Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 593

April 8, 200825 counties in Arkansas; McCurtain County, Oklahoma; 40 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2008, 10:36 PM CDT for 25 counties in Arkansas; McCurtain County, Oklahoma; 40 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Apr 8, 2008, 10:36 PM CDT (03:36 UTC)
Expired
Apr 9, 2008, 12:00 AM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 66 counties

Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Saline County, AR, Sevier County, AR, Union County, AR, McCurtain County, OK, Bosque County, TX, Bowie County, TX, Brown County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Comanche County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Erath County, TX, Franklin County, TX, Gregg County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Marion County, TX, McLennan County, TX, Mills County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, San Saba County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 131 km from the middle of the area, began a volume at 03:36 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

Shreveport, LA (KSHV), launched 00:00Z, 3.6 hours before the alert went out and 138 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, Shreveport, LA at 00:00Z on 2008-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 453 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, Shreveport, LA at 00:00Z on 2008-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
453 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1512 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.9

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 8, 7:33 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 50 more117 min
Apr 8, 11:51 PM CDTSevere Thunderstorm WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more5 hr
Apr 9, 3:29 AM CDTMesoscale DiscussionSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more61 min
Apr 9, 4:01 PM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller59 min
Apr 9, 5:38 PM CDTTornado WatchSPCCrawford, Franklin, Sebastian5 hr
Apr 9, 9:06 AM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 9 more54 min
Apr 9, 9:35 AM CDTSevere Thunderstorm WatchSPCBeckham, Caddo, Comanche, Cotton, Custer, Grady and 9 more6 hr
Apr 9, 12:24 PM CDTMesoscale DiscussionSPCAtoka, Beckham, Blaine, Bryan, Caddo, Canadian and 29 more66 min
Apr 9, 3:07 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 25 more53 min
Apr 9, 3:33 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Johnston and 5 more27 min
Apr 9, 3:48 PM CDTTornado Watch PDSSPCAtoka, Bryan, Carter, Choctaw, Coal, Johnston and 6 more7 hr
Apr 9, 6:12 PM CDTMesoscale DiscussionSPCJackson63 min
Apr 9, 6:55 PM CDTSevere Thunderstorm WatchSPCCaddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 15 more8 hr
Apr 8, 8:06 PM CDTMesoscale DiscussionSPCBell, Bosque, Burnet, Coryell, Ellis, Falls and 16 more114 min
Apr 8, 8:48 PM CDTTornado WatchSPCBell, Burnet, Coryell, Falls, Gillespie, Kimble and 11 more2 hr
Apr 9, 6:00 AM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Castro, Childress, Cochran and 22 more60 min
Apr 9, 6:27 AM CDTSevere Thunderstorm WatchSPCAndrews, Armstrong, Bailey, Borden, Briscoe, Carson and 36 more8 hr
Apr 9, 12:46 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 41 more59 min
Apr 9, 1:20 PM CDTTornado Watch PDSSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 40 more7 hr
Apr 9, 5:12 PM CDTMesoscale DiscussionSPCArcher, Baylor, Bell, Borden, Bosque, Brown and 51 more63 min
Apr 9, 6:59 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 34 more61 min

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.