Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 59, NWS Shreveport, LA

April 26, 2011Jackson Parish, Ouachita Parish, Union Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Apr 26, 2011, 11:28 PM CDT for Jackson Parish, Ouachita Parish, Union Parish, Louisiana. It was in force for 47 min. 5 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: Apr 26, 2011, 11:28 PM CDT (04:28 UTC)
Expired: Apr 27, 2011, 12:15 AM CDT
In force: 47 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Jackson Parish, LA, Ouachita Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 161 km from the middle of the area, began a volume at 04:28 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
Apr 26, 11:28 PM CDT	TSTM WND DMG	West Monroe, LA	SEVERAL TREES DOWN NEAR BRYAN DRIVE AND GOOD HOPE ROAD IN WEST MONROE.
Apr 26, 11:35 PM CDT	HAIL 1	4 Sw Cheniere, LA	QUARTER SIZE HAIL NEAR THE INTERSECTION OF HIGHWAY 546 AND NEW NATCHITOCHES ROAD.
Apr 26, 11:39 PM CDT	TSTM WND GST 51	Monroe, LA	AT THE MONROE REGIONAL AIRPORT. ANOTHER OCCURRANCE.
Apr 26, 11:40 PM CDT	TSTM WND DMG	1 N West Monroe, LA	NUMEROUS TREES WERE DOWNED ON WALL WILLIAMS ROAD...KENNY LANE...AND T JOHN ROAD. OTHER TREES WERE DOWNED ON OLD DARBONNE ROAD NEAR KIROLI PARK. POSSIBLE TORNADO.
Apr 26, 11:50 PM CDT	TSTM WND DMG	5 Ssw Calhoun, LA	SHUTTERS TORN OFF OF A HOUSE ON GUYTON SWAMP ROAD.

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
Apr 26, 1:44 PM CDT	Tornado Watch PDS	SPC	10 hr
Apr 26, 9:33 PM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 4.5 hours before the alert went out and 152 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: 2270 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 281 m²/s²
0-3 km storm-relative helicity: 428 m²/s²
Significant tornado parameter: 5.6
Supercell composite: 23.5

Open this sounding in Storm Lab

The text

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

619 
WFUS54 KSHV 270428
TORSHV
LAC049-073-111-270515-
/O.NEW.KSHV.TO.W.0059.110427T0428Z-110427T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1128 PM CDT TUE APR 26 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN JACKSON PARISH IN NORTH CENTRAL LOUISIANA...
  OUACHITA PARISH IN NORTH CENTRAL LOUISIANA...
  THIS INCLUDES THE CITIES OF...WEST MONROE...SWARTZ...MONROE...
  CLAIBORNE...BROWNSVILLE-BAWCOMVILLE...
  SOUTHEASTERN UNION PARISH IN NORTH CENTRAL LOUISIANA...

* UNTIL 1215 AM CDT

* AT 1127 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 17 MILES
  SOUTHWEST OF BROWNSVILLE-BAWCOMVILLE...OR 16 MILES SOUTHEAST OF
  RUSTON...MOVING EAST NORTHEAST 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  RICHWOOD AND STERLINGTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

&&

LAT...LON 3236 9200 3229 9244 3246 9252 3250 9244
      3250 9242 3252 9241 3273 9206 3271 9204
      3272 9200 3271 9195 3267 9194 3267 9190
      3258 9191 3253 9189
TIME...MOT...LOC 0427Z 248DEG 43KT 3241 9237

$$

13

2 follow-up statements

776 
WWUS54 KSHV 270436
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1136 PM CDT TUE APR 26 2011

LAC049-270446-
/O.CAN.KSHV.TO.W.0059.000000T0000Z-110427T0515Z/
JACKSON LA-
1136 PM CDT TUE APR 26 2011

...THE TORNADO WARNING FOR JACKSON PARISH IS CANCELLED...

LAT...LON 3236 9200 3232 9230 3250 9242 3252 9241
      3273 9206 3271 9204 3272 9200 3271 9195
      3267 9194 3267 9190 3258 9191 3253 9189
TIME...MOT...LOC 0436Z 248DEG 43KT 3243 9226

$$

LAC073-111-270515-
/O.CON.KSHV.TO.W.0059.000000T0000Z-110427T0515Z/
UNION LA-OUACHITA LA-
1136 PM CDT TUE APR 26 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR OUACHITA
AND UNION PARISHES...

AT 1136 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS
LOCATED NEAR CADERVILLE...OR 9 MILES SOUTHWEST OF BROWNSVILLE-
BAWCOMVILLE...MOVING EAST AT 50 MPH. THIS IS A VERY SERIOUS 
SITUATION. THIS STORM IS HEADED FOR THE MONROE AREA. TAKE COVER
IMMEDIATELY. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CHENIERE...DREW...FONDALE...CLAIBORNE...WEST MONROE...RICHWOOD...
MONROE...PINE GROVE...LOCH LOMON...MILLHAVEN...DESHARD...
STERLINGTON...FAIRBANKS...SWARTZ...GUTHRIE AND PERRYVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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.

&&

LAT...LON 3236 9200 3232 9230 3250 9242 3252 9241
      3273 9206 3271 9204 3272 9200 3271 9195
      3267 9194 3267 9190 3258 9191 3253 9189
TIME...MOT...LOC 0436Z 248DEG 43KT 3243 9226

$$

13

448 
WWUS54 KSHV 270445 RRA
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1145 PM CDT TUE APR 26 2011

LAC073-111-270515-
/O.CON.KSHV.TO.W.0059.000000T0000Z-110427T0515Z/
UNION LA-OUACHITA LA-
1145 PM CDT TUE APR 26 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR OUACHITA
AND UNION PARISHES...

AT 1145 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS
LOCATED NEAR BROWNSVILLE-BAWCOMVILLE...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
RICHWOOD...MONROE...PINE GROVE...LOCH LOMON...MILLHAVEN...DESHARD...
STERLINGTON...FAIRBANKS...SWARTZ...GUTHRIE AND PERRYVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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.

&&

LAT...LON 3236 9200 3232 9230 3250 9242 3252 9241
      3273 9206 3271 9204 3272 9200 3271 9195
      3267 9194 3267 9190 3258 9191 3253 9189
TIME...MOT...LOC 0445Z 248DEG 43KT 3246 9213

$$

13

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 7:10 PM CDT	Tornado Warning	SHV	Bossier, Caddo	50 min
Apr 26, 7:18 PM CDT	Severe Thunderstorm Warning	SHV	Caddo, De Soto	57 min
Apr 26, 7:22 PM CDT	Tornado Warning	SHV	Bossier, Caddo	23 min
Apr 26, 7:41 PM CDT	Tornado Warning	SHV	Caddo, De Soto	49 min
Apr 26, 7:44 PM CDT	Tornado Warning	SHV	Bossier, Webster	46 min
Apr 26, 8:25 PM CDT	Tornado Warning	SHV	Bienville, Bossier, Caddo, De Soto, Red River, Webster	50 min
Apr 26, 8:30 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, De Soto, Natchitoches, Red River	45 min
Apr 26, 8:46 PM CDT	Tornado Warning	SHV	Bienville, Claiborne, Webster	32 min
Apr 26, 8:52 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Webster	38 min
Apr 26, 9:05 PM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln	25 min
Apr 26, 9:10 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson	50 min
Apr 26, 9:16 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Union	44 min
Apr 26, 9:25 PM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln	35 min
Apr 26, 9:30 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Union	45 min
Apr 26, 9:41 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	49 min
Apr 26, 9:49 PM CDT	Tornado Warning	SHV	Jackson, Lincoln, Ouachita, Union	41 min
Apr 26, 9:56 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	49 min
Apr 26, 9:59 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Ouachita	46 min
Apr 26, 10:02 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln, Webster	43 min
Apr 26, 10:14 PM CDT	Severe Thunderstorm Warning	SHV	Union	46 min
Apr 26, 10:14 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Webster	46 min
Apr 26, 10:18 PM CDT	Tornado Warning	SHV	Jackson, Ouachita	42 min
Apr 26, 10:37 PM CDT	Tornado Warning	SHV	Ouachita	23 min
Apr 26, 10:46 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Jackson, Lincoln, Red River, Union	44 min
Apr 26, 10:51 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Union	54 min
Apr 26, 10:54 PM CDT	Tornado Warning	SHV	Bienville, Jackson, Natchitoches, Red River, Winn	51 min
Apr 26, 10:57 PM CDT	Tornado Warning	SHV	Claiborne, Union	45 min
Apr 26, 11:14 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Jackson, Lincoln, Ouachita, Union	61 min
Apr 26, 11:31 PM CDT	Flash Flood Warning	SHV	Jackson, Lincoln, Ouachita	4 hr
Apr 26, 11:34 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	56 min
Apr 27, 12:14 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, De Soto, Jackson, Natchitoches, Ouachita and 2 more	61 min
Apr 27, 12:23 AM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	67 min
Apr 27, 12:39 AM CDT	Tornado Warning	SHV	Natchitoches, Sabine	46 min
Apr 27, 1:05 AM CDT	Severe Thunderstorm Warning	SHV	Ouachita	44 min
Apr 27, 1:05 AM CDT	Tornado Warning	SHV	Caldwell, Grant, LaSalle, Natchitoches, Winn	55 min
Apr 27, 1:16 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Grant, Jackson, LaSalle, Natchitoches and 3 more	59 min
Apr 27, 1:33 AM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Red River, Sabine	42 min
Apr 27, 1:44 AM CDT	Tornado Warning	SHV	Caldwell, LaSalle	31 min
Apr 27, 2:00 AM CDT	Tornado Warning	SHV	Sabine	47 min
Apr 27, 2:15 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Natchitoches, Winn	60 min
Apr 27, 3:27 AM CDT	Flash Flood Warning	SHV	Jackson, Ouachita	6 hr
Apr 27, 5:44 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	38 min
Apr 27, 7:30 AM CDT	Lake Wind Advisory	SHV	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more	12 hr

Nearby

Tornado Warnings in Louisiana, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.