Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 496

April 19, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2003, 3:18 AM CDT for 4 states. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Apr 19, 2003, 3:18 AM CDT (08:18 UTC)
Expired
Apr 19, 2003, 5:15 AM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 55 counties

Benton County, AR, Crawford County, AR, Sebastian County, AR, Washington County, AR, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barry County, MO, Barton County, MO, Dade County, MO, Jasper 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, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Marshall County, OK, Mayes County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 50 km from the middle of the area, began a volume at 08:17 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, 8.3 hours before the alert went out and 167 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 2003-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1488 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 2003-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.1939587897117136Sfc1 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
1488 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
1049 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 9:01 AM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Howard, Johnson and 12 more3 hr
Apr 19, 6:07 PM CDTMesoscale DiscussionSPCBenton, Crawford, Sebastian, Washington83 min
Apr 18, 7:33 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jefferson57 min
Apr 18, 11:08 PM CDTMesoscale DiscussionSPCButler, Chase, Coffey, Douglas, Franklin, Harvey and 12 more2 hr
Apr 19, 12:58 AM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman, Sumner2 hr
Apr 19, 1:25 AM CDTSevere Thunderstorm WatchSPCBarber, Butler, Chautauqua, Comanche, Cowley, Edwards and 11 more7 hr
Apr 19, 4:52 AM CDTMesoscale DiscussionSPCBarber, Butler, Comanche, Cowley, Greenwood, Harper and 7 more113 min
Apr 19, 1:10 PM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman, Pratt, Sedgwick and 1 more2 hr
Apr 19, 1:15 PM CDTTornado WatchSPCBarber, Clark, Comanche, Cowley, Harper, Kingman and 2 more7 hr
Apr 19, 2:30 PM CDTTornado WatchSPCButler, Chautauqua, Cherokee, Cowley, Crawford, Elk and 4 more7 hr
Apr 19, 4:58 PM CDTMesoscale DiscussionSPCAnderson, Chase, Coffey, Douglas, Franklin, Greenwood and 9 more92 min
Apr 19, 5:25 PM CDTSevere Thunderstorm WatchSPCAnderson, Coffey, Douglas, Franklin, Greenwood, Johnson and 7 more6 hr
Apr 19, 5:50 PM CDTMesoscale DiscussionSPCHarper, Kingman, Sumner85 min
Apr 19, 6:55 PM CDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford5 hr
Apr 18, 8:31 PM CDTMesoscale DiscussionSPCCaddo, Cleveland, Comanche, Cotton, Grady, Greer and 8 more2 hr
Apr 18, 9:50 PM CDTSevere Thunderstorm WatchSPCBeckham, Caddo, Canadian, Cleveland, Comanche, Cotton and 13 more6 hr
Apr 18, 11:32 PM CDTMesoscale DiscussionSPCBeckham, Caddo, Canadian, Cleveland, Comanche, Cotton and 10 more118 min
Apr 19, 1:20 AM CDTTornado WatchSPCComanche, Cotton, Greer, Harmon, Jackson, Kiowa and 2 more7 hr
Apr 19, 4:11 AM CDTMesoscale DiscussionSPCComanche, Cotton, Jackson, Kiowa, Stephens, Tillman2 hr
Apr 19, 2:02 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Cleveland, Coal, Creek and 25 more88 min
Apr 19, 3:15 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Cleveland, Coal, Creek and 25 more2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Kansas, 2003Mesoscale Discussions in Missouri, 2003Every mesoscale discussion 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.