Alert archive / Missouri / Mesoscale Discussions in 2026

Mesoscale Discussion 1813

July 31, 202630 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2026, 5:30 PM CDT for 30 counties in Missouri. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jul 31, 2026, 5:30 PM CDT (22:30 UTC)
Expired: Jul 31, 2026, 7:00 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 536

All 30 counties

Audrain County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Laclede County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Phelps County, MO, Pike County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO, Texas County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 100 km from the middle of the area, began a volume at 22:33 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

Springfield, MO (KSGF), launched 12:00Z, 10.5 hours before the alert went out and 254 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: 714 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.2

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.

Issued	Product	Office	Counties	Lasted
Jul 31, 2:13 PM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Benton, Boone, Callaway, Camden and 51 more	2 hr
Jul 31, 3:26 PM CDT	Tornado Watch	SPC	Audrain, Boone, Callaway, Camden, Cole, Cooper and 31 more	8 hr

Nearby

Mesoscale Discussions in Missouri, 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.