[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 251846
SWOMCD
SPC MCD 251846
VAZ000-WVZ000-NCZ000-TNZ000-251945-

MESOSCALE DISCUSSION 0563
NWS STORM PREDICTION CENTER NORMAN OK
0146 PM CDT SAT APR 25 2009

AREAS AFFECTED...WRN NC/VA

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 251846Z - 251945Z

ISOLD PULSE THUNDERSTORMS CAPABLE OF MARGINALLY SVR HAIL/WIND WILL
CONTINUE TO DEVELOP THROUGH THE AFTERNOON.

VISIBLE SATELLITE IMAGERY REFLECTS A LINE OF CU DEVELOPING ALONG THE
BLUE RIDGE MOUNTAINS OF VA/NC...SWWD INTO HIGHER TERRAIN OF NRN GA.
FORCED CONVERGENCE/UPSLOPE ALONG THE LEE OF THE MOUNTAINS AROUND THE
PERIPHERY OF A SFC HIGH TO THE E HAVE PROVIDED FAVORABLE
LIFT...ALLOWING INITIATION OF CONVECTION DESPITE UNFAVORABLE RIDGING
ALOFT. STRONG SURFACE HEATING...MODEST DEW POINTS...AND STEEP LAPSE
RATES WILL CONTINUE TO SUPPORT DEVELOPMENT IN A MARGINALLY UNSTABLE
ENVIRONMENT AS CINH WEAKENS. GIVEN THE CLOSE PROXIMITY OF THE UPPER
RIDGE...WIND FIELD WILL REMAIN LIGHT...CONDUCIVE MAINLY TO
BRIEF-LIVED PULSE STORMS CAPABLE OF MARGINALLY SVR HAIL...GIVEN A
SUSTAINED UPDRAFT. AS STORMS COLLAPSE...RELATIVELY DRY LOW LEVELS
MAY ENHANCE DOWNDRAFT WINDS IN EVAPORATIONAL COOLING. GIVEN
ISOLD/MARGINAL NATURE...A WW IS NOT ANTICIPATED AT THIS TIME.

..HURLBUT.. 04/25/2009

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

ATTN...WFO...LWX...RNK...RLX...GSP...MRX...

LAT...LON   35748227 35028305 35008421 35488416 35968324 36958138
            39157890 38687849 38127891 36708033 35748227

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