Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 85, NWS Tulsa, OK

May 1, 2002Wagoner County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 1, 2002, 11:49 PM CDT for Wagoner County, Oklahoma. It was in force for 41 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: May 1, 2002, 11:49 PM CDT (04:49 UTC)
Expired: May 2, 2002, 12:30 AM CDT
In force: 41 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Wagoner County, OK

The radar

The Tulsa radar (KINX), 19 km from the middle of the area, began a volume at 04:51 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, 11:55 PM CDT	Hail 1.75	Coweta, 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

Lamont, OK (KLMN), launched 00:00Z, 4.8 hours before the alert went out and 181 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: 48 J/kg
Mixed-layer CIN: -349 J/kg
Mixed-layer LCL: 1619 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 020449
SVRTUL
OKC145-020530-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1148 PM CDT WED MAY 1 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WAGONER COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1230 AM CDT

* AT 1148 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10
  MILES SOUTHWEST OF ONETA...MOVING EAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...COWETA AND
  ONETA.

HAIL TO THE SIZE OF TENNIS BALLS WILL BE POSSIBLE IN THE WARNED 
AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3602 9576 3588 9576 3602 9521 3611 9556

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, 11:26 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee, Tulsa	49 min
May 1, 11:37 PM CDT	Severe Thunderstorm Warning	TSA	Creek	23 min
May 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.