Alert archive / Minnesota / Mesoscale Discussions in 2023

Mesoscale Discussion 907

May 31, 202313 counties in Minnesota; Richland County, North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 31, 2023, 2:11 PM CDT for 13 counties in Minnesota; Richland County, North Dakota; 4 counties in South Dakota. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 31, 2023, 2:11 PM CDT (19:11 UTC)
Expired: May 31, 2023, 3:45 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 5%

Counties Big Stone County, MN, Chippewa County, MN, Grant County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Pipestone County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Yellow Medicine County, MN, Richland County, ND, Deuel County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 149 km from the middle of the area, began a volume at 19:11 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 12:00Z, 7.2 hours before the alert went out and 149 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2044 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 31, 3:39 PM CDT	Mesoscale Discussion	SPC	Custer, Fall River, Oglala Lakota, Pennington	3 hr

Nearby

Mesoscale Discussions in Minnesota, 2023 Mesoscale Discussions in South Dakota, 2023 Mesoscale Discussions in North Dakota, 2023 Every mesoscale discussion in 2023

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.