Alert archive / Missouri / Tornado Warnings in 2011
Tornado Warning 32, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 19, 2011, 7:39 PM CDT for Franklin County, Jefferson County, Washington County, Missouri. It was in force for 33 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 19, 2011, 7:39 PM CDT (00:39 UTC)
- Expired
- Apr 19, 2011, 8:12 PM CDT
- In force
- 33 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Franklin County, MO, Jefferson County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 56 km from the middle of the area, began a volume at 00:40 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 19, 7:53 PM CDT | TSTM WND GST 75 | Festus, MO | |
| Apr 19, 7:53 PM CDT | HAIL 0.7 | Festus, 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 19, 1:00 PM CDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.7 hours before the alert went out and 283 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
- 2409 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 523 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 370 m²/s²
- 0-3 km storm-relative helicity
- 547 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 24.4
The text
As transmitted, in the capitals the NWS used until 2016.
911 WFUS53 KLSX 200039 TORLSX MOC071-099-221-200130- /O.NEW.KLSX.TO.W.0032.110420T0039Z-110420T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 739 PM CDT TUE APR 19 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI... CENTRAL JEFFERSON COUNTY IN EAST CENTRAL MISSOURI... NORTHEASTERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI... * UNTIL 830 PM CDT * AT 736 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR RICHWOODS...OR 14 MILES EAST OF ANTHONIES MILL...AND MOVING EAST AT 50 MPH. * LOCATIONS IMPACTED INCLUDE... DE SOTO...HILLSBORO...FESTUS...CRYSTAL CITY...HERCULANEUM... PEVELY...OLYMPIAN VILLAGE...FLETCHER...MORSE MILL...VICTORIA... HEMATITE AND MAPAVILLE. 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 3823 9094 3835 9041 3811 9031 3805 9089 TIME...MOT...LOC 0039Z 249DEG 44KT 3816 9080 $$ GLASS
3 follow-up statements
000
WWUS53 KLSX 200047
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
747 PM CDT TUE APR 19 2011
MOC071-200057-
/O.CAN.KLSX.TO.W.0032.000000T0000Z-110420T0130Z/
FRANKLIN MO-
747 PM CDT TUE APR 19 2011
...THE TORNADO WARNING FOR SOUTHEASTERN FRANKLIN COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3807 9072 3821 9079 3822 9078 3835 9041
3811 9031
TIME...MOT...LOC 0047Z 249DEG 44KT 3816 9066
$$
MOC099-221-200130-
/O.CON.KLSX.TO.W.0032.000000T0000Z-110420T0130Z/
WASHINGTON MO-JEFFERSON MO-
747 PM CDT TUE APR 19 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL JEFFERSON AND
NORTHEASTERN WASHINGTON COUNTIES UNTIL 830 PM CDT...
AT 744 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 7 MILES EAST OF RICHWOODS...OR 8 MILES WEST OF DE
SOTO...MOVING EAST AT 50 MPH.
LOCATIONS IMPACTED INCLUDE...
DE SOTO...HILLSBORO...FESTUS...CRYSTAL CITY...HERCULANEUM...
PEVELY...BARNHART...OLYMPIAN VILLAGE...VICTORIA...HEMATITE AND
MAPAVILLE.
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 3807 9072 3821 9079 3822 9078 3835 9041
3811 9031
TIME...MOT...LOC 0047Z 249DEG 44KT 3816 9066
$$
GLASS711
WWUS53 KLSX 200101
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
801 PM CDT TUE APR 19 2011
MOC221-200111-
/O.CAN.KLSX.TO.W.0032.000000T0000Z-110420T0130Z/
WASHINGTON MO-
801 PM CDT TUE APR 19 2011
...THE TORNADO WARNING FOR NORTHEASTERN WASHINGTON COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3817 9058 3829 9059 3835 9041 3811 9031
3809 9054
TIME...MOT...LOC 0101Z 251DEG 52KT 3819 9043
$$
MOC099-200130-
/O.CON.KLSX.TO.W.0032.000000T0000Z-110420T0130Z/
JEFFERSON MO-
801 PM CDT TUE APR 19 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL JEFFERSON COUNTY
UNTIL 830 PM CDT...
AT 757 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR OLYMPIAN VILLAGE...OR NEAR DE SOTO...MOVING
EAST AT 60 MPH.
LOCATIONS IMPACTED INCLUDE...
FESTUS...CRYSTAL CITY...HERCULANEUM AND PEVELY.
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 3817 9058 3829 9059 3835 9041 3811 9031
3809 9054
TIME...MOT...LOC 0101Z 251DEG 52KT 3819 9043
$$
GLASS014
WWUS53 KLSX 200112
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
812 PM CDT TUE APR 19 2011
MOC099-200122-
/O.CAN.KLSX.TO.W.0032.000000T0000Z-110420T0130Z/
JEFFERSON MO-
812 PM CDT TUE APR 19 2011
...THE TORNADO WARNING FOR CENTRAL JEFFERSON COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 900 PM.
LAT...LON 3817 9058 3829 9059 3835 9041 3811 9031
3809 9054
TIME...MOT...LOC 0112Z 251DEG 52KT 3824 9024
$$
GLASSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 7:03 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Washington | 42 min |
| Apr 19, 7:05 PM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 5 hr |
| Apr 19, 7:17 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison | 28 min |
| Apr 19, 7:18 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis | 42 min |
| Apr 19, 7:25 PM CDT | Tornado Warning | LSX | Iron, Madison, Saint Francois | 40 min |
| Apr 19, 7:29 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison, Sainte Genevieve, Saint Francois | 46 min |
| Apr 19, 7:30 PM CDT | Tornado Warning | LSX | Saint Louis, City of Saint Louis | 45 min |
| Apr 19, 7:34 PM CDT | Tornado Warning | LSX | Madison, Sainte Genevieve, Saint Francois | 41 min |
| Apr 19, 7:37 PM CDT | Tornado Warning | LSX | Jefferson, Saint Louis | 36 min |
| Apr 19, 7:48 PM CDT | Tornado Warning | LSX | Madison | 27 min |
| Apr 19, 7:54 PM CDT | Tornado Warning | LSX | Sainte Genevieve | 36 min |
| Apr 19, 9:37 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 21 min |
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.