Alert archive / Iowa / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 80, NWS Quad Cities, IA

July 11, 20254 counties in Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 11, 2025, 11:27 AM CDT for 4 counties in Iowa. It was in force for 37 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: Jul 11, 2025, 11:27 AM CDT (16:27 UTC)
Expired: Jul 11, 2025, 12:04 PM CDT
In force: 37 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Benton County, IA, Buchanan County, IA, Delaware County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 120 km from the middle of the area, began a volume at 16:30 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 nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 4.5 hours before the alert went out and 124 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: 100 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -53 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 6:34 AM CDT, 4 hours 53 minutes earlier.

Area forecast discussion, Jul 11, 6:34 AM CDT, 4 hours 53 minutes before

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Hazardous weather outlook, Jul 11, 4:05 AM CDT, 7 hours 22 minutes before

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In the hours before

Local storm report, Jul 11, 6:47 AM CDT, 4 hours 40 minutes before

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Local storm report, Jul 11, 8:30 AM CDT, 2 hours 57 minutes before

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Local storm report, Jul 11, 8:31 AM CDT, 2 hours 56 minutes before

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Local storm report, Jul 11, 8:33 AM CDT, 2 hours 54 minutes before

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Local storm report, Jul 11, 10:24 AM CDT, 1 hour 3 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
1024 AM CDT Fri Jul 11 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1024 AM     Rain             2 W Genoa Bluff         41.72N 92.18W
07/11/2025  M1.50 Inch       Iowa               IA   Trained Spotter

            24 hr total ending at 7 AM.

&&

Special weather statement, Jul 11, 10:53 AM CDT, 34 minutes before

Special Weather Statement
National Weather Service Quad Cities IA/IL
1053 AM CDT Fri Jul 11 2025

IAZ040-041-051-052-111700-
Linn IA-Buchanan IA-Delaware IA-Benton IA-
1053 AM CDT Fri Jul 11 2025

...A slow-moving thunderstorm will impact portions of northwestern
Linn, Buchanan, northwestern Delaware and northern Benton Counties
through NOON CDT...

At 1052 AM CDT, Doppler radar was tracking a slow-moving thunderstorm
near Brandon, or 8 miles northeast of Vinton, moving northeast at 60
mph.

HAZARD...Minor flooding.

SOURCE...Radar indicated.

IMPACT...Slowing or redirecting of traffic due to ponding or flowing
         water. Closure of waterfront access due to flooding.

Locations impacted include...
Independence, Vinton, Manchester, Center Point, Urbana, Shellsburg,
Newhall, Edgewood, Winthrop, Walker, Quasqueton, Lamont, Garrison,
Brandon, Rowley, Greeley, Aurora, Dundee, Mount Auburn, and
Masonville.

This includes Interstate 380 between mile markers 35 and 55.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is occurring and may lead to localized flooding.
Do not drive your vehicle through flooded roadways. Stay away from
flooded areas. Report any flooding to local law enforcement.

If the heavy rain continues, a flash flood warning may be needed.

&&

LAT...LON 4197 9195 4216 9226 4230 9212 4230 9206
      4235 9207 4264 9176 4265 9123
TIME...MOT...LOC 1552Z 221DEG 53KT 4227 9195

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH

Gunkel

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 7:16 PM CDT	Severe Thunderstorm Warning	DVN	Jackson	44 min
Jul 10, 7:17 PM CDT	Flood Watch	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	30 hr
Jul 10, 7:42 PM CDT	Flash Flood Warning	DVN	Clinton, Jackson	4 hr
Jul 10, 7:56 PM CDT	Severe Thunderstorm Warning	DVN	Clinton	38 min
Jul 10, 9:15 PM CDT	Special Weather Statement	DVN	Scott	45 min
Jul 10, 9:42 PM CDT	Tornado Warning	DVN	Scott	18 min
Jul 10, 10:10 PM CDT	Flash Flood Warning	DVN	Scott	2 hr
Jul 10, 10:33 PM CDT	Flash Flood Warning Considerable damage threat	DVN	Scott	108 min
Jul 11, 1:48 AM CDT	Flash Flood Warning	DVN	Louisa, Washington	4 hr
Jul 11, 2:22 AM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa	53 min
Jul 11, 3:05 AM CDT	Severe Thunderstorm Warning	DVN	Cedar, Iowa, Johnson, Linn, Muscatine	33 min
Jul 11, 9:59 AM CDT	River Flood Watch	DVN	Clinton, Scott	3 days
Jul 11, 10:53 AM CDT	Special Weather Statement	DVN	Benton, Buchanan	67 min
Jul 11, 11:28 AM CDT	River Flood Watch	DVN	Des Moines	44 hr
Jul 11, 11:28 AM CDT	River Flood Watch	DVN	Des Moines, Lee	48 hr
Jul 11, 2:38 PM CDT	Tornado Warning	DVN	Jefferson, Keokuk, Washington	13 min
Jul 11, 2:54 PM CDT	Special Weather Statement	DVN	Benton, Buchanan, Delaware, Dubuque, Linn	96 min
Jul 11, 2:54 PM CDT	Tornado Warning	DVN	Henry, Jefferson, Van Buren	51 min
Jul 11, 2:58 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Washington	47 min
Jul 11, 3:03 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Linn	57 min
Jul 11, 3:09 PM CDT	Flash Flood Warning Considerable damage threat	DVN	Dubuque	4 hr
Jul 11, 3:44 PM CDT	Flash Flood Warning	DVN	Benton, Buchanan, Delaware, Linn	8 hr
Jul 11, 3:54 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Delaware, Dubuque, Jackson, Johnson and 2 more	66 min
Jul 11, 3:57 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Dubuque	63 min
Jul 11, 4:09 PM CDT	Tornado Warning	DVN	Delaware, Dubuque, Jackson, Jones, Linn	51 min
Jul 11, 4:15 PM CDT	Flash Flood Warning	DVN	Iowa, Johnson, Linn	4 hr
Jul 11, 4:16 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine	59 min
Jul 11, 4:22 PM CDT	Tornado Warning	DVN	Delaware, Dubuque, Jackson, Jones	38 min
Jul 11, 4:26 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	34 min
Jul 11, 4:33 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Dubuque, Jackson, Jones	57 min
Jul 11, 4:37 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	Dubuque, Jackson, Jones	38 min
Jul 11, 4:39 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Louisa	66 min
Jul 11, 4:40 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Delaware, Dubuque	29 min
Jul 11, 4:47 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	43 min
Jul 11, 4:52 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Jackson, Scott	53 min
Jul 11, 5:05 PM CDT	Tornado Warning	DVN	Muscatine, Scott	40 min
Jul 11, 5:26 PM CDT	Flash Flood Warning EmergencyConsiderable damage threat	DVN	Scott	10 hr
Jul 11, 5:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Scott	64 min
Jul 11, 5:39 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Jackson, Scott	66 min
Jul 11, 5:49 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Louisa, Muscatine	56 min
Jul 11, 6:03 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	57 min
Jul 11, 6:11 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Jefferson, Lee, Van Buren	64 min
Jul 11, 6:27 PM CDT	Severe Thunderstorm Warning	DVN	Scott	46 min
Jul 11, 6:30 PM CDT	Flash Flood Warning	DVN	Clinton, Scott	5 hr
Jul 11, 6:33 PM CDT	Flash Flood Warning	DVN	Des Moines, Henry, Louisa, Muscatine	5 hr
Jul 11, 6:57 PM CDT	Areal Flood Warning	DVN	Dubuque	9 hr
Jul 11, 6:58 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Lee	31 min
Jul 10, 7:36 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess, Stephenson	54 min
Jul 10, 8:04 PM CDT	Flash Flood Warning	DVN	Jo Daviess, Stephenson	3 hr
Jul 10, 8:48 PM CDT	Special Weather Statement	DVN	Whiteside	42 min
Jul 10, 9:36 PM CDT	Special Weather Statement	DVN	Rock Island	39 min
Jul 10, 9:37 PM CDT	Tornado Warning	DVN	Bureau	38 min
Jul 10, 10:12 PM CDT	Tornado Warning	DVN	Bureau	48 min
Jul 10, 10:23 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Mercer, Rock Island	32 min
Jul 10, 10:47 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Henry, Putnam	58 min
Jul 10, 10:50 PM CDT	Flash Flood Warning	DVN	Bureau, Putnam	92 min
Jul 11, 5:01 PM CDT	Severe Thunderstorm Warning	DVN	Henderson, Mercer, Warren	44 min
Jul 11, 5:22 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess, Stephenson	53 min
Jul 11, 6:46 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	59 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2025 Every severe thunderstorm warning in 2025

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.