ACUS11 KWNS 102335
SWOMCD
SPC MCD 102335=20
INZ000-ILZ000-110030-

Mesoscale Discussion 1077
NWS Storm Prediction Center Norman OK
0635 PM CDT Wed Jun 10 2026

Areas affected...portions of northern Illinois

Concerning...Severe potential...Watch needed soon=20

Valid 102335Z - 110030Z

Probability of Watch Issuance...95 percent

SUMMARY...Storms approaching from the west will likely continue with
a risk for damaging gusts and a tornado or two this evening. A new
WW is likely needed shortly.

DISCUSSION...In the wake of earlier convection, rapid air mass
recovery is ongoing ahead of a convective line across the IA/IL
border. This line remains strong with a recent measured severe gust
to 60 kt at DVN. While buoyancy will be more limited (1000-2000
J/kg), it should remain sufficient for a damaging wind risk this
evening. A QLCS tornado or two is also possible given the strong
low-level shear over much of northern IL. A new WW will be needed
shortly for the expected severe threat.

..Lyons/Smith.. 06/10/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-1_lIxkdt44-Fbt5qavE_oddwdCqK2U2dsFICnWeYpwoh4VFk_NulCzOcg9rKV-Rhu-HcJwj0= RKVC7RWsWaI9txx-Qg$ for graphic product...

ATTN...WFO...IND...LOT...ILX...LSX...DVN...

LAT...LON 41488998 41958963 41918901 41828882 41688855 40958777
40578750 40108754 39648790 39618846 39558950 39599016
39589047 39869053 39979051 40419039 41069002 41488998=20

MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


=3D =3D =3D
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