Alert archive / Missouri / Tornado Warnings in 2011
Tornado Warning 135, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Jul 7, 2011, 6:47 PM CDT for Jefferson County, Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 28 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
- Jul 7, 2011, 6:47 PM CDT (23:47 UTC)
- Expired
- Jul 7, 2011, 7:15 PM CDT
- In force
- 28 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Jefferson County, MO, Saint Francois County, MO, Sainte Genevieve County, MO
The radar
The St Louis radar (KLSX), 79 km from the middle of the area, began a volume at 23:50 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 |
|---|---|---|---|
| Jul 7, 6:48 PM CDT | TSTM WND DMG | 2 Nw French Village, MO | SEVEN TO EIGHT INCH BLOCKING HIGHWAY D ABOUT ONE TO TWO MILES NORTH OF THE INTERSECTION OF D AND Y. IN ADDITION... SEVERAL TOPS OF TREE LIMBS SNAPPED OFF. |
| Jul 7, 6:52 PM CDT | TSTM WND DMG | 1 W French Village, MO | SIX INCH DIAMETER TREE LIMBS 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 |
|---|---|---|---|
| Jul 7, 5:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.8 hours before the alert went out and 280 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
- 894 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
898 WFUS53 KLSX 072347 TORLSX MOC099-186-187-080015- /O.NEW.KLSX.TO.W.0135.110707T2347Z-110708T0015Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 647 PM CDT THU JUL 7 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI... NORTHWESTERN STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI... NORTHERN ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI... * UNTIL 715 PM CDT * AT 646 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 9 MILES NORTHEAST OF BONNE TERRE...AND MOVING EAST AT 20 MPH. * LOCATIONS IMPACTED INCLUDE... ROCKY RIDGE AND FRENCH VILLAGE. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN EFFECT FOR THE SAME AREA. 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 3812 9025 3793 9020 3792 9052 3808 9055 TIME...MOT...LOC 2347Z 263DEG 18KT 3800 9041 $$ TRUETT
1 follow-up statement
731 WWUS53 KLSX 080001 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 701 PM CDT THU JUL 7 2011 MOC099-186-187-080015- /O.CON.KLSX.TO.W.0135.000000T0000Z-110708T0015Z/ JEFFERSON MO-STE. GENEVIEVE MO-ST. FRANCOIS MO- 701 PM CDT THU JUL 7 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN ST. FRANCOIS... NORTHWESTERN STE. GENEVIEVE AND SOUTHEASTERN JEFFERSON COUNTIES UNTIL 715 PM CDT... AT 656 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 6 MILES WEST OF BLOOMSDALE...OR 13 MILES NORTHEAST OF BONNE TERRE...MOVING EAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... NORTHWEST SECTIONS OF STE GENEVIEVE COUNTY ALONG AND NORTH OF A FRENCH VILLAGE...BLOOMSDALE LINE...INCLUDING INTERSTATE 55 NEAR EXIT 162. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW. && LAT...LON 3793 9038 3810 9042 3812 9025 3793 9020 TIME...MOT...LOC 2358Z 254DEG 22KT 3802 9032 $$ TRUETT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:31 PM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 3 hr |
| Jul 7, 5:24 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Francois, Washington | 24 min |
| Jul 7, 5:46 PM CDT | Areal Flood Advisory | LSX | Franklin, Jefferson, Saint Charles, Saint Louis, City of Saint Louis | 3 hr |
| Jul 7, 5:55 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis, City of Saint Louis | 50 min |
| Jul 7, 6:29 PM CDT | Flash Flood Warning | LSX | Jefferson, Sainte Genevieve, Saint Francois, Saint Louis, Washington | 6 hr |
| Jul 7, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Sainte Genevieve, Saint Francois | 48 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.