Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 113, NWS Shreveport, LA

April 25, 20115 counties in Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 25, 2011, 1:24 AM CDT for 5 counties in Arkansas. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 25, 2011, 1:24 AM CDT (06:24 UTC)
Expired: Apr 25, 2011, 2:30 AM CDT
In force: 66 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Hempstead County, AR, Howard County, AR, Little River County, AR, Nevada County, AR, Sevier County, AR

The radar

The Shreveport radar (KSHV), 156 km from the middle of the area, began a volume at 06:26 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.

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 24, 11:43 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 6.4 hours before the alert went out and 153 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: 253 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1930 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

529 
WUUS54 KSHV 250624
SVRSHV
ARC057-061-081-099-133-250730-
/O.NEW.KSHV.SV.W.0113.110425T0624Z-110425T0730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
124 AM CDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HEMPSTEAD COUNTY IN SOUTHWEST ARKANSAS...
  HOWARD COUNTY IN SOUTHWEST ARKANSAS...
  THIS INCLUDES THE CITIES OF...NASHVILLE...MINERAL SPRINGS...
  DIERKS...
  EASTERN LITTLE RIVER COUNTY IN SOUTHWEST ARKANSAS...
  THIS INCLUDES THE CITY OF ASHDOWN...
  NORTHERN NEVADA COUNTY IN SOUTHWEST ARKANSAS...
  THIS INCLUDES THE CITY OF PRESCOTT...
  EASTERN SEVIER COUNTY IN SOUTHWEST ARKANSAS...

* UNTIL 230 AM CDT

* AT 123 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 8 MILES WEST OF DIERKS TO 7 MILES NORTHEAST OF BEN
  LOMOND TO RICHMOND...OR ALONG A LINE EXTENDING FROM 8 MILES WEST OF
  DIERKS TO 7 MILES WEST OF MINERAL SPRINGS TO 9 MILES SOUTHWEST OF
  ASHDOWN...AND MOVING EAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CENTER POINT...TOLLETTE...SARATOGA...CORINTH...WASHINGTON...
  BLEVINS...PERRYTOWN AND EMMET...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3432 9393 3419 9391 3418 9380 3401 9381
      3395 9351 3397 9337 3392 9330 3385 9328
      3380 9311 3377 9311 3357 9413 3359 9420
      3355 9422 3359 9423 3356 9428 3359 9428
      3356 9431 3357 9435 3386 9425 3414 9434
TIME...MOT...LOC 0624Z 249DEG 51KT 3410 9414 3391 9402
          3357 9419

$$

06

3 follow-up statements

744 
WWUS54 KSHV 250642
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
142 AM CDT MON APR 25 2011

ARC057-061-081-099-133-250730-
/O.CON.KSHV.SV.W.0113.000000T0000Z-110425T0730Z/
LITTLE RIVER AR-NEVADA AR-HEMPSTEAD AR-SEVIER AR-HOWARD AR-
142 AM CDT MON APR 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR HOWARD...SEVIER...HEMPSTEAD...NEVADA AND LITTLE RIVER COUNTIES...

AT 135 AM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A LINE OF SEVERE THUNDERSTORMS
CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM DIERKS TO MUDDY FORK 
TO NASHVILLE TO MINERAL SPRINGS TO ASHDOWN...MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RED
BLUFF...BRIGHT STAR...MCNAB...OZAN...MCCASKILL...WASHINGTON...
OAKHAVEN...BLEVINS...EMMET...PRESCOTT AND BOUGHTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD 
TO GROUND LIGHTNING. THE WINDS WITH THIS LINE WILL DOWN TREES AND 
POWER LINES AND WILL HAVE THE CAPABILITY TO DAMAGE BUILDINGS. PEOPLE 
OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG 
BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3419 9391 3418 9380 3401 9381 3395 9354
      3397 9337 3392 9330 3385 9328 3380 9311
      3378 9312 3357 9415 3360 9417 3380 9415
      3397 9406 3412 9413 3425 9410 3431 9393
TIME...MOT...LOC 0640Z 249DEG 51KT 3420 9389 3411 9382
          3401 9377 3392 9381 3369 9400

$$

06

741 
WWUS54 KSHV 250724
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
224 AM CDT MON APR 25 2011

ARC061-081-133-250730-
/O.CAN.KSHV.SV.W.0113.000000T0000Z-110425T0730Z/
LITTLE RIVER AR-SEVIER AR-HOWARD AR-
224 AM CDT MON APR 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR HOWARD...SEVIER AND LITTLE
RIVER COUNTIES IS CANCELLED...

THUNDERSTORMS HAVE MOVED EAST OF THE AREA.

LAT...LON 3364 9383 3399 9371 3395 9354 3397 9337
      3392 9330 3385 9328 3380 9311 3378 9312
TIME...MOT...LOC 0720Z 271DEG 48KT 3427 9331 3417 9325
          3407 9320 3398 9325 3371 9351

$$

ARC057-099-250730-
/O.CON.KSHV.SV.W.0113.000000T0000Z-110425T0730Z/
NEVADA AR-HEMPSTEAD AR-
224 AM CDT MON APR 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR HEMPSTEAD AND NEVADA COUNTIES...

AT 214 AM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A LINE OF SEVERE THUNDERSTORMS
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 27 MILES NORTHEAST OF
MCCASKILL TO EAST OF BLEVINS...AND TO NEAR OAKHAVEN...MOVING EAST AT 
55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO EMMET
AND PRESCOTT

LAT...LON 3364 9383 3399 9371 3395 9354 3397 9337
      3392 9330 3385 9328 3380 9311 3378 9312
TIME...MOT...LOC 0720Z 271DEG 48KT 3427 9331 3417 9325
          3407 9320 3398 9325 3371 9351

$$

06

035 
WWUS54 KSHV 250737
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
237 AM CDT MON APR 25 2011

ARC057-099-250747-
/O.EXP.KSHV.SV.W.0113.000000T0000Z-110425T0730Z/
NEVADA AR-HEMPSTEAD AR-
237 AM CDT MON APR 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR HEMPSTEAD AND NEVADA COUNTIES
HAS EXPIRED...

THE STRONGER THUNDERSTORMS HAVE MOVED EAST OUT OF THE AREA. 

LAT...LON 3364 9383 3399 9371 3395 9354 3397 9337
      3392 9330 3385 9328 3380 9311 3378 9312
TIME...MOT...LOC 0724Z 271DEG 48KT 3416 9324 3406 9319
          3396 9314 3387 9319 3361 9346

$$

06

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, 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, 5:27 PM CDT	Tornado Warning	SHV	Little River, Sevier	33 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

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.