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Home Return to list Severe Thunderstorm Warning 0257 Issued by the Davenport / Quad Cities Forecast Office
Action: New Issued At: 2026-08-12 05:25:36
624
WUUS53 KDVN 121025
SVRDVN
IAC011-031-095-103-113-121130-
/O.NEW.KDVN.SV.W.0257.260812T1025Z-260812T1130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
525 AM CDT Wed Aug 12 2026
The National Weather Service in the Quad Cities has issued a
* Severe Thunderstorm Warning for...
Southwestern Cedar County in east central Iowa...
Northern Johnson County in east central Iowa...
Southeastern Benton County in east central Iowa...
Southwestern Linn County in east central Iowa...
Northeastern Iowa County in east central Iowa...
* Until 630 AM CDT.
* At 525 AM CDT, a severe thunderstorm was located over East Amana,
or 12 miles southwest of Cedar Rapids, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Cedar Rapids, Iowa City, West Branch, Coralville, North Liberty,
Solon, Tiffin, Ely, Walford, Swisher, Oxford, Shueyville, Oakdale,
Amana, Lake Macbride State Park, Rochester, Buchanan, Middle Amana,
Newport, and Cedar Valley.
This includes the following highways...
Interstate 80 in Iowa between mile markers 236 and 264.
Interstate 380 between mile markers 1 and 13.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of natures leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4173 9193 4191 9190 4183 9115 4161 9117
TIME...MOT...LOC 1025Z 278DEG 31KT 4181 9180
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gross
Action: Cancelled Issued At: 2026-08-12 05:41:07
969
WWUS53 KDVN 121040
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
540 AM CDT Wed Aug 12 2026
IAC011-095-113-121049-
/O.CAN.KDVN.SV.W.0257.000000T0000Z-260812T1130Z/
Benton IA-Linn IA-Iowa IA-
540 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BENTON...
SOUTHWESTERN LINN AND NORTHEASTERN IOWA COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4186 9183 4186 9145 4183 9115 4161 9117
4172 9183
TIME...MOT...LOC 1039Z 278DEG 31KT 4179 9164
$$
IAC031-103-121130-
/O.CON.KDVN.SV.W.0257.000000T0000Z-260812T1130Z/
Cedar IA-Johnson IA-
540 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT
FOR SOUTHWESTERN CEDAR AND NORTHERN JOHNSON COUNTIES...
At 539 AM CDT, a severe thunderstorm was located over Cou Falls, or
10 miles northwest of Iowa City, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated. At 530 am, half inch hail was reported 2
miles west of Amana.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Iowa City, West Branch, Coralville, North Liberty, Solon, Tiffin,
Swisher, Oxford, Shueyville, Oakdale, Lake Macbride State Park,
Rochester, Buchanan, Newport, Cedar Valley, Sugar Bottom Camp Ground,
Sutliff, F.W. Kent Park, West Overlook, and Cedar County
Fairgrounds.
This includes the following highways...
Interstate 80 in Iowa between mile markers 238 and 264.
Interstate 380 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of natures leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4186 9183 4186 9145 4183 9115 4161 9117
4172 9183
TIME...MOT...LOC 1039Z 278DEG 31KT 4179 9164
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gross
Action: Continued Issued At: 2026-08-12 05:41:07
969
WWUS53 KDVN 121040
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
540 AM CDT Wed Aug 12 2026
IAC011-095-113-121049-
/O.CAN.KDVN.SV.W.0257.000000T0000Z-260812T1130Z/
Benton IA-Linn IA-Iowa IA-
540 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BENTON...
SOUTHWESTERN LINN AND NORTHEASTERN IOWA COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4186 9183 4186 9145 4183 9115 4161 9117
4172 9183
TIME...MOT...LOC 1039Z 278DEG 31KT 4179 9164
$$
IAC031-103-121130-
/O.CON.KDVN.SV.W.0257.000000T0000Z-260812T1130Z/
Cedar IA-Johnson IA-
540 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT
FOR SOUTHWESTERN CEDAR AND NORTHERN JOHNSON COUNTIES...
At 539 AM CDT, a severe thunderstorm was located over Cou Falls, or
10 miles northwest of Iowa City, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated. At 530 am, half inch hail was reported 2
miles west of Amana.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Iowa City, West Branch, Coralville, North Liberty, Solon, Tiffin,
Swisher, Oxford, Shueyville, Oakdale, Lake Macbride State Park,
Rochester, Buchanan, Newport, Cedar Valley, Sugar Bottom Camp Ground,
Sutliff, F.W. Kent Park, West Overlook, and Cedar County
Fairgrounds.
This includes the following highways...
Interstate 80 in Iowa between mile markers 238 and 264.
Interstate 380 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of natures leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4186 9183 4186 9145 4183 9115 4161 9117
4172 9183
TIME...MOT...LOC 1039Z 278DEG 31KT 4179 9164
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gross
Action: Continued Issued At: 2026-08-12 06:05:08
646
WWUS53 KDVN 121104
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
604 AM CDT Wed Aug 12 2026
IAC031-103-121130-
/O.CON.KDVN.SV.W.0257.000000T0000Z-260812T1130Z/
Cedar IA-Johnson IA-
604 AM CDT Wed Aug 12 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT
FOR SOUTHWESTERN CEDAR AND NORTHEASTERN JOHNSON COUNTIES...
At 604 AM CDT, a severe thunderstorm was located over Cedar Bluff, or
near West Branch, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Iowa City, West Branch, Solon, Rochester, Buchanan, Newport,
Springdale, Cedar Valley, Cedar Bluff, Oasis, Sutliff, Elmira, Cedar
Valley Park, Morse, Herbert Hoover National Historic Site, and Cedar
County Fairgrounds.
This includes Interstate 80 in Iowa between mile markers 246 and 264.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of natures leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4186 9151 4186 9145 4183 9115 4161 9117
4167 9152
TIME...MOT...LOC 1104Z 278DEG 31KT 4176 9135
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gross
Action: Expired Issued At: 2026-08-12 06:25:38
194
WWUS53 KDVN 121125
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
625 AM CDT Wed Aug 12 2026
IAC031-103-121134-
/O.EXP.KDVN.SV.W.0257.000000T0000Z-260812T1130Z/
Cedar IA-Johnson IA-
625 AM CDT Wed Aug 12 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CEDAR AND
NORTHEASTERN JOHNSON COUNTIES WILL EXPIRE AT 630 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However, heavy
rain is still possible with this thunderstorm.
&&
LAT...LON 4186 9151 4186 9145 4183 9115 4161 9117
4167 9152
TIME...MOT...LOC 1124Z 278DEG 31KT 4174 9113
$$
Gross
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