Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 99, NWS Tulsa, OK

May 29, 2012Benton County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at May 29, 2012, 11:58 PM CDT for Benton County, Arkansas. It was in force for 30 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
May 29, 2012, 11:58 PM CDT (04:58 UTC)
Expired
May 30, 2012, 12:28 AM CDT
In force
30 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

County Benton County, AR

The radar

The Springfield radar (KSGF), 111 km from the middle of the area, began a volume at 05:01 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.0 hours before the alert went out and 61 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 2012-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 131 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 00:00Z on 2012-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
131 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
2811 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
124 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.

028 
WUUS54 KTSA 300458
SVRTSA
ARC007-300545-
/O.NEW.KTSA.SV.W.0099.120530T0458Z-120530T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1158 PM CDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BENTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 1245 AM CDT

* AT 1156 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES NORTH OF
  HIWASSE...MOVING EAST AT 30 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BELLA
  VISTA...PEA RIDGE...GARFIELD AND GATEWAY.

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 3636 9389 3641 9452 3651 9452 3650 9387
TIME...MOT...LOC 0458Z 269DEG 25KT 3648 9430

$$
3 follow-up statements
717 
WWUS54 KTSA 300512
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1212 AM CDT WED MAY 30 2012

ARC007-300545-
/O.CON.KTSA.SV.W.0099.000000T0000Z-120530T0545Z/
BENTON AR-
1212 AM CDT WED MAY 30 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR NORTHERN BENTON COUNTY...

AT 1206 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR 
HIWASSE...MOVING EAST AT 20 MPH.  THE STORM HAD WEAKENED AND SLOWED 
DOWN...BUT IT COULD STILL PRODUCE HAIL AND STRONG WINDS.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...MILLER...
BELLA VISTA...PEA RIDGE...AVOCA...GARFIELD...GATEWAY...HILL TOP AND
WALNUT HILL.

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 3636 9389 3641 9452 3651 9452 3650 9387
TIME...MOT...LOC 0511Z 269DEG 15KT 3649 9430

$$
423 
WWUS54 KTSA 300520
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1220 AM CDT WED MAY 30 2012

ARC007-300545-
/O.CON.KTSA.SV.W.0099.000000T0000Z-120530T0545Z/
BENTON AR-
1220 AM CDT WED MAY 30 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR NORTHERN BENTON COUNTY...

AT 1215 AM CDT...A SEVERE THUNDERSTORM WAS CENTERED NEAR SULPHUR 
SPRINGS AND HIWASSE...MOVING EAST AT 10 MPH.  THE STORM CONTINUED TO 
SLOW DOWN AND HAS WEAKENED.  IF THE WEAKENING CONTINUES... THE 
WARNING WILL BE CANCELLED EARLY. UNTIL THAT TIME...BE ALERT FOR 
STRONG WINDS AND HAIL WITH THE STORM.

&&

LAT...LON 3642 9448 3650 9451 3650 9387 3636 9389
TIME...MOT...LOC 0518Z 270DEG 10KT 3648 9439

$$
972 
WWUS54 KTSA 300528
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1228 AM CDT WED MAY 30 2012

ARC007-300538-
/O.CAN.KTSA.SV.W.0099.000000T0000Z-120530T0545Z/
BENTON AR-
1228 AM CDT WED MAY 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BENTON COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3642 9448 3650 9451 3650 9387 3636 9389
TIME...MOT...LOC 0528Z 267DEG 3KT 3648 9443

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 11:17 PM CDTSpecial Weather StatementTSACrawford, Sebastian58 min
May 29, 11:53 PM CDTSpecial Weather StatementTSABenton52 min
May 30, 12:27 AM CDTSpecial Weather StatementTSACarroll, Franklin, Madison63 min
May 30, 1:59 AM CDTSpecial Weather StatementTSAMadison31 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 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.