Alert archive / Texas / Mesoscale Discussions in 2022

Mesoscale Discussion 663

May 5, 20228 counties in Arkansas; 10 parishes in Louisiana; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 5, 2022, 3:08 PM CDT for 8 counties in Arkansas; 10 parishes in Louisiana; 13 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 5, 2022, 3:08 PM CDT (20:08 UTC)
Expired
May 5, 2022, 5:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Tornado watch 181
All 31 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Cleveland County, AR, Columbia County, AR, Drew County, AR, Ouachita County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Lincoln Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Angelina County, TX, Brazos County, TX, Cherokee County, TX, Grimes County, TX, Houston County, TX, Madison County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, San Augustine County, TX, Shelby County, TX, Trinity County, TX, Walker County, TX

The radar

The Shreveport radar (KSHV), 19 km from the middle of the area, began a volume at 20:10 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

Shreveport, LA (KSHV), launched 12:00Z, 8.1 hours before the alert went out and 25 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 12:00Z on 2022-05-05Temperature 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 12:00Z on 2022-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 268 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
-336 J/kg
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
268 m²/s²
0-3 km storm-relative helicity
341 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 5, 1:42 AM CDTMesoscale DiscussionSPCSevier2 hr
May 5, 10:13 AM CDTTornado WatchSPCColumbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more8 hr
May 5, 12:02 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Cleveland, Crittenden, Desha and 7 more2 hr
May 5, 12:44 PM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 13 more8 hr
May 5, 12:57 PM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller, Union63 min
May 5, 2:35 PM CDTMesoscale DiscussionSPCArkansas, Phillips55 min
May 5, 4:56 PM CDTMesoscale DiscussionSPCDesha, Drew, Phillips94 min
May 5, 5:53 PM CDTMesoscale DiscussionSPCJackson, Natchitoches, Sabine, Winn97 min
May 5, 6:15 PM CDTMesoscale DiscussionSPCMadison, Tensas90 min
May 4, 7:16 PM CDTMesoscale DiscussionSPCCoke, Crockett, Edwards, Fisher, Glasscock, Haskell and 18 more119 min
May 4, 7:36 PM CDTMesoscale DiscussionSPCBaylor, Childress, Collingsworth, Cottle, Foard, Hall and 4 more84 min
May 4, 9:07 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bexar, Blanco, Comal, Frio and 7 more5 hr
May 4, 9:13 PM CDTMesoscale DiscussionSPCClay, Foard, Hardeman, Montague, Wichita, Wilbarger92 min
May 4, 9:17 PM CDTMesoscale DiscussionSPCCallahan, Coke, Crockett, Haskell, Irion, Jones and 8 more28 min
May 4, 9:41 PM CDTTornado WatchSPCArcher, Baylor, Clay, Foard, Hardeman, Haskell and 7 more6 hr
May 4, 10:45 PM CDTMesoscale DiscussionSPCBexar, Medina90 min
May 4, 11:33 PM CDTMesoscale DiscussionSPCClay, Hardeman, Montague, Wichita, Wilbarger117 min
May 5, 9:45 AM CDTMesoscale DiscussionSPCAnderson, Bell, Brazos, Burleson, Camp, Cass and 21 more2 hr
May 5, 1:18 PM CDTMesoscale DiscussionSPCFannin, Lamar, Red River87 min

Nearby

Mesoscale Discussions in Texas, 2022Mesoscale Discussions in Louisiana, 2022Mesoscale Discussions in Arkansas, 2022Every mesoscale discussion in 2022

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.