Alert archive / Missouri / Tornado Warnings in 2011
Tornado Warning 48, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 22, 2011, 7:56 PM CDT for Franklin County, Jefferson County, Saint Louis County, Missouri. It was in force for 42 min. 2 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, 7:56 PM CDT (00:56 UTC)
- Expired
- Apr 22, 2011, 8:38 PM CDT
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Franklin County, MO, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 30 km from the middle of the area, began a volume at 00:59 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, 8:04 PM CDT | FUNNEL CLOUD | Lonedell, MO | CROSSED OVER HIGHWAY N TOWARDS HIGHWAY 30 AND CEDER HILL |
| Apr 22, 8:25 PM CDT | HAIL 0.5 | High Ridge, MO |
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, 0.9 hours before the alert went out and 263 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.
867
WFUS53 KLSX 230056
TORLSX
MOC071-099-189-230145-
/O.NEW.KLSX.TO.W.0048.110423T0056Z-110423T0145Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
756 PM CDT FRI APR 22 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
EASTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
SOUTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 845 PM CDT
* AT 755 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO 5 MILES
SOUTHWEST OF PACIFIC...NEAR LONEDELL. DOPPLER RADAR SHOWED THIS
TORNADO MOVING EAST AT 50 MPH.
* LOCATIONS IMPACTED INCLUDE...
PACIFIC...CEDAR HILL...EUREKA...BYRNES MILL...HIGH RIDGE...
ANTONIA...MURPHY...VALLEY PARK...FENTON...BARNHART...SUNSET
HILLS...ARNOLD...CRESTWOOD...OAKLAND...LAKESHIRE...DITTMER...HOUSE
SPRINGS...OERMANN...SCOTSDALE AND PARKDALE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPEAT...A TORNADO IS ON THE GROUND. 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.
&&
LAT...LON 3829 9091 3857 9085 3858 9082 3858 9032
3829 9039
TIME...MOT...LOC 0056Z 260DEG 42KT 3841 9078
$$
GLASS3 follow-up statements
116
WWUS53 KLSX 230105
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
805 PM CDT FRI APR 22 2011
MOC071-099-189-230145-
/O.CON.KLSX.TO.W.0048.000000T0000Z-110423T0145Z/
JEFFERSON MO-FRANKLIN MO-ST. LOUIS MO-
805 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN ST. LOUIS...EAST
CENTRAL FRANKLIN AND NORTHERN JEFFERSON COUNTIES UNTIL 845 PM CDT...
AT 803 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR DITTMER...OR NEAR CEDAR HILL...MOVING EAST AT
50 MPH.
LOCATIONS IMPACTED INCLUDE...
CEDAR HILL...EUREKA...BYRNES MILL...HIGH RIDGE...ANTONIA...
MURPHY...VALLEY PARK...FENTON...BARNHART...SUNSET HILLS...ARNOLD...
CRESTWOOD...OAKLAND...LAKESHIRE...HOUSE SPRINGS...SCOTSDALE...
PARKDALE...OTTO AND PEERLESS PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 3831 9079 3847 9078 3858 9076 3858 9032
3829 9039
TIME...MOT...LOC 0105Z 260DEG 42KT 3837 9069
$$
GLASS695
WWUS53 KLSX 230113
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
813 PM CDT FRI APR 22 2011
MOC071-099-189-230145-
/O.CON.KLSX.TO.W.0048.000000T0000Z-110423T0145Z/
JEFFERSON MO-FRANKLIN MO-ST. LOUIS MO-
813 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN ST. LOUIS...EAST
CENTRAL FRANKLIN AND NORTHERN JEFFERSON COUNTIES UNTIL 845 PM CDT...
AT 812 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR CEDAR HILL...MOVING EAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
BYRNES MILL...HIGH RIDGE...ANTONIA...MURPHY...VALLEY PARK...
FENTON...BARNHART...SUNSET HILLS...ARNOLD...CRESTWOOD...OAKLAND...
LAKESHIRE...AFFTON...HOUSE SPRINGS...PARKDALE...OTTO AND PEERLESS
PARK.
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 3831 9079 3847 9078 3858 9076 3858 9032
3829 9039
TIME...MOT...LOC 0113Z 263DEG 40KT 3837 9059
$$
BRITT674
WWUS53 KLSX 230138
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
838 PM CDT FRI APR 22 2011
MOC071-099-189-230148-
/O.CAN.KLSX.TO.W.0048.000000T0000Z-110423T0145Z/
JEFFERSON MO-FRANKLIN MO-ST. LOUIS MO-
838 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR SOUTHERN ST. LOUIS...EAST CENTRAL FRANKLIN
AND NORTHERN JEFFERSON COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 10 PM CDT.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.
LAT...LON 3831 9079 3847 9078 3858 9076 3858 9032
3829 9039
TIME...MOT...LOC 0138Z 263DEG 40KT 3840 9024
$$
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, 7:59 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, 11:12 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 |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.