Alert archive / Nebraska / Mesoscale Discussions in 2026

Mesoscale Discussion 913

May 30, 2026Decatur County, Kansas; 21 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 30, 2026, 7:01 PM CDT for Decatur County, Kansas; 21 counties in Nebraska. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: May 30, 2026, 7:01 PM CDT (00:01 UTC)
Expired: May 30, 2026, 8:30 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 254

All 22 counties

Decatur County, KS, Arthur County, NE, Blaine County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Sheridan County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 106 km from the middle of the area, began a volume at 00:04 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.0 hours before the alert went out and 14 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: 2499 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.4

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
May 30, 7:29 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Butler, Chase, Clay, Cloud and 30 more	2 hr
May 30, 9:25 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Butler, Chase, Clay, Cloud and 33 more	2 hr
May 30, 8:48 PM CDT	Mesoscale Discussion	SPC	Box Butte, Dawes, Sheridan	87 min
May 30, 9:10 PM CDT	Mesoscale Discussion	SPC	Blaine, Brown, Cherry, Custer, Garfield, Holt and 9 more	95 min
May 31, 3:20 PM CDT	Mesoscale Discussion	SPC	Cedar, Dakota, Dixon, Knox, Pierce	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2026 Mesoscale Discussions in Kansas, 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.