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Home Return to list Severe Thunderstorm Warning 0250 Issued by the Davenport / Quad Cities Forecast Office
Action: New Issued At: 2026-08-11 08:15:56
147
WUUS53 KDVN 111315
SVRDVN
ILC015-085-177-111415-
/O.NEW.KDVN.SV.W.0250.260811T1315Z-260811T1415Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
815 AM CDT Tue Aug 11 2026
The National Weather Service in the Quad Cities has issued a
* Severe Thunderstorm Warning for...
Jo Daviess County in northwestern Illinois...
Northern Carroll County in northwestern Illinois...
Western Stephenson County in northwestern Illinois...
* Until 915 AM CDT.
* At 815 AM CDT, severe thunderstorms were located along a line
extending from East Dubuque to near Spruce Creek Park, moving east
at 55 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Freeport, Galena, Mount Carroll, Savanna, Lena, Stockton, East
Dubuque, Lanark, Hanover, Pearl City, Elizabeth, Shannon, Woodbine,
Scales Mound, Menominee, Council Hill, Nora, Schapville, Massbach,
and Buena Vista.
This also includes Apple River Canyon State Park, Lake Le-Aqua-
Na State Recreation Area, and Mississippi Palisades State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4244 8967 4202 8969 4210 9016 4212 9016
4213 9020 4216 9022 4221 9037 4228 9043
4233 9042 4238 9047 4245 9060 4251 9062
TIME...MOT...LOC 1315Z 285DEG 48KT 4249 9065 4231 9047
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Gibbs
Action: Continued Issued At: 2026-08-11 08:27:41
277
WWUS53 KDVN 111327
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
827 AM CDT Tue Aug 11 2026
ILC015-085-177-111415-
/O.CON.KDVN.SV.W.0250.000000T0000Z-260811T1415Z/
Jo Daviess IL-Carroll IL-Stephenson IL-
827 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR JO DAVIESS...NORTHERN CARROLL AND WESTERN STEPHENSON COUNTIES...
At 826 AM CDT, severe thunderstorms were located along a line
extending from near Hazel Green to Elizabeth to Mississippi Palisades
State Park, moving east at 55 mph.
HAZARD...70 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Freeport, Galena, Mount Carroll, Savanna, Lena, Stockton, Lanark,
Hanover, Pearl City, Elizabeth, Shannon, Woodbine, Scales Mound,
Menominee, Council Hill, Nora, Schapville, Massbach, Buena Vista, and
Loran.
This also includes Apple River Canyon State Park, Lake Le-Aqua-
Na State Recreation Area, and Mississippi Palisades State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4244 8967 4202 8969 4210 9016 4212 9016
4213 9020 4216 9022 4221 9037 4228 9043
4233 9042 4238 9047 4245 9060 4250 9059
TIME...MOT...LOC 1326Z 286DEG 48KT 4248 9045 4231 9024 4212 9017
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Gibbs
Action: Correction Issued At: 2026-08-11 08:36:42
539
WWUS53 KDVN 111336 CCA
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
836 AM CDT Tue Aug 11 2026
ILC015-085-177-111430-
/O.COR.KDVN.SV.W.0250.000000T0000Z-260811T1415Z/
Jo Daviess IL-Carroll IL-Stephenson IL-
836 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR JO DAVIESS...NORTHERN CARROLL AND WESTERN STEPHENSON COUNTIES...
At 836 AM CDT, severe thunderstorms were located along a line
extending from near Apple Canyon Lake to Elmoville to near Center
Hill, moving east at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Freeport, Galena, Mount Carroll, Savanna, Lena, Stockton, Lanark,
Hanover, Pearl City, Elizabeth, Shannon, Woodbine, Scales Mound,
Menominee, Council Hill, Nora, Schapville, Massbach, Buena Vista, and
Loran.
This also includes Apple River Canyon State Park, Lake Le-Aqua-
Na State Recreation Area, and Mississippi Palisades State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4244 8967 4202 8969 4210 9016 4212 9016
4213 9020 4216 9022 4221 9037 4228 9043
4233 9042 4238 9047 4245 9060 4250 9059
TIME...MOT...LOC 1327Z 273DEG 43KT 4248 9045 4231 9024 4212 9017
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Gibbs
Action: Continued Issued At: 2026-08-11 08:41:12
590
WWUS53 KDVN 111341
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
841 AM CDT Tue Aug 11 2026
ILC015-085-177-111415-
/O.CON.KDVN.SV.W.0250.000000T0000Z-260811T1415Z/
Jo Daviess IL-Carroll IL-Stephenson IL-
841 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR EASTERN JO DAVIESS...NORTHEASTERN CARROLL AND WESTERN STEPHENSON
COUNTIES...
At 841 AM CDT, severe thunderstorms were located along a line
extending from Scales Mound to Stockton Airport to Mount Carroll,
moving east at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Freeport, Mount Carroll, Savanna, Lena, Stockton, Lanark, Pearl City,
Shannon, Woodbine, Nora, Schapville, Massbach, Buena Vista, Loran,
Kent, Eleroy, Damascus, Lake Le-Aqua-
na State Park, Mc Connell, and Apple River Canyon State Park.
This also includes Apple River Canyon State Park and Lake Le-Aqua-
Na State Recreation Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4244 8967 4202 8969 4210 9016 4212 9016
4221 9015 4231 9015 4236 9019 4241 9021
4248 9023
TIME...MOT...LOC 1341Z 273DEG 43KT 4247 9024 4230 9003 4211 8996
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Gibbs
Action: Continued Issued At: 2026-08-11 08:58:13
011
WWUS53 KDVN 111357
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
857 AM CDT Tue Aug 11 2026
ILC015-085-177-111415-
/O.CON.KDVN.SV.W.0250.000000T0000Z-260811T1415Z/
Jo Daviess IL-Carroll IL-Stephenson IL-
857 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR EASTERN JO DAVIESS...NORTHEASTERN CARROLL AND WESTERN STEPHENSON
COUNTIES...
At 857 AM CDT, severe thunderstorms were located along a line
extending from near Jo Daviess County Fairgrounds to near Pearl City
to near Shannon, moving east at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Freeport, Mount Carroll, Lena, Stockton, Lanark, Pearl City, Shannon,
Nora, Buena Vista, Loran, Kent, Waddams Grove, Eleroy, Damascus, Lake
Le-Aqua-
na State Park, Mc Connell, Willow, Apple River Canyon State Park, and
Bolton.
This also includes Apple River Canyon State Park and Lake Le-Aqua-
Na State Recreation Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4244 8967 4202 8969 4208 8998 4214 8994
4227 8998 4234 8997 4240 9006 4242 9011
4247 9016
TIME...MOT...LOC 1357Z 273DEG 43KT 4246 8999 4229 8978 4210 8971
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Gibbs
Action: Continued Issued At: 2026-08-11 09:09:43
369
WWUS53 KDVN 111409
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
909 AM CDT Tue Aug 11 2026
ILC015-085-177-111415-
/O.CON.KDVN.SV.W.0250.000000T0000Z-260811T1415Z/
Jo Daviess IL-Carroll IL-Stephenson IL-
909 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR EASTERN JO DAVIESS...NORTHEASTERN CARROLL AND WESTERN STEPHENSON
COUNTIES...
At 909 AM CDT, severe thunderstorms were located along a line
extending from near Lake Le-Aqua-
na State Park to Freeport to near Forreston, moving east at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Trained weather spotters.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Freeport, Mount Carroll, Lena, Stockton, Lanark, Pearl City, Shannon,
Nora, Buena Vista, Loran, Kent, Waddams Grove, Eleroy, Damascus, Lake
Le-Aqua-
na State Park, Mc Connell, Willow, Apple River Canyon State Park, and
Bolton.
This also includes Apple River Canyon State Park and Lake Le-Aqua-
Na State Recreation Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4244 8967 4202 8969 4208 8998 4214 8994
4227 8998 4234 8997 4240 9006 4242 9011
4247 9016
TIME...MOT...LOC 1409Z 273DEG 43KT 4245 8983 4228 8962 4209 8955
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Gibbs
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