Alert archive / Arkansas / Mesoscale Discussions in 2023

Mesoscale Discussion 404

March 31, 20235 states

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2023, 3:42 PM CDT for 5 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2023, 3:42 PM CDT (20:42 UTC)
Expired
Mar 31, 2023, 5:15 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 94
All 103 counties

Arkansas County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sevier County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Calloway County, KY, Fulton County, KY, Graves County, KY, Trigg County, KY, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN

The radar

The Little Rock radar (KLZK), 42 km from the middle of the area, began a volume at 20:45 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

Little Rock, AR (KLZK), launched 12:00Z, 8.7 hours before the alert went out and 178 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, Little Rock, AR at 12:00Z on 2023-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 30 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, Little Rock, AR at 12:00Z on 2023-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 490 square meters per square second.1939587897117Sfc1 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
30 J/kg
Mixed-layer CIN
-335 J/kg
Mixed-layer LCL
806 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
490 m²/s²
0-3 km storm-relative helicity
655 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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
Mar 31, 10:44 AM CDTMesoscale DiscussionSPCArkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 49 more2 hr
Mar 31, 10:47 AM CDTMesoscale DiscussionSPCArkansas, Crittenden, Cross, Jefferson, Lee, Lincoln and 5 more58 min
Mar 31, 12:28 PM CDTTornado Watch PDSSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 60 more11 hr
Mar 31, 1:42 PM CDTMesoscale DiscussionSPCClark, Conway, Faulkner, Garland, Grant, Hot Spring and 7 more93 min
Mar 31, 2:36 PM CDTMesoscale DiscussionSPCLonoke, Prairie, Pulaski, White, Woodruff24 min
Mar 31, 4:53 PM CDTMesoscale DiscussionSPCColumbia, Hempstead, Lafayette, Little River, Miller, Nevada2 hr
Mar 31, 6:34 PM CDTMesoscale DiscussionSPCArkansas, Crittenden, Cross, Lee, Monroe, Phillips and 3 more56 min
Mar 31, 6:59 PM CDTMesoscale DiscussionSPCArkansas, Crittenden, Cross, Lee, Monroe, Phillips and 3 more61 min
Mar 31, 12:53 PM CDTMesoscale DiscussionSPCBallard, Carlisle, Hickman97 min
Mar 31, 6:20 PM CDTMesoscale DiscussionSPCBreckinridge, Butler, Caldwell, Christian, Crittenden, Daviess and 18 more115 min
Mar 31, 6:59 PM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 55 more7 hr
Mar 31, 5:28 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 21 more92 min
Mar 31, 5:58 PM CDTTornado Watch PDSSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more6 hr
Mar 31, 8:36 AM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Barton, Bates, Benton and 78 more84 min
Mar 31, 10:37 AM CDTMesoscale DiscussionSPCClark53 min
Mar 31, 11:24 AM CDTMesoscale DiscussionSPCAdair, Audrain, Benton, Boone, Caldwell, Callaway and 43 more96 min
Mar 31, 11:46 AM CDTTornado Watch PDSSPCAdair, Audrain, Boone, Caldwell, Callaway, Carroll and 38 more8 hr
Mar 31, 12:51 PM CDTMesoscale DiscussionSPCHarrison, Mercer84 min
Mar 31, 1:32 PM CDTMesoscale DiscussionSPCClark, Lewis118 min
Mar 31, 1:36 PM CDTMesoscale DiscussionSPCAdair, Carroll, Chariton, Cooper, Grundy, Howard and 12 more114 min
Mar 31, 3:17 PM CDTMesoscale DiscussionSPCAdair, Audrain, Boone, Callaway, Chariton, Clark and 30 more88 min
Mar 31, 5:18 PM CDTMesoscale DiscussionSPCClark, Lewis, Lincoln, Marion, Pike, Ralls117 min
Mar 31, 5:30 PM CDTMesoscale DiscussionSPCClark, Lewis, Lincoln, Marion, Pike, Ralls2 hr
Mar 31, 5:14 PM CDTMesoscale DiscussionSPCShelby, Tipton31 min

Nearby

Mesoscale Discussions in Arkansas, 2023Mesoscale Discussions in Tennessee, 2023Mesoscale Discussions in Mississippi, 2023Every mesoscale discussion in 2023

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.