Alert archive / Missouri / Tornado Warnings in 2024
Tornado Warning 49, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 7, 2024, 4:23 AM CDT for Calhoun County, Illinois; Saint Charles County, Saint Louis County, Missouri. It was in force for 37 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
- May 7, 2024, 4:23 AM CDT (09:23 UTC)
- Expired
- May 7, 2024, 5:00 AM CDT
- In force
- 37 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Calhoun County, IL, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 3 km from the middle of the area, began a volume at 09:23 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 |
|---|---|---|---|
| May 7, 12:53 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 9.4 hours before the alert went out and 239 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
- 4 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 937 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
158
WFUS53 KLSX 070923
TORLSX
ILC013-MOC183-189-071000-
/O.NEW.KLSX.TO.W.0049.240507T0923Z-240507T1000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
423 AM CDT Tue May 7 2024
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Southern Calhoun County in southwestern Illinois...
Western St. Charles County in east central Missouri...
Northwestern St. Louis County in east central Missouri...
* Until 500 AM CDT.
* At 423 AM CDT, a severe thunderstorm capable of producing a
tornado was located over mainly rural areas of St Charles County,
moving northeast at 45 mph.
HAZARD...Tornado.
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...
O'Fallon, St. Peters, Chesterfield, Dardenne Prairie, Weldon
Spring, Cottleville, and Weldon Spring Heights around 430 AM CDT.
St. Charles and Harvester around 435 AM CDT.
Bridgeton around 440 AM CDT.
Other locations in the path of this tornadic thunderstorm include
Hazelwood.
This also includes First Missouri State Capitol Historic Site.
This includes Interstate 70 in Missouri between exits 216 and 231.
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.
&&
LAT...LON 3876 9036 3862 9073 3864 9073 3861 9076
3859 9082 3871 9092 3894 9053
TIME...MOT...LOC 0923Z 237DEG 40KT 3869 9077
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Elmore3 follow-up statements
173
WWUS53 KLSX 070932
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
Issued by National Weather Service Kansas City/Pleasant Hill MO
432 AM CDT Tue May 7 2024
ILC013-MOC183-189-071000-
/O.CON.KLSX.TO.W.0049.000000T0000Z-240507T1000Z/
Calhoun IL-St. Charles MO-St. Louis MO-
432 AM CDT Tue May 7 2024
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR SOUTHERN
CALHOUN...CENTRAL ST. CHARLES AND NORTHWESTERN ST. LOUIS COUNTIES...
At 431 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Weldon Spring Heights, moving northeast at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
O'Fallon, St. Peters, Chesterfield, Dardenne Prairie, Weldon
Spring, Cottleville, Spirit of St. Louis Airport, Weldon Spring
Heights, and Harvester around 435 AM CDT.
St. Charles and Maryland Heights around 440 AM CDT.
Other locations in the path of this tornadic thunderstorm include
Bridgeton, Champ, Hazelwood and Lambert-St. Louis International
Airport.
This also includes First Missouri State Capitol Historic Site.
This includes Interstate 70 in Missouri between exits 217 and 231.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3876 9036 3863 9072 3873 9082 3893 9052
TIME...MOT...LOC 0931Z 242DEG 35KT 3870 9069
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
BMW214
WWUS53 KLSX 070942
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
442 AM CDT Tue May 7 2024
ILC013-MOC183-189-071000-
/O.CON.KLSX.TO.W.0049.000000T0000Z-240507T1000Z/
Calhoun IL-St. Charles MO-St. Louis MO-
442 AM CDT Tue May 7 2024
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR SOUTHERN
CALHOUN...CENTRAL ST. CHARLES AND NORTHWESTERN ST. LOUIS COUNTIES...
At 441 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Harvester, moving northeast at 45 mph.
HAZARD...Tornado.
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...
St. Charles, St. Peters, Maryland Heights, Hazelwood, Bridgeton,
and Champ around 445 AM CDT.
This also includes First Missouri State Capitol Historic Site.
This includes Interstate 70 in Missouri between exits 219 and 231.
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.
&&
LAT...LON 3876 9036 3867 9061 3881 9070 3893 9052
TIME...MOT...LOC 0941Z 237DEG 40KT 3876 9056
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Elmore301 WWUS53 KLSX 070956 SVSLSX Severe Weather Statement National Weather Service St Louis MO 456 AM CDT Tue May 7 2024 ILC013-MOC183-189-071006- /O.EXP.KLSX.TO.W.0049.000000T0000Z-240507T1000Z/ Calhoun IL-St. Charles MO-St. Louis MO- 456 AM CDT Tue May 7 2024 ...THE TORNADO WARNING FOR SOUTHERN CALHOUN...CENTRAL ST. CHARLES AND NORTHWESTERN ST. LOUIS COUNTIES WILL EXPIRE AT 500 AM CDT... The storm which prompted the warning has weakened below severe limits, and no longer appears capable of producing a tornado. Therefore, the warning will be allowed to expire. A Tornado Watch remains in effect until 800 AM CDT for southwestern Illinois...and east central Missouri. && LAT...LON 3876 9036 3867 9061 3881 9070 3893 9052 TIME...MOT...LOC 0956Z 237DEG 40KT 3883 9042 $$ Elmore
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 4:05 AM CDT | Severe Thunderstorm Warning | LSX | Monroe | 40 min |
| May 7, 4:58 AM CDT | Severe Thunderstorm Warning | LSX | Randolph | 47 min |
| May 7, 5:03 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin, Montgomery | 42 min |
| May 7, 5:37 AM CDT | Severe Thunderstorm Warning | LSX | Randolph | 15 min |
| May 7, 1:12 AM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 78 min |
| May 7, 1:25 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Monroe | 80 min |
| May 7, 2:05 AM CDT | Severe Thunderstorm Warning | LSX | Knox, Shelby | 70 min |
| May 7, 2:15 AM CDT | Severe Thunderstorm Warning | LSX | Osage | 60 min |
| May 7, 2:19 AM CDT | Severe Thunderstorm Warning | LSX | Monroe | 41 min |
| May 7, 2:34 AM CDT | Tornado Warning | LSX | Knox | 14 min |
| May 7, 2:41 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway, Montgomery | 64 min |
| May 7, 2:57 AM CDT | Tornado Warning | LSX | Audrain, Ralls | 17 min |
| May 7, 2:59 AM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade, Osage | 46 min |
| May 7, 3:06 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike, Warren | 54 min |
| May 7, 3:09 AM CDT | Severe Thunderstorm Warning | LSX | Crawford | 36 min |
| May 7, 3:27 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds, Washington | 63 min |
| May 7, 3:41 AM CDT | Severe Thunderstorm Warning | LSX | Franklin | 49 min |
| May 7, 3:49 AM CDT | Tornado Warning | LSX | Crawford, Franklin, Washington | 26 min |
| May 7, 4:13 AM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois | 47 min |
| May 7, 4:16 AM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Warren | 44 min |
| May 7, 4:20 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds, Washington | 40 min |
| May 7, 4:48 AM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Francois | 42 min |
Nearby
Tornado Warnings in Missouri, 2024Tornado Warnings in Illinois, 2024Every tornado warning in 2024Tornadoes in 2024
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.