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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