Alert archive / Arkansas / Mesoscale Discussions in 2025

Mesoscale Discussion 404

April 4, 202529 counties in Arkansas; Dunklin County, Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2025, 11:16 PM CDT for 29 counties in Arkansas; Dunklin County, Missouri. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Apr 4, 2025, 11:16 PM CDT (04:16 UTC)
Expired
Apr 5, 2025, 1:15 AM CDT
In force
119 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 119
All 30 counties

Calhoun County, AR, Clark County, AR, Clay County, AR, Cleveland County, AR, Columbia County, AR, Craighead County, AR, Cross County, AR, Dallas County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lawrence County, AR, Lonoke County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Nevada County, AR, Ouachita County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO

The radar

The Little Rock radar (KLZK), 28 km from the middle of the area, began a volume at 04:20 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

Little Rock, AR (KLZK), launched 00:00Z, 4.3 hours before the alert went out and 205 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 00:00Z on 2025-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1321 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 00:00Z on 2025-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 350 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
1321 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1287 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
350 m²/s²
0-3 km storm-relative helicity
486 m²/s²
Significant tornado parameter
2.3
Supercell composite
28.3

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
Apr 4, 8:04 PM CDTMesoscale DiscussionSPCClark, Cleburne, Cleveland, Columbia, Conway, Craighead and 28 more86 min
Apr 4, 8:50 PM CDTTornado WatchSPCCalhoun, Clark, Clay, Cleburne, Cleveland, Columbia and 29 more9 hr
Apr 5, 2:11 AM CDTMesoscale DiscussionSPCMississippi2 hr
Apr 5, 4:23 AM CDTMesoscale DiscussionSPCBenton, Crawford, Franklin, Logan, Scott, Sebastian and 1 more2 hr
Apr 5, 9:31 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Clark, Cleveland and 28 more119 min
Apr 5, 9:56 AM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 31 more9 hr
Apr 5, 11:36 AM CDTMesoscale DiscussionSPCCrittenden, Cross, Lee, Lonoke, Monroe, Prairie and 3 more114 min
Apr 5, 12:48 PM CDTMesoscale DiscussionSPCHempstead, Howard, Little River, Pike, Polk, Sevier117 min
Apr 5, 3:14 PM CDTMesoscale DiscussionSPCChicot, Desha, Phillips2 hr
Apr 5, 4:50 PM CDTTornado WatchSPCAshley, Chicot7 hr
Apr 4, 9:23 PM CDTMesoscale DiscussionSPCMississippi, New Madrid, Scott67 min
Apr 4, 9:41 PM CDTTornado WatchSPCMississippi, New Madrid, Scott5 hr
Apr 5, 1:03 PM CDTMesoscale DiscussionSPCMississippi, New Madrid, Scott87 min

Nearby

Mesoscale Discussions in Arkansas, 2025Mesoscale Discussions in Missouri, 2025Every mesoscale discussion in 2025

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.