Alert archive / Oklahoma / Tornado Warnings in 2003

Tornado Warning 18, NWS Norman, OK

April 15, 2003Jackson County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 15, 2003, 7:57 PM CDT for Jackson County, Oklahoma. It was in force for 33 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: Apr 15, 2003, 7:57 PM CDT (00:57 UTC)
Expired: Apr 15, 2003, 8:30 PM CDT
In force: 33 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Jackson County, OK

The radar

The Altus AFB radar (KFDR), 58 km from the middle of the area, began a volume at 00:57 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
Apr 15, 5:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.0 hours before the alert went out and 196 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: 15 J/kg
Mixed-layer CIN: -337 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 380 m²/s²
0-3 km storm-relative helicity: 627 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.

158 
WFUS54 KOUN 160057
TOROKC
OKC065-160130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
757 PM CDT TUE APR 15 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  JACKSON COUNTY IN SOUTHWEST OKLAHOMA

* UNTIL 830 PM CDT

* AT 757 PM CDT...A THUNDERSTORM WITH A HISTORY OF PRODUCING
  TORNADOES WAS NEAR DUKE...MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IN THE WARNING INCLUDE BLAIR...DUKE...MARTHA AND WARREN

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 3468 9964 3459 9957 3472 9918 3483 9926

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:13 PM CDT	Tornado Warning	OUN	Beckham	47 min
Apr 15, 7:23 PM CDT	Tornado Warning	OUN	Harmon, Jackson	37 min
Apr 15, 7:30 PM CDT	Tornado Warning	OUN	Roger Mills	30 min
Apr 15, 7:44 PM CDT	Severe Thunderstorm Warning	OUN	Custer	46 min
Apr 15, 7:57 PM CDT	Severe Thunderstorm Warning	OUN	Washita	48 min
Apr 15, 8:07 PM CDT	Tornado Warning	OUN	Custer, Washita	23 min
Apr 15, 8:08 PM CDT	Tornado Warning	OUN	Custer, Washita	22 min
Apr 15, 8:14 PM CDT	Tornado Warning	OUN	Kiowa	31 min
Apr 15, 8:32 PM CDT	Severe Thunderstorm Warning	OUN	Custer	43 min
Apr 15, 8:35 PM CDT	Tornado Warning	OUN	Jackson, Tillman	40 min
Apr 15, 8:44 PM CDT	Tornado Warning	OUN	Kiowa	31 min
Apr 15, 9:11 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	49 min
Apr 15, 11:20 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma	40 min
Apr 15, 11:27 PM CDT	Severe Thunderstorm Warning	OUN	Payne	48 min
Apr 15, 11:44 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	46 min
Apr 15, 11:57 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie	48 min
Apr 16, 12:15 AM CDT	Severe Thunderstorm Warning	OUN	Carter	30 min

Nearby

Tornado Warnings in Oklahoma, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.