Alert archive / Oklahoma / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 135

April 19, 20034 counties in Arkansas; 4 counties in Missouri; 29 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Apr 19, 2003, 8:55 PM CDT for 4 counties in Arkansas; 4 counties in Missouri; 29 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 19, 2003, 8:55 PM CDT (01:55 UTC)
Expired
Apr 20, 2003, 2:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 37 counties

Benton County, AR, Crawford County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Western Arkansas radar (KSRX), 116 km from the middle of the area, began a volume at 01:59 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

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

IssuedProductOfficeCountiesLasted
Apr 19, 8:59 PM CDTSevere Thunderstorm WarningTSASequoyah46 min
Apr 19, 9:02 PM CDTSevere Thunderstorm WarningTSAPittsburg28 min
Apr 19, 9:03 PM CDTSevere Thunderstorm WarningOUNAtoka, Bryan, Johnston, Marshall42 min
Apr 19, 9:18 PM CDTFlash Flood WarningTSAHaskell, Sequoyah3 hr
Apr 19, 9:18 PM CDTSevere Thunderstorm WarningTSALeFlore57 min
Apr 19, 9:26 PM CDTSevere Thunderstorm WarningTSACrawford64 min
Apr 19, 9:38 PM CDTTornado WarningTSASebastian67 min
Apr 19, 9:45 PM CDTSevere Thunderstorm WarningTSASequoyah15 min
Apr 19, 9:46 PM CDTSevere Thunderstorm WarningOUNAtoka29 min
Apr 19, 10:02 PM CDTSevere Thunderstorm WarningTSAPittsburg43 min
Apr 19, 11:35 PM CDTSevere Thunderstorm WarningTSALeFlore40 min
Apr 19, 11:43 PM CDTSevere Thunderstorm WarningTSACrawford, Sebastian47 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, 1.9 hours before the alert went out and 162 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 2003-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 2003-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3665 m above ground
0-6 km bulk shear
87 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 7:54 PM CDTMesoscale DiscussionSPCPolk, Sebastian96 min
Apr 19, 9:40 PM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Franklin, Johnson, Madison and 3 more65 min
Apr 19, 10:35 PM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Carroll, Franklin, Johnson, Madison and 5 more5 hr
Apr 19, 10:42 PM CDTMesoscale DiscussionSPCBenton, Crawford, Sebastian, Washington93 min
Apr 20, 1:25 AM CDTMesoscale DiscussionSPCBaxter, Boone, Clay, Cleburne, Craighead, Fulton and 13 more2 hr
Apr 20, 4:00 AM CDTMesoscale DiscussionSPCClay2 hr
Apr 20, 11:52 AM CDTMesoscale DiscussionSPCArkansas, Bradley, Cleveland, Craighead, Crittenden, Cross and 8 more2 hr
Apr 20, 1:00 PM CDTMesoscale DiscussionSPCCrittenden, Lee, Mississippi3 hr
Apr 20, 3:02 PM CDTMesoscale DiscussionSPCAshley, Chicot, Desha, Drew3 hr
Apr 19, 8:29 PM CDTMesoscale DiscussionSPCBarton, Bates, Benton, Camden, Cass, Cedar and 15 more2 hr
Apr 20, 1:50 AM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Franklin, Iron and 14 more5 hr

Nearby

Severe Thunderstorm Watches in Oklahoma, 2003Severe Thunderstorm Watches in Arkansas, 2003Severe Thunderstorm Watches in Missouri, 2003Every severe thunderstorm watch 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.