Alert archive / Minnesota / Mesoscale Discussions in 2022

Mesoscale Discussion 718

May 11, 20229 counties in Minnesota; Pierce County, Saint Croix County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 11, 2022, 6:32 AM CDT for 9 counties in Minnesota; Pierce County, Saint Croix County, Wisconsin. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: May 11, 2022, 6:32 AM CDT (11:32 UTC)
Expired: May 11, 2022, 8:00 AM CDT
In force: 88 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

Counties Dakota County, MN, Goodhue County, MN, Hennepin County, MN, Le Sueur County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Washington County, MN, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 56 km from the middle of the area, began a volume at 11:35 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, 11.5 hours before the alert went out and 58 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2932 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 129 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 11, 7:44 AM CDT	Mesoscale Discussion	SPC	Murray, Nobles, Pipestone, Rock	91 min
May 11, 12:50 PM CDT	Mesoscale Discussion	SPC	Brown, Cottonwood, Jackson, Lincoln, Lyon, Martin and 6 more	2 hr
May 11, 1:15 PM CDT	Tornado Watch	SPC	Blue Earth, Brown, Cottonwood, Faribault, Jackson, Lincoln and 9 more	8 hr
May 11, 3:52 PM CDT	Mesoscale Discussion	SPC	Brown, Chippewa, Cottonwood, Jackson, Lac qui Parle, Lincoln and 10 more	113 min
May 11, 5:27 PM CDT	Tornado Watch	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 34 more	7 hr
May 11, 5:50 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Carver, Chippewa, Cottonwood, Dakota and 30 more	85 min

Nearby

Mesoscale Discussions in Minnesota, 2022 Mesoscale Discussions in Wisconsin, 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.