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Home Return to list Severe Thunderstorm Warning 0311 Issued by the Des Moines Forecast Office
Action: New Issued At: 2026-08-07 16:16:27
095
WUUS53 KDMX 072116
SVRDMX
IAC013-075-171-072215-
/O.NEW.KDMX.SV.W.0311.260807T2116Z-260807T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
416 PM CDT Fri Aug 7 2026
The National Weather Service in Des Moines has issued a
* Severe Thunderstorm Warning for...
Black Hawk County in northeastern Iowa...
Northeastern Tama County in central Iowa...
Northeastern Grundy County in central Iowa...
* Until 515 PM CDT.
* At 415 PM CDT, a severe thunderstorm was located near Holland, or 7
miles north of Grundy Center, 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...
Waterloo, Cedar Falls, Evansdale, Jesup, La Porte City, Hudson,
Reinbeck, Dysart, Dike, Elk Run Heights, Crossroads Mall, Uni-Dome
And McLeod Center, Washburn, Raymond, Gilbertville, Stout,
Morrison, Tf Clark State Park, and George Wyth State Park.
This includes Interstate 380 between mile markers 56 and 73.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4230 9230 4215 9230 4231 9275 4253 9275
4255 9208 4247 9208 4247 9206 4230 9206
TIME...MOT...LOC 2115Z 277DEG 32KT 4247 9281
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hagenhoff
Action: Cancelled Issued At: 2026-08-07 16:37:58
713
WWUS53 KDMX 072137
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
437 PM CDT Fri Aug 7 2026
IAC075-072147-
/O.CAN.KDMX.SV.W.0311.000000T0000Z-260807T2215Z/
Grundy IA-
437 PM CDT Fri Aug 7 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRUNDY COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central and northeastern Iowa.
LAT...LON 4230 9230 4220 9230 4231 9253 4254 9253
4255 9208 4247 9208 4247 9206 4230 9206
TIME...MOT...LOC 2137Z 277DEG 32KT 4245 9254
$$
IAC013-171-072215-
/O.CON.KDMX.SV.W.0311.000000T0000Z-260807T2215Z/
Black Hawk IA-Tama IA-
437 PM CDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR BLACK HAWK AND NORTHEASTERN TAMA COUNTIES...
At 437 PM CDT, a severe thunderstorm was located near Dike, or 6
miles southwest of Cedar Falls, 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...
Waterloo, Cedar Falls, Evansdale, Jesup, La Porte City, Hudson, Elk
Run Heights, Crossroads Mall, Uni-Dome And McLeod Center, Waterloo
Municipal Airport, Washburn, Raymond, Gilbertville, and George Wyth
State Park.
This includes Interstate 380 between mile markers 56 and 73.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4230 9230 4220 9230 4231 9253 4254 9253
4255 9208 4247 9208 4247 9206 4230 9206
TIME...MOT...LOC 2137Z 277DEG 32KT 4245 9254
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hagenhoff
Action: Continued Issued At: 2026-08-07 16:37:58
713
WWUS53 KDMX 072137
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
437 PM CDT Fri Aug 7 2026
IAC075-072147-
/O.CAN.KDMX.SV.W.0311.000000T0000Z-260807T2215Z/
Grundy IA-
437 PM CDT Fri Aug 7 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRUNDY COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central and northeastern Iowa.
LAT...LON 4230 9230 4220 9230 4231 9253 4254 9253
4255 9208 4247 9208 4247 9206 4230 9206
TIME...MOT...LOC 2137Z 277DEG 32KT 4245 9254
$$
IAC013-171-072215-
/O.CON.KDMX.SV.W.0311.000000T0000Z-260807T2215Z/
Black Hawk IA-Tama IA-
437 PM CDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR BLACK HAWK AND NORTHEASTERN TAMA COUNTIES...
At 437 PM CDT, a severe thunderstorm was located near Dike, or 6
miles southwest of Cedar Falls, 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...
Waterloo, Cedar Falls, Evansdale, Jesup, La Porte City, Hudson, Elk
Run Heights, Crossroads Mall, Uni-Dome And McLeod Center, Waterloo
Municipal Airport, Washburn, Raymond, Gilbertville, and George Wyth
State Park.
This includes Interstate 380 between mile markers 56 and 73.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4230 9230 4220 9230 4231 9253 4254 9253
4255 9208 4247 9208 4247 9206 4230 9206
TIME...MOT...LOC 2137Z 277DEG 32KT 4245 9254
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hagenhoff
Action: Continued Issued At: 2026-08-07 17:00:05
471
WWUS53 KDMX 072159
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
459 PM CDT Fri Aug 7 2026
IAC013-171-072215-
/O.CON.KDMX.SV.W.0311.000000T0000Z-260807T2215Z/
Black Hawk IA-Tama IA-
459 PM CDT Fri Aug 7 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN BLACK HAWK AND NORTHEASTERN TAMA COUNTIES...
At 459 PM CDT, a severe thunderstorm was located over La Porte City,
or 13 miles southeast of Waterloo, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Jesup, La Porte City, Washburn, and Gilbertville.
This includes Interstate 380 between mile markers 56 and 63.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4230 9230 4220 9230 4231 9253 4247 9206
4230 9206
TIME...MOT...LOC 2159Z 289DEG 42KT 4234 9220
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Hagenhoff
Action: Expired Issued At: 2026-08-07 17:10:29
779
WWUS53 KDMX 072209
SVSDMX
Severe Weather Statement
National Weather Service Des Moines IA
509 PM CDT Fri Aug 7 2026
IAC013-171-072219-
/O.EXP.KDMX.SV.W.0311.000000T0000Z-260807T2215Z/
Black Hawk IA-Tama IA-
509 PM CDT Fri Aug 7 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BLACK HAWK AND
NORTHEASTERN TAMA COUNTIES WILL EXPIRE AT 515 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central and northeastern Iowa.
LAT...LON 4230 9230 4220 9230 4231 9253 4247 9206
4230 9206
TIME...MOT...LOC 2209Z 277DEG 32KT 4233 9209
$$
Hagenhoff
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