Alert archive / Oklahoma / Tornado Warnings in 2002

Tornado Warning 31, NWS Norman, OK

May 8, 2002Grant County, Oklahoma

NWS Norman, OK issued this tornado warning at May 8, 2002, 6:24 PM CDT for Grant County, Oklahoma. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 8, 2002, 6:24 PM CDT (23:24 UTC)
Expired: May 8, 2002, 6:45 PM CDT
In force: 21 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Grant County, OK

The radar

The Vance AFB radar (KVNX), 43 km from the middle of the area, began a volume at 23:28 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.

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 8, 3:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.4 hours before the alert went out and 194 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: 1553 J/kg
Mixed-layer CIN: -331 J/kg
Mixed-layer LCL: 880 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 364 m²/s²
0-3 km storm-relative helicity: 397 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.

000 
WFUS54 KOUN 082324
TOROKC
OKC053-082345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
623 PM CDT WED MAY 8 2002

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN GRANT COUNTY IN NORTHERN OKLAHOMA

* UNTIL 645 PM CDT

* AT 623 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO 5 MILES WEST OF RENFROW...MOVING    
  EAST SOUTHEAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE RENFROW

TAKE COVER NOW. LEAVE MOBILE HOMES AND VEHICLES. IF POSSIBLE...MOVE
TO A BASEMENT OR STORM SHELTER. OTHERWISE MOVE TO AN INTERIOR ROOM OR
HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS AND OUTSIDE
WALLS.

LAT...LON 3700 9788 3690 9787 3684 9747 3699 9747

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 3:18 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	42 min
May 8, 4:01 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	29 min
May 8, 4:31 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	44 min
May 8, 5:15 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	45 min
May 8, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	36 min
May 8, 6:47 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant, Woods	43 min

Nearby

Tornado Warnings in Oklahoma, 2002 Every tornado warning in 2002 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.