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| Mesoscale Discussion 583 | |
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Mesoscale Discussion 0583
NWS Storm Prediction Center Norman OK
0808 PM CDT Mon Apr 27 2026
Areas affected...west-central IN...central/southern
IL...east-central MO
Concerning...Tornado and Severe Thunderstorm Watches
160...162...163...165...
Valid 280108Z - 280245Z
The severe weather threat for Tornado and Severe Thunderstorm
Watches 160, 162, 163, 165 continues.
SUMMARY...Damaging wind threat increasing as a organized QLCS
advances eastward through the evening. Some QLCS tornado risk may
continue across parts of central/southern IL into east-central MO.
DISCUSSION...A well-developed QLCS extending from west-central IN
through central IL into east-central MO will continue eastward
through the evening. As this line has become better organized as it
moves into an axis of moderate to strong instability overlapping a
40+ kt low level jet, swaths of damaging winds will be possible.
Additionally, low-level shear remains favorable (0-1 km SRH greater
than 300 m2/s2) for tornadoes and a few QLCS mesovortex tornadoes
will also be possible. New watch issuance or local extension of
existing tornado watches will likely be needed soon.
..Leitman.. 04/28/2026
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...IND...PAH...ILX...LSX...SGF...
LAT...LON 39898874 40458762 40438704 40288675 39978665 39638668
38938720 38338789 37728897 37389007 37499079 37709128
38109089 39898874
MOST PROBABLE PEAK TORNADO INTENSITY...120-145 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN
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