Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 445, NWS Tulsa, OK

July 2, 2011Benton County, Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 2, 2011, 5:31 PM CDT for Benton County, Washington County, Arkansas. It was in force for 29 min. 1 report 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
Jul 2, 2011, 5:31 PM CDT (22:31 UTC)
Expired
Jul 2, 2011, 6:00 PM CDT
In force
29 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Benton County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 96 km from the middle of the area, began a volume at 22:33 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
Jul 2, 5:44 PM CDTTSTM WND GST 601 Ssw Oak Grove, ARTREE LIMBS DOWN ON HIGHWAY 412 1 MILE WEST OF BYPASS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.5 hours before the alert went out and 92 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 2011-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2208 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 2011-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.1939Sfc1 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
2208 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
1414 m above ground
0-6 km bulk shear
2 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
53 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.

838 
WUUS54 KTSA 022231
SVRTSA
ARC007-143-022300-
/O.NEW.KTSA.SV.W.0445.110702T2231Z-110702T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
531 PM CDT SAT JUL 2 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 600 PM CDT

* AT 529 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES SOUTHWEST
  OF SPRINGDALE...MOVING WEST AT 5 MPH.

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

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  TONTITOWN AND CAVE SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF
NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN
AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3608 9438 3629 9434 3625 9406 3606 9410
TIME...MOT...LOC 2232Z 097DEG 4KT 3617 9418

$$
2 follow-up statements
306 
WWUS54 KTSA 022245
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
545 PM CDT SAT JUL 2 2011

ARC007-143-022300-
/O.CON.KTSA.SV.W.0445.000000T0000Z-110702T2300Z/
BENTON AR-WASHINGTON AR-
545 PM CDT SAT JUL 2 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR
NORTHERN WASHINGTON AND SOUTHERN BENTON COUNTIES...

AT 542 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR OAK GROVE AND
WAS NEARLY STATIONARY.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...OAK
GROVE...ELM SPRINGS...TONTITOWN...WHEELER...SAVOY...CAVE SPRINGS...
HEALING SPRINGS...HARMON AND ROCKY COMFORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF
NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN
AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3608 9438 3629 9434 3625 9406 3606 9410
TIME...MOT...LOC 2246Z 110DEG 2KT 3617 9417

$$
870 
WWUS54 KTSA 022257
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
557 PM CDT SAT JUL 2 2011

ARC007-143-022307-
/O.EXP.KTSA.SV.W.0445.000000T0000Z-110702T2300Z/
BENTON AR-WASHINGTON AR-
557 PM CDT SAT JUL 2 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WASHINGTON AND
SOUTHERN BENTON COUNTIES EXPIRES AT 600 PM CDT...

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

GUSTY WINDS...SMALL HAIL AND HEAVY RAIN WILL STILL BE POSSIBLE WITH
THIS STORM.

LAT...LON 3608 9438 3629 9434 3625 9406 3606 9410
TIME...MOT...LOC 2257Z 110DEG 2KT 3617 9418

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 2:31 PM CDTSpecial Weather StatementTSACarroll29 min
Jul 2, 3:06 PM CDTSpecial Weather StatementTSACarroll24 min
Jul 2, 3:14 PM CDTSpecial Weather StatementTSASebastian31 min
Jul 2, 3:50 PM CDTSpecial Weather StatementTSAMadison25 min
Jul 2, 3:58 PM CDTSpecial Weather StatementTSACarroll32 min
Jul 2, 4:00 PM CDTSpecial Weather StatementTSAMadison30 min
Jul 2, 4:20 PM CDTSpecial Weather StatementTSAMadison40 min
Jul 2, 4:47 PM CDTSpecial Weather StatementTSAFranklin43 min
Jul 2, 5:01 PM CDTSpecial Weather StatementTSAMadison44 min
Jul 2, 5:21 PM CDTSpecial Weather StatementTSAWashington39 min
Jul 2, 6:07 PM CDTSpecial Weather StatementTSABenton23 min
Jul 2, 6:28 PM CDTSevere Thunderstorm WarningTSABenton23 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011Every severe thunderstorm warning in 2011

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.