Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 73, NWS Shreveport, LA

May 25, 2011Lincoln Parish, Union Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at May 25, 2011, 7:42 PM CDT for Lincoln Parish, Union Parish, Louisiana. It was in force for 48 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: May 25, 2011, 7:42 PM CDT (00:42 UTC)
Expired: May 25, 2011, 8:30 PM CDT
In force: 48 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Lincoln Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 157 km from the middle of the area, began a volume at 00:45 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
May 25, 7:55 PM CDT	HAIL 1.25	2 W Farmerville, LA
May 25, 7:55 PM CDT	HAIL 1.75	2 W Farmerville, LA	DIME SIZE TO GOLF BALL, HIGH WIND. PATRICK CHURCH AND STATE HIGHWAY 2.
May 25, 7:58 PM CDT	TORNADO	1 Ssw Farmerville, LA	AN EF0 TORNADO TOUCHED DOWN OVER BAYOU DARBONNE AND MOVED EAST ACROSS SOUTHEAST FARMERVILLE. A FEW TREES AND TREE LIMBS WERE SNAPPED ALONG THE SHORELINE AND ALONG TERRAL ISLAND ROAD. SEVERAL TREES WERE ALSO SNAPPED EAST ALONG HWY 2 NEAR THE END OF THE TRACK. T
May 25, 8:08 PM CDT	HAIL 1	S Farmerville, LA
May 25, 8:15 PM CDT	TORNADO	Farmerville, LA	NUMEROUS REPORTS OF DOWNED TREES AND POWERLINES INSIDE CITY LIMITS. POWER OUTAGES AT OTHER LOCATIONS ACROSS UNION PARISH. TREES BLOCKING SOME ROADS.
May 25, 8:20 PM CDT	TORNADO	2 Wnw Farmerville, LA	AN EF1 TORNADO TOUCHED DOWN WEST OF FARMERVILLE SOUTH OF HWY 2 AND TRACKED EAST NORTHEAST. NUMEROUS TREES AND POWERLINES WERE SNAPPED. THE HIGHSCHOOL FOOTBALL STADIUM SUSTAINED MINOR DAMAGE. THE ELEMENTARY SCHOOL HAD MINOR ROOF DAMAGE. APPROX 2 HOMES SUSTAINED

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
May 25, 3:16 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 0.7 hours before the alert went out and 148 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: 1872 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1613 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 10.7

Open this sounding in Storm Lab

The text

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

845 
WFUS54 KSHV 260042
TORSHV
LAC061-111-260130-
/O.NEW.KSHV.TO.W.0073.110526T0042Z-110526T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
742 PM CDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN LINCOLN PARISH IN NORTH CENTRAL LOUISIANA...
  SOUTHERN UNION PARISH IN NORTH CENTRAL LOUISIANA...

* UNTIL 830 PM CDT

* AT 741 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES WEST OF
  FARMERVILLE...MOVING EAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BAYOU
  D ARBONNE LAKE...LINVILLE...ROCKY BRANCH...HAILE...SPENCER AND LOCH
  LOMON.

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.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL 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 3269 9208 3268 9211 3267 9213 3266 9214
      3260 9223 3273 9262 3284 9259 3285 9205
      3283 9206 3278 9204
TIME...MOT...LOC 0042Z 273DEG 28KT 3275 9256

$$

06

1 follow-up statement

884 
WWUS54 KSHV 260122
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
822 PM CDT WED MAY 25 2011

LAC061-260129-
/O.CAN.KSHV.TO.W.0073.000000T0000Z-110526T0130Z/
LINCOLN LA-
822 PM CDT WED MAY 25 2011

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

LAT...LON 3269 9208 3267 9214 3266 9214 3260 9223
      3266 9241 3267 9242 3268 9248 3284 9245
      3285 9205 3283 9206 3278 9205
TIME...MOT...LOC 0119Z 273DEG 12KT 3274 9238

$$

LAC111-260130-
/O.CON.KSHV.TO.W.0073.000000T0000Z-110526T0130Z/
UNION LA-
822 PM CDT WED MAY 25 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR UNION
PARISH...

AT 814 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS 
LOCATED NEAR BAYOU D ARBONNE LAKE...OR ABOUT 2 MILES SOUTH OF 
FARMERVILLE...AND MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SPENCER...ROCKY BRANCH...LOCH LOMON...LINVILLE AND HAILE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT 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.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A 
SUBSTANTIAL SHELTER. 

&&

LAT...LON 3269 9208 3267 9214 3266 9214 3260 9223
      3266 9241 3267 9242 3268 9248 3284 9245
      3285 9205 3283 9206 3278 9205
TIME...MOT...LOC 0119Z 273DEG 12KT 3274 9238

$$

06
06

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 7:14 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Sabine	61 min
May 25, 7:28 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Ouachita, Union	62 min
May 25, 8:03 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Claiborne, Jackson, Lincoln, Ouachita and 2 more	57 min
May 25, 8:31 PM CDT	Tornado Warning	SHV	Ouachita, Union	30 min
May 25, 8:54 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, De Soto, Grant, Jackson, LaSalle and 4 more	66 min
May 25, 9:13 PM CDT	Tornado Warning	SHV	De Soto, Natchitoches, Red River, Sabine	32 min
May 25, 9:45 PM CDT	Tornado Warning	SHV	Natchitoches, Sabine	30 min
May 25, 9:57 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, LaSalle, Winn	39 min
May 25, 10:16 PM CDT	Tornado Warning	SHV	Grant, Natchitoches, Winn	44 min
May 25, 11:06 PM CDT	Severe Thunderstorm Warning	SHV	Grant, LaSalle, Natchitoches	39 min

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.