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Home Return to list Severe Thunderstorm Warning 0228 Issued by the St. Louis Forecast Office
Action: New Issued At: 2026-08-12 16:22:25
669
WUUS53 KLSX 122121
SVRLSX
MOC027-073-139-151-122200-
/O.NEW.KLSX.SV.W.0228.260812T2121Z-260812T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
421 PM CDT Wed Aug 12 2026
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
East Central Callaway County in central Missouri...
Northeastern Osage County in central Missouri...
Northwestern Gasconade County in east central Missouri...
Southwestern Montgomery County in east central Missouri...
* Until 500 PM CDT.
* At 421 PM CDT, a severe thunderstorm was located 6 miles east of
Chamois, or 13 miles west of Hermann, moving southeast at 20 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
* Locations impacted include...
Chamois, Portland, Morrison, Rhineland, Gasconade, Hermann and Bay.
This includes the following State Parks...
Deutschheim Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
&&
LAT...LON 3869 9176 3880 9166 3870 9139 3850 9156
3865 9179
TIME...MOT...LOC 2121Z 303DEG 16KT 3870 9168
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Carney
Action: Cancelled Issued At: 2026-08-12 16:41:40
248
WWUS53 KLSX 122141
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
441 PM CDT Wed Aug 12 2026
MOC027-122151-
/O.CAN.KLSX.SV.W.0228.000000T0000Z-260812T2200Z/
Callaway MO-
441 PM CDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EAST CENTRAL CALLAWAY
COUNTY...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
&&
LAT...LON 3870 9165 3873 9156 3870 9139 3850 9156
3863 9174 3869 9176 3870 9174 3871 9173
3871 9170 3870 9167
TIME...MOT...LOC 2121Z 303DEG 16KT 3870 9167
$$
MOC073-139-151-122200-
/O.CON.KLSX.SV.W.0228.000000T0000Z-260812T2200Z/
Gasconade MO-Montgomery MO-Osage MO-
441 PM CDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 5 PM CDT FOR
NORTHEASTERN OSAGE COUNTY IN CENTRAL MISSOURI AND NORTHWESTERN
GASCONADE AND SOUTHWESTERN MONTGOMERY COUNTIES IN EAST CENTRAL
MISSOURI...
At 441 PM CDT, a severe thunderstorm was located 9 miles east of
Chamois, or 11 miles southwest of Hermann, moving southeast at 15
mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Morrison, Gasconade, Rhineland, Hermann and Bay.
This includes the following State Parks...
Deutschheim Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
&&
LAT...LON 3870 9165 3873 9156 3870 9139 3850 9156
3863 9174 3869 9176 3870 9174 3871 9173
3871 9170 3870 9167
TIME...MOT...LOC 2121Z 311DEG 14KT 3869 9170
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Carney
Action: Continued Issued At: 2026-08-12 16:41:40
248
WWUS53 KLSX 122141
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
441 PM CDT Wed Aug 12 2026
MOC027-122151-
/O.CAN.KLSX.SV.W.0228.000000T0000Z-260812T2200Z/
Callaway MO-
441 PM CDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EAST CENTRAL CALLAWAY
COUNTY...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
&&
LAT...LON 3870 9165 3873 9156 3870 9139 3850 9156
3863 9174 3869 9176 3870 9174 3871 9173
3871 9170 3870 9167
TIME...MOT...LOC 2121Z 303DEG 16KT 3870 9167
$$
MOC073-139-151-122200-
/O.CON.KLSX.SV.W.0228.000000T0000Z-260812T2200Z/
Gasconade MO-Montgomery MO-Osage MO-
441 PM CDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 5 PM CDT FOR
NORTHEASTERN OSAGE COUNTY IN CENTRAL MISSOURI AND NORTHWESTERN
GASCONADE AND SOUTHWESTERN MONTGOMERY COUNTIES IN EAST CENTRAL
MISSOURI...
At 441 PM CDT, a severe thunderstorm was located 9 miles east of
Chamois, or 11 miles southwest of Hermann, moving southeast at 15
mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Morrison, Gasconade, Rhineland, Hermann and Bay.
This includes the following State Parks...
Deutschheim Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
&&
LAT...LON 3870 9165 3873 9156 3870 9139 3850 9156
3863 9174 3869 9176 3870 9174 3871 9173
3871 9170 3870 9167
TIME...MOT...LOC 2121Z 311DEG 14KT 3869 9170
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Carney
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