Alert archive / Iowa / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 79, NWS Quad Cities, IA

July 11, 20255 counties in Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 11, 2025, 3:05 AM CDT for 5 counties in Iowa. It was in force for 33 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, 3:05 AM CDT (08:05 UTC)
Expired: Jul 11, 2025, 3:38 AM CDT
In force: 33 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cedar County, IA, Iowa County, IA, Johnson County, IA, Linn County, IA, Muscatine County, IA

The radar

The Quad Cities radar (KDVN), 78 km from the middle of the area, began a volume at 08:08 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 11, 1:17 AM CDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 8.1 hours before the alert went out and 84 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: 2407 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 12.9

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, 1:48 AM CDT, 1 hour 17 minutes earlier.

Area forecast discussion, Jul 11, 1:48 AM CDT, 1 hour 17 minutes before

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Hazardous weather outlook, Jul 10, 1:51 PM CDT, 13 hours 14 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
151 PM CDT Thu Jul 10 2025

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-111900-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
151 PM CDT Thu Jul 10 2025

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...THIS AFTERNOON AND TONIGHT

There is a Marginal Risk (Level 1 of 5) for severe weather this
afternoon and tonight. A few strong to severe thunderstorms are
expected, especially along and north of Interstate 80. Damaging
winds are the primary hazard, but an isolated tornado can not be
ruled out.

In addition to potential severe weather, flash flooding may also
be possible. Any thunderstorms will be capable of producing very
heavy rainfall. There will be a threat of flash flooding,
especially for areas that receive repeated rounds of
thunderstorms.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

Additional rounds of thunderstorms are expected during the
afternoon on Friday through the early morning on Saturday. There
is a Slight Risk (Level 2 of 5) of severe thunderstorms during
this time. Damaging winds will remain the main hazard with an
isolated large hail and tornado threat.

Flash flooding will continue to be possible across the area,
especially in areas that received rainfall Thursday or multiple
rounds on Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon into tonight,
especially along and north of Interstate 80. Spotter activation
may also be needed across the area on Friday.

In the hours before

Local storm report, Jul 11, 12:04 AM CDT, 3 hours 1 minute before

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Local storm report, Jul 11, 12:07 AM CDT, 2 hours 58 minutes before

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Local storm report, Jul 11, 12:10 AM CDT, 2 hours 55 minutes before

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Local storm report, Jul 11, 12:32 AM CDT, 2 hours 33 minutes before

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Local storm report, Jul 11, 12:49 AM CDT, 2 hours 16 minutes before

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Local storm report, Jul 11, 1:36 AM CDT, 1 hour 29 minutes before

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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, 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, 11:27 AM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Delaware, Linn	37 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.