Alert archive / Arkansas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 78, NWS Tulsa, OK

May 1, 2002Benton County, Arkansas; Delaware County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 1, 2002, 8:29 PM CDT for Benton County, Arkansas; Delaware County, Oklahoma. It was in force for 46 min. 2 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: May 1, 2002, 8:29 PM CDT (01:29 UTC)
Expired: May 1, 2002, 9:15 PM CDT
In force: 46 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Benton County, AR, Delaware County, OK

The radar

The Tulsa radar (KINX), 89 km from the middle of the area, began a volume at 01:30 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

Time	Report	Where	Remark
May 1, 8:35 PM CDT	Hail 0.75	Siloam Spgs, AR
May 1, 8:43 PM CDT	Hail 0.88	Siloam Spgs, AR

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.5 hours before the alert went out and 99 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1175 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1882 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 020129
SVRTUL
ARC007-OKC041-020215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
828 PM CDT WED MAY 1 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 915 PM CDT

* AT 828 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5   
MILES SOUTH OF COLCORD...MOVING EAST AT 45 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...KANSAS...
  COLCORD...BENTONVILLE...GENTRY...SPRINGTOWN...HIGHFILL...CAVE
  SPRINGS...DECATUR...HIWASSE AND BELLA VISTA.

HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 MPH CAN BE 
EXPECTED IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS 
UNTIL THE STORM HAS PASSED.

LAT...LON 3624 9485 3615 9480 3621 9419 3651 9422

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 8:44 PM CDT	Tornado Warning	TSA	Benton	31 min
May 1, 8:54 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	51 min
May 1, 9:00 PM CDT	Tornado Warning	TSA	Washington	45 min
May 1, 9:12 PM CDT	Severe Thunderstorm Warning	TSA	Benton	33 min
May 1, 9:33 PM CDT	Tornado Warning	TSA	Madison	42 min
May 1, 10:44 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	46 min
May 2, 1:15 AM CDT	Severe Thunderstorm Warning	TSA	Washington	45 min
May 2, 1:38 AM CDT	Tornado Warning	TSA	Washington	37 min
May 2, 1:55 AM CDT	Severe Thunderstorm Warning	TSA	Madison	50 min
May 2, 2:03 AM CDT	Tornado Warning	TSA	Madison	42 min
May 1, 9:17 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	28 min
May 1, 9:28 PM CDT	Tornado Warning	TSA	Adair, Cherokee	32 min
May 1, 11:26 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee, Tulsa	49 min
May 1, 11:37 PM CDT	Severe Thunderstorm Warning	TSA	Creek	23 min
May 1, 11:49 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	41 min
May 2, 12:22 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee	38 min
May 2, 12:51 AM CDT	Severe Thunderstorm Warning	TSA	Mayes	24 min
May 2, 1:01 AM CDT	Severe Thunderstorm Warning	TSA	Adair	44 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2002 Severe Thunderstorm Warnings in Oklahoma, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.