Alert archive / Minnesota / Mesoscale Discussions in 2017

Mesoscale Discussion 996

June 12, 201713 counties in Iowa; 19 counties in Minnesota; 7 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2017, 2:22 PM CDT for 13 counties in Iowa; 19 counties in Minnesota; 7 counties in Wisconsin. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2017, 2:22 PM CDT (19:22 UTC)
Expired: Jun 12, 2017, 4:15 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 39 counties

Allamakee County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Emmet County, IA, Floyd County, IA, Hancock County, IA, Howard County, IA, Kossuth County, IA, Mitchell County, IA, Palo Alto County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Blue Earth County, MN, Brown County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Winona County, MN, Buffalo County, WI, Crawford County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 104 km from the middle of the area, began a volume at 19:24 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 12:00Z, 7.4 hours before the alert went out and 141 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: 1135 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -73 m²/s²
0-3 km storm-relative helicity: 43 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 12, 11:28 AM CDT	Mesoscale Discussion	SPC	Allamakee, Cerro Gordo, Chickasaw, Clay, Dickinson, Emmet and 14 more	92 min
Jun 12, 11:47 AM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Cerro Gordo, Chickasaw, Clayton, Emmet, Fayette and 9 more	7 hr
Jun 11, 8:01 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Door, Florence, Forest, Langlade, Lincoln and 7 more	6 hr
Jun 11, 9:39 PM CDT	Mesoscale Discussion	SPC	Chippewa, Clark, Door, Eau Claire, Florence, Forest and 11 more	2 hr
Jun 11, 11:59 PM CDT	Mesoscale Discussion	SPC	Door, Florence, Forest, Langlade, Marathon, Marinette and 3 more	91 min
Jun 12, 4:37 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Columbia, Dane, Dodge, Door and 29 more	5 hr
Jun 12, 6:38 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 24 more	2 hr

Nearby

Mesoscale Discussions in Minnesota, 2017 Mesoscale Discussions in Iowa, 2017 Mesoscale Discussions in Wisconsin, 2017 Every mesoscale discussion in 2017

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.