Alert archive / Missouri / Mesoscale Discussions in 2026

Mesoscale Discussion 604

April 28, 20264 states

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2026, 5:26 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Apr 28, 2026, 5:26 PM CDT (22:26 UTC)
Expired: Apr 28, 2026, 7:00 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 174

Counties Clay County, AR, Fulton County, KY, Butler County, MO, Dunklin County, MO, New Madrid County, MO, Pemiscot County, MO, Lake County, TN

The radar

The Memphis radar (KNQA), 120 km from the middle of the area, began a volume at 22:30 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

Nashville Metro, TN (KBNA), launched 12:00Z, 10.4 hours before the alert went out and 295 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 82 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 1019 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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.

Issued	Product	Office	Counties	Lasted
Apr 27, 7:23 PM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 17 more	2 hr
Apr 27, 8:10 PM CDT	Mesoscale Discussion	SPC	Clay, Fulton, Randolph	2 hr
Apr 27, 8:23 PM CDT	Tornado Watch	SPC	Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 28 more	6 hr
Apr 27, 9:48 PM CDT	Tornado Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lee and 4 more	7 hr
Apr 27, 10:09 PM CDT	Mesoscale Discussion	SPC	Clay, Cleburne, Craighead, Greene, Independence, Jackson and 8 more	2 hr
Apr 27, 10:46 PM CDT	Mesoscale Discussion	SPC	Cleburne, Independence, Jackson, Stone	59 min
Apr 28, 1:00 AM CDT	Mesoscale Discussion	SPC	Crittenden, Cross, Jackson, Mississippi, Poinsett, Woodruff	2 hr
Apr 28, 9:33 AM CDT	Mesoscale Discussion	SPC	Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 20 more	117 min
Apr 28, 10:01 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Fulton and 7 more	119 min
Apr 28, 10:15 AM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Fulton and 13 more	9 hr
Apr 28, 10:45 AM CDT	Tornado Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 40 more	8 hr
Apr 28, 1:08 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Fulton and 11 more	2 hr
Apr 28, 1:40 PM CDT	Mesoscale Discussion	SPC	Ashley, Chicot	65 min
Apr 28, 1:54 PM CDT	Tornado Watch	SPC	Ashley, Chicot	8 hr
Apr 28, 2:18 PM CDT	Mesoscale Discussion	SPC	Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more	57 min
Apr 28, 2:32 PM CDT	Tornado Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lee and 4 more	7 hr
Apr 28, 3:18 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 37 more	117 min
Apr 28, 4:18 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clay, Fulton and 8 more	87 min
Apr 28, 5:45 PM CDT	Tornado Watch	SPC	Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 50 more	7 hr
Apr 28, 5:52 PM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Clark, Conway, Franklin, Garland and 20 more	113 min
Apr 27, 7:09 PM CDT	Mesoscale Discussion	SPC	Anderson, Boyle, Breckinridge, Bullitt, Carroll, Franklin and 16 more	96 min
Apr 27, 7:39 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Allen, Anderson, Barren, Boone, Bourbon and 53 more	8 hr
Apr 27, 10:31 PM CDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Butler, Cumberland, Edmonson and 11 more	119 min
Apr 28, 1:32 PM CDT	Severe Thunderstorm Watch	SPC	Ballard, Carlisle, Fulton, Graves, Hickman, McCracken	6 hr
Apr 28, 4:51 PM CDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Bell, Boyle, Butler and 32 more	114 min
Apr 28, 5:23 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Allen, Barren, Butler, Caldwell, Calloway and 25 more	3 hr
Apr 27, 8:08 PM CDT	Mesoscale Discussion	SPC	Iron, Jefferson, Madison, Perry, Sainte Genevieve, Saint Francois and 2 more	97 min

Nearby

Mesoscale Discussions in Missouri, 2026 Mesoscale Discussions in Arkansas, 2026 Mesoscale Discussions in Kentucky, 2026 Every mesoscale discussion in 2026

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.