Alert archive / Missouri / Tornado Warnings in 2010

Tornado Warning 55, NWS St. Louis, MO

July 18, 2010Madison County, Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this tornado warning at Jul 18, 2010, 10:43 AM CDT for Madison County, Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 25 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: Jul 18, 2010, 10:43 AM CDT (15:43 UTC)
Expired: Jul 18, 2010, 11:08 AM CDT
In force: 25 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Madison County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 130 km from the middle of the area, began a volume at 15:44 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
Jul 18, 6:22 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 3.7 hours before the alert went out and 308 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: 916 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 647 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 34 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.

787 
WFUS53 KLSX 181543
TORLSX
MOC123-186-187-181615-
/O.NEW.KLSX.TO.W.0055.100718T1543Z-100718T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1043 AM CDT SUN JUL 18 2010

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MADISON COUNTY IN SOUTHEAST MISSOURI...
  SOUTH CENTRAL STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
  ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 1115 AM CDT

* AT 1040 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR LIBERTYVILLE...OR 9 MILES NORTH OF 
  FREDERICKTOWN...AND MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WOMAC AND MINE LA MOTTE.

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.

&&

LAT...LON 3767 9036 3777 9022 3768 9010 3765 9014
      3751 9014 3748 9015 3747 9015 3747 9016
TIME...MOT...LOC 1543Z 314DEG 25KT 3768 9026

$$

TRUETT

1 follow-up statement

732 
WWUS53 KLSX 181608
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1108 AM CDT SUN JUL 18 2010

MOC123-186-187-181617-
/O.CAN.KLSX.TO.W.0055.000000T0000Z-100718T1615Z/
MADISON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-
1108 AM CDT SUN JUL 18 2010

...THE TORNADO WARNING FOR SOUTH CENTRAL STE. GENEVIEVE...ST.
FRANCOIS AND NORTHEASTERN MADISON COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE OVER PARTS OF 
MADISON COUNTY...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT 
UNTIL 1PM.

LAT...LON 3767 9036 3777 9022 3768 9010 3765 9014
      3751 9014 3748 9015 3747 9015 3747 9016
TIME...MOT...LOC 1607Z 314DEG 25KT 3756 9011

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 5:23 AM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis, Marion, Monroe, Shelby	52 min
Jul 18, 6:13 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Knox, Lewis, Marion, Monroe and 2 more	47 min
Jul 18, 6:46 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Marion, Monroe, Montgomery and 2 more	44 min
Jul 18, 7:26 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Gasconade, Lincoln, Montgomery, Osage and 2 more	49 min
Jul 18, 7:28 AM CDT	Areal Flood Advisory	LSX	Audrain, Boone, Monroe	4 hr
Jul 18, 7:35 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	55 min
Jul 18, 7:54 AM CDT	Areal Flood Advisory	LSX	Boone	4 hr
Jul 18, 7:57 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Lincoln, Montgomery, Pike, Saint Charles and 2 more	48 min
Jul 18, 8:04 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau	26 min
Jul 18, 8:13 AM CDT	Areal Flood Advisory	LSX	Callaway	4 hr
Jul 18, 8:25 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Gasconade, Osage	50 min
Jul 18, 8:47 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Jefferson, Saint Louis, Washington	43 min
Jul 18, 9:56 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	19 min
Jul 18, 10:13 AM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	32 min
Jul 18, 3:52 PM CDT	Heat Advisory	LSX	Audrain, Boone, Callaway, Cole, Moniteau, Osage	28 hr

Nearby

Tornado Warnings in Missouri, 2010 Every tornado warning in 2010 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.