Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 15, NWS Tulsa, OK

February 29, 2012Madison County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 29, 2012, 1:56 AM CST for Madison County, Arkansas. It was in force for 34 min. 4 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: Feb 29, 2012, 1:56 AM CST (07:56 UTC)
Expired: Feb 29, 2012, 2:30 AM CST
In force: 34 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Madison County, AR

The radar

The Western Arkansas radar (KSRX), 111 km from the middle of the area, began a volume at 07:59 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
Feb 29, 2:00 AM CST	HAIL 1.5	2 Sw Kingston, AR
Feb 29, 2:08 AM CST	HAIL 1.5	Aurora, AR
Feb 29, 2:14 AM CST	HAIL 1.5	2 Sw Kingston, AR
Feb 29, 2:20 AM CST	HAIL 2.5	Kingston, AR	RELAYED BY KNWA

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
Feb 28, 10:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 7.9 hours before the alert went out and 95 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: 75 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 595 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 482 m²/s²
0-3 km storm-relative helicity: 563 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

111 
WUUS54 KTSA 290756
SVRTSA
ARC087-290830-
/O.NEW.KTSA.SV.W.0015.120229T0756Z-120229T0830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
156 AM CST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MADISON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 230 AM CST

* AT 155 AM CST...A SEVERE THUNDERSTORM WAS LOCATED NEAR WESLEY...
  MOVING EAST AT 65 MPH.

  STORM HAZARDS INCLUDE...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  JAPTON...WITTER...AURORA...HUNTSVILLE...WITHROW SPRINGS STATE
  PARK...MARBLE AND KINGSTON.

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 3595 9347 3590 9351 3589 9395 3608 9394
      3621 9364 3617 9358 3615 9358 3615 9355
      3612 9355 3613 9350 3611 9347 3604 9344
TIME...MOT...LOC 0756Z 250DEG 57KT 3600 9389

$$

2 follow-up statements

036 
WWUS54 KTSA 290808
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
208 AM CST WED FEB 29 2012

ARC087-290830-
/O.CON.KTSA.SV.W.0015.000000T0000Z-120229T0830Z/
MADISON AR-
208 AM CST WED FEB 29 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CST FOR
CENTRAL MADISON COUNTY...

AT 207 AM CST...A SEVERE THUNDERSTORM WAS LOCATED NEAR AURORA...
MOVING EAST AT 65 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ALABAM...
WEATHERS...MARBLE AND KINGSTON.

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 3595 9347 3590 9351 3590 9377 3614 9376
      3621 9364 3617 9358 3615 9358 3615 9355
      3612 9355 3613 9349 3611 9347 3604 9344
TIME...MOT...LOC 0809Z 250DEG 57KT 3601 9365

$$

230 
WWUS54 KTSA 290827
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
227 AM CST WED FEB 29 2012

ARC087-290837-
/O.EXP.KTSA.SV.W.0015.000000T0000Z-120229T0830Z/
MADISON AR-
227 AM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MADISON COUNTY EXPIRES
AT 230 AM CST...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 5 AM.

LAT...LON 3595 9347 3590 9351 3590 9377 3614 9376
      3621 9364 3617 9358 3615 9358 3615 9355
      3612 9355 3613 9349 3611 9347 3604 9344
TIME...MOT...LOC 0827Z 250DEG 57KT 3611 9332

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 11:53 PM CST	Severe Thunderstorm Warning	TSA	Benton	52 min
Feb 29, 12:25 AM CST	Tornado Warning	TSA	Benton	15 min
Feb 29, 12:36 AM CST	Severe Thunderstorm Warning	TSA	Washington	39 min
Feb 29, 12:56 AM CST	Severe Thunderstorm Warning	TSA	Benton, Washington	33 min
Feb 29, 1:09 AM CST	Severe Thunderstorm Warning	TSA	Madison, Washington	33 min
Feb 29, 1:28 AM CST	Tornado Warning	TSA	Carroll, Madison, Washington	32 min
Feb 29, 1:45 AM CST	Special Weather Statement	TSA	Washington	30 min
Feb 29, 1:58 AM CST	Severe Thunderstorm Warning	TSA	Carroll, Madison	15 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2012 Every severe thunderstorm warning in 2012

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.