Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 1107

June 6, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2011, 1:08 AM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 6, 2011, 1:08 AM CDT (06:08 UTC)
Expired: Jun 6, 2011, 3:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 48 counties

Allamakee County, IA, Bremer County, IA, Buchanan County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Mitchell County, IA, Winneshiek County, IA, Worth County, IA, Jo Daviess County, IL, Blue Earth County, MN, Brown County, MN, Carver County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Le Sueur County, MN, McLeod County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Watonwan County, MN, Winona County, MN, Buffalo County, WI, Crawford County, WI, Grant County, WI, Iowa County, WI, La Crosse County, WI, Lafayette County, WI, Richland County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 87 km from the middle of the area, began a volume at 06:08 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, 6.1 hours before the alert went out and 230 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: 2478 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 6, 6:15 AM CDT	Mesoscale Discussion	SPC	Boone, Cook, DeKalb, DuPage, Kane, Kendall and 4 more	90 min
Jun 6, 7:00 AM CDT	Severe Thunderstorm Watch	SPC	Boone, Lake, McHenry	5 hr
Jun 6, 2:09 AM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Chickasaw, Clayton, Fayette, Howard, Mitchell and 1 more	8 hr
Jun 6, 3:51 PM CDT	Mesoscale Discussion	SPC	Clay, Wilkin	54 min
Jun 6, 10:12 AM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Dodge, Fond du Lac, Green Lake, Marathon and 11 more	93 min
Jun 6, 2:02 PM CDT	Mesoscale Discussion	SPC	Door, Florence, Forest, Marinette, Oneida, Vilas	118 min

Nearby

Mesoscale Discussions in Minnesota, 2011 Mesoscale Discussions in Iowa, 2011 Mesoscale Discussions in Wisconsin, 2011 Every mesoscale discussion in 2011

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.