Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 10, NWS Tulsa, OK

February 28, 2012Benton County, Arkansas; Delaware County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 28, 2012, 11:53 PM CST for Benton County, Arkansas; Delaware County, Oklahoma. It was in force for 52 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
Feb 28, 2012, 11:53 PM CST (05:53 UTC)
Expired
Feb 29, 2012, 12:45 AM CST
In force
52 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Benton County, AR, Delaware County, OK

The radar

The Tulsa radar (KINX), 83 km from the middle of the area, began a volume at 05:54 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.

IssuedProductOfficeLasted
Feb 28, 10:30 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.9 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2012-02-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 75 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2012-02-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 482 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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.

907 
WUUS54 KTSA 290553
SVRTSA
ARC007-OKC041-290645-
/O.NEW.KTSA.SV.W.0010.120229T0553Z-120229T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1153 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL DELAWARE COUNTY IN NORTHEAST OKLAHOMA
  NORTHWESTERN BENTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 1245 AM CST

* AT 1150 PM CST...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES SOUTH OF
  CHLOETA...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...JAY...
  MAYSVILLE AND GRAVETTE.

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 3651 9461 3650 9414 3627 9499 3638 9501
      3646 9500 3659 9461
TIME...MOT...LOC 0553Z 250DEG 56KT 3639 9491

$$
2 follow-up statements
033 
WWUS54 KTSA 290636
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1236 AM CST WED FEB 29 2012

ARC007-OKC041-290645-
/O.CON.KTSA.SV.W.0010.000000T0000Z-120229T0645Z/
BENTON AR-DELAWARE OK-
1236 AM CST WED FEB 29 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CST
FOR CENTRAL DELAWARE AND NORTHWESTERN BENTON COUNTIES...

AT 1233 AM CST...A SEVERE THUNDERSTORM WAS LOCATED NEAR LAKE EUCHA
STATE PARK...MOVING EAST AT 65 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
MAYSVILLE...GRAVETTE AND SULPHUR SPRINGS.

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 3633 9493 3641 9485 3654 9462 3651 9461
      3650 9414 3629 9492
TIME...MOT...LOC 0636Z 250DEG 57KT 3640 9471

$$
104 
WWUS54 KTSA 290642
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1242 AM CST WED FEB 29 2012

ARC007-OKC041-290652-
/O.EXP.KTSA.SV.W.0010.000000T0000Z-120229T0645Z/
BENTON AR-DELAWARE OK-
1242 AM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL DELAWARE AND
NORTHWESTERN BENTON COUNTIES EXPIRES AT 1245 AM CST...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 5 AM.

LAT...LON 3633 9493 3641 9485 3654 9462 3651 9461
      3650 9414 3629 9492
TIME...MOT...LOC 0642Z 250DEG 57KT 3643 9460

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 29, 12:25 AM CSTTornado WarningTSABenton15 min
Feb 29, 12:36 AM CSTSevere Thunderstorm WarningTSAWashington39 min
Feb 29, 12:56 AM CSTSevere Thunderstorm WarningTSABenton, Washington33 min
Feb 29, 1:09 AM CSTSevere Thunderstorm WarningTSAMadison, Washington33 min
Feb 29, 1:28 AM CSTTornado WarningTSACarroll, Madison, Washington32 min
Feb 29, 1:45 AM CSTSpecial Weather StatementTSAWashington30 min
Feb 29, 1:56 AM CSTSevere Thunderstorm WarningTSAMadison34 min
Feb 29, 1:58 AM CSTSevere Thunderstorm WarningTSACarroll, Madison15 min
Feb 28, 9:01 PM CSTSevere Thunderstorm WarningTSAOsage44 min
Feb 28, 9:41 PM CSTSevere Thunderstorm WarningTSANowata, Osage, Pawnee, Washington64 min
Feb 28, 10:15 PM CSTSpecial Weather StatementTSACreek, Tulsa30 min
Feb 28, 10:31 PM CSTSpecial Weather StatementTSACreek, Okmulgee, Tulsa29 min
Feb 28, 10:47 PM CSTSevere Thunderstorm WarningTSACraig, Nowata, Ottawa, Washington58 min
Feb 28, 10:57 PM CSTSevere Thunderstorm WarningTSAMayes, Rogers, Tulsa, Wagoner48 min
Feb 28, 11:31 PM CSTSevere Thunderstorm WarningTSACraig, Delaware, Mayes30 min
Feb 28, 11:44 PM CSTSevere Thunderstorm WarningTSAOttawa20 min
Feb 28, 11:48 PM CSTSpecial Weather StatementTSAWagoner27 min
Feb 28, 11:57 PM CSTSevere Thunderstorm WarningTSACherokee, Muskogee, Wagoner48 min
Feb 29, 12:28 AM CSTSpecial Weather StatementTSAPittsburg32 min
Feb 29, 12:58 AM CSTSpecial Weather StatementTSALatimer32 min
Feb 29, 4:14 AM CSTFire Weather WatchTSACraig, Creek, Delaware, Mayes, Nowata, Okfuskee and 7 more23 hr
Feb 29, 4:14 AM CSTRed Flag WarningTSACraig, Nowata, Ottawa14 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2012Severe Thunderstorm Warnings in Oklahoma, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.