Alert archive / Oklahoma / Tornado Warnings in 2002

Tornado Warning 22, NWS Norman, OK

May 5, 2002Ellis County, Roger Mills County, Oklahoma

NWS Norman, OK issued this tornado warning at May 5, 2002, 7:32 PM CDT for Ellis County, Roger Mills County, Oklahoma. It was in force for 43 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 5, 2002, 7:32 PM CDT (00:32 UTC)
Expired: May 5, 2002, 8:15 PM CDT
In force: 43 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

Counties Ellis County, OK, Roger Mills County, OK

The radar

The Amarillo radar (KAMA), 181 km from the middle of the area, began a volume at 00:35 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 5, 7:58 PM CDT	Tornado F0	Arnett, OK	This tornado formed on the Hemphill (Texas)/Ellis (Oklahoma) County line and tracked 1 mile before dissipating. The tornado was seen by several storm chasers; however, no damage occurred.
May 5, 8:00 PM CDT	Hail 1	Arnett, 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 5, 4:45 PM CDT	Tornado Watch	SPC	5 hr
May 5, 7:30 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.5 hours before the alert went out and 199 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: 2199 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1272 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOUN 060032
TOROKC
OKC045-129-060115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
731 PM CDT SUN MAY 5 2002

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN ELLIS COUNTY IN NORTHWEST OKLAHOMA
  NORTHERN ROGER MILLS COUNTY IN WESTERN OKLAHOMA

* UNTIL 815 PM CDT

* AT 731 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO 10 MILES SOUTHWEST OF LAKE LLOYD
  VINCENT...MOVING EAST AT 30 MPH.

IN ADDITION TO A TORNADO THREAT... THIS STORM LIKELY CONTAINS 
DAMAGING HAIL TO THE SIZE OF BASEBALLS OR LARGER.

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 3603 10026 3585 10022 3586 9941 3615 9949

CJS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 8:10 PM CDT	Tornado Warning	OUN	Ellis, Roger Mills	50 min
May 5, 8:37 PM CDT	Tornado Warning	OUN	Dewey	38 min
May 5, 8:39 PM CDT	Tornado Warning	OUN	Dewey	36 min
May 5, 9:12 PM CDT	Tornado Warning	OUN	Dewey	48 min
May 5, 9:25 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woodward	50 min
May 5, 9:51 PM CDT	Tornado Warning	OUN	Harmon	39 min
May 5, 10:02 PM CDT	Tornado Warning	OUN	Dewey	28 min
May 5, 10:12 PM CDT	Tornado Warning	OUN	Major	33 min
May 5, 10:21 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa	29 min
May 5, 10:31 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	44 min
May 5, 10:44 PM CDT	Tornado Warning	OUN	Blaine, Major	46 min
May 5, 10:49 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	41 min
May 5, 11:17 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa	43 min
May 5, 11:44 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Washita	46 min
May 6, 12:28 AM CDT	Severe Thunderstorm Warning	OUN	Washita	32 min
May 6, 12:35 AM CDT	Severe Thunderstorm Warning	OUN	Caddo	40 min
May 6, 1:09 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady, Oklahoma	51 min
May 6, 1:34 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie	41 min
May 6, 2:16 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln	29 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.