Alert archive / Missouri / Tornado Warnings in 2009

Tornado Warning 43, NWS St. Louis, MO

June 10, 2009Moniteau County, Missouri

NWS St. Louis, MO issued this tornado warning at Jun 10, 2009, 7:47 PM CDT for Moniteau County, Missouri. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 10, 2009, 7:47 PM CDT (00:47 UTC)
Expired: Jun 10, 2009, 8:08 PM CDT
In force: 21 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Moniteau County, MO

The radar

The Pleasant Hill radar (KEAX), 135 km from the middle of the area, began a volume at 00:50 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.

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 10, 5:15 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.8 hours before the alert went out and 217 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: 3767 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 110047
TORLSX
MOC135-110130-
/O.NEW.KLSX.TO.W.0043.090611T0047Z-090611T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
747 PM CDT WED JUN 10 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN MONITEAU COUNTY IN CENTRAL MISSOURI...

* UNTIL 830 PM CDT

* AT 748 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR TIPTON...AND MOVING EAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TIPTON...CALIFORNIA...CLARKSBURG AND LATHAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. IF IN MOBILE HOMES
OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF
NO SHELTER IS AVAILABLE... LIE FLAT IN THE NEAREST DITCH OR OTHER LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

&&

LAT...LON 3869 9284 3869 9265 3869 9263 3874 9260
      3874 9253 3849 9261 3853 9276 3860 9285
      3867 9285
TIME...MOT...LOC 0048Z 271DEG 10KT 3866 9284

$$

CARNEY

1 follow-up statement

000 
WWUS53 KLSX 110108
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
808 PM CDT WED JUN 10 2009

MOC135-110118-
/O.CAN.KLSX.TO.W.0043.000000T0000Z-090611T0130Z/
MONITEAU MO-
808 PM CDT WED JUN 10 2009

...THE TORNADO WARNING FOR WESTERN MONITEAU COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER
APPEARED TO BE SEVERE.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 100 AM.

LAT...LON 3869 9284 3869 9265 3869 9263 3874 9260
      3874 9253 3849 9261 3853 9276 3860 9285
      3867 9285
TIME...MOT...LOC 0108Z 271DEG 10KT 3866 9277

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:07 PM CDT	Tornado Warning	LSX	Cole, Moniteau	38 min
Jun 10, 7:07 PM CDT	Tornado Warning	LSX	Crawford	23 min
Jun 10, 7:35 PM CDT	Tornado Warning	LSX	Crawford	40 min
Jun 10, 7:37 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	38 min
Jun 10, 7:43 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	47 min
Jun 10, 8:06 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Osage, Warren	24 min
Jun 10, 8:07 PM CDT	Flash Flood Warning	LSX	Cole, Crawford, Gasconade, Moniteau, Osage	6 hr
Jun 10, 8:11 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	49 min
Jun 10, 8:27 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	37 min
Jun 10, 8:43 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	34 min
Jun 10, 8:44 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage, Warren	22 min
Jun 10, 8:49 PM CDT	Flash Flood Warning	LSX	Franklin, Jefferson, Saint Louis, Washington, City of Saint Louis	6 hr
Jun 11, 6:36 AM CDT	River Flood Warning	LSX	Osage	7 hr
Jun 11, 10:02 AM CDT	River Flood Warning	LSX	Callaway, Osage	71 hr
Jun 11, 10:02 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	4 days
Jun 11, 10:11 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	71 hr

Nearby

Tornado Warnings in Missouri, 2009 Every tornado warning in 2009 Tornadoes in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.