Alert archive / Kansas / Mesoscale Discussions in 2026

Mesoscale Discussion 929

May 31, 202627 counties in Kansas; 26 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 31, 2026, 10:53 PM CDT for 27 counties in Kansas; 26 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 31, 2026, 10:53 PM CDT (03:53 UTC)
Expired
Jun 1, 2026, 1:00 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 258
All 53 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Butler County, KS, Chase County, KS, Coffey County, KS, Cowley County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Harvey County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Woodson County, KS, Wyandotte County, KS, Bates County, MO, Benton County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Clay County, MO, Cooper County, MO, Dallas County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Pettis County, MO, Platte County, MO, Polk County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Pleasant Hill radar (KEAX), 99 km from the middle of the area, began a volume at 03:54 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

Topeka, KS (KTOP), launched 00:00Z, 3.9 hours before the alert went out and 109 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, Topeka, KS at 00:00Z on 2026-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3361 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, Topeka, KS at 00:00Z on 2026-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 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
3361 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
898 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
2.2
Supercell composite
10.3

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
May 31, 7:12 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Butler, Chase and 28 more3 hr
May 31, 8:53 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Butler, Chase, Coffey and 20 more8 hr
Jun 1, 1:54 AM CDTMesoscale DiscussionSPCAllen, Bourbon, Johnson, Linn, Miami2 hr
Jun 1, 3:41 PM CDTMesoscale DiscussionSPCDecatur, Ellis, Finney, Gove, Graham, Grant and 18 more3 hr
Jun 1, 4:37 PM CDTSevere Thunderstorm WatchSPCBarber, Cheyenne, Clark, Comanche, Decatur, Edwards and 34 more7 hr
Jun 1, 5:30 PM CDTMesoscale DiscussionSPCComanche90 min
Jun 1, 3:34 AM CDTSevere Thunderstorm WatchSPCAudrain, Boone, Callaway, Cole, Crawford, Franklin and 17 more4 hr
Jun 1, 4:02 AM CDTMesoscale DiscussionSPCCrawford, Franklin, Gasconade, Jefferson, Montgomery, Osage and 6 more118 min
Jun 1, 6:01 AM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Iron, Madison, Mississippi, Perry and 4 more2 hr
Jun 1, 1:40 PM CDTMesoscale DiscussionSPCChristian, Douglas, Greene, Howell, Ozark, Stone and 2 more50 min
Jun 1, 2:13 PM CDTSevere Thunderstorm WatchSPCBarry, Christian, Douglas, Howell, McDonald, Oregon and 3 more9 hr

Nearby

Mesoscale Discussions in Kansas, 2026Mesoscale Discussions in Missouri, 2026Every 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.