Alert archive / Missouri / Tornado Warnings in 2009

Tornado Warning 53, NWS St. Louis, MO

July 4, 2009Sainte Genevieve County, Missouri

NWS St. Louis, MO issued this tornado warning at Jul 4, 2009, 8:06 PM CDT for Sainte Genevieve County, Missouri. It was in force for 24 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: Jul 4, 2009, 8:06 PM CDT (01:06 UTC)
Expired: Jul 4, 2009, 8:30 PM CDT
In force: 24 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 105 km from the middle of the area, began a volume at 01:09 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 4, 8:35 PM CDT	FUNNEL CLOUD	St. Mary, MO	SPOTTER REPORTED A FUNNEL CLOUD MOVING UP AND DOWN FROM THE CLOUD BASE...AND NEVER SAW IT TOUCH DOWN

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

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.1 hours before the alert went out and 282 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLSX 050106
TORLSX
MOC186-050130-
/O.NEW.KLSX.TO.W.0053.090705T0106Z-090705T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
806 PM CDT SAT JUL 4 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 830 PM CDT

* AT 806 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO NEAR ROCKY
  RIDGE...OR 8 MILES SOUTHWEST OF STE. GENEVIEVE. DOPPLER RADAR
  SHOWED THIS TORNADO MOVING SOUTHEAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WEINGARTEN...ST. MARY...RIVER AUX VASES AND MINNITH.

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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3792 9025 3799 9016 3792 8998 3791 8998
      3788 8994 3787 8994 3783 9000 3772 9008
TIME...MOT...LOC 0107Z 308DEG 11KT 3792 9018

$$

TES

1 follow-up statement

000 
WWUS53 KLSX 050134
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
834 PM CDT SAT JUL 4 2009

MOC186-050145-
/O.EXP.KLSX.TO.W.0053.000000T0000Z-090705T0130Z/
STE. GENEVIEVE MO-
834 PM CDT SAT JUL 4 2009

...THE TORNADO WARNING FOR SOUTHEASTERN STE. GENEVIEVE COUNTY EXPIRES
AT 830 PM CDT...

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

LAT...LON 3792 9025 3799 9016 3792 8998 3791 8998
      3788 8994 3787 8994 3783 9000 3772 9008
TIME...MOT...LOC 0106Z 308DEG 11KT 3792 9018

$$

TES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 8:22 PM CDT	River Flood Warning	LSX	Gasconade, Montgomery	23 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.