Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 19, NWS St. Louis, MO

February 29, 2012Iron County, Reynolds County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 29, 2012, 2:22 AM CST for Iron County, Reynolds County, Missouri. It was in force for 38 min. 4 reports 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: Feb 29, 2012, 2:22 AM CST (08:22 UTC)
Expired: Feb 29, 2012, 3:00 AM CST
In force: 38 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Iron County, MO, Reynolds County, MO

The radar

The St Louis radar (KLSX), 143 km from the middle of the area, began a volume at 08:23 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
Feb 29, 2:39 AM CST	TSTM WND GST 50	Lesterville, MO
Feb 29, 2:39 AM CST	HAIL 1	Lesterville, MO
Feb 29, 2:45 AM CST	TSTM WND DMG	2 E Annapolis, MO	TREE BLOWN DOWN...UNKNOWN SIZE...BLOCKING STATE HWY C EAST OF ANNAPOLIS
Feb 29, 2:48 AM CST	TSTM WND GST 40	Ironton, MO	ESTIMATED 40 MPH WIND GUSTS IN ADDITION TO PEA SIZE HAIL.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 29, 1:14 AM CST	Tornado Watch	SPC	11 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.4 hours before the alert went out and 265 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: 75 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 595 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 482 m²/s²
0-3 km storm-relative helicity: 563 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

116 
WUUS53 KLSX 290822
SVRLSX
MOC093-179-290900-
/O.NEW.KLSX.SV.W.0019.120229T0822Z-120229T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
222 AM CST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  IRON COUNTY IN SOUTHEAST MISSOURI...
  REYNOLDS COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 300 AM CST

* AT 218 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  REYNOLDS...OR 28 MILES SOUTHEAST OF SALEM...AND MOVING EAST AT 60
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  IRONTON...ELLINGTON...BIXBY...OATES...ANNAPOLIS...BELLEVIEW...
  GLOVER...PILOT KNOB...ARCADIA...CENTERVILLE...REDFORD...BLACK...
  LESTERVILLE...SABULA...VULCAN...DES ARC...CHLORIDE...HOGAN AND
  GRANITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3720 9109 3723 9113 3725 9113 3726 9115
      3750 9120 3759 9115 3774 9104 3773 9064
      3764 9064 3764 9053 3760 9053 3759 9055
      3729 9055 3727 9073 3725 9073 3718 9109
TIME...MOT...LOC 0822Z 256DEG 54KT 3742 9106
WIND...HAIL 60MPH 1.00IN

$$

TILLY

2 follow-up statements

005 
WWUS53 KLSX 290841
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
241 AM CST WED FEB 29 2012

MOC093-179-290900-
/O.CON.KLSX.SV.W.0019.000000T0000Z-120229T0900Z/
IRON MO-REYNOLDS MO-
241 AM CST WED FEB 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
REYNOLDS AND IRON COUNTIES UNTIL 300 AM CST...

AT 237 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
SOUTHWEST OF GLOVER...OR 14 MILES SOUTHWEST OF IRONTON...MOVING EAST
AT 65 MPH.

IN ADDITION...AT 240 AM QUARTER SIZE HAIL WAS REPORTED IN 
LESTERVILLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  IRONTON...BELLEVIEW...GLOVER...PILOT KNOB...ARCADIA...SABULA...
  VULCAN...CHLORIDE...HOGAN...DES ARC AND GRANITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL 
INTERIOR ROOM.

&&

LAT...LON 3772 9087 3773 9065 3764 9064 3764 9053
      3760 9053 3759 9055 3729 9055 3727 9073
      3725 9073 3720 9101
TIME...MOT...LOC 0841Z 258DEG 55KT 3746 9073
WIND...HAIL 60MPH 1.00IN

$$

TILLY

396 
WWUS53 KLSX 290859
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
259 AM CST WED FEB 29 2012

MOC093-179-290909-
/O.EXP.KLSX.SV.W.0019.000000T0000Z-120229T0900Z/
IRON MO-REYNOLDS MO-
259 AM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN REYNOLDS AND IRON
COUNTIES WILL EXPIRE AT 300 AM CST...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 900 AM CST. 

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 3772 9087 3773 9065 3764 9064 3764 9053
      3760 9053 3759 9055 3729 9055 3727 9073
      3725 9073 3720 9101
TIME...MOT...LOC 0859Z 262DEG 47KT 3750 9042

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 29, 1:21 AM CST	Tornado Warning	LSX	Crawford	39 min
Feb 29, 1:52 AM CST	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	53 min
Feb 29, 2:13 AM CST	Tornado Warning	LSX	Jefferson, Saint Francois, Washington	20 min
Feb 29, 2:31 AM CST	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve	31 min
Feb 29, 2:50 AM CST	Severe Thunderstorm Warning	LSX	Madison	40 min
Feb 29, 3:05 AM CST	Tornado Warning	LSX	Madison	25 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every severe thunderstorm warning in 2012

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.