY AS BUOYANCY IS FURTHER
MARGINALIZED.  STRONGLY VEERING WIND PROFILE /ALBEIT WEAK/ WILL
LIMIT STORM ORGANIZATION POTENTIAL AND STORM CLUSTERS OVER THE
REGION ARE EXPECTED TO WEAKEN THIS EVENING DUE IN PART TO LOSS OF
HEATING.

..SMITH.. 05/12/2011

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

ATTN...WFO...RAH...ILM...RNK...RLX...CAE...GSP...MRX...

LAT...LON   37668168 37808043 37527985 37157941 36767922 36057914
            35167939 34447960 33648012 33188079 33408185 34858338
            36418311 37668168



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