Alert archive / Oklahoma / Tornado Warnings in 2003

Tornado Warning 34, NWS Norman, OK

April 23, 2003Jefferson County, Stephens County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 23, 2003, 8:27 PM CDT for Jefferson County, Stephens 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 23, 2003, 8:27 PM CDT (01:27 UTC)
Expired
Apr 23, 2003, 9:00 PM CDT
In force
33 min
Issued by
NWS Norman, OK
Area
Counties, with a storm outline in the text

Counties Jefferson County, OK, Stephens County, OK

The radar

The Altus AFB radar (KFDR), 104 km from the middle of the area, began a volume at 01:29 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 23, 4:00 PM CDTTornado WatchSPC6 hr
Apr 23, 6:00 PM CDTTornado WatchSPC4 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.5 hours before the alert went out and 112 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2003-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2003-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 385 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
32 J/kg
Mixed-layer CIN
-184 J/kg
Mixed-layer LCL
505 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
385 m²/s²
0-3 km storm-relative helicity
487 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOUN 240127
TOROKC
OKC067-137-240200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
827 PM CDT WED APR 23 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN JEFFERSON COUNTY IN SOUTHERN OKLAHOMA
  SOUTHERN STEPHENS COUNTY IN SOUTHERN OKLAHOMA

* UNTIL 900 PM CDT

* AT 827 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO OVER ADDINGTON...MOVING NORTHEAST AT
  35 MPH.

* LOCATIONS IN THE WARNING INCLUDE ADDINGTON AND LOCO

A TORNADO MAY FORM AT ANYTIME. TAKE COVER NOW. ABANDON 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.

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 3430 9804 3413 9793 3422 9757 3445 9764

$$

WR

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 7:06 PM CDTSevere Thunderstorm WarningOUNStephens24 min
Apr 23, 7:25 PM CDTSevere Thunderstorm WarningOUNGarvin50 min
Apr 23, 7:57 PM CDTSevere Thunderstorm WarningOUNCotton, Jefferson48 min
Apr 23, 8:00 PM CDTSevere Thunderstorm WarningOUNMcClain30 min
Apr 23, 8:12 PM CDTSevere Thunderstorm WarningOUNPottawatomie48 min
Apr 23, 8:16 PM CDTSevere Thunderstorm WarningOUNStephens44 min
Apr 23, 8:46 PM CDTSevere Thunderstorm WarningOUNCarter, Garvin, McClain, Murray, Pontotoc, Seminole44 min
Apr 23, 8:53 PM CDTTornado WarningOUNCarter27 min
Apr 23, 8:56 PM CDTSevere Thunderstorm WarningOUNPottawatomie34 min
Apr 23, 8:59 PM CDTSevere Thunderstorm WarningOUNStephens46 min
Apr 23, 9:08 PM CDTTornado WarningOUNMurray37 min
Apr 23, 9:28 PM CDTTornado WarningOUNGarvin, Pontotoc32 min
Apr 23, 9:31 PM CDTSevere Thunderstorm WarningOUNPottawatomie, Seminole44 min
Apr 23, 9:33 PM CDTSevere Thunderstorm WarningOUNMcClain42 min
Apr 23, 9:56 PM CDTSevere Thunderstorm WarningOUNCoal34 min
Apr 23, 9:59 PM CDTSevere Thunderstorm WarningOUNHughes46 min
Apr 23, 10:03 PM CDTSevere Thunderstorm WarningOUNPontotoc32 min
Apr 23, 10:32 PM CDTSevere Thunderstorm WarningOUNCoal28 min
Apr 24, 12:48 AM CDTSevere Thunderstorm WarningOUNDewey27 min
Apr 24, 1:12 AM CDTSevere Thunderstorm WarningOUNBlaine, Dewey, Major63 min
Apr 24, 1:13 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods47 min
Apr 24, 2:32 AM CDTSevere Thunderstorm WarningOUNGrant43 min

Nearby

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