Alert archive / Iowa / Tornado Watches in 2026

Tornado Watch 305

June 10, 202612 counties in Illinois; 17 counties in Iowa; 11 counties in Missouri

The Storm Prediction Center issued this tornado watch at Jun 10, 2026, 4:01 PM CDT for 12 counties in Illinois; 17 counties in Iowa; 11 counties in Missouri. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 10, 2026, 4:01 PM CDT (21:01 UTC)
Expired: Jun 10, 2026, 11:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 65 kt

All 40 counties

Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Adams County, IL, Brown County, IL, Calhoun County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Pike County, IL, Rock Island County, IL, Warren County, IL, Whiteside County, IL, Audrain County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Scotland County, MO, Shelby County, MO

The radar

The Quad Cities radar (KDVN), 102 km from the middle of the area, began a volume at 21:04 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: 50%
One or more EF2 to EF5 tornadoes: 30%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 10, 5:19 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Louisa, Muscatine, Washington	56 min
Jun 10, 5:30 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Johnson, Muscatine, Scott, Washington	60 min
Jun 10, 5:37 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Van Buren	68 min
Jun 10, 5:41 PM CDT	Tornado Warning	DVN	Van Buren	52 min
Jun 10, 5:53 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Mercer, Rock Island	52 min
Jun 10, 6:03 PM CDT	Tornado Warning	DVN	Henry, Rock Island	33 min
Jun 10, 6:17 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Bureau, Henry, Rock Island, Whiteside	58 min
Jun 10, 6:23 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	Rock Island, Whiteside	52 min
Jun 10, 6:41 PM CDT	Tornado Warning	DVN	Bureau, Henry, Whiteside	49 min
Jun 10, 6:42 PM CDT	Tornado Warning	LSX	Knox	49 min
Jun 10, 7:17 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	58 min
Jun 10, 7:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Bureau, Henry, Putnam	55 min
Jun 10, 7:20 PM CDT	Severe Thunderstorm Warning	LSX	Lewis	55 min
Jun 10, 7:30 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	75 min
Jun 10, 7:57 PM CDT	Severe Thunderstorm Warning	LSX	Adams	48 min
Jun 10, 8:19 PM CDT	Flash Flood Warning	DVN	Hancock	5 hr
Jun 10, 8:19 PM CDT	Flash Flood Warning	LSX	Knox, Lewis	5 hr
Jun 10, 8:49 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough, Warren	56 min
Jun 10, 9:26 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	34 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, 9.0 hours before the alert went out and 226 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: 1372 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1070 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: -58 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 9, 7:05 PM CDT	Mesoscale Discussion	SPC	Clark	115 min
Jun 10, 7:43 AM CDT	Mesoscale Discussion	SPC	Henderson	2 hr
Jun 10, 11:09 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Carroll, Fulton, Hancock, Henderson and 13 more	2 hr
Jun 10, 12:00 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Bureau, Carroll, DeKalb, Henry, Jo Daviess and 9 more	9 hr
Jun 10, 1:00 PM CDT	Mesoscale Discussion	SPC	Boone, Carroll, Jo Daviess, Lee, McHenry, Ogle and 3 more	2 hr
Jun 10, 2:06 PM CDT	Mesoscale Discussion	SPC	Bureau, Cass, Champaign, Christian, Cook, DeKalb and 35 more	54 min
Jun 10, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	Cass, Champaign, Christian, Coles, Cook, DeWitt and 28 more	4 hr
Jun 10, 3:58 PM CDT	Mesoscale Discussion	SPC	Cook, Ford, Grundy, Iroquois, Kankakee, Lake and 2 more	2 hr
Jun 10, 6:35 PM CDT	Mesoscale Discussion	SPC	Bureau, Cass, Champaign, DeWitt, Douglas, Ford and 23 more	55 min
Jun 9, 7:59 PM CDT	Mesoscale Discussion	SPC	Harrison, Monona	91 min
Jun 9, 8:36 PM CDT	Tornado Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more	5 hr
Jun 10, 1:35 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Cass and 24 more	2 hr
Jun 10, 2:12 PM CDT	Tornado Watch	SPC	Adams, Appanoose, Clarke, Davis, Decatur, Lucas and 8 more	9 hr
Jun 10, 2:39 PM CDT	Mesoscale Discussion	SPC	Butler, Calhoun, Carroll, Cerro Gordo, Emmet, Floyd and 14 more	2 hr
Jun 10, 3:50 PM CDT	Mesoscale Discussion	SPC	Appanoose, Decatur, Lucas, Monroe, Wayne	85 min
Jun 10, 4:27 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Decatur, Van Buren, Wayne	63 min
Jun 10, 5:47 PM CDT	Mesoscale Discussion	SPC	Allamakee, Howard, Winneshiek	88 min
Jun 10, 5:57 PM CDT	Mesoscale Discussion	SPC	Adams, Fremont, Montgomery, Page, Ringgold, Taylor and 1 more	93 min

Nearby

Tornado Watches in Iowa, 2026 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.