Alert archive / Indiana / Mesoscale Discussions in 2026

Mesoscale Discussion 739

May 16, 20265 counties in Illinois; 7 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at May 16, 2026, 5:10 PM CDT for 5 counties in Illinois; 7 counties in Indiana. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: May 16, 2026, 5:10 PM CDT (22:10 UTC)
Expired: May 16, 2026, 6:15 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 208

Counties Clay County, IL, Edwards County, IL, Richland County, IL, Wabash County, IL, Wayne County, IL, Crawford County, IN, Dubois County, IN, Gibson County, IN, Perry County, IN, Pike County, IN, Spencer County, IN, Warrick County, IN

The radar

The Evansville,IN radar (KVWX), 26 km from the middle of the area, began a volume at 22:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.2 hours before the alert went out and 229 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 351 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1001 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -79 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 15, 9:07 PM CDT	Mesoscale Discussion	SPC	Boone, Carroll, Jo Daviess, Ogle, Stephenson, Winnebago	113 min
May 15, 10:33 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Carroll, Jo Daviess, McHenry, Ogle, Stephenson and 1 more	4 hr
May 16, 12:29 AM CDT	Mesoscale Discussion	SPC	Boone, McHenry, Stephenson, Winnebago	91 min
May 16, 2:13 PM CDT	Mesoscale Discussion	SPC	Edwards, Franklin, Gallatin, Hamilton, Hardin, Jefferson and 10 more	2 hr
May 16, 3:46 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Clark, Clay, Clinton, Crawford, Cumberland and 15 more	4 hr

Nearby

Mesoscale Discussions in Indiana, 2026 Mesoscale Discussions in Illinois, 2026 Every mesoscale discussion in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.