Alert archive / Missouri / Tornado Warnings in 2007

Tornado Warning 31, NWS St. Louis, MO

October 18, 2007Madison County, Missouri

NWS St. Louis, MO issued this tornado warning at Oct 18, 2007, 4:40 PM CDT for Madison County, Missouri. It was in force for 35 min. 3 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: Oct 18, 2007, 4:40 PM CDT (21:40 UTC)
Expired: Oct 18, 2007, 5:15 PM CDT
In force: 35 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Madison County, MO

The radar

The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 21:43 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
Oct 18, 4:40 PM CDT	TSTM WND DMG	Fredericktown, MO	MAJOR DAMAGE TO TREES AND POWER LINES IN DEERWOOD ESTATES. RELAYED BY MEDIA.
Oct 18, 4:40 PM CDT	TSTM WND GST 60	1 N Fredericktown, MO	POWER OUTAGES IN FREDERICKTOWN
Oct 18, 4:45 PM CDT	TSTM WND DMG	Fredericktown, MO	WIDESPREAD WIND DAMAGE IN TOWN. 1 FOOT DIAMETER TREES DOWN BLOCKING ROADS AND POWER LINES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 9.7 hours before the alert went out and 290 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 263 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KLSX 182140
TORLSX
MOC123-182215-
/O.NEW.KLSX.TO.W.0031.071018T2140Z-071018T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
440 PM CDT THU OCT 18 2007

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  MADISON COUNTY IN SOUTHEAST MISSOURI

* UNTIL 515 PM CDT

* AT 439 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 5 MILES NORTHEAST OF
  SACO...OR ABOUT 12 MILES SOUTH OF FREDERICKTOWN...MOVING NORTHEAST
  AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FREDERICKTOWN...
  JUNCTION CITY...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

LAT...LON 3743 9053 3764 9033 3763 9014 3734 9018
      3730 9032 3730 9033 3731 9043
TIME...MOT...LOC 2140Z 237DEG 39KT 3741 9036

$$

CARNEY

1 follow-up statement

000 
WWUS53 KLSX 182207
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
507 PM CDT THU OCT 18 2007

MOC123-182217-
/O.EXP.KLSX.TO.W.0031.000000T0000Z-071018T2215Z/
MADISON MO-
507 PM CDT THU OCT 18 2007

...THE TORNADO WARNING FOR MADISON COUNTY EXPIRES AT 515 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 3743 9053 3764 9033 3763 9014 3734 9018
      3730 9032 3730 9033 3731 9043
TIME...MOT...LOC 2207Z 237DEG 39KT 3757 9005

$$

CARNEY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 17, 9:08 PM CDT	River Flood Warning	LSX	Gasconade, Montgomery	25 hr
Oct 17, 11:24 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Cole, Moniteau, Monroe	51 min
Oct 17, 11:55 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Iron, Reynolds, Washington	65 min
Oct 18, 12:02 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Marion, Monroe, Montgomery, Ralls	43 min
Oct 18, 12:27 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	63 min
Oct 18, 12:30 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Marion, Montgomery, Pike, Ralls, Warren	45 min
Oct 18, 12:40 AM CDT	Severe Thunderstorm Warning	LSX	Crawford	32 min
Oct 18, 12:46 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Saint Charles, Warren	44 min
Oct 18, 1:12 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	63 min
Oct 18, 1:14 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, City of Saint Louis	61 min

Nearby

Tornado Warnings in Missouri, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.