Alert archive / Texas / Tornado Warnings in 2003

Tornado Warning 24, NWS Norman, OK

April 15, 2003Knox County, Texas

NWS Norman, OK issued this tornado warning at Apr 15, 2003, 8:41 PM CDT for Knox County, Texas. It was in force for 34 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, 8:41 PM CDT (01:41 UTC)
Expired: Apr 15, 2003, 9:15 PM CDT
In force: 34 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Knox County, TX

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

Fort Worth, TX (KFWD), launched 00:00Z, 1.7 hours before the alert went out and 239 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: 133 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1178 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOUN 160141
TOROKC
TXC275-160215-

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

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  KNOX COUNTY IN NORTHERN TEXAS

* UNTIL 915 PM CDT

* AT 841 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO 3 MILES WEST OF KNOX CITY...MOVING
  EAST AT 55 MPH.

* LOCATIONS IN THE WARNING INCLUDE GOREE...KNOX CITY...MUNDAY AND
  RHINELAND

TORNADOES ARE ESPECIALLY DANGEROUS AT NIGHT BECAUSE THEY ARE HARD TO
SEE. TAKE COVER NOW. IF A BASEMENT IS NOT AVAILABLE...MOVE TO AN
INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR. LEAVE MOBILE HOMES AND
VEHICLES FOR REINFORCED SHELTER. STAY AWAY FROM WINDOWS.

LAT...LON 3351 9992 3336 9990 3342 9948 3357 9949

$$
ANDRA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:06 PM CDT	Tornado Warning	OUN	Hardeman	24 min
Apr 15, 7:23 PM CDT	Tornado Warning	OUN	Hardeman	37 min
Apr 15, 7:44 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	46 min
Apr 15, 8:11 PM CDT	Tornado Warning	OUN	Hardeman, Wilbarger	49 min
Apr 15, 8:23 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	52 min
Apr 15, 8:57 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	48 min
Apr 15, 9:01 PM CDT	Tornado Warning	OUN	Baylor	44 min
Apr 15, 9:15 PM CDT	Severe Thunderstorm Warning	OUN	Knox	30 min
Apr 15, 9:16 PM CDT	Severe Thunderstorm Warning	OUN	Wichita	44 min
Apr 15, 9:42 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	48 min
Apr 15, 10:19 PM CDT	Severe Thunderstorm Warning	OUN	Clay	41 min
Apr 15, 10:59 PM CDT	Severe Thunderstorm Warning	OUN	Clay	46 min
Apr 15, 11:11 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita	49 min
Apr 15, 11:44 PM CDT	Severe Thunderstorm Warning	OUN	Clay	46 min

Nearby

Tornado Warnings in Texas, 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.