Alert archive / Missouri / Tornado Warnings in 2011

Tornado Warning 65, NWS St. Louis, MO

May 22, 2011Callaway County, Montgomery County, Missouri

NWS St. Louis, MO issued this tornado warning at May 22, 2011, 6:23 PM CDT for Callaway County, Montgomery County, Missouri. It was in force for 12 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: May 22, 2011, 6:23 PM CDT (23:23 UTC)
Expired: May 22, 2011, 6:35 PM CDT
In force: 12 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Callaway County, MO, Montgomery County, MO

The radar

The St Louis radar (KLSX), 89 km from the middle of the area, began a volume at 23:26 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
May 22, 12:51 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.4 hours before the alert went out and 286 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: 2645 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 678 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 424 m²/s²
0-3 km storm-relative helicity: 422 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 16.9

Open this sounding in Storm Lab

The text

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

966 
WFUS53 KLSX 222323
TORLSX
MOC027-139-230000-
/O.NEW.KLSX.TO.W.0065.110522T2323Z-110523T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
623 PM CDT SUN MAY 22 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CALLAWAY COUNTY IN CENTRAL MISSOURI...
  MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 700 PM CDT

* AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES NORTH OF CHAMOIS...OR 12 MILES SOUTHEAST
  OF FULTON...AND MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WILLIAMSBURG...MINEOLA AND DANVILLE.

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 3903 9167 3896 9149 3871 9171 3871 9174
      3874 9186
TIME...MOT...LOC 2323Z 205DEG 17KT 3877 9175

$$

CARNEY

1 follow-up statement

213 
WWUS53 KLSX 222335
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
635 PM CDT SUN MAY 22 2011

MOC027-139-222346-
/O.CAN.KLSX.TO.W.0065.000000T0000Z-110523T0000Z/
CALLAWAY MO-MONTGOMERY MO-
635 PM CDT SUN MAY 22 2011

...THE TORNADO WARNING FOR MONTGOMERY AND EAST CENTRAL CALLAWAY
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.
 HOWEVER SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE
WITH THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 900 PM.

LAT...LON 3903 9167 3896 9149 3871 9171 3871 9174
      3874 9186
TIME...MOT...LOC 2336Z 205DEG 17KT 3883 9172

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 9:26 PM CDT	River Flood Warning	LSX	Saint Charles	55 days
May 21, 10:55 PM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	3 days
May 22, 3:15 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	45 min
May 22, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	46 min
May 22, 4:15 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	45 min
May 22, 4:32 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Warren	58 min
May 22, 4:35 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	55 min
May 22, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Warren	45 min
May 22, 5:02 PM CDT	Tornado Warning	LSX	Franklin, Warren	45 min
May 22, 5:15 PM CDT	Severe Thunderstorm Warning	LSX	Boone	45 min
May 22, 5:20 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Moniteau, Osage	40 min
May 22, 5:21 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	54 min
May 22, 5:27 PM CDT	Tornado Warning	LSX	Callaway, Montgomery	48 min
May 22, 5:37 PM CDT	Tornado Warning	LSX	Saint Charles	38 min
May 22, 5:54 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Gasconade, Montgomery, Osage	51 min
May 22, 5:57 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Montgomery	48 min
May 22, 6:08 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage, Warren	36 min
May 22, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike	48 min
May 22, 6:12 PM CDT	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Pike, Ralls	33 min
May 22, 6:28 PM CDT	Tornado Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	47 min
May 22, 6:47 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery, Pike	58 min
May 22, 6:54 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	39 min
May 22, 6:58 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Franklin, Gasconade, Montgomery, Osage and 1 more	47 min

Nearby

Tornado Warnings in Missouri, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.