Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 268

April 3, 20147 counties in Arkansas; 11 counties in Oklahoma; 55 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 7:03 PM CDT for 7 counties in Arkansas; 11 counties in Oklahoma; 55 counties in Texas. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2014, 7:03 PM CDT (00:03 UTC)
Expired
Apr 3, 2014, 8:00 PM CDT
In force
57 min
Issued by
the Storm Prediction Center
All 73 counties

Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Hughes County, OK, Johnston County, OK, Marshall County, OK, McCurtain County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Anderson County, TX, Bell County, TX, Bosque County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Gregg County, TX, Hamilton County, TX, Harrison 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, Leon County, TX, Limestone County, TX, Marion County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Morris County, TX, Navarro County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 145 km from the middle of the area, began a volume at 00:07 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

Fort Worth, TX (KFWD), launched 00:00Z, 0.1 hours before the alert went out and 134 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, Fort Worth, TX at 00:00Z on 2014-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 949 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, Fort Worth, TX at 00:00Z on 2014-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 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
949 J/kg
Mixed-layer CIN
-174 J/kg
Mixed-layer LCL
1694 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
252 m²/s²
Significant tornado parameter
0.1
Supercell composite
8.1

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, 7:26 PM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Fulton, Madison, Marion94 min
Apr 3, 8:16 PM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Conway, Craighead, Crittenden and 29 more59 min
Apr 3, 8:30 PM CDTTornado WatchSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more7 hr
Apr 3, 8:44 PM CDTMesoscale DiscussionSPCColumbia, Crawford, Franklin, Hempstead, Howard, Lafayette and 7 more31 min
Apr 3, 8:54 PM CDTTornado WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more7 hr
Apr 3, 10:45 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 32 more60 min
Apr 3, 11:40 PM CDTMesoscale DiscussionSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett95 min
Apr 4, 12:20 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 20 more55 min
Apr 4, 12:40 AM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 16 more5 hr
Apr 4, 12:55 AM CDTMesoscale DiscussionSPCCalhoun, Columbia, Union95 min
Apr 3, 7:18 PM CDTMesoscale DiscussionSPCBandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 11 more57 min
Apr 3, 7:35 PM CDTSevere Thunderstorm WatchSPCBandera, Bastrop, Blanco, Burnet, Caldwell, Comal and 9 more2 hr
Apr 3, 11:52 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bee, Dimmit, Duval, Frio, Goliad and 12 more8 hr
Apr 4, 2:40 AM CDTMesoscale DiscussionSPCAngelina, Austin, Brazoria, Brazos, Burleson, Chambers and 26 more2 hr
Apr 4, 2:58 AM CDTMesoscale DiscussionSPCAtascosa, Bee, Dimmit, Frio, Karnes, La Salle and 3 more92 min
Apr 4, 3:34 AM CDTSevere Thunderstorm WatchSPCAngelina, Austin, Brazoria, Brazos, Burleson, Chambers and 24 more6 hr
Apr 4, 5:49 AM CDTMesoscale DiscussionSPCAngelina, Austin, Chambers, Hardin, Harris, Jasper and 17 more56 min
Apr 4, 6:12 AM CDTMesoscale DiscussionSPCBee, Brooks, Cameron, Duval, Hidalgo, Jim Hogg and 12 more3 hr

Nearby

Mesoscale Discussions in Texas, 2014Mesoscale Discussions in Oklahoma, 2014Mesoscale Discussions in Arkansas, 2014Every mesoscale discussion in 2014

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.