ACUS11 KWNS 061040

SWOMCD

SPC MCD 061039 

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 



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 www.spc.noaa.gov 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 



MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH

MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN