Alert archive / Arkansas / Tornado Warnings in 2011

Tornado Warning 42, NWS Tulsa, OK

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

NWS Tulsa, OK issued this tornado warning at Apr 19, 2011, 5:05 PM CDT for Carroll County, Madison County, Washington County, Arkansas. It was in force for 25 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 19, 2011, 5:05 PM CDT (22:05 UTC)
Expired: Apr 19, 2011, 5:30 PM CDT
In force: 25 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Carroll County, AR, Madison County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 113 km from the middle of the area, began a volume at 22:07 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 19, 5:30 PM CDT	HAIL 1.25	Rockhouse, 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, 10.1 hours before the alert went out and 77 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.

479 
WFUS54 KTSA 192205
TORTSA
ARC015-087-143-192230-
/O.NEW.KTSA.TO.W.0042.110419T2205Z-110419T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
505 PM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL CARROLL COUNTY IN NORTHWEST ARKANSAS
  NORTHERN MADISON COUNTY IN NORTHWEST ARKANSAS
  NORTHEASTERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 530 PM CDT

* AT 502 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 4 MILES NORTHWEST OF HINDSVILLE...MOVING
  NORTHEAST AT 35 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...CLIFTY
  AND FORUM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

&&

LAT...LON 3609 9393 3620 9402 3624 9394 3624 9387
      3628 9386 3638 9364 3618 9355
TIME...MOT...LOC 2205Z 244DEG 33KT 3618 9389

$$

1 follow-up statement

365 
WWUS54 KTSA 192218
SVSTSA

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

ARC143-192228-
/O.CAN.KTSA.TO.W.0042.000000T0000Z-110419T2230Z/
WASHINGTON AR-
518 PM CDT TUE APR 19 2011

...THE TORNADO WARNING FOR NORTHEASTERN WASHINGTON COUNTY IS
CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS MOVED OUT OF THE COUNTY.

LAT...LON 3613 9388 3617 9391 3623 9388 3624 9386
      3628 9386 3638 9364 3618 9355
TIME...MOT...LOC 2218Z 244DEG 33KT 3619 9383

$$

ARC015-087-192230-
/O.CON.KTSA.TO.W.0042.000000T0000Z-110419T2230Z/
CARROLL AR-MADISON AR-
518 PM CDT TUE APR 19 2011

...TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR NORTHERN
MADISON AND CENTRAL CARROLL COUNTIES...

AT 516 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED NEAR
HINDSVILLE...MOVING NORTHEAST AT 40 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...CLIFTY...
FORUM AND ROCKHOUSE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

&&

LAT...LON 3613 9388 3617 9391 3623 9388 3624 9386
      3628 9386 3638 9364 3618 9355
TIME...MOT...LOC 2218Z 244DEG 33KT 3619 9383

$$

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, 4:33 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison	57 min
Apr 19, 5:01 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	59 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

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.