Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 83, NWS Tulsa, OK

May 1, 2002Okmulgee County, Tulsa County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 1, 2002, 11:26 PM CDT for Okmulgee County, Tulsa County, Oklahoma. It was in force for 49 min. 4 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, 11:26 PM CDT (04:26 UTC)
Expired: May 2, 2002, 12:15 AM CDT
In force: 49 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Okmulgee County, OK, Tulsa County, OK

The radar

The Tulsa radar (KINX), 46 km from the middle of the area, began a volume at 04:26 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
May 1, 11:30 PM CDT	Hail 1	Hector, OK
May 1, 11:41 PM CDT	Hail 0.75	Bixby, OK
May 1, 11:50 PM CDT	Hail 3.5	Leonard, OK
May 2, 12:00 AM CDT	Hail 0.75	Jenks, OK

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

Norman, OK (KOUN), launched 00:00Z, 4.4 hours before the alert went out and 151 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: 43 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 3005 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 020426
SVRTUL
OKC111-143-020515-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1125 PM CDT WED MAY 1 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN OKMULGEE COUNTY IN NORTHEAST OKLAHOMA
  SOUTHERN TULSA COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1215 AM CDT

* AT 1125 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8
  MILES SOUTHWEST OF BIXBY...MOVING EAST AT 40 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BIXBY...JENKS
  AND GLENPOOL.

HAIL TO THE SIZE OF NICKELS CAN BE EXPECTED IN THE WARNED AREA. STAY 
INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3602 9603 3589 9606 3575 9610 3578 9577
          3601 9576

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 8:29 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	46 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, 11:37 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 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.