Alert archive / Oklahoma / Tornado Warnings in 2001

Tornado Warning 2, NWS Tulsa, OK

May 6, 2001Tulsa County, Oklahoma

NWS Tulsa, OK issued this tornado warning at May 6, 2001, 5:29 PM CDT for Tulsa County, Oklahoma. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: May 6, 2001, 5:29 PM CDT (22:29 UTC)
Expired: May 6, 2001, 6:00 PM CDT
In force: 31 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Tulsa County, OK

The radar

The Tulsa radar (KINX), 37 km from the middle of the area, began a volume at 22:29 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 6, 6:05 PM CDT	Hail 1.75	Owasso, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 6, 2:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 10.5 hours before the alert went out and 142 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: 974 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 677 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KTSA 062230
TORTUL
OKC143-062300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
529 PM CDT SUN MAY 6 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR
  NORTHERN TULSA COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 600 PM CDT

* AT 529 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH
  STRONG ROTATION 4 MILES SOUTH OF SPERRY...MOVING EAST AT 10 MPH.
  THIS DANGEROUS STORM COULD PRODUCE A TORNADO AT ANY TIME.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...SPERRY AND
  OWASSO.

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS

THIS IS A VERY DANGEROUS STORM. IF YOU ARE NEAR ITS PATH YOU SHOULD
PREPARE FOR LARGE DAMAGING HAIL...VIOLENT STRAIGHT LINE WINDS AND
POSSIBLY A TORNADO. IF NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER
ON THE LOWEST FLOOR IN AN INTERIOR ROOM AWAY FROM WINDOWS.

LAT...LON 3631 9607 3616 9605 3614 9582 3631 9581

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 2:31 PM CDT	Severe Thunderstorm Warning	TSA	Osage	44 min
May 6, 4:01 PM CDT	Severe Thunderstorm Warning	TSA	Osage	44 min
May 6, 4:18 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	27 min
May 6, 4:47 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa, Washington	58 min
May 6, 5:19 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	56 min
May 6, 5:57 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	63 min
May 6, 6:00 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	60 min
May 6, 6:26 PM CDT	Severe Thunderstorm Warning	TSA	Mayes	49 min
May 6, 6:58 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	62 min

Nearby

Tornado Warnings in Oklahoma, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.