Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 688

May 13, 20044 states

The Storm Prediction Center issued this mesoscale discussion at May 13, 2004, 2:48 PM CDT for 4 states. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
May 13, 2004, 2:48 PM CDT (19:48 UTC)
Expired
May 13, 2004, 4:15 PM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 45 counties

Benton County, AR, Crawford 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, Cotton County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, Lincoln 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, Ottawa County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tulsa County, OK, Wagoner County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Haskell County, TX, Wichita County, TX

The radar

The Norman radar (KTLX), 60 km from the middle of the area, began a volume at 19:48 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 12:00Z, 7.8 hours before the alert went out and 49 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 12:00Z on 2004-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 924 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 12:00Z on 2004-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.193958Sfc1 km3 km6 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
924 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
735 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
May 13, 3:12 AM CDTMesoscale DiscussionSPCBarton, Bates, Cedar, Henry, Jasper, St. Clair and 1 more63 min
May 13, 10:45 AM CDTSevere Thunderstorm WatchSPCMcDonald6 hr
May 13, 12:48 PM CDTMesoscale DiscussionSPCMcDonald, Newton117 min
May 12, 8:04 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Comanche, Cotton, Custer and 7 more86 min
May 12, 9:08 PM CDTMesoscale DiscussionSPCAlfalfa, Dewey, Ellis, Garfield, Grant, Harper and 8 more37 min
May 12, 9:25 PM CDTTornado WatchSPCAlfalfa, Garfield, Grant, Kay, Nowata7 hr
May 12, 11:55 PM CDTMesoscale DiscussionSPCAlfalfa, Garfield, Grant, Kay, Nowata, Osage2 hr
May 13, 10:20 AM CDTMesoscale DiscussionSPCAtoka, Blaine, Caddo, Canadian, Carter, Cleveland and 35 more115 min
May 13, 5:01 PM CDTMesoscale DiscussionSPCGarfield, Grant, Kay, Noble, Osage89 min
May 13, 3:52 AM CDTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bastrop, Brazos, Burleson and 27 more83 min
May 13, 8:30 AM CDTTornado WatchSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 17 more6 hr
May 13, 9:54 AM CDTMesoscale DiscussionSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 17 more96 min
May 13, 12:10 PM CDTTornado WatchSPCAngelina, Austin, Brazoria, Chambers, Colorado, Fayette and 22 more6 hr
May 13, 12:26 PM CDTMesoscale DiscussionSPCBandera, Brown, Callahan, Coke, Coleman, Concho and 26 more2 hr
May 13, 12:55 PM CDTTornado WatchSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more6 hr
May 13, 1:38 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Chambers, Colorado, Fayette, Fort Bend and 15 more97 min
May 13, 2:30 PM CDTTornado WatchSPCAtascosa, Bandera, Bastrop, Bexar, Caldwell, Comal and 21 more6 hr
May 13, 2:57 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more2 hr
May 13, 3:34 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Caldwell, Comal and 21 more86 min
May 13, 5:22 PM CDTMesoscale DiscussionSPCAngelina, Austin, Brazoria, Chambers, Colorado, Fort Bend and 17 more53 min
May 13, 5:54 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more96 min
May 13, 6:55 PM CDTSevere Thunderstorm WatchSPCBandera, Edwards, Gillespie, Kerr, Kimble, Mason and 6 more5 hr

Nearby

Mesoscale Discussions in Oklahoma, 2004Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Arkansas, 2004Every mesoscale discussion 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.