Alert archive / Minnesota / Mesoscale Discussions in 2012

Mesoscale Discussion 1203

June 17, 201214 counties in Minnesota; 4 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2012, 10:55 PM CDT for 14 counties in Minnesota; 4 counties in Wisconsin. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jun 17, 2012, 10:55 PM CDT (03:55 UTC)
Expired: Jun 18, 2012, 12:30 AM CDT
In force: 95 min
Issued by: the Storm Prediction Center

Counties Carver County, MN, Dakota County, MN, Dodge County, MN, Goodhue County, MN, Le Sueur County, MN, McLeod County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI, La Crosse County, WI, Pierce County, WI, Trempealeau County, WI

The radar

The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 03:57 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, 3.9 hours before the alert went out and 70 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: 1837 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 492 m²/s²
0-3 km storm-relative helicity: 747 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 17, 7:20 PM CDT	Mesoscale Discussion	SPC	Kittson, Marshall	85 min
Jun 17, 7:27 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 18 more	93 min
Jun 17, 7:57 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Benton, Blue Earth, Brown, Carlton and 31 more	8 hr
Jun 18, 1:28 AM CDT	Mesoscale Discussion	SPC	Dakota, Dodge, Fillmore, Goodhue, Hennepin, Houston and 7 more	62 min
Jun 18, 11:40 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Buffalo, Calumet, Clark, Door and 27 more	2 hr
Jun 18, 12:24 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Buffalo, Calumet, Clark, Door and 29 more	8 hr
Jun 18, 2:49 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Kewaunee, Marinette, Menominee, Oconto and 5 more	86 min
Jun 18, 3:50 PM CDT	Mesoscale Discussion	SPC	Door, Kewaunee	85 min
Jun 18, 6:00 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Door, Green Lake, Kewaunee, Manitowoc and 7 more	60 min

Nearby

Mesoscale Discussions in Minnesota, 2012 Mesoscale Discussions in Wisconsin, 2012 Every mesoscale discussion in 2012

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.