Alert archive / Missouri / Tornado Warnings in 2011
Tornado Warning 122, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Jun 18, 2011, 4:56 AM CDT for 4 counties in Missouri. It was in force for 49 min. 1 report 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
- Jun 18, 2011, 4:56 AM CDT (09:56 UTC)
- Expired
- Jun 18, 2011, 5:45 AM CDT
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Lincoln County, MO, Montgomery County, MO, Saint Charles County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 38 km from the middle of the area, began a volume at 09:57 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 |
|---|---|---|---|
| Jun 18, 5:34 AM CDT | TSTM WND DMG | Flint Hill, MO | A COUPLE OF THREE INCH TREE LIMBS BLOWN DOWN. |
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 |
|---|---|---|---|
| Jun 18, 2:44 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 9.9 hours before the alert went out and 242 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
- 601 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 644 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
521
WFUS53 KLSX 180956
TORLSX
MOC113-139-183-219-181045-
/O.NEW.KLSX.TO.W.0122.110618T0956Z-110618T1045Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
456 AM CDT SAT JUN 18 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...
NORTHWESTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
NORTHERN WARREN COUNTY IN EAST CENTRAL MISSOURI...
* UNTIL 545 AM CDT
* AT 453 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING BRIEF RAIN-WRAPPED
TORNADOES IN ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE. THIS
DANGEROUS STORM WAS LOCATED NEAR JONESBURG...OR 9 MILES SOUTHEAST
OF MONTGOMERY CITY...AND MOVING EAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
WRIGHT CITY...TROY...WENTZVILLE...ST. PAUL...HAWK POINT...MOSCOW
MILLS...WINFIELD...TRUXTON...CAVE...FORISTELL...FLINT HILL...OLD
MONROE AND FOLEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3910 9076 3897 9072 3879 9072 3885 9142
3897 9142
TIME...MOT...LOC 0956Z 270DEG 38KT 3891 9131
$$
CVKING3 follow-up statements
322
WWUS53 KLSX 181001
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
501 AM CDT SAT JUN 18 2011
MOC113-139-183-219-181045-
/O.CON.KLSX.TO.W.0122.000000T0000Z-110618T1045Z/
LINCOLN MO-MONTGOMERY MO-ST. CHARLES MO-WARREN MO-
501 AM CDT SAT JUN 18 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN WARREN...
NORTHWESTERN ST. CHARLES...MONTGOMERY AND SOUTHERN LINCOLN COUNTIES
UNTIL 545 AM CDT...
AT 457 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES. THIS DANGEROUS STORM WAS LOCATED
NEAR JONESBURG...OR 10 MILES NORTHWEST OF WARRENTON...MOVING EAST AT
45 MPH.
A TRACTOR TRAILER WAS BLOWN OVER ON INTERSTATE 70 NEAR NEW FLORENCE.
THIS MAY HAVE BEEN DUE TO A BRIEF TORNADO. TAKE SHELTER IMMEDIATELY!
LOCATIONS IMPACTED INCLUDE...
TROY...WENTZVILLE...ST. PAUL...HAWK POINT...MOSCOW MILLS...
WINFIELD...CAVE...FLINT HILL AND OLD MONROE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 3886 9132 3895 9133 3910 9076 3897 9072
3879 9072
TIME...MOT...LOC 1001Z 270DEG 38KT 3891 9124
$$
CVKING280
WWUS53 KLSX 181011
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
511 AM CDT SAT JUN 18 2011
MOC139-181020-
/O.CAN.KLSX.TO.W.0122.000000T0000Z-110618T1045Z/
MONTGOMERY MO-
511 AM CDT SAT JUN 18 2011
...THE TORNADO WARNING FOR MONTGOMERY COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED EAST OF THE WARNED
AREA.
LAT...LON 3884 9117 3899 9119 3910 9076 3897 9072
3879 9072
TIME...MOT...LOC 1010Z 270DEG 38KT 3891 9111
$$
MOC113-183-219-181045-
/O.CON.KLSX.TO.W.0122.000000T0000Z-110618T1045Z/
LINCOLN MO-ST. CHARLES MO-WARREN MO-
511 AM CDT SAT JUN 18 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN WARREN...
NORTHWESTERN ST. CHARLES AND SOUTHERN LINCOLN COUNTIES UNTIL 545 AM
CDT...
AT 506 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES. THE POSSIBLE TORNADO WAS LOCATED
NEAR HAWK POINT...OR 6 MILES NORTH OF WARRENTON...MOVING EAST AT 45
MPH.
LOCATIONS IMPACTED INCLUDE...
TROY...WENTZVILLE...ST. PAUL...MOSCOW MILLS...WINFIELD...CAVE...
FLINT HILL AND OLD MONROE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT.
TAKE COVER NOW.
&&
LAT...LON 3884 9117 3899 9119 3910 9076 3897 9072
3879 9072
TIME...MOT...LOC 1010Z 270DEG 38KT 3891 9111
$$
CVKING446
WWUS53 KLSX 181018
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
518 AM CDT SAT JUN 18 2011
MOC113-183-219-181045-
/O.CON.KLSX.TO.W.0122.000000T0000Z-110618T1045Z/
LINCOLN MO-ST. CHARLES MO-WARREN MO-
518 AM CDT SAT JUN 18 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL WARREN...
NORTHWESTERN ST. CHARLES AND SOUTHERN LINCOLN COUNTIES UNTIL 545 AM
CDT...
AT 515 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES. THIS POSSIBLE TORNADO WAS
LOCATED NEAR WRIGHT CITY...MOVING EAST AT 50 MPH.
LOCATIONS IMPACTED INCLUDE...
WENTZVILLE...ST. PAUL...MOSCOW MILLS...WINFIELD...FLINT HILL AND
OLD MONROE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT.
TAKE COVER NOW.
&&
LAT...LON 3882 9103 3901 9110 3910 9076 3897 9072
3879 9072
TIME...MOT...LOC 1018Z 270DEG 43KT 3890 9097
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 3:12 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Cole, Moniteau, Osage | 63 min |
| Jun 18, 4:00 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway, Cole, Gasconade, Montgomery, Osage | 45 min |
| Jun 18, 4:30 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway, Franklin, Gasconade, Lincoln, Montgomery and 4 more | 60 min |
| Jun 18, 5:07 AM CDT | Tornado Warning | LSX | Lincoln, Montgomery, Pike | 38 min |
| Jun 18, 5:10 AM CDT | Severe Thunderstorm Warning | LSX | Marion, Pike, Ralls | 65 min |
| Jun 18, 5:18 AM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Lincoln, Pike, Saint Charles, Saint Louis and 2 more | 57 min |
| Jun 18, 5:30 AM CDT | Tornado Warning | LSX | Lincoln, Pike, Saint Charles | 19 min |
| Jun 18, 5:50 AM CDT | Areal Flood Advisory | LSX | Saint Charles, Saint Louis, City of Saint Louis | 3 hr |
| Jun 18, 6:09 AM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 51 min |
| Jun 18, 7:28 AM CDT | Severe Thunderstorm Warning | LSX | Madison | 16 min |
| Jun 18, 3:57 PM CDT | Flash Flood Watch | LSX | Audrain, Boone, Callaway, Cole, Crawford, Franklin and 17 more | 15 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.