Alert archive / Arkansas / Tornado Warnings in 2011

Tornado Warning 30, NWS Shreveport, LA

April 25, 2011Columbia County, Lafayette County, Union County, Arkansas

NWS Shreveport, LA issued this tornado warning at Apr 25, 2011, 7:56 PM CDT for Columbia County, Lafayette County, Union County, Arkansas. It was in force for 27 min. 1 report 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, 7:56 PM CDT (00:56 UTC)
Expired: Apr 25, 2011, 8:23 PM CDT
In force: 27 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Columbia County, AR, Lafayette County, AR, Union County, AR

The radar

The Shreveport radar (KSHV), 121 km from the middle of the area, began a volume at 00:56 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, 8:17 PM CDT	TSTM WND GST 70	Stamps, AR	STATE POLICE RELAYED A REPORT OF 60 TO 70 MPH WINDS IN STAMPS ARKANSAS

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, 3:22 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 0.9 hours before the alert went out and 113 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: 782 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 262 m²/s²
0-3 km storm-relative helicity: 553 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 15.0

Open this sounding in Storm Lab

The text

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

931 
WFUS54 KSHV 260056
TORSHV
ARC027-073-139-260145-
/O.NEW.KSHV.TO.W.0030.110426T0056Z-110426T0145Z/

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

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN UNION COUNTY IN SOUTH CENTRAL ARKANSAS...
  NORTHERN COLUMBIA COUNTY IN SOUTHWEST ARKANSAS...
  THIS INCLUDES THE CITIES OF...WALDO...MCNEIL...MAGNOLIA...
  EAST CENTRAL LAFAYETTE COUNTY IN SOUTHWEST ARKANSAS...
  THIS INCLUDES THE CITY OF STAMPS...

* UNTIL 845 PM CDT

* AT 751 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR BUCKNER...
  OR NEAR STAMPS...MOVING EAST AT 70 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  VILLAGE...MOUNT HOLLY AND LISBON...

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 3325 9282 3320 9347 3337 9354 3346 9315
      3346 9311 3339 9310 3338 9284
TIME...MOT...LOC 0056Z 269DEG 61KT 3330 9335

$$

ELEVEN

1 follow-up statement

844 
WWUS54 KSHV 260123
SVSSHV

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

ARC027-073-139-260133-
/O.CAN.KSHV.TO.W.0030.000000T0000Z-110426T0145Z/
UNION AR-COLUMBIA AR-LAFAYETTE AR-
823 PM CDT MON APR 25 2011

...THE TORNADO WARNING FOR LAFAYETTE...COLUMBIA AND UNION COUNTIES IS
CANCELLED...

LAT...LON 3325 9282 3320 9347 3337 9354 3346 9315
      3346 9311 3339 9310 3338 9284
TIME...MOT...LOC 0123Z 269DEG 61KT 3321 9280

$$

ELEVEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 7:01 PM CDT	Tornado Warning	SHV	Hempstead, Lafayette, Miller	44 min
Apr 25, 7:11 PM CDT	Flash Flood Warning	SHV	Little River, Miller	3 hr
Apr 25, 7:19 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Nevada	41 min
Apr 25, 7:45 PM CDT	Severe Thunderstorm Warning	SHV	Miller	60 min
Apr 25, 7:49 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Hempstead, Lafayette, Miller, Nevada	56 min
Apr 25, 8:45 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Lafayette, Miller	60 min
Apr 25, 8:49 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Lafayette, Union	56 min
Apr 25, 9:28 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Lafayette	62 min
Apr 25, 9:44 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Union	61 min
Apr 25, 10:48 PM CDT	Severe Thunderstorm Warning	SHV	Union	31 min
Apr 26, 1:07 AM CDT	Severe Thunderstorm Warning	SHV	Nevada	23 min
Apr 26, 6:10 AM CDT	River Flood Warning	SHV	Howard, Little River, Sevier	47 hr
Apr 26, 9:49 AM CDT	River Flood Warning	SHV	Columbia	7 days
Apr 26, 3:11 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Hempstead, Lafayette, Nevada	49 min
Apr 26, 6:40 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Lafayette, Miller, Nevada	50 min
Apr 26, 6:46 PM CDT	Tornado Warning	SHV	Nevada	14 min
Apr 26, 6:58 PM CDT	Tornado Warning	SHV	Howard	32 min

Nearby

Tornado Warnings in Arkansas, 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.