Alert archive / South Dakota / Mesoscale Discussions in 2022

Mesoscale Discussion 1306

June 29, 20225 counties in Nebraska; 22 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2022, 6:54 PM MDT for 5 counties in Nebraska; 22 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 29, 2022, 6:54 PM MDT (00:54 UTC)
Expired: Jun 29, 2022, 9:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 414

All 27 counties

Cherry County, NE, Dawes County, NE, Keya Paha County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Dewey County, SD, Fall River County, SD, Haakon County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 77 km from the middle of the area, began a volume at 00:56 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

Aberdeen, SD (KABR), launched 00:00Z, 0.9 hours before the alert went out and 335 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: 1162 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 2778 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 75 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
Jun 30, 5:29 PM MDT	Mesoscale Discussion	SPC	Gage, Jefferson, Nuckolls, Saline, Thayer	2 hr
Jun 29, 7:38 PM MDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brookings, Brown, Brule, Buffalo and 24 more	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2022 Mesoscale Discussions in Nebraska, 2022 Every mesoscale discussion in 2022

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.