Alert archive / Iowa / Tornado Watches in 2024

Tornado Watch 446

June 22, 20245 counties in Illinois; 27 counties in Iowa; 19 counties in Wisconsin

The Storm Prediction Center issued this tornado watch at Jun 22, 2024, 3:13 PM CDT for 5 counties in Illinois; 27 counties in Iowa; 19 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 22, 2024, 3:13 PM CDT (20:13 UTC)
Expired: Jun 22, 2024, 9:28 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 51 counties

Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hardin County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Marshall County, IA, Muscatine County, IA, Scott County, IA, Tama County, IA, Winneshiek County, IA, Carroll County, IL, Jo Daviess County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The La Crosse radar (KARX), 124 km from the middle of the area, began a volume at 20:15 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: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 22, 3:53 PM CDT	Tornado Warning	DVN	Buchanan, Delaware	29 min
Jun 22, 4:38 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Winneshiek	67 min
Jun 22, 4:40 PM CDT	Tornado Warning	DMX	Black Hawk, Bremer	35 min
Jun 22, 5:12 PM CDT	Tornado Warning	DVN	Dubuque	18 min
Jun 22, 5:15 PM CDT	Tornado Warning	ARX	Grant	45 min
Jun 22, 5:19 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	56 min
Jun 22, 5:22 PM CDT	Tornado Warning	DVN	Buchanan, Delaware	53 min
Jun 22, 5:23 PM CDT	Tornado Warning	ARX	Clayton, Fayette	52 min
Jun 22, 5:39 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	51 min
Jun 22, 5:44 PM CDT	Tornado Warning Tornado observed	MKX	Lafayette	46 min
Jun 22, 5:48 PM CDT	Tornado Warning	ARX	Crawford, Grant, Richland	42 min
Jun 22, 5:51 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Iowa, Sauk	39 min
Jun 22, 5:55 PM CDT	Tornado Warning	MKX	Dane, Iowa, Sauk	35 min
Jun 22, 6:03 PM CDT	Tornado Warning	DVN	Delaware, Dubuque	57 min
Jun 22, 6:04 PM CDT	Flash Flood Warning	MKX	Sauk	3 hr
Jun 22, 6:12 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane	48 min
Jun 22, 6:17 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Sauk	43 min
Jun 22, 6:22 PM CDT	Flash Flood Warning	ARX	Allamakee	3 hr
Jun 22, 6:22 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Lafayette	38 min
Jun 22, 6:30 PM CDT	Tornado Warning	MKX	Columbia, Dane	30 min
Jun 22, 6:31 PM CDT	Flash Flood Warning	MKX	Columbia, Dane, Sauk	3 hr
Jun 22, 6:33 PM CDT	Tornado Warning	MKX	Green, Lafayette	42 min
Jun 22, 6:47 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Dodge, Jefferson	43 min
Jun 22, 6:53 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Iowa, Jefferson, Lafayette, Rock	52 min
Jun 22, 6:56 PM CDT	Tornado Warning	ARX	Grant	19 min
Jun 22, 6:56 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	49 min
Jun 22, 7:00 PM CDT	Tornado Warning	MKX	Columbia, Dane	30 min
Jun 22, 7:04 PM CDT	Tornado Warning	MKX	Green	13 min
Jun 22, 7:05 PM CDT	Flash Flood Warning	MKX	Columbia, Dane	3 hr
Jun 22, 7:08 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	37 min
Jun 22, 7:09 PM CDT	Tornado Warning	MKX	Dane, Dodge, Jefferson	36 min
Jun 22, 7:24 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock, Walworth	51 min
Jun 22, 7:27 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Dodge, Jefferson	48 min
Jun 22, 7:29 PM CDT	Tornado Warning	MKX	Dodge, Jefferson	31 min
Jun 22, 7:33 PM CDT	Severe Thunderstorm Warning	MKX	Green, Lafayette	42 min
Jun 22, 7:40 PM CDT	Flash Flood Warning	MKX	Columbia, Dane, Dodge, Jefferson	3 hr
Jun 22, 7:42 PM CDT	Tornado Warning	MKX	Rock	33 min
Jun 22, 7:52 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Jefferson, Washington, Waukesha	53 min
Jun 22, 7:55 PM CDT	Severe Thunderstorm Warning	MKX	Rock	20 min
Jun 22, 8:01 PM CDT	Flash Flood Warning	MKX	Rock	3 hr
Jun 22, 8:02 PM CDT	Severe Thunderstorm Warning	MKX	Walworth	43 min
Jun 22, 8:06 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	39 min
Jun 22, 8:06 PM CDT	Tornado Warning	MKX	Walworth	39 min
Jun 22, 8:12 PM CDT	Severe Thunderstorm Warning	ARX	Grant	18 min
Jun 22, 8:18 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	60 min
Jun 22, 8:18 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee, Washington, Waukesha	41 min
Jun 22, 8:22 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	37 min
Jun 22, 8:29 PM CDT	Tornado Warning	MKX	Kenosha, Walworth	46 min
Jun 22, 8:37 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess, Stephenson	53 min
Jun 22, 8:59 PM CDT	Tornado Warning	MKX	Kenosha	16 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

Davenport, (KDVN), launched 12:00Z, 8.2 hours before the alert went out and 152 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: 296 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1215 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 22, 12:56 PM CDT	Mesoscale Discussion	SPC	Boone, Carroll, Jo Daviess, Ogle, Stephenson, Whiteside and 1 more	2 hr
Jun 22, 5:25 PM CDT	Mesoscale Discussion	SPC	Jo Daviess	95 min
Jun 22, 6:55 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, DeKalb, DuPage, Fulton, Grundy and 16 more	2 hr
Jun 21, 8:25 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 8 more	95 min
Jun 21, 10:38 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 14 more	67 min
Jun 22, 5:46 PM CDT	Mesoscale Discussion	SPC	Appanoose, Clarke, Davis, Decatur, Jasper, Jefferson and 11 more	119 min

Nearby

Tornado Watches in Iowa, 2024 Tornado Watches in Wisconsin, 2024 Tornado Watches in Illinois, 2024 Every tornado watch in 2024

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.