Alert archive / Arkansas / Tornado Warnings in 2012

Tornado Warning 11, NWS Tulsa, OK

April 15, 2012Benton County, Washington County, Arkansas; Adair County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 15, 2012, 9:42 AM CDT for Benton County, Washington County, Arkansas; Adair County, Oklahoma. It was in force for 33 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 15, 2012, 9:42 AM CDT (14:42 UTC)
Expired
Apr 15, 2012, 10:15 AM CDT
In force
33 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Benton County, AR, Washington County, AR, Adair County, OK

The radar

The Tulsa radar (KINX), 89 km from the middle of the area, began a volume at 14:42 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
Apr 15, 6:38 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 2.7 hours before the alert went out and 114 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 12:00Z on 2012-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2012-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.1939587897Sfc1 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
31 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
855 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
381 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

893 
WFUS54 KTSA 151442
TORTSA
ARC007-143-OKC001-151515-
/O.NEW.KTSA.TO.W.0011.120415T1442Z-120415T1515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
942 AM CDT SUN APR 15 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN ADAIR COUNTY IN NORTHEAST OKLAHOMA
  SOUTHWESTERN BENTON COUNTY IN NORTHWEST ARKANSAS
  WESTERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 1015 AM CDT

* AT 938 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 4 MILES SOUTH OF PROCTOR...MOVING NORTHEAST AT
  40 MPH. THIS IS A DANGEROUS STORM WITH STRONG LOW LEVEL ROTATION...
  A TORNADO IS OCCURRING OR COULD FORM AT ANY TIME.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  CHRISTIE...WESTVILLE...CINCINNATI...WATTS AND SILOAM SPRINGS.

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!

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

&&

LAT...LON 3613 9430 3583 9479 3595 9480 3600 9480
      3617 9458 3616 9457 3618 9457 3626 9445
TIME...MOT...LOC 1442Z 225DEG 35KT 3593 9475

$$
1 follow-up statement
351 
WWUS54 KTSA 151455
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
955 AM CDT SUN APR 15 2012

ARC007-143-OKC001-151515-
/O.CON.KTSA.TO.W.0011.000000T0000Z-120415T1515Z/
BENTON AR-WASHINGTON AR-ADAIR OK-
955 AM CDT SUN APR 15 2012

...TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT FOR
NORTHEASTERN ADAIR...WESTERN WASHINGTON AND SOUTHWESTERN BENTON
COUNTIES...

AT 951 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED 6 MILES WEST OF 
WESTVILLE...MOVING NORTHEAST AT 35 MPH. DAMAGE HAS BEEN REPORTED 
FROM THIS STORM IN CHEROKEE COUNTY.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
WESTVILLE...BALLARD...CINCINNATI...WATTS...LAKE FRANCIS...
WEDINGTON...GALLITIN...SILOAM SPRINGS AND FAIRMOUNT.

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 3625 9445 3612 9432 3593 9463 3592 9465
      3604 9474 3616 9458 3616 9457 3618 9457
      3624 9448 3626 9446
TIME...MOT...LOC 1455Z 231DEG 31KT 3600 9465

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 9:13 AM CDTSevere Thunderstorm WarningTSABenton, Washington62 min
Apr 15, 10:13 AM CDTSevere Thunderstorm WarningTSABenton, Carroll, Washington24 min
Apr 15, 11:28 AM CDTSpecial Weather StatementTSASebastian62 min
Apr 15, 12:25 PM CDTSevere Thunderstorm WarningTSABenton, Madison, Washington35 min
Apr 15, 12:29 PM CDTSpecial Weather StatementTSACrawford31 min
Apr 15, 1:04 PM CDTSpecial Weather StatementTSACarroll26 min
Apr 15, 1:14 PM CDTSpecial Weather StatementTSAWashington31 min
Apr 15, 1:19 PM CDTSevere Thunderstorm WarningTSABenton, Carroll, Washington26 min
Apr 15, 1:48 PM CDTSpecial Weather StatementTSAFranklin27 min
Apr 15, 1:53 PM CDTSpecial Weather StatementTSACarroll, Madison52 min
Apr 15, 2:10 PM CDTSpecial Weather StatementTSAFranklin35 min
Apr 15, 2:32 PM CDTSpecial Weather StatementTSACarroll, Madison43 min
Apr 15, 12:40 AM CDTWind AdvisoryTSACreek, Okfuskee, Okmulgee, Pawnee, Tulsa, Washington3 hr
Apr 15, 3:41 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee64 min
Apr 15, 4:43 AM CDTSevere Thunderstorm WarningTSACreek, Osage, Pawnee62 min
Apr 15, 5:05 AM CDTSpecial Weather StatementTSACreek55 min
Apr 15, 5:30 AM CDTSevere Thunderstorm WarningTSACreek, Nowata, Osage, Pawnee, Rogers, Tulsa and 1 more60 min
Apr 15, 5:47 AM CDTSpecial Weather StatementTSAOkfuskee, Okmulgee, Rogers, Tulsa58 min
Apr 15, 5:51 AM CDTTornado WarningTSANowata, Osage, Rogers, Tulsa, Washington24 min
Apr 15, 6:22 AM CDTSevere Thunderstorm WarningTSACraig, Mayes, Nowata, Ottawa, Rogers53 min
Apr 15, 6:41 AM CDTSpecial Weather StatementTSAMayes, Okmulgee, Wagoner64 min
Apr 15, 6:43 AM CDTSpecial Weather StatementTSAMcIntosh, Pittsburg62 min
Apr 15, 7:41 AM CDTSpecial Weather StatementTSADelaware34 min
Apr 15, 7:44 AM CDTSpecial Weather StatementTSAMcIntosh, Muskogee, Pittsburg, Wagoner31 min
Apr 15, 8:13 AM CDTSpecial Weather StatementTSACherokee, Delaware, Muskogee62 min
Apr 15, 8:14 AM CDTSpecial Weather StatementTSAHaskell, Latimer, Pittsburg, Pushmataha, Sequoyah61 min
Apr 15, 9:16 AM CDTTornado WarningTSAAdair, Cherokee29 min
Apr 15, 12:42 PM CDTRiver Flood WarningTSARogers, Tulsa7 hr

Nearby

Tornado Warnings in Arkansas, 2012Tornado Warnings in Oklahoma, 2012Every tornado warning in 2012Tornadoes 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.