Alert archive / Oklahoma / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 137

April 30, 20044 counties in Arkansas; McDonald County, Newton County, Missouri; 30 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Apr 30, 2004, 9:05 PM CDT for 4 counties in Arkansas; McDonald County, Newton County, Missouri; 30 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 30, 2004, 9:05 PM CDT (02:05 UTC)
Expired
May 1, 2004, 2:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 36 counties

Benton County, AR, Crawford County, AR, Sebastian County, AR, Washington County, AR, McDonald County, MO, Newton County, MO, Adair County, OK, Carter County, OK, Cherokee County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, Lincoln County, OK, Love County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 91 km from the middle of the area, began a volume at 02:05 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.

Warnings issued inside it

8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 30, 9:07 PM CDTSevere Thunderstorm WarningTSABenton53 min
Apr 30, 9:09 PM CDTSevere Thunderstorm WarningOUNLove36 min
Apr 30, 9:19 PM CDTSevere Thunderstorm WarningOUNLincoln41 min
Apr 30, 9:32 PM CDTTornado WarningTSABenton43 min
Apr 30, 9:50 PM CDTFlash Flood WarningTSABenton4 hr
Apr 30, 10:11 PM CDTTornado WarningTSABenton, Washington64 min
Apr 30, 11:19 PM CDTSevere Thunderstorm WarningTSAWashington56 min
Apr 30, 11:23 PM CDTSevere Thunderstorm WarningOUNGarvin52 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.1 hours before the alert went out and 119 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 2004-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 2004-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
530 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
410 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 7:06 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Logan, Madison and 3 more114 min
Apr 30, 7:22 PM CDTMesoscale DiscussionSPCHempstead, Howard, Little River, Miller, Sevier83 min
Apr 30, 7:40 PM CDTSevere Thunderstorm WatchSPCHoward, Little River, Pike, Sevier5 hr
Apr 30, 9:54 PM CDTMesoscale DiscussionSPCHoward, Little River, Pike, Sevier96 min
Apr 30, 11:45 PM CDTMesoscale DiscussionSPCBenton, Crawford, Sebastian, Washington90 min
May 1, 12:50 AM CDTSevere Thunderstorm WatchSPCColumbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more6 hr
May 1, 1:11 AM CDTMesoscale DiscussionSPCCrawford, Sebastian, Washington64 min
May 1, 2:38 AM CDTMesoscale DiscussionSPCBradley, Calhoun, Columbia, Hempstead, Lafayette, Miller and 3 more37 min
May 1, 3:10 AM CDTSevere Thunderstorm WatchSPCAshley, Bradley, Calhoun, Cleveland, Columbia, Dallas and 5 more6 hr
May 1, 5:13 AM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Cleveland, Columbia, Dallas and 5 more92 min
May 1, 12:59 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Iron, Madison and 7 more91 min
Apr 30, 8:14 PM CDTMesoscale DiscussionSPCBryan, Carter, Jefferson, Love, Marshall91 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2004Severe Thunderstorm Watches in Arkansas, 2004Severe Thunderstorm Watches in Missouri, 2004Every severe thunderstorm watch 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.