Alert archive / Iowa / Tornado Watches in 2024

Tornado Watch 497

July 2, 202410 counties in Illinois; 42 counties in Iowa; 11 counties in Missouri

The Storm Prediction Center issued this tornado watch at Jul 2, 2024, 3:14 PM CDT for 10 counties in Illinois; 42 counties in Iowa; 11 counties in Missouri. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jul 2, 2024, 3:14 PM CDT (20:14 UTC)
Expired: Jul 2, 2024, 10:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 63 counties

Adair County, IA, Appanoose County, IA, Benton County, IA, Boone County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Guthrie County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Story County, IA, Tama County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Whiteside County, IL, Adair County, MO, Clark County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 96 km from the middle of the area, began a volume at 20:17 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: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 70%
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

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

Issued	Product	Office	Counties	Lasted
Jul 2, 3:41 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Warren	49 min
Jul 2, 4:08 PM CDT	Flash Flood Warning	DMX	Madison, Warren	4 hr
Jul 2, 4:09 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Monroe, Wayne	51 min
Jul 2, 4:15 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	60 min
Jul 2, 4:28 PM CDT	Flash Flood Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	4 hr
Jul 2, 4:28 PM CDT	Severe Thunderstorm Warning	EAX	Gentry, Harrison, Mercer	62 min
Jul 2, 4:45 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, DeKalb, Gentry	30 min
Jul 2, 4:47 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Monroe, Wapello	43 min
Jul 2, 4:48 PM CDT	Tornado Warning	DMX	Mahaska, Poweshiek	27 min
Jul 2, 4:50 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Iowa, Keokuk, Washington	40 min
Jul 2, 4:52 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Monroe, Wayne	38 min
Jul 2, 4:52 PM CDT	Tornado Warning	DVN	Iowa, Keokuk, Washington	38 min
Jul 2, 4:55 PM CDT	Tornado Warning	DMX	Mahaska, Monroe, Wapello	17 min
Jul 2, 4:58 PM CDT	Tornado Warning	DMX	Appanoose	47 min
Jul 2, 5:06 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk, Washington	54 min
Jul 2, 5:10 PM CDT	Severe Thunderstorm Warning	EAX	Gentry, Harrison	35 min
Jul 2, 5:21 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Wapello	39 min
Jul 2, 5:22 PM CDT	Severe Thunderstorm Warning	EAX	Harrison, Mercer, Putnam, Sullivan	53 min
Jul 2, 5:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Iowa, Johnson, Keokuk, Louisa, Washington	49 min
Jul 2, 5:36 PM CDT	Flash Flood Warning	DMX	Mahaska, Poweshiek	3 hr
Jul 2, 5:48 PM CDT	Tornado Warning	DVN	Cedar, Iowa, Johnson, Muscatine, Washington	42 min
Jul 2, 5:49 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Louisa, Van Buren, Washington	56 min
Jul 2, 5:52 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Putnam, Schuyler, Sullivan	53 min
Jul 2, 5:57 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	Cedar, Johnson, Muscatine, Washington	18 min
Jul 2, 6:04 PM CDT	Flash Flood Warning	DVN	Iowa, Johnson, Keokuk, Washington	4 hr
Jul 2, 6:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Rock Island	47 min
Jul 2, 6:16 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, DeKalb, Gentry, Grundy, Harrison	44 min
Jul 2, 6:21 PM CDT	Tornado Warning	DVN	Cedar, Clinton, Johnson, Muscatine, Scott	54 min
Jul 2, 6:24 PM CDT	Tornado Warning	DVN	Delaware, Dubuque, Jackson, Jones	51 min
Jul 2, 6:24 PM CDT	Severe Thunderstorm Warning	EAX	Grundy, Sullivan	21 min
Jul 2, 6:26 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jackson, Jones	49 min
Jul 2, 6:30 PM CDT	Severe Thunderstorm Warning	DVN	Mercer, Rock Island	45 min
Jul 2, 6:31 PM CDT	Flash Flood Warning	DVN	Cedar, Johnson	3 hr
Jul 2, 6:35 PM CDT	Flash Flood Warning	DVN	Keokuk	3 hr
Jul 2, 6:43 PM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Clinton, Daviess, Grundy, Livingston	47 min
Jul 2, 6:44 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Henry, Rock Island, Whiteside	46 min
Jul 2, 6:45 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Grundy, Putnam, Schuyler, Sullivan	60 min
Jul 2, 6:51 PM CDT	Flash Flood Warning	DVN	Johnson, Keokuk, Louisa, Washington	3 hr
Jul 2, 7:04 PM CDT	Severe Thunderstorm Warning	DVN	Henderson, Henry, Mercer, Rock Island, Warren	41 min
Jul 2, 7:11 PM CDT	Flash Flood Warning	DVN	Jo Daviess	3 hr
Jul 2, 7:18 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Jo Daviess, Rock Island, Whiteside	29 min
Jul 2, 7:18 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Caldwell, Chariton, Grundy, Linn, Livingston and 1 more	42 min
Jul 2, 7:42 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Linn, Livingston, Macon, Putnam, Schuyler and 1 more	63 min
Jul 2, 8:00 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Henry, Mercer	45 min
Jul 2, 8:12 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Linn, Macon	78 min
Jul 2, 8:19 PM CDT	Flash Flood Warning	EAX	Adair, Caldwell, Carroll, Daviess, Grundy, Linn and 7 more	6 hr
Jul 2, 8:30 PM CDT	Severe Thunderstorm Warning	DVN	Lee	45 min
Jul 2, 8:55 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	50 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 177 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: 1514 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 468 m²/s²
0-3 km storm-relative helicity: 487 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 2, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	Adams	7 hr
Jul 2, 5:13 PM CDT	Mesoscale Discussion	SPC	Carroll, Hancock, Henderson, Henry, Mercer, Rock Island and 2 more	92 min
Jul 2, 6:09 PM CDT	Mesoscale Discussion	SPC	Rock Island	66 min
Jul 2, 6:27 PM CDT	Mesoscale Discussion	SPC	Boone, Brown, Bureau, Cass, DeKalb, Fulton and 13 more	2 hr
Jul 2, 2:24 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Benton, Clarke, Davis and 26 more	2 hr

Nearby

Tornado Watches in Iowa, 2024 Tornado Watches in Missouri, 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.