Alert archive / Missouri / Tornado Warnings in 2010

Tornado Warning 74, NWS St. Louis, MO

November 24, 2010Franklin County, Jefferson County, Washington County, Missouri

NWS St. Louis, MO issued this tornado warning at Nov 24, 2010, 10:31 PM CST for Franklin County, Jefferson County, Washington County, Missouri. It was in force for 44 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
Nov 24, 2010, 10:31 PM CST (04:31 UTC)
Expired
Nov 24, 2010, 11:15 PM CST
In force
44 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), 61 km from the middle of the area, began a volume at 04:31 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

TimeReportWhereRemark
Nov 24, 11:00 PM CSTTSTM WND GST 50Hillsboro, MOPUBLIC REPORT RELAYED BY MEDIA

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.

IssuedProductOfficeLasted
Nov 24, 8:23 PM CSTTornado WatchSPC8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.5 hours before the alert went out and 294 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2010-11-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 542 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2010-11-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 419 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
542 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
419 m²/s²
0-3 km storm-relative helicity
460 m²/s²
Significant tornado parameter
1.7
Supercell composite
6.6

Open this sounding in Storm Lab

The text

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

972 
WFUS53 KLSX 250431
TORLSX
MOC071-099-221-250515-
/O.NEW.KLSX.TO.W.0074.101125T0431Z-101125T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1031 PM CST WED NOV 24 2010

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...
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 1115 PM CST

* AT 1027 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO. THESE
  DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM PARKWAY
  TO ANTHONIES MILL...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CEDAR HILL...HILLSBORO...DE SOTO...ANTONIA...LONEDELL...
  RICHWOODS...DITTMER...GRUBVILLE...OERMANN...FLETCHER...MORSE
  MILL...OTTO AND VICTORIA.

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 3807 9110 3830 9098 3841 9043 3813 9054
      3805 9110
TIME...MOT...LOC 0431Z 261DEG 32KT 3829 9090 3807 9100

$$

TRUETT
1 follow-up statement
248 
WWUS53 KLSX 250453
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1053 PM CST WED NOV 24 2010

MOC071-250503-
/O.CAN.KLSX.TO.W.0074.000000T0000Z-101125T0515Z/
FRANKLIN MO-
1053 PM CST WED NOV 24 2010

...THE TORNADO WARNING FOR SOUTHEASTERN FRANKLIN COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED ACROSS  
THIS AREA.  HOWEVER...A TORNADO WATCH REMAINS IN EFFECT UNTIL 4 AM.


LAT...LON 3809 9083 3836 9067 3841 9043 3813 9054
TIME...MOT...LOC 0453Z 261DEG 32KT 3835 9060 3813 9070

$$

MOC099-221-250515-
/O.CON.KLSX.TO.W.0074.000000T0000Z-101125T0515Z/
WASHINGTON MO-JEFFERSON MO-
1053 PM CST WED NOV 24 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL JEFFERSON AND
NORTHEASTERN WASHINGTON COUNTIES UNTIL 1115 PM CST...

AT 1048 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO.  THESE
DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM CEDAR HILL
TO 5 MILES SOUTHEAST OF RICHWOODS...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  HILLSBORO...ANTONIA...DE SOTO...OTTO AND VICTORIA.

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 3809 9083 3836 9067 3841 9043 3813 9054
TIME...MOT...LOC 0453Z 261DEG 32KT 3835 9060 3813 9070

$$

TRUETT

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 24, 7:26 PM CSTSevere Thunderstorm WarningLSXFranklin, Gasconade, Osage34 min
Nov 24, 9:06 PM CSTSevere Thunderstorm WarningLSXSaint Louis24 min
Nov 24, 9:26 PM CSTAreal Flood AdvisoryLSXCrawford, Franklin, Gasconade, Jefferson, Osage, Saint Charles and 4 more6 hr
Nov 24, 9:39 PM CSTTornado WarningLSXCrawford, Franklin, Washington51 min
Nov 24, 10:25 PM CSTTornado WarningLSXCrawford, Washington50 min
Nov 24, 11:03 PM CSTTornado WarningLSXJefferson, Sainte Genevieve, Saint Francois, Washington42 min
Nov 24, 11:46 PM CSTTornado WarningLSXSainte Genevieve, Saint Francois44 min
Nov 25, 3:31 AM CSTAreal Flood AdvisoryLSXCrawford, Franklin, Gasconade, Jefferson, Osage, Saint Charles and 4 more6 hr
Nov 25, 2:45 PM CSTRiver Flood WarningLSXOsage5 hr

Nearby

Tornado Warnings in Missouri, 2010Every tornado warning in 2010Tornadoes in 2010

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.