Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 29, NWS Tulsa, OK

April 3, 2012Crawford County, Sebastian County, Arkansas; LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 3, 2012, 6:44 PM CDT for Crawford County, Sebastian County, Arkansas; LeFlore County, Sequoyah County, Oklahoma. It was in force for 46 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 3, 2012, 6:44 PM CDT (23:44 UTC)
Expired
Apr 3, 2012, 7:30 PM CDT
In force
46 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Crawford County, AR, Sebastian County, AR, LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 13 km from the middle of the area, began a volume at 23:46 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

TimeReportWhereRemark
Apr 3, 7:04 PM CDTTSTM WND DMGArkoma, OKSMALL TREES DOWN IN ARKOMA. TIME ESTIMATED.
Apr 3, 7:04 PM CDTTSTM WND GST 60Arkoma, OKTIME ESTIMATED.
Apr 3, 7:18 PM CDTTSTM WND DMGFort Smith, ARTRANSFORMER BLOWN, NUMEROUS POWER POLES AND LINES DOWN.
Apr 3, 7:24 PM CDTTSTM WND GST 60Fort Smith, ARHWY 540 AND FREE FERRY RD.
Apr 3, 7:24 PM CDTHAIL 1Fort Smith, ARHWY 540 AND FREE FERRY RD.

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.

IssuedProductOfficeLasted
Apr 3, 3:43 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.7 hours before the alert went out and 183 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 2012-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 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 2012-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -81 square meters per square second.193958Sfc1 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
7 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
803 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-81 m²/s²
0-3 km storm-relative helicity
123 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.

494 
WUUS54 KTSA 032344
SVRTSA
ARC033-131-OKC079-135-040030-
/O.NEW.KTSA.SV.W.0029.120403T2344Z-120404T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
644 PM CDT TUE APR 3 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  SOUTHWESTERN CRAWFORD COUNTY IN NORTHWEST ARKANSAS
  NORTHEASTERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA
  NORTHERN SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS

* UNTIL 730 PM CDT

* AT 641 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES NORTH OF
  PANAMA...MOVING NORTHEAST AT 40 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...SPIRO...
  POCOLA...BONANZA...ROLAND...ARKOMA...JENNY LIND...MOFFETT...FORT
  SMITH...BARLING...VAN BUREN AND LAVACA.

THIS INCLUDES INTERSTATE 40 IN OKLAHOMA BETWEEN MILE MARKERS 318 AND
328.

THIS INCLUDES INTERSTATE 40 IN ARKANSAS BETWEEN MILE MARKERS 0 AND 7.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3555 9442 3533 9412 3509 9467 3524 9481
TIME...MOT...LOC 2344Z 231DEG 35KT 3522 9464

$$
1 follow-up statement
886 
WWUS54 KTSA 040014
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
714 PM CDT TUE APR 3 2012

ARC033-131-OKC079-135-040030-
/O.CON.KTSA.SV.W.0029.000000T0000Z-120404T0030Z/
CRAWFORD AR-SEBASTIAN AR-LE FLORE OK-SEQUOYAH OK-
714 PM CDT TUE APR 3 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN SEQUOYAH...NORTHEASTERN LE FLORE...NORTHERN SEBASTIAN
AND SOUTHWESTERN CRAWFORD COUNTIES...

AT 709 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR FORT SMITH...
MOVING NORTHEAST AT 40 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...CENTRAL
CITY...VAN BUREN...SHIBLEY AND LAVACA.

THIS INCLUDES INTERSTATE 40 IN OKLAHOMA BETWEEN MILE MARKERS 319 AND
328.

THIS INCLUDES INTERSTATE 40 IN ARKANSAS BETWEEN MILE MARKERS 0 AND 7.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. TAKE COVER
ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3517 9449 3531 9472 3555 9442 3533 9412
TIME...MOT...LOC 0014Z 231DEG 35KT 3540 9436

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 7:00 AM CDTSpecial Weather StatementTSAPittsburg60 min
Apr 3, 7:27 AM CDTSpecial Weather StatementTSAPittsburg63 min
Apr 3, 8:00 AM CDTAreal Flood AdvisoryTSAHaskell, Latimer, Pittsburg, Pushmataha60 min
Apr 3, 9:04 AM CDTAreal Flood AdvisoryTSAHaskell, Latimer, LeFlore, Pushmataha116 min
Apr 3, 4:01 PM CDTSpecial Weather StatementTSAPittsburg44 min
Apr 3, 4:50 PM CDTSpecial Weather StatementTSAPittsburg40 min
Apr 3, 5:33 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer42 min
Apr 3, 6:09 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore36 min
Apr 3, 6:24 PM CDTSpecial Weather StatementTSAHaskell51 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.