Alert archive / Indiana / Mesoscale Discussions in 2026

Mesoscale Discussion 340

April 2, 202635 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2026, 8:21 PM EDT for 35 counties in Indiana. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Apr 2, 2026, 8:21 PM EDT (00:21 UTC)
Expired: Apr 2, 2026, 9:45 PM EDT
In force: 84 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 91

All 35 counties

Allen County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Howard County, IN, Huntington County, IN, Johnson County, IN, Kosciusko County, IN, LaGrange County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Noble County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN

The radar

The Indianapolis radar (KIND), 79 km from the middle of the area, began a volume at 00:21 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

Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 204 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: 548 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 803 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 412 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 9.7

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 3, 4:15 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Brown, Dearborn, Decatur, Fayette, Franklin and 16 more	2 hr
Apr 3, 5:59 PM EDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Cass, Clinton, Fountain and 13 more	2 hr
Apr 3, 6:18 PM EDT	Tornado Watch	SPC	Benton, Carroll, Cass, Fountain, Jasper, Newton and 4 more	4 hr

Nearby

Mesoscale Discussions in Indiana, 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.