|Mesoscale Discussion 1780|
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Mesoscale Discussion 1780
NWS Storm Prediction Center Norman OK
0357 PM CST Mon Dec 04 2017
Areas affected...Much of southwest...central and northeast
MO...extreme southeast KS...and extreme west central IL
Concerning...Severe Thunderstorm Watch 518...
Valid 042157Z - 042330Z
The severe weather threat for Severe Thunderstorm Watch 518
SUMMARY...Severe storms will continue to develop across severe
thunderstorm watch 518 as a cold front advances east through this
region. Damaging winds remain the primary threat, though a brief
tornado cannot be ruled out. Counties can be cleared from the west
with the cold front passage.
DISCUSSION...At 2140Z, mosaic radar imagery indicated a broken band
of strong to severe storms extending from north-central to southwest
MO, with additional storms in extreme southeast KS. This activity
will continue to advance through a narrow corridor of generally
marginal instability (surface-based CAPE less than 1000 J/kg).
Strong effective bulk shear up to 50 kt is supporting organized
storms with a few supercells detected per area WSR-88Ds. SGF VWP
indicated vertically veering and strengthening low-level winds which
favor a threat for damaging winds, while a tornado risk cannot be
ruled out, though weak buoyancy may temper the latter threat.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 36999499 38799398 39899334 40589307 40379200 40149089
39929058 39439061 38309164 37179219 36539213 36489337
36569460 36929483 36999499
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