Alert archive / Illinois / Tornado Warnings in 2026
Tornado Warning 43, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 27, 2026, 4:34 PM CDT for Marion County, Missouri; Adams County, Brown County, Illinois. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2026, 4:34 PM CDT (21:34 UTC)
- Expired
- Apr 27, 2026, 5:03 PM CDT
- In force
- 29 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Adams County, IL, Brown County, IL, Marion County, MO
The radar
The St Louis radar (KLSX), 142 km from the middle of the area, began a volume at 21:39 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.6 hours before the alert went out and 212 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
244
WFUS53 KLSX 272134
TORLSX
ILC001-009-MOC127-272230-
/O.NEW.KLSX.TO.W.0043.260427T2134Z-260427T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
434 PM CDT Mon Apr 27 2026
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Adams County in west central Illinois...
Northwestern Brown County in west central Illinois...
Eastern Marion County in northeastern Missouri...
* Until 530 PM CDT.
* At 434 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Palmyra, moving northeast at 30 mph. Another storm
capable of a tornado is located east of Quincy in Adams County.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
* This tornado will be near...
Hannibal and Palmyra around 435 PM CDT.
Fall Creek around 450 PM CDT.
Other locations impacted by the tornado include Marblehead, Burton,
Adams, Fowler, Liberty, Columbus, Coatsburg and Paloma.
This includes Interstate 172 between exits 2 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 3969 9150 3977 9158 4020 9117 4019 9091
4010 9091 4010 9070 4009 9071 4008 9071
4008 9067 4005 9068 4004 9065 3976 9126
3976 9137 3973 9137 3969 9148
TIME...MOT...LOC 2133Z 232DEG 27KT 3975 9149
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Elmore4 follow-up statements
721
WWUS53 KLSX 272141 RRA
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
441 PM CDT Mon Apr 27 2026
MOC127-272151-
/O.CAN.KLSX.TO.W.0043.000000T0000Z-260427T2230Z/
Marion MO-
441 PM CDT Mon Apr 27 2026
...TORNADO WARNING IS CANCELLED FOR EASTERN MARION COUNTY IN
NORTHEASTERN MISSOURI...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
&&
LAT...LON 3993 9142 4020 9117 4019 9091 4010 9091
4010 9070 4008 9071 4008 9067 4005 9068
4004 9065 3976 9126 3976 9137 3980 9137
3984 9143 3987 9145
TIME...MOT...LOC 2134Z 232DEG 27KT 3976 9148
$$
ILC001-009-272230-
/O.CON.KLSX.TO.W.0043.000000T0000Z-260427T2230Z/
Adams IL-Brown IL-
441 PM CDT Mon Apr 27 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR ADAMS AND
NORTHWESTERN BROWN COUNTIES...
At 441 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fall Creek, or 7 miles southeast of Quincy, moving
northeast at 40 mph. Another storm northeast of Quincy is capable of
producing a tornado.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Quincy, Payson and Fall Creek around 445 PM CDT.
Quincy Regional Airport around 455 PM CDT.
Other locations impacted by the tornado include Marblehead, Burton,
Adams, Liberty, Fowler, Columbus, Paloma, Coatsburg, Mound Station
and La Prairie.
This includes Interstate 172 between exits 2 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 3993 9142 4020 9117 4019 9091 4010 9091
4010 9070 4008 9071 4008 9067 4005 9068
4004 9065 3976 9126 3976 9137 3980 9137
3984 9143 3987 9145
TIME...MOT...LOC 2134Z 232DEG 35KT 3981 9139
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Elmore418
WWUS53 KLSX 272148
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
448 PM CDT Mon Apr 27 2026
ILC001-009-272230-
/O.CON.KLSX.TO.W.0043.000000T0000Z-260427T2230Z/
Adams IL-Brown IL-
448 PM CDT Mon Apr 27 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR EASTERN
ADAMS AND NORTHWESTERN BROWN COUNTIES...
At 448 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Quincy Regional Airport, moving northeast at 45 mph.
Another storm capable of producing a tornado was located near Camp
Point moving northeast at 45 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Quincy Regional Airport and Quincy around 450 PM CDT.
Camp Point around 505 PM CDT.
Other locations impacted by the tornado include Burton, Fowler,
Adams, Liberty, Columbus, Paloma, Coatsburg, La Prairie and Chatton.
This includes Interstate 172 between exits 14 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 3996 9137 4020 9117 4019 9091 4010 9091
4010 9070 4009 9071 4008 9071 4008 9067
4005 9068 4004 9065 3984 9123
TIME...MOT...LOC 2141Z 229DEG 38KT 3988 9131
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Elmore544
WWUS53 KLSX 272156
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
456 PM CDT Mon Apr 27 2026
ILC001-009-272230-
/O.CON.KLSX.TO.W.0043.000000T0000Z-260427T2230Z/
Adams IL-Brown IL-
456 PM CDT Mon Apr 27 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHEASTERN ADAMS AND NORTHWESTERN BROWN COUNTIES...
At 456 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Golden, or 15 miles northeast of Quincy Regional
Airport, moving northeast at 45 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Golden and Clayton around 500 PM CDT.
Other locations impacted by the tornado include La Prairie and
Chatton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 4010 9112 4019 9101 4019 9091 4010 9091
4010 9070 4009 9071 4008 9071 4008 9067
4000 9097
TIME...MOT...LOC 2148Z 229DEG 37KT 4004 9105
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Elmore900
WWUS53 KLSX 272203
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
503 PM CDT Mon Apr 27 2026
ILC001-009-272213-
/O.CAN.KLSX.TO.W.0043.000000T0000Z-260427T2230Z/
Adams IL-Brown IL-
503 PM CDT Mon Apr 27 2026
...TORNADO WARNING IS CANCELLED FOR NORTHEASTERN ADAMS AND
NORTHWESTERN BROWN COUNTIES...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. However, small hail, gusty
winds, and heavy rain are still possible with this thunderstorm.
&&
LAT...LON 4010 9112 4019 9101 4019 9091 4010 9091
4010 9070 4009 9071 4008 9071 4008 9067
4000 9097
TIME...MOT...LOC 2156Z 229DEG 37KT 4009 9097
$$
ElmoreThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 8:43 PM CDT | Tornado Warning | LSX | Boone, Callaway, Cole, Moniteau | 30 min |
| Apr 26, 10:08 PM CDT | Tornado Warning | LSX | Osage | 13 min |
| Apr 27, 1:06 AM CDT | Severe Thunderstorm Warning | LSX | Crawford | 39 min |
| Apr 27, 2:10 AM CDT | Areal Flood Advisory | LSX | Crawford | 3 hr |
| Apr 27, 2:44 AM CDT | Severe Thunderstorm Warning | LSX | Washington | 31 min |
| Apr 27, 3:08 AM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois, Washington | 52 min |
| Apr 27, 3:36 AM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois | 39 min |
| Apr 27, 3:41 AM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Warren | 49 min |
| Apr 27, 4:02 AM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 24 min |
| Apr 27, 6:52 AM CDT | Severe Thunderstorm Warning | LSX | Knox, Shelby | 38 min |
| Apr 27, 7:35 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Monroe, Shelby | 55 min |
| Apr 27, 7:54 AM CDT | Tornado Warning | LSX | Monroe, Ralls | 51 min |
| Apr 27, 8:10 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Lincoln, Marion, Pike, Ralls | 65 min |
| Apr 27, 8:24 AM CDT | Tornado Warning | LSX | Pike, Ralls | 51 min |
| Apr 27, 10:09 AM CDT | River Flood Warning | LSX | Osage | 24 hr |
| Apr 27, 10:41 AM CDT | Flash Flood Warning | LSX | Boone, Cole, Moniteau | 3 hr |
| Apr 27, 11:18 AM CDT | Flood Watch | LSX | Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 10 more | 10 hr |
| Apr 27, 11:48 AM CDT | Flash Flood Warning | LSX | Audrain, Boone, Callaway, Cole, Moniteau, Montgomery and 1 more | 3 hr |
| Apr 27, 12:09 PM CDT | Areal Flood Advisory | LSX | Lincoln, Pike, Warren | 3 hr |
| Apr 27, 12:27 PM CDT | Tornado Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 48 min |
| Apr 27, 1:25 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Saint Louis | 37 min |
| Apr 27, 1:51 PM CDT | Areal Flood Advisory | LSX | Montgomery, Warren | 3 hr |
| Apr 27, 1:55 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 45 min |
| Apr 27, 2:01 PM CDT | Tornado Warning | LSX | City of Saint Louis | 27 min |
| Apr 27, 2:05 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Pike, Warren | 40 min |
| Apr 27, 2:13 PM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 3 hr |
| Apr 27, 2:39 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 51 min |
| Apr 27, 2:42 PM CDT | River Flood Warning | LSX | Monroe | 20 hr |
| Apr 27, 2:49 PM CDT | Tornado Warning | LSX | Saint Charles, Warren | 41 min |
| Apr 27, 2:54 PM CDT | River Flood Warning | LSX | Jefferson, Saint Louis | 6 days |
| Apr 27, 2:57 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Moniteau | 48 min |
| Apr 27, 3:05 PM CDT | River Flood Warning | LSX | Perry, Sainte Genevieve | 8 days |
| Apr 27, 3:14 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 46 min |
| Apr 27, 3:19 PM CDT | Tornado Warning | LSX | Saint Charles, Saint Louis | 41 min |
| Apr 27, 3:25 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway | 42 min |
| Apr 27, 3:37 PM CDT | Flash Flood Warning | LSX | Boone | 5 hr |
| Apr 27, 3:39 PM CDT | River Flood Warning | LSX | Lewis | 11 hr |
| Apr 27, 3:41 PM CDT | River Flood Warning | LSX | Lincoln | 24 hr |
| Apr 27, 3:41 PM CDT | Tornado Warning | LSX | Audrain, Callaway | 49 min |
| Apr 27, 3:43 PM CDT | Severe Thunderstorm Warning | LSX | Boone | 62 min |
| Apr 27, 3:46 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Pike, Ralls | 44 min |
| Apr 27, 3:46 PM CDT | Tornado Warning | LSX | Boone | 14 min |
| Apr 27, 3:53 PM CDT | River Flood Warning | LSX | Lincoln | 4 days |
| Apr 27, 3:59 PM CDT | River Flood Warning | LSX | Crawford, Washington | 18 hr |
| Apr 27, 4:00 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Moniteau | 60 min |
| Apr 27, 4:07 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Pike, Ralls | 53 min |
| Apr 27, 4:09 PM CDT | Tornado Warning | LSX | Audrain, Montgomery, Pike, Ralls | 51 min |
| Apr 27, 4:13 PM CDT | Flash Flood Warning | LSX | Audrain | 5 hr |
| Apr 27, 4:29 PM CDT | Tornado Warning | LSX | Boone, Callaway, Cole, Moniteau | 46 min |
| Apr 27, 4:35 PM CDT | Flash Flood Warning | LSX | Monroe | 5 hr |
| Apr 27, 4:46 PM CDT | Tornado Warning | LSX | Pike | 44 min |
| Apr 27, 4:52 PM CDT | Flash Flood Warning | LSX | Marion, Ralls | 4 hr |
| Apr 27, 4:54 PM CDT | Tornado Warning | LSX | Audrain, Pike | 21 min |
| Apr 27, 4:57 PM CDT | River Flood Warning | LSX | Callaway, Osage | 4 days |
| Apr 27, 4:57 PM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 3 days |
| Apr 27, 4:57 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Pike | 63 min |
| Apr 27, 5:00 PM CDT | Tornado Warning | LSX | Pike | 30 min |
| Apr 27, 5:04 PM CDT | River Flood Warning | LSX | Marion | 22 hr |
| Apr 27, 5:09 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 19 min |
| Apr 27, 5:14 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Osage | 61 min |
| Apr 27, 5:20 PM CDT | Flash Flood Warning | LSX | Pike, Ralls | 3 hr |
| Apr 27, 5:21 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 39 min |
| Apr 27, 5:32 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln | 43 min |
| Apr 27, 5:47 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln | 58 min |
| Apr 27, 5:55 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Warren | 50 min |
| Apr 27, 5:57 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Washington | 48 min |
| Apr 27, 5:59 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 46 min |
| Apr 27, 6:09 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Warren | 36 min |
| Apr 27, 6:26 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson | 64 min |
| Apr 27, 6:28 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 47 min |
| Apr 27, 6:31 PM CDT | Tornado Warning | LSX | Franklin, Jefferson, Washington | 59 min |
| Apr 27, 6:40 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Charles, Saint Louis | 48 min |
| Apr 27, 6:41 PM CDT | Tornado Warning | LSX | Saint Charles, Saint Louis | 32 min |
| Apr 27, 6:45 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 45 min |
| Apr 27, 6:32 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Washington | 43 min |
| Apr 27, 7:03 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 57 min |
| Apr 27, 7:59 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin, Montgomery | 33 min |
| Apr 27, 8:57 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Pike | 48 min |
| Apr 27, 9:03 AM CDT | Tornado Warning | LSX | Greene, Pike | 42 min |
| Apr 27, 9:44 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin | 61 min |
Nearby
Tornado Warnings in Illinois, 2026Tornado Warnings in Missouri, 2026Every tornado warning in 2026Tornadoes in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.