Alert archive / Minnesota / Mesoscale Discussions in 2020

Mesoscale Discussion 1044

June 28, 2020Howard County, Mitchell County, Worth County, Iowa; 15 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2020, 7:20 PM CDT for Howard County, Mitchell County, Worth County, Iowa; 15 counties in Minnesota. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2020, 7:20 PM CDT (00:20 UTC)
Expired: Jun 28, 2020, 9:15 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 315

Counties Howard County, IA, Mitchell County, IA, Worth County, IA, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Le Sueur County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Winona County, MN

The radar

The Minneapolis radar (KMPX), 128 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

Minneapolis, MN (KMPX), launched 00:00Z, 0.3 hours before the alert went out and 129 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: 40 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 130 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
Jun 28, 8:19 PM CDT	Mesoscale Discussion	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 20 more	116 min
Jun 29, 1:22 AM CDT	Mesoscale Discussion	SPC	Brown, Carver, Dakota, Goodhue, Hennepin, Le Sueur and 9 more	2 hr

Nearby

Mesoscale Discussions in Minnesota, 2020 Mesoscale Discussions in Iowa, 2020 Every mesoscale discussion in 2020

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.