ACUS11 KWNS 061040
SWOMCD
SPC MCD 061039=20
OHZ000-INZ000-ILZ000-061245-

Mesoscale Discussion 0997
NWS Storm Prediction Center Norman OK
0539 AM CDT Sat Jun 06 2026

Areas affected...East-central Illinois into west-central Ohio

Concerning...Severe potential...Watch unlikely=20

Valid 061039Z - 061245Z

Probability of Watch Issuance...20 percent

SUMMARY...Isolated large hail and damaging winds are possible with a
marginally organized cluster of storms. Surface heating will be
needed for a greater severe threat. A watch is not anticipated in
the short term.

DISCUSSION...A small cluster of thunderstorms has recently
intensified in east-central Illinois. This activity is tied to the
shortwave trough currently moving into the lower Great Lakes region.
Regional VAD data shows around 35-40 kt of 0-6 km shear. With
sufficient elevated buoyancy (1000-1500 J/kg MUCAPE), some storm
organization can be expected. Dewpoints do decrease to the the east
of the this cluster, however. The environment will support isolated
large hail and strong/damaging wind gusts. A couple of recent
measured gusts were near severe (54-57 mph) in Pontiac, IL. It
likely will be after daybreak before these storms can intensify
further. That said, a watch is not anticipated in the near term.
Observational trends will need to be monitored as surface heating
increases in the coming hours.

..Wendt/Hart.. 06/06/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-CXVTIGKoWV5kOQuTkpXEEUPH7pDmayB8wmBL_lPuc13_ta3_dcvtAtMard9ICMHXo4PGfT7J= pwky1cGkhGL_wtpbD4$ for graphic product...

ATTN...WFO...CLE...ILN...IWX...IND...LOT...ILX...

LAT...LON 40048855 40408899 40888913 41258901 41478789 41328600
41048416 40918377 40208379 39528446 39588642 40048855=20

MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN


=3D =3D =3D
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