Alert archive / Missouri / Tornado Warnings in 2011

Tornado Warning 47, NWS St. Louis, MO

April 22, 2011Reynolds County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 22, 2011, 7:44 PM CDT for Reynolds County, Missouri. It was in force for 16 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: Apr 22, 2011, 7:44 PM CDT (00:44 UTC)
Expired: Apr 22, 2011, 8:00 PM CDT
In force: 16 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Reynolds County, MO

The radar

The St Louis radar (KLSX), 178 km from the middle of the area, began a volume at 00:46 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
Apr 22, 5:49 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.7 hours before the alert went out and 261 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: 2835 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 4.7
Supercell composite: 18.1

Open this sounding in Storm Lab

The text

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

561 
WFUS53 KLSX 230044
TORLSX
MOC179-230115-
/O.NEW.KLSX.TO.W.0047.110423T0044Z-110423T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
744 PM CDT FRI APR 22 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN REYNOLDS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 815 PM CDT

* AT 742 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR VAN BUREN...OR 22 MILES SOUTHWEST OF
  PIEDMONT...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GARWOOD.

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 3705 9097 3706 9098 3709 9098 3710 9103
      3713 9103 3721 9074 3717 9074 3716 9075
      3714 9076 3714 9078 3705 9078 3705 9079
TIME...MOT...LOC 0044Z 250DEG 41KT 3703 9103

$$

BRITT

1 follow-up statement

948 
WWUS53 KLSX 230100
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
800 PM CDT FRI APR 22 2011

MOC179-230109-
/O.CAN.KLSX.TO.W.0047.000000T0000Z-110423T0115Z/
REYNOLDS MO-
800 PM CDT FRI APR 22 2011

...THE TORNADO WARNING FOR SOUTHERN REYNOLDS COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING NO LONGER POSES AN IMMEDIATE 
THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 1 AM CDT.

LAT...LON 3705 9097 3706 9098 3709 9098 3710 9103
      3713 9103 3721 9074 3717 9074 3716 9075
      3714 9076 3714 9078 3705 9078 3705 9079
TIME...MOT...LOC 0059Z 250DEG 41KT 3709 9083

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 7:11 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Saint Charles, Warren	49 min
Apr 22, 7:20 PM CDT	Tornado Warning	LSX	Franklin, Gasconade, Saint Charles	40 min
Apr 22, 7:36 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis	39 min
Apr 22, 7:56 PM CDT	Tornado Warning	LSX	Franklin, Jefferson, Saint Louis	42 min
Apr 22, 7:59 PM CDT	Tornado Warning	LSX	Saint Louis, City of Saint Louis	46 min
Apr 22, 8:21 PM CDT	Tornado Warning	LSX	Jefferson, Saint Louis	39 min
Apr 22, 9:00 PM CDT	Flash Flood Warning	LSX	Franklin, Jefferson, Saint Louis	5 hr
Apr 22, 10:18 PM CDT	River Flood Warning	LSX	Jefferson	8 days
Apr 22, 10:55 PM CDT	Flash Flood Warning	LSX	Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more	6 hr
Apr 22, 11:10 PM CDT	River Flood Warning	LSX	Lewis	25 hr
Apr 22, 11:12 PM CDT	Tornado Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois	37 min
Apr 22, 11:53 PM CDT	River Flood Warning	LSX	Saint Louis, City of Saint Louis	14 days
Apr 23, 1:21 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois	30 min
Apr 23, 1:47 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	9 days
Apr 23, 4:23 AM CDT	Flash Flood Warning	LSX	Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more	8 hr
Apr 23, 6:45 AM CDT	River Flood Warning	LSX	Lewis	39 hr
Apr 23, 12:29 PM CDT	Flash Flood Warning	LSX	Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more	6 hr
Apr 23, 4:59 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	46 min
Apr 23, 5:27 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Washington	48 min
Apr 23, 5:41 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	33 min
Apr 23, 6:22 PM CDT	Flash Flood Warning	LSX	Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more	6 hr

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.