Alert archive / Missouri / Tornado Warnings in 2023
Tornado Warning 27, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Aug 4, 2023, 11:29 PM CDT for Franklin County, Saint Charles County, Warren County, Missouri. It was in force for 24 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
- Aug 4, 2023, 11:29 PM CDT (04:29 UTC)
- Expired
- Aug 4, 2023, 11:53 PM CDT
- In force
- 24 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Franklin County, MO, Saint Charles County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 23 km from the middle of the area, began a volume at 04:28 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 4, 5:17 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 4.5 hours before the alert went out and 264 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
- 203 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1384 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted.
488
WFUS53 KLSX 050429
TORLSX
MOC071-183-219-050515-
/O.NEW.KLSX.TO.W.0027.230805T0429Z-230805T0515Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
1129 PM CDT Fri Aug 4 2023
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Southwestern St. Charles County in east central Missouri...
Northeastern Franklin County in east central Missouri...
Southeastern Warren County in east central Missouri...
* Until 1215 AM CDT.
* At 1128 PM CDT, a severe thunderstorm capable of producing a
tornado was located over Washington, moving east 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 dangerous storm will be near...
Washington and Augusta around 1135 PM CDT.
Defiance around 1145 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid 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.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 3863 9111 3870 9074 3864 9073 3849 9074
3850 9109
TIME...MOT...LOC 0428Z 263DEG 38KT 3857 9103
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
192 follow-up statements
270
WWUS53 KLSX 050441
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1141 PM CDT Fri Aug 4 2023
MOC219-050451-
/O.CAN.KLSX.TO.W.0027.000000T0000Z-230805T0515Z/
Warren MO-
1141 PM CDT Fri Aug 4 2023
...THE TORNADO WARNING FOR SOUTHEASTERN WARREN COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
east central Missouri.
LAT...LON 3866 9096 3870 9074 3864 9073 3852 9074
3852 9093 3855 9097
TIME...MOT...LOC 0441Z 260DEG 33KT 3859 9086
$$
MOC071-183-050515-
/O.CON.KLSX.TO.W.0027.000000T0000Z-230805T0515Z/
St. Charles MO-Franklin MO-
1141 PM CDT Fri Aug 4 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR
SOUTHWESTERN ST. CHARLES AND EAST CENTRAL FRANKLIN COUNTIES...
At 1141 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Augusta, moving east at 40 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 dangerous storm will be near...
Defiance around 1145 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid 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.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 3866 9096 3870 9074 3864 9073 3852 9074
3852 9093 3855 9097
TIME...MOT...LOC 0441Z 260DEG 33KT 3859 9086
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
19999
WWUS53 KLSX 050453
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1153 PM CDT Fri Aug 4 2023
MOC071-183-050502-
/O.CAN.KLSX.TO.W.0027.000000T0000Z-230805T0515Z/
St. Charles MO-Franklin MO-
1153 PM CDT Fri Aug 4 2023
...THE TORNADO WARNING FOR SOUTHWESTERN ST. CHARLES AND EAST CENTRAL
FRANKLIN COUNTIES IS CANCELLED...
The storm which prompted the warning no longer appears capable of
producing a tornado.Therefore, the warning has been cancelled.
However, gusty winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
east central Missouri.
Remember, a Severe Thunderstorm Warning still remains in effect for
St. Charles and Franklin Counties.
LAT...LON 3866 9096 3870 9074 3864 9073 3852 9074
3852 9093 3855 9097
TIME...MOT...LOC 0451Z 263DEG 38KT 3860 9071
$$
19The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 8:21 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Cole, Moniteau | 54 min |
| Aug 4, 8:41 PM CDT | Tornado Warning | LSX | Moniteau | 49 min |
| Aug 4, 9:12 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole, Moniteau | 48 min |
| Aug 4, 9:44 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Osage | 46 min |
| Aug 4, 9:53 PM CDT | Tornado Warning | LSX | Callaway | 22 min |
| Aug 4, 10:02 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Gasconade, Montgomery, Osage | 43 min |
| Aug 4, 11:22 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Charles, Saint Louis, Warren | 38 min |
| Aug 4, 11:52 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 38 min |
| Aug 4, 11:53 PM CDT | Flash Flood Warning | LSX | Knox, Lewis | 4 hr |
| Aug 5, 1:58 AM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 32 min |
| Aug 5, 2:25 AM CDT | Areal Flood Advisory | LSX | Jefferson, Sainte Genevieve, Saint Francois, Washington | 3 hr |
| Aug 5, 2:29 AM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois | 31 min |
Nearby
Tornado Warnings in Missouri, 2023Every tornado warning in 2023Tornadoes in 2023
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.