Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 232135
SWOMCD
SPC MCD 232135
TNZ000-MSZ000-MOZ000-ARZ000-232300-

Mesoscale Discussion 1140
NWS Storm Prediction Center Norman OK
0435 PM CDT Fri Jun 23 2017

Areas affected...Portions of northern/central AR...far southeastern
MO...far western TN...and far northwestern MS

Concerning...Severe Thunderstorm Watch 367...

Valid 232135Z - 232300Z

The severe weather threat for Severe Thunderstorm Watch 367
continues.

SUMMARY...An isolated strong/gusty wind threat with associated risk
for tree damage continues with a line of thunderstorms moving
southeastward across WW 367.

DISCUSSION...Outflow has recently surged ahead of an ongoing line of
thunderstorms across parts of northern/central AR per KLZK radar
imagery. The eastern extent of the line (across northeastern AR)
remains more orthogonal to modest northwesterly mid-level flow, and
may pose a locally greater damaging wind risk over the next several
hours as it approaches the AR/TN state line. The forecast office in
Memphis TN has recently expanded the watch eastward slightly into
far western TN/northwestern MS to account for this threat. An
isolated strong/gusty wind risk should also continue farther west
into central AR, where sporadic instances of trees down have been
reported this afternoon. The airmass downstream of ongoing
convection remains moderately to strongly unstable per 21Z RAP
Mesoanalysis, and should support the continuation of the line
through the early evening hours. Later this evening, the loss of
daytime heating with resultant lessening of instability and
continued modest mid-level winds should result in gradual weakening
of the line.

..Gleason.. 06/23/2017

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

ATTN...WFO...MEG...LZK...

LAT...LON   35299364 35499357 35339294 35249226 35329175 35749127
            36369076 36288958 36188913 34588971 34139022 34179069
            34149192 34279364 35299364




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