Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 280100
SWOMCD
SPC MCD 280100
NCZ000-VAZ000-280130-

Mesoscale Discussion 0882
NWS Storm Prediction Center Norman OK
0800 PM CDT Sat May 27 2017

Areas affected...southeastern VA and eastern NC

Concerning...Severe Thunderstorm Watch 278...

Valid 280100Z - 280130Z

The severe weather threat for Severe Thunderstorm Watch 278
continues.

SUMMARY...A marginally severe hail risk will likely persist beyond
the 02Z watch expiration time.  A local watch extension-in-time
(EXT) will probably best address the remaining severe risk.

DISCUSSION...Radar mosaic shows a cluster of strong to severe
thunderstorms over southeastern VA and into far northeastern NC.
The 00Z MHX raob exhibited a very steep 700-500 lapse rate (8
degrees C/km) with a deep-layer shear profile supportive of
continued storm organization (44-kt effective shear).  The moisture
rich airmass over the coastal plain will be slow to cool this
evening with moderate buoyancy likely persisting for a few more
hours (MUCAPE 1500-2500 J/kg).  As such, a transient
supercell/organized multicellular storm mode will tend to at least
have an accompanying marginally severe hail risk and perhaps a
localized wind damage threat for the next few hours.

..Smith.. 05/28/2017

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...AKQ...MHX...RAH...

LAT...LON   35627756 37287817 37007668 36277583 35597556 35117583
            35137652 35627756




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