[BNAWX] Severe Storm Outlook Narrative

EMWIN Server emwin at nashvilleweather.net
Tue Feb 22 05:47:39 CST 2022


ACUS11 KWNS 221147
SWOMCD
SPC MCD 221146
KYZ000-TNZ000-ILZ000-MOZ000-ARZ000-221315-

Mesoscale Discussion 0167
NWS Storm Prediction Center Norman OK
0546 AM CST Tue Feb 22 2022

Areas affected...Portions of central/eastern AR...far southeastern
MO...far southern IL...and western KY/TN

Concerning...Tornado Watch 25...

Valid 221146Z - 221315Z

The severe weather threat for Tornado Watch 25 continues.

SUMMARY...An isolated severe threat continues across Tornado Watch
25.

DISCUSSION...The leading edge of a bowing line continues to race
quickly east-northeastward across northeastern AR towards the MS
River. Low 60s surface dewpoints are present ahead of this line into
parts of western/central KY, with surface winds backed to a
southeasterly direction. Boundary-layer instability remains weak
across this region, with MLCAPE generally 250-500 J/kg per recent
mesoanalysis estimates. Regardless, recent VWPs from KNQA/KPAH show
ample low-level and deep-layer shear present to support thunderstorm
organization. The best chance in the short term for strong to
damaging winds and a brief embedded tornado or two should remain
focused with the segment of the bowing line in northeastern
AR/southeastern MO into western KY/TN that has some orthogonal
component to the deep-layer shear vector. Effective SRH also appears
to be maximized in this area with a 50+ southwesterly jet present.
The trailing portion of the line in central AR has acquired a more
parallel northeasterly motion with the strong southwesterly flow
aloft. The overall severe threat with southwestward extent into AR
should become more isolated with time, but occasional strong/gusty
winds will still be possible.

..Gleason.. 02/22/2022

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

ATTN...WFO...OHX...PAH...MEG...LZK...

LAT...LON   34699281 35259184 35689083 36079038 36279010 36858990
            37468943 37488855 37128787 36558766 35448824 35039031
            34479161 34429263 34699281
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