|Mesoscale Discussion 1758|
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Mesoscale Discussion 1758
NWS Storm Prediction Center Norman OK
0251 PM CST Sun Nov 05 2017
Areas affected...Southeastern Missouri...southern and central
Illinois...and a small part of western Kentucky
Concerning...Tornado Watch 512...
Valid 052051Z - 052245Z
The severe weather threat for Tornado Watch 512 continues.
SUMMARY...The severe threat continues across much of WW 512. A new
tornado watch is being considered south and east of WW 512.
DISCUSSION...Scattered storms continue to develop primarily along a
southeastward-moving cold front along northern portions of the
discussion area. A few of these storms have produced severe wind
gusts and large hail - particularly near the Saint Louis
Metropolitan Area. Northeast of STL, storms have been mostly
elevated along and just behind the cold front, although they may
become surface based as they forward-propagate eastward toward
greater surface-based instability over the next couple of hours.
Farther southwest, additional convection has continued to increase
along and ahead of the cold front. A greater supercell threat may
emerge with this activity given its more cellular mode, moderate
surface-based instability, and veering wind fields. These cells
will likely pose a threat for all modes of severe over the next few
hours and eventually extend east/south of WW 512. A new tornado
watch will be needed in these areas relatively soon.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 38189140 38869073 39568943 40048822 40088760 39368728
38338723 37878727 37258783 36878908 36879037 36899103
37109159 37699172 38189140
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