Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 231802
SWOMCD
SPC MCD 231802
SCZ000-GAZ000-FLZ000-232000-

Mesoscale Discussion 0816
NWS Storm Prediction Center Norman OK
0102 PM CDT Tue May 23 2017

Areas affected...Portions of southern/eastern Georgia and
southern/central South Carolina

Concerning...Tornado Watch 257...

Valid 231802Z - 232000Z

The severe weather threat for Tornado Watch 257 continues.

SUMMARY...Storms will continue to advance east/northeast across
Watch 257 this afternoon, with an attendant threat for a few
tornadoes and damaging wind gusts. Conditions will likely remain
favorable for these hazards through the late afternoon and evening
hours, and a downstream tornado watch will likely be needed within
the next 1-2 hours.

DISCUSSION...Surface and mesoanalysis data indicate a weak boundary
stretching eastward across south-central/southeastern Georgia and
extending into southern South Carolina. Strong to occasionally
severe storms have focused along and to the south of this boundary
within a modestly heated warm sector. Surface observations depict
pressure falls upwards of 1 mb/hr near the boundary, and weak low
pressure currently over southeast Alabama will likely evolve
east/northeast within this corridor through the afternoon and
evening hours. As such, slight backing of low-level flow will likely
occur along the boundary in advance of this low, resulting in some
enhancement of storm-relative helicity. With modest mixed-layer
buoyancy extending from southern Georgia into portions of South
Carolina, this wind profile will likely maintain the potential for
isolated damaging wind gusts and a couple tornadoes. Regional radar
data have confirmed this ongoing potential, with a recent debris
signature over eastern Crisp and western Wilcox Counties in Georgia.
Downstream tornado watch issuance is likely within the next 1-2
hours.

..Picca.. 05/23/2017

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

ATTN...WFO...ILM...CHS...CAE...JAX...FFC...TAE...

LAT...LON   32218394 32608313 32788300 33308192 33838096 33888046
            33657978 33207936 32318048 31618143 30598304 30558416
            30898436 31338416 31598410 32218394




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