Alert archive / Louisiana / Tornado Warnings in 2012

Tornado Warning 26, NWS Jackson, MS

March 11, 2012Morehouse Parish, West Carroll Parish, Louisiana

NWS Jackson, MS issued this tornado warning at Mar 11, 2012, 7:48 PM CDT for Morehouse Parish, West Carroll Parish, Louisiana. It was in force for 27 min. 6 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: Mar 11, 2012, 7:48 PM CDT (00:48 UTC)
Expired: Mar 11, 2012, 8:15 PM CDT
In force: 27 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Morehouse Parish, LA, West Carroll Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 155 km from the middle of the area, began a volume at 00:48 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
Mar 11, 7:57 PM CDT	TSTM WND DMG	3 Se Bonita, LA	TREES AND POWER LINES DOWN
Mar 11, 7:57 PM CDT	TSTM WND DMG	6 Wnw Oak Grove, LA	NUMEROUS TREES AND POWERLINES DOWN IN THE FISKE COMMUNITY. ONE STRUCTURE WITH AT LEAST MINOR DAMAGE.
Mar 11, 7:57 PM CDT	TORNADO 0	6 W Oak Grove, LA	TORNADO EF-0, MAX WIND 85MPH, PATH LENGTH 2.6 MILES, MAX PATH WIDTH 100 YARDS, TOUCHED DOWN ALONG BAR K ROAD, WHERE MULTIPLE TREES WERE SNAPPED OR UPROOTED, AND ONE MANUFACTURED HOME WAS DAMAGED BY A FALLING TREE. THE TORNADO CONTINUED NORTHEAST, THROUGH THE F
Mar 11, 8:03 PM CDT	TSTM WND DMG	1 W Oak Grove, LA	TREES AND POWERLINES DOWN
Mar 11, 8:03 PM CDT	TSTM WND DMG	5 Nw Oak Grove, LA	TREES AND POWERLINES DOWN. ONE TREE DOWN ON A HOUSE ALONG HIGHWAY 586 CAUSING MINOR DAMAGE TO THE HOUSE.
Mar 11, 8:05 PM CDT	TSTM WND DMG	4 E Jones, LA	TREES AND POWER LINES DOWN

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
Mar 11, 6:42 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.8 hours before the alert went out and 145 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: 10 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 960 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 261 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.

056 
WFUS54 KJAN 120048
TORJAN
LAC067-123-120115-
/O.NEW.KJAN.TO.W.0026.120312T0048Z-120312T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
748 PM CDT SUN MAR 11 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN MOREHOUSE PARISH IN NORTHEAST LOUISIANA...
  NORTHERN WEST CARROLL PARISH IN NORTHEAST LOUISIANA...

* UNTIL 815 PM CDT

* AT 748 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES WEST OF
  GOODWILL MOVING NORTHEAST AT 65 MPH.

* THE TORNADO WILL BE NEAR...
  KILBOURNE BY 805 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT A TORNADO IS OCCURRING OR IMMINENT. YOU
SHOULD ACTIVATE YOUR TORNADO ACTION PLAN AND TAKE PROTECTIVE ACTION
NOW.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY MORNING FOR
SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA AND WESTERN MISSISSIPPI.

&&

LAT...LON 3301 9167 3300 9162 3301 9127 3300 9126
      3299 9127 3298 9127 3297 9128 3296 9127
      3295 9130 3293 9131 3267 9166 3280 9181
TIME...MOT...LOC 0048Z 228DEG 55KT 3283 9160

$$

BK

1 follow-up statement

228 
WWUS54 KJAN 120109
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
809 PM CDT SUN MAR 11 2012

LAC067-123-120119-
/O.EXP.KJAN.TO.W.0026.000000T0000Z-120312T0115Z/
MOREHOUSE LA-WEST CARROLL LA-
809 PM CDT SUN MAR 11 2012

...THE TORNADO WARNING FOR NORTHERN WEST CARROLL AND EASTERN
MOREHOUSE PARISHES WILL EXPIRE AT 815 PM CDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY MORNING FOR
SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA AND WESTERN MISSISSIPPI.

LAT...LON 3301 9167 3300 9162 3301 9127 3300 9126
      3299 9127 3298 9127 3297 9128 3296 9127
      3295 9130 3293 9131 3267 9166 3280 9181
TIME...MOT...LOC 0109Z 228DEG 55KT 3304 9131

$$

BK

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 11, 7:07 PM CDT	Special Weather Statement	JAN	Franklin	28 min
Mar 11, 7:18 PM CDT	Special Weather Statement	JAN	Morehouse, Richland	37 min
Mar 11, 7:24 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse	51 min
Mar 11, 7:38 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse, Richland, West Carroll	37 min
Mar 11, 7:42 PM CDT	Flash Flood Warning	JAN	East Carroll, Morehouse, Richland, West Carroll	3 hr
Mar 11, 8:06 PM CDT	Special Weather Statement	JAN	Franklin	29 min
Mar 11, 8:07 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Madison	38 min
Mar 11, 8:16 PM CDT	Special Weather Statement	JAN	East Carroll	29 min
Mar 11, 8:28 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll	47 min
Mar 11, 8:48 PM CDT	Flash Flood Warning	JAN	East Carroll, Franklin, Madison, Richland, Tensas	117 min
Mar 11, 9:03 PM CDT	Severe Thunderstorm Warning	JAN	Madison	42 min

Nearby

Tornado Warnings in Louisiana, 2012 Every tornado warning in 2012 Tornadoes 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.