Alert archive / Missouri / Tornado Warnings in 2011
Tornado Warning 50, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 22, 2011, 8:21 PM CDT for Jefferson County, Saint Louis County, Missouri; Monroe County, Saint Clair County, Illinois. It was in force for 39 min. 7 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 22, 2011, 8:21 PM CDT (01:21 UTC)
- Expired
- Apr 22, 2011, 9:00 PM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Monroe County, IL, Saint Clair County, IL, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 01:25 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 22, 8:25 PM CDT | HAIL 0.5 | High Ridge, MO | |
| Apr 22, 8:30 PM CDT | HAIL 0.88 | Oakville, MO | |
| Apr 22, 8:42 PM CDT | HAIL 0.75 | Columbia, IL | |
| Apr 22, 8:49 PM CDT | HAIL 0.5 | Waterloo, IL | |
| Apr 22, 8:50 PM CDT | TSTM WND DMG | 1 N Waterloo, IL | TREES DOWN |
| Apr 22, 9:00 PM CDT | TSTM WND DMG | Waterloo, IL | 2 AND 4 INCH LIMBS BLOWN DOWN |
| Apr 22, 9:09 PM CDT | HAIL 0.88 | Smithton, IL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 22, 3:34 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.4 hours before the alert went out and 244 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
- 342 J/kg
- Mixed-layer CIN
- -152 J/kg
- Mixed-layer LCL
- 492 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 351 m²/s²
- 0-3 km storm-relative helicity
- 346 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
396 WFUS53 KLSX 230121 TORLSX ILC133-163-MOC099-189-230200- /O.NEW.KLSX.TO.W.0050.110423T0121Z-110423T0200Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 821 PM CDT FRI APR 22 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... NORTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS... ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS... NORTHEASTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI... SOUTH CENTRAL ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI... * UNTIL 900 PM CDT * AT 816 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR HOUSE SPRINGS...OR NEAR ANTONIA...AND MOVING EAST AT 50 MPH. * LOCATIONS IMPACTED INCLUDE... BARNHART...PEVELY...ARNOLD...OAKVILLE...MEHLVILLE...COLUMBIA... DUPO...WATERLOO...MILLSTADT...BELLEVILLE...SWANSEA...FREEBURG... SHILOH...SCOTT AFB...VALMEYER...FOUNTAIN...NEW DESIGN...SMITHTON... NEW ATHENS AND KIMMSWICK. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW. && LAT...LON 3830 9058 3846 9058 3861 8982 3822 8981 TIME...MOT...LOC 0121Z 267DEG 42KT 3837 9046 $$ BRITT
3 follow-up statements
193 WWUS53 KLSX 230127 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 827 PM CDT FRI APR 22 2011 ILC133-163-MOC099-189-230200- /O.CON.KLSX.TO.W.0050.000000T0000Z-110423T0200Z/ MONROE IL-ST. CLAIR IL-JEFFERSON MO-ST. LOUIS MO- 827 PM CDT FRI APR 22 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL ST. LOUIS... NORTHEASTERN JEFFERSON...ST. CLAIR AND NORTHERN MONROE COUNTIES UNTIL 900 PM CDT... AT 825 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR ANTONIA...MOVING EAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... PEVELY...ARNOLD...MEHLVILLE...OAKVILLE...COLUMBIA...DUPO... WATERLOO...MILLSTADT...FREEBURG...BELLEVILLE...SWANSEA...SHILOH... SCOTT AFB...O'FALLON...VALMEYER...FOUNTAIN...NEW DESIGN... SMITHTON...NEW ATHENS AND KIMMSWICK. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW. && LAT...LON 3830 9055 3849 9045 3861 8982 3822 8981 TIME...MOT...LOC 0128Z 273DEG 32KT 3836 9041 $$ BRITT
942
WWUS53 KLSX 230136
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
836 PM CDT FRI APR 22 2011
MOC099-189-230145-
/O.CAN.KLSX.TO.W.0050.000000T0000Z-110423T0200Z/
JEFFERSON MO-ST. LOUIS MO-
836 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR SOUTH CENTRAL ST. LOUIS AND NORTHEASTERN
JEFFERSON COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3829 9038 3837 9036 3842 9031 3846 9028
3861 8982 3822 8981
TIME...MOT...LOC 0135Z 273DEG 32KT 3836 9033
$$
ILC133-163-230200-
/O.CON.KLSX.TO.W.0050.000000T0000Z-110423T0200Z/
MONROE IL-ST. CLAIR IL-
836 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR ST. CLAIR AND NORTHERN
MONROE COUNTIES UNTIL 900 PM CDT...
AT 833 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. ROTATION IS
INCREASING ON RADAR AND THE TORNADO MAY BE RAIN WRAPPED AND
DIFFICULT TO SEE AT NIGHT. THIS DANGEROUS STORM WAS LOCATED NEAR
BARNHART...MOVING EAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
COLUMBIA...WATERLOO...MILLSTADT...FREEBURG...BELLEVILLE...
SWANSEA...SHILOH...SCOTT AFB...VALMEYER...FOUNTAIN...NEW DESIGN...
SMITHTON...NEW ATHENS...FOSTER POND...NEW HANDOVER...WARTBURG...
BURKSVILLE...BARR...FLORAVILLE AND PADERBORN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 3829 9038 3837 9036 3842 9031 3846 9028
3861 8982 3822 8981
TIME...MOT...LOC 0135Z 273DEG 32KT 3836 9033
$$
BRITT117
WWUS53 KLSX 230144
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
844 PM CDT FRI APR 22 2011
ILC133-163-230200-
/O.CON.KLSX.TO.W.0050.000000T0000Z-110423T0200Z/
MONROE IL-ST. CLAIR IL-
844 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR ST. CLAIR AND NORTHERN
MONROE COUNTIES UNTIL 900 PM CDT...
AT 842 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR FOUNTAIN...OR 5 MILES WEST OF WATERLOO...
MOVING EAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
WATERLOO...MILLSTADT...FREEBURG...BELLEVILLE...SWANSEA...SHILOH...
SCOTT AFB...NEW DESIGN...SMITHTON...NEW ATHENS...WARTBURG...
BURKSVILLE...BARR...FLORAVILLE...PADERBORN...HECKER AND LENZBURG.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 3829 9038 3837 9036 3842 9031 3846 9028
3861 8982 3822 8981
TIME...MOT...LOC 0144Z 273DEG 32KT 3836 9023
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:11 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Saint Charles, Warren | 49 min |
| Apr 22, 7:20 PM CDT | Tornado Warning | LSX | Franklin, Gasconade, Saint Charles | 40 min |
| Apr 22, 7:36 PM CDT | Tornado Warning | LSX | Saint Charles, Saint Louis | 39 min |
| Apr 22, 7:44 PM CDT | Tornado Warning | LSX | Reynolds | 16 min |
| Apr 22, 7:56 PM CDT | Tornado Warning | LSX | Franklin, Jefferson, Saint Louis | 42 min |
| Apr 22, 7:59 PM CDT | Tornado Warning | LSX | Saint Louis, City of Saint Louis | 46 min |
| Apr 22, 9:00 PM CDT | Flash Flood Warning | LSX | Franklin, Jefferson, Saint Louis | 5 hr |
| Apr 22, 10:18 PM CDT | River Flood Warning | LSX | Jefferson | 8 days |
| Apr 22, 10:55 PM CDT | Flash Flood Warning | LSX | Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more | 6 hr |
| Apr 22, 11:10 PM CDT | River Flood Warning | LSX | Lewis | 25 hr |
| Apr 22, 11:12 PM CDT | Tornado Warning | LSX | Iron, Madison, Sainte Genevieve, Saint Francois | 37 min |
| Apr 22, 11:53 PM CDT | River Flood Warning | LSX | Saint Louis, City of Saint Louis | 14 days |
| Apr 23, 1:21 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois | 30 min |
| Apr 23, 1:47 AM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 9 days |
| Apr 23, 4:23 AM CDT | Flash Flood Warning | LSX | Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more | 8 hr |
| Apr 23, 6:45 AM CDT | River Flood Warning | LSX | Lewis | 39 hr |
| Apr 23, 12:29 PM CDT | Flash Flood Warning | LSX | Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more | 6 hr |
| Apr 23, 4:59 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 46 min |
| Apr 23, 5:27 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Washington | 48 min |
| Apr 23, 5:41 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Jefferson, Washington | 33 min |
| Apr 23, 6:22 PM CDT | Flash Flood Warning | LSX | Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more | 6 hr |
| Apr 22, 8:33 PM CDT | Tornado Warning | LSX | Madison, Saint Clair | 42 min |
| Apr 22, 8:48 PM CDT | Tornado Warning | LSX | Monroe, Saint Clair | 57 min |
| Apr 22, 8:55 PM CDT | Tornado Warning | LSX | Bond, Clinton, Fayette, Madison, Saint Clair | 50 min |
| Apr 22, 9:01 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 20 min |
| Apr 22, 9:24 PM CDT | Tornado Warning | LSX | Clinton, Washington | 36 min |
| Apr 22, 9:30 PM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 5 hr |
| Apr 22, 9:41 PM CDT | Tornado Warning | LSX | Bond, Fayette, Marion | 22 min |
| Apr 22, 9:51 PM CDT | Flash Flood Warning | LSX | Clinton, Washington | 5 hr |
| Apr 22, 9:59 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 11 min |
| Apr 22, 10:31 PM CDT | Tornado Warning | LSX | Monroe, Randolph, Saint Clair | 44 min |
| Apr 22, 11:38 PM CDT | River Flood Warning | LSX | Brown | 25 days |
| Apr 22, 11:38 PM CDT | River Flood Warning | LSX | Morgan, Pike | 25 days |
| Apr 22, 11:38 PM CDT | River Flood Warning | LSX | Pike, Scott | 31 days |
Nearby
Tornado Warnings in Missouri, 2011Tornado Warnings in Illinois, 2011Every tornado warning in 2011Tornadoes in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.