Alert archive / Illinois / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 298, NWS Lincoln, IL

June 17, 20264 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 17, 2026, 10:39 PM CDT for 4 counties in Illinois. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 17, 2026, 10:39 PM CDT (03:39 UTC)
Expired: Jun 17, 2026, 11:21 PM CDT
In force: 42 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Clay County, IL, Effingham County, IL, Jasper County, IL, Richland County, IL

The radar

The Evansville,IN radar (KVWX), 87 km from the middle of the area, began a volume at 03:39 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 17, 2:14 PM CDT	Tornado Watch	SPC	11 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.7 hours before the alert went out and 143 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: 611 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 895 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 10:35 PM CDT, 4 minutes earlier.

Area forecast discussion, Jun 17, 10:35 PM CDT, 4 minutes before

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Hazardous weather outlook, Jun 17, 3:28 PM CDT, 7 hours 11 minutes before

Hazardous Weather Outlook
National Weather Service Lincoln IL
328 PM CDT Wed Jun 17 2026

ILZ036>038-040>057-061>063-066>068-071>073-181100-
Fulton-Tazewell-McLean-Schuyler-Mason-Logan-De Witt-Piatt-Champaign-
Vermilion-Cass-Menard-Scott-Morgan-Sangamon-Christian-Macon-Moultrie-
Douglas-Coles-Edgar-Shelby-Cumberland-Clark-Effingham-Jasper-
Crawford-Clay-Richland-Lawrence-
328 PM CDT Wed Jun 17 2026

This Hazardous Weather Outlook is for central Illinois, east
central Illinois, southeast Illinois and west central Illinois.

.DAY ONE...Tonight.

A broken line of thunderstorms capable of all severe hazards will
settle southward through central Illinois late this afternoon and
evening. The strongest cells within the line will have the potential
to produce tornadoes, damaging wind gusts in excess of 70mph, and hail
large than golf balls. The highest probability for strong tornadoes
will focus along and south of a Springfield to Paris line.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will develop across the area late Saturday night into
Sunday. At this time it appears the severe weather risk will remain
low.

River flooding is ongoing for portions of central Illinois. Please
refer to the latest flood statements for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed through 10pm this evening.

Expected storm motion is toward the east at 60-70mph.

ILZ027>031-181100-
Knox-Stark-Peoria-Marshall-Woodford-
328 PM CDT Wed Jun 17 2026

This Hazardous Weather Outlook is for central Illinois and west
central Illinois.

.DAY ONE...Tonight.

A few strong to severe thunderstorms capable of damaging wind gusts
and large hail will track across north-central Illinois late this
afternoon. The storms will drop south of the Peoria area by early
evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will develop across the area late Saturday night into
Sunday. At this time it appears the severe weather risk will remain
low.

River flooding is ongoing for portions of central Illinois. Please
refer to the latest flood statements for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed through 5pm this afternoon.

Expected storm motion is toward the east at 60-70mph.

Barnes

In the hours before

Local storm report, Jun 17, 9:26 PM CDT, 1 hour 13 minutes before

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Local storm report, Jun 17, 9:29 PM CDT, 1 hour 10 minutes before

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Local storm report, Jun 17, 10:14 PM CDT, 25 minutes before

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Local storm report, Jun 17, 10:34 PM CDT, 5 minutes before

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Local storm report, Jun 17, 10:36 PM CDT, 3 minutes before

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Local storm report, Jun 17, 10:38 PM CDT, 1 minute before

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The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 17, 7:07 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	ILX	Clark, Coles, Edgar	53 min
Jun 17, 7:08 PM CDT	Severe Thunderstorm Warning	ILX	Macon, Moultrie, Piatt	32 min
Jun 17, 7:14 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Douglas, Moultrie, Shelby	49 min
Jun 17, 7:21 PM CDT	Tornado Warning	ILX	Christian, Shelby	22 min
Jun 17, 7:36 PM CDT	Severe Thunderstorm Warning	ILX	Effingham, Shelby	39 min
Jun 17, 7:45 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Edgar	45 min
Jun 17, 7:49 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Clark, Coles, Crawford, Cumberland, Effingham, Jasper	56 min
Jun 17, 7:51 PM CDT	Tornado Warning	ILX	Cumberland, Effingham, Jasper, Shelby	39 min
Jun 17, 8:14 PM CDT	Tornado Warning	ILX	Clark	12 min
Jun 17, 8:21 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	ILX	Cumberland, Jasper	39 min
Jun 17, 8:38 PM CDT	Tornado Warning	ILX	Clark, Crawford	52 min
Jun 17, 8:54 PM CDT	Tornado Warning	ILX	Effingham	51 min
Jun 17, 8:56 PM CDT	River Flood Warning	ILX	Piatt	7 days
Jun 17, 9:12 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Douglas, Edgar	48 min
Jun 17, 9:27 PM CDT	Severe Thunderstorm Warning	ILX	Jasper	23 min
Jun 17, 10:02 PM CDT	Areal Flood Advisory	ILX	Macon, Moultrie	9 hr
Jun 17, 10:14 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham	27 min
Jun 17, 10:35 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Cumberland, Jasper	28 min
Jun 17, 11:38 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	39 min
Jun 18, 2:47 AM CDT	River Flood Warning	ILX	Fulton, Knox	18 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2026 Every severe thunderstorm warning 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.