Alert archive / Oklahoma / Tornado Warnings in 2004

Tornado Warning 22, NWS Norman, OK

April 21, 2004Marshall County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 21, 2004, 7:51 PM CDT for Marshall County, Oklahoma. It was in force for 24 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 21, 2004, 7:51 PM CDT (00:51 UTC)
Expired
Apr 21, 2004, 8:15 PM CDT
In force
24 min
Issued by
NWS Norman, OK
Area
Counties, with a storm outline in the text

County Marshall County, OK

The radar

The Norman radar (KTLX), 148 km from the middle of the area, began a volume at 00:54 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.9 hours before the alert went out and 139 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 2004-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 415 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 2004-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.19395878Sfc1 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
415 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1340 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
0.4
Supercell composite
11.0

Open this sounding in Storm Lab

The text

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

406 
WFUS54 KOUN 220051
TOROKC
OKC095-220115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
752 PM CDT WED APR 21 2004

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  MARSHALL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 815 PM CDT

* AT 750 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR LEBANON...
  MOVING EAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE KINGSTON...LEBANON...MADILL AND
  OAKLAND

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 3410 9695 3396 9692 3398 9672 3412 9674

$$
CJS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 7:02 PM CDTSevere Thunderstorm WarningOUNLove28 min
Apr 21, 7:06 PM CDTSevere Thunderstorm WarningOUNOklahoma24 min
Apr 21, 7:14 PM CDTSevere Thunderstorm WarningOUNPontotoc46 min
Apr 21, 7:17 PM CDTSevere Thunderstorm WarningOUNAlfalfa43 min
Apr 21, 7:21 PM CDTSevere Thunderstorm WarningOUNMarshall39 min
Apr 21, 7:22 PM CDTSevere Thunderstorm WarningOUNJohnston38 min
Apr 21, 7:25 PM CDTSevere Thunderstorm WarningOUNPottawatomie50 min
Apr 21, 7:30 PM CDTTornado WarningOUNEllis30 min
Apr 21, 7:33 PM CDTSevere Thunderstorm WarningOUNWoodward42 min
Apr 21, 7:45 PM CDTSevere Thunderstorm WarningOUNWoods45 min
Apr 21, 7:58 PM CDTSevere Thunderstorm WarningOUNHughes, Pontotoc47 min
Apr 21, 7:59 PM CDTSevere Thunderstorm WarningOUNAlfalfa31 min
Apr 21, 8:01 PM CDTSevere Thunderstorm WarningOUNCoal, Johnston44 min
Apr 21, 8:10 PM CDTSevere Thunderstorm WarningOUNGrant65 min
Apr 21, 8:14 PM CDTSevere Thunderstorm WarningOUNWoodward46 min
Apr 21, 8:18 PM CDTSevere Thunderstorm WarningOUNBryan, Marshall, Pottawatomie, Seminole42 min
Apr 21, 8:28 PM CDTSevere Thunderstorm WarningOUNWoods47 min
Apr 21, 8:48 PM CDTSevere Thunderstorm WarningOUNDewey42 min
Apr 21, 8:56 PM CDTSevere Thunderstorm WarningOUNBryan49 min
Apr 21, 8:59 PM CDTSevere Thunderstorm WarningOUNSeminole46 min
Apr 21, 9:01 PM CDTSevere Thunderstorm WarningOUNMajor, Woodward29 min
Apr 21, 9:03 PM CDTSevere Thunderstorm WarningOUNAlfalfa42 min
Apr 21, 9:13 PM CDTSevere Thunderstorm WarningOUNGrant62 min
Apr 21, 9:15 PM CDTSevere Thunderstorm WarningOUNHughes30 min
Apr 21, 9:16 PM CDTSevere Thunderstorm WarningOUNWoods29 min
Apr 21, 9:27 PM CDTSevere Thunderstorm WarningOUNMajor63 min
Apr 21, 9:41 PM CDTSevere Thunderstorm WarningOUNBryan64 min
Apr 21, 9:43 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods47 min
Apr 21, 9:51 PM CDTSevere Thunderstorm WarningOUNBlaine, Dewey39 min
Apr 21, 10:13 PM CDTSevere Thunderstorm WarningOUNGrant47 min
Apr 21, 10:28 PM CDTSevere Thunderstorm WarningOUNBlaine, Garfield, Kingfisher, Major47 min
Apr 21, 11:14 PM CDTSevere Thunderstorm WarningOUNGarfield, Noble46 min
Apr 21, 11:37 PM CDTSevere Thunderstorm WarningOUNLogan, Payne53 min
Apr 21, 11:50 PM CDTSevere Thunderstorm WarningOUNKay, Noble40 min
Apr 22, 12:27 AM CDTSevere Thunderstorm WarningOUNLincoln, Payne48 min
Apr 22, 12:30 AM CDTSevere Thunderstorm WarningOUNKay30 min
Apr 22, 5:23 PM CDTSevere Thunderstorm WarningOUNPottawatomie, Seminole67 min
Apr 22, 5:31 PM CDTSevere Thunderstorm WarningOUNGarvin, McClain59 min
Apr 22, 5:32 PM CDTSevere Thunderstorm WarningOUNCarter, Jefferson, Love, Murray58 min
Apr 22, 6:31 PM CDTSevere Thunderstorm WarningOUNGarvin, Seminole44 min

Nearby

Tornado Warnings in Oklahoma, 2004Every tornado warning in 2004Tornadoes in 2004

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.