Alert archive / Iowa / Tornado Warnings in 2026
Tornado Warning 84, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Aug 11, 2026, 8:01 AM CDT for Clinton County, Jackson County, Iowa. It was in force for 44 min. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 11, 2026, 8:01 AM CDT (13:01 UTC)
- Expired
- Aug 11, 2026, 8:45 AM CDT
- In force
- 44 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Clinton County, IA, Jackson County, IA
The radar
The Quad Cities radar (KDVN), 46 km from the middle of the area, began a volume at 13:00 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 8:02 AM CDT | TSTM WND DMG | 1 Ene Baldwin, IA | Large branch downed. Time estimated using radar. |
| Aug 11, 8:10 AM CDT | TSTM WND DMG | Maquoketa, IA | Report of lots of tree damage with lots of branches, including some 1-3 inch, downed and broken or uprooted trees. Time estimated from radar. |
| Aug 11, 8:15 AM CDT | TSTM WND GST 64 | 1 Wnw Maquoketa, IA | IADOT RWIS. |
| Aug 11, 8:20 AM CDT | TSTM WND GST 68 | 1 Wnw Maquoketa, IA | IADOT RWIS. |
| Aug 11, 8:25 AM CDT | TSTM WND GST 61 | 3 E Elwood, IA | PWS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 11, 7:22 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 1.0 hours before the alert went out and 45 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.
- Mixed-layer CAPE
- 4268 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 891 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 9.5
The text
As transmitted.
654
WFUS53 KDVN 111301
TORDVN
IAC045-097-111345-
/O.NEW.KDVN.TO.W.0084.260811T1301Z-260811T1345Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
801 AM CDT Tue Aug 11 2026
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Southwestern Jackson County in east central Iowa...
Northeastern Clinton County in east central Iowa...
* Until 845 AM CDT.
* At 801 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Nashville, or near Maquoketa, moving southeast at
40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Maquoketa, Delmar, Hurstville, Buckhorn, Maquoketa Municipal
Airport, Elwood, and Jackson County Fairgrounds around 805 AM CDT.
Charlotte around 815 AM CDT.
Other locations in the path of this tornadic thunderstorm include
Goose Lake, Bryant and Elvira.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4206 9029 4185 9033 4185 9049 4208 9087
4211 9086 4216 9081
TIME...MOT...LOC 1301Z 307DEG 34KT 4209 9077
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Gibbs2 follow-up statements
337
WWUS53 KDVN 111307
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
807 AM CDT Tue Aug 11 2026
IAC045-097-111345-
/O.CON.KDVN.TO.W.0084.000000T0000Z-260811T1345Z/
Jackson IA-Clinton IA-
807 AM CDT Tue Aug 11 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 AM CDT FOR SOUTH
CENTRAL JACKSON AND NORTHEASTERN CLINTON COUNTIES...
At 807 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Maquoketa Municipal Airport, or over Maquoketa,
moving southeast at 45 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Maquoketa, Delmar, and Jackson County Fairgrounds around 810 AM
CDT.
Charlotte around 815 AM CDT.
Goose Lake around 820 AM CDT.
Other locations in the path of this tornadic thunderstorm include
Bryant and Elvira.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4206 9029 4185 9033 4185 9049 4205 9082
4207 9078 4212 9072
TIME...MOT...LOC 1307Z 307DEG 38KT 4203 9069
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Gibbs841
WWUS53 KDVN 111318
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
818 AM CDT Tue Aug 11 2026
IAC097-111328-
/O.CAN.KDVN.TO.W.0084.000000T0000Z-260811T1345Z/
Jackson IA-
818 AM CDT Tue Aug 11 2026
...THE TORNADO WARNING FOR SOUTH CENTRAL JACKSON COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
east central Iowa.
&&
LAT...LON 4198 9030 4185 9033 4185 9049 4196 9067
4203 9060 4203 9053
TIME...MOT...LOC 1318Z 307DEG 34KT 4196 9057
$$
IAC045-111345-
/O.CON.KDVN.TO.W.0084.000000T0000Z-260811T1345Z/
Clinton IA-
818 AM CDT Tue Aug 11 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 AM CDT FOR
NORTHEASTERN CLINTON COUNTY...
At 818 AM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located near
Delmar, or 8 miles southeast of Maquoketa, moving southeast at 40
mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
These dangerous storms will be near...
Charlotte, Goose Lake, and Elvira around 825 AM CDT.
Other locations in the path of this tornadic thunderstorm include
Bryant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4198 9030 4185 9033 4185 9049 4196 9067
4203 9060 4203 9053
TIME...MOT...LOC 1318Z 307DEG 34KT 4196 9057
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 9:02 PM CDT | Tornado Warning | DVN | Delaware | 43 min |
| Aug 11, 5:08 AM CDT | Special Weather Statement | DVN | Benton | 37 min |
| Aug 11, 6:53 AM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Linn | 52 min |
| Aug 11, 7:09 AM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Jones, Linn | 81 min |
| Aug 11, 7:11 AM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware, Jones, Linn | 49 min |
| Aug 11, 7:15 AM CDT | Tornado Warning | DVN | Buchanan, Delaware | 45 min |
| Aug 11, 7:33 AM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 57 min |
| Aug 11, 7:36 AM CDT | Tornado Warning | DVN | Delaware, Dubuque | 39 min |
| Aug 11, 7:59 AM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson, Jones | 61 min |
| Aug 11, 8:20 AM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 43 min |
| Aug 11, 8:29 AM CDT | Tornado Warning | DVN | Clinton | 20 min |
| Aug 11, 8:38 AM CDT | Tornado Warning | DVN | Scott | 23 min |
| Aug 11, 8:54 AM CDT | Severe Thunderstorm Warning | DVN | Scott | 81 min |
Nearby
Tornado Warnings in Iowa, 2026Every tornado warning in 2026Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.