ACUS11 KWNS 181851
SWOMCD
SPC MCD 181850 
OHZ000-MIZ000-INZ000-182015-

Mesoscale Discussion 0772
NWS Storm Prediction Center Norman OK
0150 PM CDT Mon May 18 2026

Areas affected...Western Indiana into Eastern Ohio

Concerning...Severe Thunderstorm Watch 220...

Valid 181850Z - 182015Z

The severe weather threat for Severe Thunderstorm Watch 220
continues.

SUMMARY...Severe thunderstorms persist and are progressing eastward
across WW 220. They will continue to be capable of primarily
damaging wind gusts. Conditions are being monitored for a new WW
issued east of WW 220.

DISCUSSION...A line of severe thunderstorms continues to progress
across WW 220. Though the expectation is that the line should begin
to weaken with eastward extent, it will still be capable of damaging
wind gusts of 55-70 MPH within WW 220. Conditions will continue to
be monitored for a new WW eastward into Ohio, though uncertainty
exists in the convective longevity. Though the instability generally
decreases with eastward extent, the well-established cold-pool could
aid in persisting convection further east than the current WW 220
boundary.

..Halbert.. 05/18/2026

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

ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND...

LAT...LON   39398604 39398620 39498680 39738654 40458605 40828578
            41118562 41508561 42008568 42098551 42058498 42028458
            41858403 41688362 41368311 40938303 40348321 39768352
            39358400 39208437 39238519 39278552 39398604 

MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN