[BNAWX] Severe Storm Outlook Narrative

EMWIN Server emwin at nashvilleweather.net
Thu Jun 28 19:31:27 CDT 2018


ACUS11 KWNS 290031
SWOMCD
SPC MCD 290030
KYZ000-INZ000-TNZ000-ILZ000-MOZ000-ARZ000-290200-

Mesoscale Discussion 0931
NWS Storm Prediction Center Norman OK
0730 PM CDT Thu Jun 28 2018

Areas affected...Far southeast Missouri...southern Illinois...far
west Kentucky...far northwest Tennessee

Concerning...Severe Thunderstorm Watch 237...

Valid 290030Z - 290200Z

The severe weather threat for Severe Thunderstorm Watch 237
continues.

SUMMARY...Severe threat continues for Severe Thunderstorm Watch
0237. Widespread damaging winds possible with well-organized bow
echo.

DISCUSSION...A small, but highly organized MCS displaying bowing
characteristics is moving southward at over 40 knots, driven by both
a strong surface cold pool and rear-inflow jet aloft. Despite modest
mid-level flow, current RAP soundings suggest a very moist,
well-mixed, and strongly buoyant airmass is present ahead of this
bow echo, suggesting that the stronger winds aloft within the
rear-inflow jet may quickly mix down to the surface. As such,
widespread damaging winds cannot be ruled out within a narrow
corridor centered around the apex of the bow.

The threat for damaging winds may continue well into the evening,
until boundary-layer stabilization may begin to inhibit the downward
transport of damaging winds to the surface several hours from now. A
new Severe Thunderstorm Watch may be necessary for middle and
western Tennessee if the convective complex remains organized.

..Squitieri/Gleason/Edwards.. 06/29/2018

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

ATTN...WFO...OHX...PAH...ILX...MEG...LSX...

LAT...LON   38669039 38468983 38358916 38468862 38608813 38168777
            38108765 37858758 37408759 36878760 36628767 36378793
            36098834 35928879 35908942 36008989 36299007 36869024
            37539052 37719052 38289054 38669039
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