Alert archive / Missouri / Tornado Warnings in 2011
Tornado Warning 57, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 22, 2011, 11:12 PM CDT for 4 counties in 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
- Apr 22, 2011, 11:12 PM CDT (04:12 UTC)
- Expired
- Apr 22, 2011, 11:49 PM CDT
- In force
- 37 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Iron County, MO, Madison County, MO, Saint Francois County, MO, Sainte Genevieve County, MO
The radar
The St Louis radar (KLSX), 122 km from the middle of the area, began a volume at 04:14 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 |
|---|---|---|---|
| Apr 22, 5:49 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 4.2 hours before the alert went out and 314 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
- 1313 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 1542 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
894
WFUS53 KLSX 230412
TORLSX
MOC093-123-186-187-230500-
/O.NEW.KLSX.TO.W.0057.110423T0412Z-110423T0500Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1112 PM CDT FRI APR 22 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
IRON COUNTY IN SOUTHEAST MISSOURI...
NORTHERN MADISON COUNTY IN SOUTHEAST MISSOURI...
SOUTH CENTRAL STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
* UNTIL MIDNIGHT CDT
* AT 1111 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR ROSELLE...OR 5 MILES EAST OF IRONTON...AND
MOVING EAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
FREDERICKTOWN...KNOB LICK...JUNCTION CITY...WOMAC...CATHERINE
PLACE...MINE LA MOTTE AND LIBERTYVILLE.
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 3752 9064 3768 9067 3777 9004 3775 9005
3768 9011 3765 9014 3755 9014
TIME...MOT...LOC 0412Z 260DEG 35KT 3761 9053
$$
KANOFSKY4 follow-up statements
644
WWUS53 KLSX 230418
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1118 PM CDT FRI APR 22 2011
MOC093-230428-
/O.CAN.KLSX.TO.W.0057.000000T0000Z-110423T0500Z/
IRON MO-
1118 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR IRON COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3764 9054 3764 9056 3770 9055 3777 9005
3775 9005 3765 9014 3758 9015 3755 9055
TIME...MOT...LOC 0418Z 260DEG 35KT 3762 9046
$$
MOC123-186-187-230500-
/O.CON.KLSX.TO.W.0057.000000T0000Z-110423T0500Z/
MADISON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-
1118 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL STE.
GENEVIEVE...ST. FRANCOIS AND NORTHERN MADISON COUNTIES UNTIL MIDNIGHT
CDT...
AT 1114 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR ROSELLE...OR 7 MILES EAST OF IRONTON...MOVING
EAST AT 40 MPH.
LOCATIONS IMPACTED INCLUDE...
KNOB LICK...JUNCTION CITY...WOMAC...CATHERINE PLACE...MINE LA MOTTE
AND LIBERTYVILLE.
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 3764 9054 3764 9056 3770 9055 3777 9005
3775 9005 3765 9014 3758 9015 3755 9055
TIME...MOT...LOC 0418Z 260DEG 35KT 3762 9046
$$
KANOFSKY084
WWUS53 KLSX 230428
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1128 PM CDT FRI APR 22 2011
MOC123-230438-
/O.CAN.KLSX.TO.W.0057.000000T0000Z-110423T0500Z/
MADISON MO-
1128 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR NORTHERN MADISON COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3765 9041 3772 9042 3777 9005 3775 9005
3764 9015 3764 9037
TIME...MOT...LOC 0428Z 260DEG 35KT 3764 9034
$$
MOC186-187-230500-
/O.CON.KLSX.TO.W.0057.000000T0000Z-110423T0500Z/
ST. FRANCOIS MO-STE. GENEVIEVE MO-
1128 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL STE.
GENEVIEVE AND ST. FRANCOIS COUNTIES UNTIL MIDNIGHT CDT...
AT 1125 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR KNOB LICK...OR 6 MILES NORTHWEST OF
FREDERICKTOWN...MOVING EAST AT 40 MPH.
LOCATIONS IMPACTED INCLUDE...
WOMAC AND LIBERTYVILLE.
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 3765 9041 3772 9042 3777 9005 3775 9005
3764 9015 3764 9037
TIME...MOT...LOC 0428Z 260DEG 35KT 3764 9034
$$
KANOFSKY250
WWUS53 KLSX 230443
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1143 PM CDT FRI APR 22 2011
MOC187-230453-
/O.CAN.KLSX.TO.W.0057.000000T0000Z-110423T0500Z/
ST. FRANCOIS MO-
1143 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR ST. FRANCOIS COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3770 9016 3768 9020 3768 9021 3775 9022
3777 9010 3777 9005 3775 9005 3767 9012
TIME...MOT...LOC 0443Z 250DEG 35KT 3773 9012
$$
MOC186-230500-
/O.CON.KLSX.TO.W.0057.000000T0000Z-110423T0500Z/
STE. GENEVIEVE MO-
1143 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL STE.
GENEVIEVE COUNTY UNTIL MIDNIGHT CDT...
AT 1140 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR WOMAC...OR 13 MILES NORTHEAST OF
FREDERICKTOWN...MOVING EAST AT 40 MPH.
LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF SOUTHEASTERN STE. GENEVIEVE COUNTY.
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 3770 9016 3768 9020 3768 9021 3775 9022
3777 9010 3777 9005 3775 9005 3767 9012
TIME...MOT...LOC 0443Z 250DEG 35KT 3773 9012
$$
KANOFSKY976
WWUS53 KLSX 230449
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1149 PM CDT FRI APR 22 2011
MOC186-230459-
/O.CAN.KLSX.TO.W.0057.000000T0000Z-110423T0500Z/
STE. GENEVIEVE MO-
1149 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR SOUTH CENTRAL STE. GENEVIEVE COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 1 AM.
LAT...LON 3770 9016 3768 9020 3768 9021 3775 9022
3777 9010 3777 9005 3775 9005 3767 9012
TIME...MOT...LOC 0449Z 250DEG 35KT 3775 9005
$$
KANOFSKYThe 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, 8:21 PM CDT | Tornado Warning | LSX | Jefferson, Saint Louis | 39 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, 11:53 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 |
Nearby
Tornado Warnings in Missouri, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.