Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 222341
SWOMCD
SPC MCD 222340
NCZ000-GAZ000-TNZ000-ALZ000-MSZ000-230045-

Mesoscale Discussion 0549
NWS Storm Prediction Center Norman OK
0640 PM CDT Sat Apr 22 2017

Areas affected...Extreme southwest TN /western NC...northwest
GA...portions of central into northeast AL

Concerning...Severe Thunderstorm Watch 158...

Valid 222340Z - 230045Z

The severe weather threat for Severe Thunderstorm Watch 158
continues.

SUMMARY...A general weakening trend is expected heading into the
evening hours. A few strong/marginally severe storms may persist
another 1-2 hours, producing strong wind gusts and perhaps small
hail. However, threat will diminish with time and eastward extent
and a downstream watch is not expected.

DISCUSSION...Scattered strong to severe thunderstorms along a line
from far western NC/southwest TN through central AL into southern MS
will continue to track east this evening.  In general, recent
weakening trend should continue with loss of daytime heating and a
stabilizing boundary layer. Modest midlevel lapse rates and adequate
deep layer shear should sustain storms into the evening, and in the
short term /next 1-2 hours/ some strong gusts and small hail will be
possible. Given the marginal nature of the threat downstream of WW
158 and overall weakening trend, a downstream watch is not expected,
and WW 158 likely will be able to be canceled before the 02z
expiration time.

..Leitman.. 04/22/2017

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

ATTN...WFO...GSP...MRX...FFC...BMX...HUN...MOB...JAN...

LAT...LON   32238702 32038744 32008793 32128832 32668837 33378757
            34448630 35258490 35408431 35328391 35088375 34848384
            34298447 33978487 33048597 32238702



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