[BNAWX] Severe Storm Outlook Narrative

Tue Jul 18 17:47:06 CDT 2023

ACUS11 KWNS 182246
SWOMCD
SPC MCD 182246
NCZ000-GAZ000-TNZ000-ALZ000-MSZ000-190145-

Mesoscale Discussion 1622
NWS Storm Prediction Center Norman OK
0546 PM CDT Tue Jul 18 2023

Areas affected...northern Alabama...eastern Tennessee...northwest
Georgia

Concerning...Severe Thunderstorm Watch 512...

Valid 182246Z - 190145Z

The severe weather threat for Severe Thunderstorm Watch 512
continues.

SUMMARY...Locally damaging gusts will remain possible from northern
Alabama into eastern Tennessee, and perhaps far northwest Georgia.
While the severe threat may extend east of WW 512, eastward extent
appears limited.

DISCUSSION...An MCS with expansive outflow continues to move
east/southeast across Middle TN and now into northern AL where the
strongest cells exist. Recently, wind gusts of 45-52 kt have been
measured over northern AL and far southern TN. Surface observations
indicate much drier air near the Atlanta area and points east, with
objective analysis indicating an MLCAPE drop of over 1000 J/kg
between Huntsville and Atlanta.

Western portions of the line will continue to interact with the
stronger instability, but the line orientation appears less
favorable for anything but a localized severe threat. Later this
evening, a conditional risk of additional severe gusts will exist
should the MCS near Memphis remain intact.

..Jewell.. 07/18/2023

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

ATTN...WFO...GSP...MRX...FFC...OHX...BMX...HUN...MEG...

LAT...LON   33918494 33778558 33768726 33858811 34488815 34748794
            34568729 34608672 34928620 35438583 35828562 36128520
            36298452 36078406 35178367 34528392 34188428 33918494
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