Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 702

May 24, 2020Columbia County, Lafayette County, Miller County, Arkansas; 19 parishes in Louisiana; 66 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 24, 2020, 12:39 PM CDT for Columbia County, Lafayette County, Miller County, Arkansas; 19 parishes in Louisiana; 66 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
May 24, 2020, 12:39 PM CDT (17:39 UTC)
Expired
May 24, 2020, 2:15 PM CDT
In force
96 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch unlikely
Chance of a watch
20%
All 88 counties

Columbia County, AR, Lafayette County, AR, Miller County, AR, Allen Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Calcasieu Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Anderson County, TX, Angelina County, TX, Austin County, TX, Bowie County, TX, Brazos County, TX, Burleson County, TX, Camp County, TX, Cass County, TX, Chambers County, TX, Cherokee County, TX, Colorado County, TX, Delta County, TX, Ellis County, TX, Falls County, TX, Fayette County, TX, Fort Bend County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Jasper County, TX, Jefferson County, TX, Kaufman County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Madison County, TX, Marion County, TX, McLennan County, TX, Milam County, TX, Montgomery County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Polk County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Van Zandt County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 164 km from the middle of the area, began a volume at 17:43 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.7 hours before the alert went out and 219 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, Lake Charles Mun, LA at 12:00Z on 2020-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2187 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, Lake Charles Mun, LA at 12:00Z on 2020-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939Sfc1 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
2187 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
686 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 24, 2:58 PM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more2 hr
May 23, 8:48 PM CDTMesoscale DiscussionSPCArcher, Clay, Montague, Wheeler, Wichita, Wilbarger117 min
May 23, 9:33 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Haskell, Jack, Jones and 8 more4 hr
May 23, 11:36 PM CDTMesoscale DiscussionSPCArcher, Clay, Jack, Montague, Palo Pinto, Parker and 4 more114 min
May 24, 12:21 PM CDTMesoscale DiscussionSPCBorden, Coke, Crane, Crockett, Dawson, Glasscock and 13 more114 min
May 24, 1:58 PM CDTSevere Thunderstorm WatchSPCBorden, Brewster, Coke, Crane, Crockett, Dawson and 19 more6 hr
May 24, 3:07 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 27 more83 min
May 24, 3:26 PM CDTSevere Thunderstorm WatchSPCArmstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 23 more7 hr
May 24, 3:48 PM CDTMesoscale DiscussionSPCBorden, Coke, Crane, Crockett, Dawson, Fisher and 20 more87 min
May 24, 5:28 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Dimmit, Duval, Edwards and 20 more2 hr
May 24, 5:56 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bexar, Brooks, Dimmit, Duval and 17 more6 hr
May 24, 6:39 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 23 more2 hr
May 24, 6:58 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Comanche, Concho, Eastland and 15 more2 hr

Nearby

Mesoscale Discussions in Texas, 2020Mesoscale Discussions in Louisiana, 2020Mesoscale Discussions in Arkansas, 2020Every mesoscale discussion in 2020

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.