Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 543

April 3, 200815 counties in Arkansas; 4 counties in Oklahoma; 30 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2008, 5:32 PM CDT for 15 counties in Arkansas; 4 counties in Oklahoma; 30 counties in Texas. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2008, 5:32 PM CDT (22:32 UTC)
Expired
Apr 3, 2008, 6:30 PM CDT
In force
58 min
Issued by
the Storm Prediction Center
All 49 counties

Clark County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Polk County, AR, Saline County, AR, Sevier County, AR, Bryan County, OK, Choctaw County, OK, Marshall County, OK, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 142 km from the middle of the area, began a volume at 22:35 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.5 hours before the alert went out and 285 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 2008-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 199 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 12:00Z on 2008-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 666 square meters per square second.1939587897Sfc1 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
199 J/kg
Mixed-layer CIN
-238 J/kg
Mixed-layer LCL
410 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
666 m²/s²
0-3 km storm-relative helicity
625 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.8

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 3, 5:22 AM CDTMesoscale DiscussionSPCArkansas, Cleburne, Cleveland, Conway, Crawford, Cross and 25 more113 min
Apr 3, 2:39 PM CDTMesoscale DiscussionSPCBenton, Crawford, Franklin, Johnson, Logan, Madison and 6 more66 min
Apr 3, 3:50 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 20 more5 hr
Apr 3, 5:54 PM CDTTornado WatchSPCHoward, Little River, Miller, Sevier3 hr
Apr 3, 6:12 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 9 more2 hr
Apr 3, 10:47 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Jefferson and 5 more58 min
Apr 3, 1:42 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Carter, Cleveland, Comanche, Cotton and 17 more93 min
Apr 3, 2:04 PM CDTTornado WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Cleveland and 23 more6 hr
Apr 3, 3:28 PM CDTMesoscale DiscussionSPCCoke, Crockett, Glasscock, Irion, Reagan, Sterling and 3 more62 min
Apr 3, 4:40 PM CDTTornado WatchSPCCrockett, Edwards, Kinney, Schleicher, Sutton, Terrell and 1 more3 hr

Nearby

Mesoscale Discussions in Texas, 2008Mesoscale Discussions in Arkansas, 2008Mesoscale Discussions in Oklahoma, 2008Every mesoscale discussion in 2008

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.