Alert archive / Arkansas / Tornado Warnings in 2011

Tornado Warning 27, NWS Shreveport, LA

April 25, 2011Little River County, Sevier County, Arkansas; McCurtain County, Oklahoma

NWS Shreveport, LA issued this tornado warning at Apr 25, 2011, 5:27 PM CDT for Little River County, Sevier County, Arkansas; McCurtain County, Oklahoma. It was in force for 33 min. 2 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 25, 2011, 5:27 PM CDT (22:27 UTC)
Expired: Apr 25, 2011, 6:00 PM CDT
In force: 33 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Little River County, AR, Sevier County, AR, McCurtain County, OK

The radar

The Western Arkansas radar (KSRX), 149 km from the middle of the area, began a volume at 22:27 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 25, 5:37 PM CDT	TORNADO	4 Sw Horatio, AR	AN EF0 TORNADO TOUCHED DOWN 4 MILES SOUTHWEST OF HORATIO ALONG STATE HWY 41. THE TORNADO CONTINUED NORTHEAST INTO SEVIER COUNTY...ENDING 3 MILES EAST NORTHEAST OF HORATIO ON HWY 24. DAMAGE CONSISTED MAINLY OF TREES BEING SNAPPED AND UPROOTED. WINDS ARE ESTIMAT
Apr 25, 5:48 PM CDT	TORNADO	7 Se Horatio, AR	NUMEROUS TREES DOWNED IN THE COMMUNITY OF CENTRAL

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 25, 11:00 AM CDT	Tornado Watch	SPC	7 hr
Apr 25, 3:22 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 10.5 hours before the alert went out and 170 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: 1213 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 491 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 11.5

Open this sounding in Storm Lab

The text

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

190 
WFUS54 KSHV 252227
TORSHV
ARC081-133-OKC089-252300-
/O.NEW.KSHV.TO.W.0027.110425T2227Z-110425T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
527 PM CDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MCCURTAIN COUNTY IN SOUTHEAST OKLAHOMA...
  NORTHWESTERN LITTLE RIVER COUNTY IN SOUTHWEST ARKANSAS...
  SEVIER COUNTY IN SOUTHWEST ARKANSAS...
  THIS INCLUDES THE CITY OF HORATIO...

* UNTIL 600 PM CDT.

* AT 523 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST OF
  ARKINDA...OR 11 MILES WEST OF FOREMAN...MOVING NORTHEAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WINTHROP...ALLEENE...BEN LOMOND AND LOCKESBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3413 9408 3393 9406 3381 9397 3369 9459
      3382 9466 3419 9411
TIME...MOT...LOC 2228Z 245DEG 52KT 3379 9450

$$

12

1 follow-up statement

011 
WWUS54 KSHV 252253
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
553 PM CDT MON APR 25 2011

OKC089-252303-
/O.CAN.KSHV.TO.W.0027.000000T0000Z-110425T2300Z/
MCCURTAIN OK-
553 PM CDT MON APR 25 2011

...THE TORNADO WARNING FOR MCCURTAIN COUNTY IS CANCELLED...

LAT...LON 3414 9409 3413 9408 3408 9408 3407 9407
      3407 9408 3391 9405 3381 9397 3373 9442
      3398 9442 3419 9411
TIME...MOT...LOC 2253Z 245DEG 52KT 3394 9410

$$

ARC081-133-252300-
/O.CON.KSHV.TO.W.0027.000000T0000Z-110425T2300Z/
LITTLE RIVER AR-SEVIER AR-
553 PM CDT MON APR 25 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR SEVIER
AND LITTLE RIVER COUNTIES...

AT 549 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A POSSIBLE TORNADO. THIS 
POSSIBLE TORNADO WAS LOCATED NEAR BELLVIEW...OR 11 MILES EAST 
OF HORATIO...MOVING NORTHEAST AT 60 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SILVER
RIDGE...PROVO AND LEBANON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3414 9409 3413 9408 3408 9408 3407 9407
      3407 9408 3391 9405 3381 9397 3373 9442
      3398 9442 3419 9411
TIME...MOT...LOC 2253Z 245DEG 52KT 3394 9410

$$

12

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 10:17 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Sevier	58 min
Apr 25, 12:14 AM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	76 min
Apr 25, 12:41 AM CDT	Severe Thunderstorm Warning	SHV	Little River, Sevier	64 min
Apr 25, 1:24 AM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Nevada, Sevier	66 min
Apr 25, 3:48 AM CDT	Lake Wind Advisory	SHV	Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more	21 hr
Apr 25, 6:14 AM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	61 min
Apr 25, 7:11 AM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Sevier	64 min
Apr 25, 8:47 AM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Little River, Miller, Nevada	43 min
Apr 25, 9:05 AM CDT	Tornado Warning	SHV	Hempstead, Nevada	25 min
Apr 25, 9:26 AM CDT	Tornado Warning	SHV	Hempstead, Nevada	19 min
Apr 25, 1:22 PM CDT	Tornado Warning	SHV	Sevier	23 min
Apr 25, 2:10 PM CDT	Tornado Warning	SHV	Howard, Sevier	35 min
Apr 25, 2:53 PM CDT	Flash Flood Warning	SHV	Howard, Little River, Sevier	4 hr
Apr 25, 3:03 PM CDT	Tornado Warning	SHV	Howard, Little River, Sevier	27 min
Apr 25, 3:14 PM CDT	Severe Thunderstorm Warning	SHV	Little River, Sevier	46 min
Apr 25, 3:28 PM CDT	Tornado Warning	SHV	Howard, Sevier	32 min
Apr 25, 3:39 PM CDT	Severe Thunderstorm Warning	SHV	Little River, Sevier	51 min
Apr 25, 3:49 PM CDT	Flash Flood Watch	SHV	Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more	39 hr
Apr 25, 3:59 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Sevier	46 min
Apr 25, 4:02 PM CDT	Tornado Warning	SHV	Little River, Sevier	28 min
Apr 25, 4:27 PM CDT	Tornado Warning	SHV	Howard, Sevier	48 min
Apr 25, 5:14 PM CDT	Tornado Warning	SHV	Little River	31 min
Apr 25, 5:30 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Miller, Sevier	45 min
Apr 25, 6:06 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Nevada, Sevier	39 min
Apr 25, 6:15 PM CDT	Tornado Warning	SHV	Hempstead, Howard, Little River, Sevier	45 min
Apr 25, 6:43 PM CDT	Flash Flood Warning	SHV	Hempstead, Howard, Little River, Sevier	3 hr
Apr 25, 6:54 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Lafayette, Little River, Miller	51 min
Apr 25, 6:57 PM CDT	Severe Thunderstorm Warning	SHV	Miller	48 min
Apr 24, 9:35 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	55 min
Apr 24, 9:49 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	41 min
Apr 25, 5:19 AM CDT	Severe Thunderstorm Warning	SHV	McCurtain	56 min
Apr 25, 12:11 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	49 min
Apr 25, 12:29 PM CDT	Flash Flood Warning	SHV	McCurtain	4 hr
Apr 25, 12:59 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	61 min
Apr 25, 1:37 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	38 min
Apr 25, 1:48 PM CDT	Tornado Warning	SHV	McCurtain	27 min
Apr 25, 2:05 PM CDT	River Flood Warning	SHV	McCurtain	16 hr
Apr 25, 2:37 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	38 min
Apr 25, 4:31 PM CDT	Flash Flood Warning	SHV	McCurtain	4 hr
Apr 25, 6:02 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	43 min

Nearby

Tornado Warnings in Arkansas, 2011 Tornado Warnings in Oklahoma, 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.