Alert archive / Illinois / Tornado Watches in 2026

Tornado Watch 342

June 17, 202651 counties in Illinois; 24 counties in Missouri

The Storm Prediction Center issued this tornado watch at Jun 17, 2026, 2:14 PM CDT for 51 counties in Illinois; 24 counties in Missouri. It was in force for 11 hr.

The area

The outline as issued.

The facts

Issued: Jun 17, 2026, 2:14 PM CDT (19:14 UTC)
Expired: Jun 18, 2026, 1:00 AM CDT
In force: 11 hr
Issued by: the Storm Prediction Center
Largest hail expected: 3 in
Strongest gust expected: 65 kt

All 75 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Iroquois County, IL, Jasper County, IL, Jersey County, IL, Lawrence County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Pike County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Clark County, MO, Cole County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Scotland County, MO, Shelby County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 103 km from the middle of the area, began a volume at 19:17 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 80%
One or more EF2 to EF5 tornadoes: 70%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 60%
Ten or more severe hail reports: 70%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

68 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 17, 2:53 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Fulton, Logan, McLean, Mason, Tazewell	50 min
Jun 17, 2:55 PM CDT	Severe Thunderstorm Warning	ILX	McLean, Peoria, Tazewell, Woodford	31 min
Jun 17, 3:29 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	61 min
Jun 17, 3:41 PM CDT	Flash Flood Warning	ILX	DeWitt, Logan, McLean, Tazewell	3 hr
Jun 17, 3:42 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, McLean, Macon, Piatt	41 min
Jun 17, 3:50 PM CDT	Flash Flood Warning	ILX	McLean, Peoria, Tazewell, Woodford	3 hr
Jun 17, 3:50 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Logan, Mason, Menard, Sangamon	55 min
Jun 17, 3:52 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, McLean, Mason, Tazewell	26 min
Jun 17, 3:57 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Christian, Logan, Mason, Menard, Sangamon	63 min
Jun 17, 4:07 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe	38 min
Jun 17, 4:08 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	23 min
Jun 17, 4:08 PM CDT	Tornado Warning	ILX	Champaign, DeWitt, Douglas, Macon, Piatt	31 min
Jun 17, 4:14 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Mason, Tazewell	28 min
Jun 17, 4:19 PM CDT	Flash Flood Warning	ILX	Champaign, DeWitt, McLean, Piatt	3 hr
Jun 17, 4:19 PM CDT	Tornado Warning	ILX	Logan, Menard, Sangamon	41 min
Jun 17, 4:23 PM CDT	Tornado Warning	ILX	DeWitt, Logan, Macon	52 min
Jun 17, 4:28 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	47 min
Jun 17, 4:29 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Fulton, Mason, Schuyler	61 min
Jun 17, 4:31 PM CDT	Tornado Warning	LSX	Audrain, Monroe	44 min
Jun 17, 4:33 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	19 min
Jun 17, 4:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Christian, Logan, Menard, Sangamon	19 min
Jun 17, 4:49 PM CDT	Severe Thunderstorm Warning	ILX	Christian, DeWitt, Macon, Moultrie, Piatt, Sangamon and 1 more	56 min
Jun 17, 4:54 PM CDT	Tornado Warning	ILX	Christian, Macon	38 min
Jun 17, 4:56 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	49 min
Jun 17, 5:05 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Menard, Sangamon	40 min
Jun 17, 5:06 PM CDT	Tornado Warning	LSX	Adams, Brown, Pike	39 min
Jun 17, 5:10 PM CDT	Tornado Warning	LSX	Audrain, Pike, Ralls	18 min
Jun 17, 5:11 PM CDT	Tornado Warning	ILX	Christian, Macon, Moultrie, Shelby	21 min
Jun 17, 5:14 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, Macon	26 min
Jun 17, 5:18 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Scott	38 min
Jun 17, 5:21 PM CDT	Tornado Warning	ILX	Champaign, Douglas, Piatt	39 min
Jun 17, 5:23 PM CDT	Tornado Warning	ILX	Macon, Moultrie, Piatt, Shelby	30 min
Jun 17, 5:26 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Mason, Menard, Sangamon	34 min
Jun 17, 5:43 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Logan, Macon, Moultrie, Piatt, Sangamon and 1 more	44 min
Jun 17, 5:46 PM CDT	Tornado Warning	ILX	Coles, Douglas	44 min
Jun 17, 5:50 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	21 min
Jun 17, 6:09 PM CDT	Tornado Warning	ILX	Clark, Edgar	53 min
Jun 17, 6:11 PM CDT	Flash Flood Warning	ILX	Christian, Logan, Macon, Menard, Moultrie, Sangamon	4 hr
Jun 17, 6:16 PM CDT	Flash Flood Warning	ILX	Champaign, Piatt, Vermilion	4 hr
Jun 17, 6:18 PM CDT	Severe Thunderstorm Warning Destructive damage threat	ILX	Coles, Douglas, Moultrie, Piatt	42 min
Jun 17, 6:33 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Sangamon, Scott	45 min
Jun 17, 6:40 PM CDT	Flash Flood Warning	ILX	Clark, Coles, Douglas, Edgar	3 hr
Jun 17, 6:44 PM CDT	Severe Thunderstorm Warning Destructive damage threat	ILX	Coles, Cumberland, Douglas	46 min
Jun 17, 6:46 PM CDT	Tornado Warning	ILX	Coles, Cumberland	29 min
Jun 17, 6:47 PM CDT	Tornado Warning	ILX	Christian, Sangamon	43 min
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, 7:49 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	15 min
Jun 17, 7:51 PM CDT	Tornado Warning	ILX	Cumberland, Effingham, Jasper, Shelby	39 min
Jun 17, 7:53 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	42 min
Jun 17, 8:09 PM CDT	Tornado Warning	LSX	Fayette, Montgomery	41 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, 8:39 PM CDT	Tornado Warning	LSX	Fayette	26 min
Jun 17, 8:54 PM CDT	Tornado Warning	ILX	Effingham	51 min
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, 10:13 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	17 min
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, 10:39 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper, Richland	42 min
Jun 17, 11:38 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	39 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.2 hours before the alert went out and 175 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2139 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 17, 3:55 AM CDT	Severe Thunderstorm Watch	SPC	Carroll, Henderson, Henry, Jo Daviess, Mercer, Rock Island and 2 more	7 hr
Jun 17, 5:42 AM CDT	Mesoscale Discussion	SPC	Carroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 3 more	2 hr
Jun 17, 7:49 AM CDT	Tornado Watch	SPC	Adams, Brown, Bureau, Calhoun, Cass, Champaign and 40 more	6 hr
Jun 17, 8:16 AM CDT	Mesoscale Discussion	SPC	Brown, Bureau, Cass, Champaign, Christian, Clark and 37 more	59 min
Jun 17, 10:43 AM CDT	Mesoscale Discussion	SPC	Bond, Champaign, Christian, Clark, Coles, Crawford and 19 more	2 hr
Jun 17, 1:03 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Champaign, Christian and 24 more	117 min
Jun 17, 4:00 PM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Champaign and 37 more	60 min
Jun 17, 6:50 PM CDT	Mesoscale Discussion	SPC	Christian, Clark, Coles, Crawford, Cumberland, Montgomery and 2 more	115 min
Jun 17, 2:36 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Barton, Bates, Benton, Caldwell, Camden and 35 more	7 hr
Jun 17, 5:23 PM CDT	Tornado Watch	SPC	Bates, Benton, Camden, Cedar, Cooper, Dallas and 12 more	5 hr
Jun 17, 5:43 PM CDT	Mesoscale Discussion	SPC	Bates, Benton, Cedar, Cooper, Henry, Hickory and 8 more	62 min

Nearby

Tornado Watches in Illinois, 2026 Tornado Watches in Missouri, 2026 Every tornado watch 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.