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Home Return to list Severe Thunderstorm Warning 0258 Issued by the St. Louis Forecast Office
Action: New Issued At: 2026-09-20 22:47:52
190
WUUS53 KLSX 210347
SVRLSX
ILC133-MOC099-210430-
/O.NEW.KLSX.SV.W.0258.260921T0347Z-260921T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1047 PM CDT Sun Sep 20 2026
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northwestern Monroe County in southwestern Illinois...
Northeastern Jefferson County in east central Missouri...
* Until 1130 PM CDT.
* At 1047 PM CDT, a severe thunderstorm was located over Horine, or
over Pevely, moving east at 20 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...
Festus, Antonia, Horine, Crystal City, Pevely, Herculaneum,
Barnhart, Imperial, Harrisonville, Kimmswick, Valmeyer, Monroe
City, Fountain, Madonnaville, Maeystown, Foster Pond, Waterloo and
Columbia.
This includes the following State Parks...
Illinois Caverns State Natural Area, Mastodon Historic Site and Gov.
Dunklins Grave Historic Site.
This includes Interstate 55 in Missouri between exits 175 and 187.
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 3820 9048 3836 9050 3841 9035 3840 9034
3839 9034 3840 9032 3842 9030 3846 9018
3845 9018 3821 9011
TIME...MOT...LOC 0347Z 257DEG 15KT 3830 9044
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Carney
Action: Continued Issued At: 2026-09-20 23:16:42
958
WWUS53 KLSX 210416
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1116 PM CDT Sun Sep 20 2026
MOC099-210426-
/O.CAN.KLSX.SV.W.0258.000000T0000Z-260921T0430Z/
Jefferson MO-
1116 PM CDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHEASTERN
JEFFERSON COUNTY...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.
&&
LAT...LON 3840 9032 3842 9030 3846 9018 3845 9018
3821 9011 3820 9035 3821 9035 3822 9036
3826 9037 3834 9037 3838 9035 3839 9033
TIME...MOT...LOC 0347Z 257DEG 15KT 3830 9044
$$
ILC133-210430-
/O.CON.KLSX.SV.W.0258.000000T0000Z-260921T0430Z/
Monroe IL-
1116 PM CDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHWESTERN MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
At 1116 PM CDT, a severe thunderstorm was located near Valmeyer, or
near Waterloo, moving northeast at 25 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...
Harrisonville, Chalfin Bridge, Valmeyer, Monroe City, Madonnaville,
Fountain, Maeystown, Foster Pond, Wartburg, Burksville, New
Hanover, Waterloo and Columbia.
This includes the following State Parks...
Illinois Caverns State Natural Area.
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 3840 9032 3842 9030 3846 9018 3845 9018
3821 9011 3820 9035 3821 9035 3822 9036
3826 9037 3834 9037 3838 9035 3839 9033
TIME...MOT...LOC 0347Z 247DEG 20KT 3825 9042
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kimble
Action: Cancelled Issued At: 2026-09-20 23:16:42
958
WWUS53 KLSX 210416
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1116 PM CDT Sun Sep 20 2026
MOC099-210426-
/O.CAN.KLSX.SV.W.0258.000000T0000Z-260921T0430Z/
Jefferson MO-
1116 PM CDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHEASTERN
JEFFERSON COUNTY...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.
&&
LAT...LON 3840 9032 3842 9030 3846 9018 3845 9018
3821 9011 3820 9035 3821 9035 3822 9036
3826 9037 3834 9037 3838 9035 3839 9033
TIME...MOT...LOC 0347Z 257DEG 15KT 3830 9044
$$
ILC133-210430-
/O.CON.KLSX.SV.W.0258.000000T0000Z-260921T0430Z/
Monroe IL-
1116 PM CDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHWESTERN MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
At 1116 PM CDT, a severe thunderstorm was located near Valmeyer, or
near Waterloo, moving northeast at 25 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...
Harrisonville, Chalfin Bridge, Valmeyer, Monroe City, Madonnaville,
Fountain, Maeystown, Foster Pond, Wartburg, Burksville, New
Hanover, Waterloo and Columbia.
This includes the following State Parks...
Illinois Caverns State Natural Area.
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 3840 9032 3842 9030 3846 9018 3845 9018
3821 9011 3820 9035 3821 9035 3822 9036
3826 9037 3834 9037 3838 9035 3839 9033
TIME...MOT...LOC 0347Z 247DEG 20KT 3825 9042
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kimble
Action: Cancelled Issued At: 2026-09-20 23:20:43
983
WWUS53 KLSX 210420
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1120 PM CDT Sun Sep 20 2026
ILC133-210430-
/O.CAN.KLSX.SV.W.0258.000000T0000Z-260921T0430Z/
Monroe IL-
1120 PM CDT Sun Sep 20 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHWESTERN MONROE
COUNTY IN SOUTHWESTERN ILLINOIS...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However, heavy rain is
still possible with this thunderstorm.
&&
LAT...LON 3840 9032 3842 9030 3846 9018 3845 9018
3821 9011 3820 9035 3821 9035 3822 9036
3826 9037 3834 9037 3838 9035 3839 9033
TIME...MOT...LOC 0416Z 247DEG 20KT 3832 9023
$$
Kimble
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