Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 85, NWS Tulsa, OK

April 19, 2011Benton County, Carroll County, Madison County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 19, 2011, 4:33 PM CDT for Benton County, Carroll County, Madison County, Arkansas. It was in force for 57 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 19, 2011, 4:33 PM CDT (21:33 UTC)
Expired: Apr 19, 2011, 5:30 PM CDT
In force: 57 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Benton County, AR, Carroll County, AR, Madison County, AR

The radar

The Springfield radar (KSGF), 100 km from the middle of the area, began a volume at 21:34 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
Apr 19, 4:45 PM CDT	HAIL 1.75	Eureka Springs, AR
Apr 19, 4:55 PM CDT	HAIL 2.75	Grandview, AR
Apr 19, 4:58 PM CDT	HAIL 1.25	Berryville, AR
Apr 19, 5:30 PM CDT	HAIL 1.25	Rockhouse, AR
Apr 19, 5:35 PM CDT	HAIL 1	Berryville, AR

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 19, 2:16 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.6 hours before the alert went out and 64 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: 2616 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 820 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 583 m²/s²
0-3 km storm-relative helicity: 584 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

408 
WUUS54 KTSA 192133
SVRTSA
ARC007-015-087-192230-
/O.NEW.KTSA.SV.W.0085.110419T2133Z-110419T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
433 PM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BENTON COUNTY IN NORTHWEST ARKANSAS
  NORTHERN CARROLL COUNTY IN NORTHWEST ARKANSAS
  NORTHERN MADISON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 530 PM CDT

* AT 430 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 4 MILES WEST OF EUREKA SPRINGS TO WAR EAGLE...MOVING
  NORTHEAST AT 45 MPH.

  STORM HAZARDS INCLUDE...
  HALF DOLLAR SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  CLIFTY...EUREKA SPRINGS...GRANDVIEW...BERRYVILLE...URBANETTE...
  GREEN FOREST AND OAK GROVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM
WINDOWS.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3624 9368 3623 9388 3624 9397 3650 9372
      3650 9330 3649 9329 3634 9329
TIME...MOT...LOC 2133Z 238DEG 38KT 3643 9377 3628 9391

$$

3 follow-up statements

391 
WWUS54 KTSA 192140
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
440 PM CDT TUE APR 19 2011

ARC007-015-087-192230-
/O.CON.KTSA.SV.W.0085.000000T0000Z-110419T2230Z/
CARROLL AR-BENTON AR-MADISON AR-
440 PM CDT TUE APR 19 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHERN MADISON...EASTERN BENTON AND NORTHERN CARROLL COUNTIES...

AT 439 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM OAK HILL TO LOOKOUT...MOVING NORTHEAST AT 45 MPH.

STORM HAZARDS INCLUDE...
DAMAGING GOLF BALL SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...OAK
HILL...EUREKA SPRINGS...PLEASANT RIDGE...ROCKHOUSE...GRANDVIEW...
BERRYVILLE...URBANETTE...GREEN FOREST...COIN...OAK GROVE AND DENVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3624 9368 3623 9388 3624 9397 3650 9372
      3650 9330 3649 9329 3634 9329
TIME...MOT...LOC 2141Z 238DEG 38KT 3646 9370 3632 9382

$$

567 
WWUS54 KTSA 192151
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
451 PM CDT TUE APR 19 2011

ARC007-192201-
/O.CAN.KTSA.SV.W.0085.000000T0000Z-110419T2230Z/
BENTON AR-
451 PM CDT TUE APR 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BENTON COUNTY IS
CANCELLED...

LAT...LON 3624 9368 3632 9379 3640 9376 3650 9372
      3650 9330 3649 9329 3634 9329
TIME...MOT...LOC 2151Z 238DEG 38KT 3645 9360 3634 9371

$$

ARC015-087-192230-
/O.CON.KTSA.SV.W.0085.000000T0000Z-110419T2230Z/
CARROLL AR-MADISON AR-
451 PM CDT TUE APR 19 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHERN MADISON AND NORTHERN CARROLL COUNTIES...

AT 448 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM GRANDVIEW TO ROCKHOUSE...MOVING NORTHEAST AT 45 MPH.

STORM HAZARDS INCLUDE...
HALF DOLLAR SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
BERRYVILLE...URBANETTE...GREEN FOREST...COIN...OAK GROVE AND DENVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3624 9368 3632 9379 3640 9376 3650 9372
      3650 9330 3649 9329 3634 9329
TIME...MOT...LOC 2151Z 238DEG 38KT 3645 9360 3634 9371

$$

392 
WWUS54 KTSA 192200
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
500 PM CDT TUE APR 19 2011

ARC087-192210-
/O.CAN.KTSA.SV.W.0085.000000T0000Z-110419T2230Z/
MADISON AR-
500 PM CDT TUE APR 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MADISON COUNTY IS
CANCELLED...

LAT...LON 3637 9355 3636 9367 3650 9363 3650 9330
      3649 9329 3641 9329
TIME...MOT...LOC 2200Z 238DEG 38KT 3649 9349 3640 9362

$$

ARC015-192230-
/O.CON.KTSA.SV.W.0085.000000T0000Z-110419T2230Z/
CARROLL AR-
500 PM CDT TUE APR 19 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHEASTERN CARROLL COUNTY...

AT 458 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM OAK GROVE TO GRANDVIEW...MOVING NORTHEAST AT 45 MPH.

STORM HAZARDS INCLUDE...
HALF DOLLAR SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...URBANETTE
AND OAK GROVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3637 9355 3636 9367 3650 9363 3650 9330
      3649 9329 3641 9329
TIME...MOT...LOC 2200Z 238DEG 38KT 3649 9349 3640 9362

$$

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 19, 4:03 PM CDT	Special Weather Statement	TSA	Benton	27 min
Apr 19, 4:09 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	66 min
Apr 19, 4:19 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Madison, Washington	56 min
Apr 19, 5:01 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	59 min
Apr 19, 5:05 PM CDT	Tornado Warning	TSA	Carroll, Madison, Washington	25 min
Apr 19, 5:06 PM CDT	Tornado Warning	TSA	Carroll	24 min
Apr 19, 6:06 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Madison, Washington	24 min
Apr 19, 6:44 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	21 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.