Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 1624

July 15, 2011Howard County, Mitchell County, Worth County, Iowa; 36 counties in Minnesota; 7 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2011, 11:20 AM CDT for Howard County, Mitchell County, Worth County, Iowa; 36 counties in Minnesota; 7 counties in Wisconsin. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jul 15, 2011, 11:20 AM CDT (16:20 UTC)
Expired: Jul 15, 2011, 12:45 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center

All 46 counties

Howard County, IA, Mitchell County, IA, Worth County, IA, Anoka County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Isanti County, MN, Kandiyohi County, MN, Le Sueur County, MN, McLeod County, MN, Meeker County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Pope County, MN, Ramsey County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Swift County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Wright County, MN, Buffalo County, WI, Dunn County, WI, La Crosse County, WI, Pepin County, WI, Pierce County, WI, Saint Croix County, WI, Trempealeau County, WI

The radar

The Minneapolis radar (KMPX), 30 km from the middle of the area, began a volume at 16:21 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 12:00Z, 4.3 hours before the alert went out and 28 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: 1183 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

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
Jul 15, 2:21 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 38 more	114 min
Jul 15, 2:56 AM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 8 more	7 hr
Jul 15, 6:30 AM CDT	Mesoscale Discussion	SPC	Benton, Carver, Clay, Douglas, Grant, Hennepin and 14 more	2 hr
Jul 15, 6:40 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Carver, Chisago, Douglas, Hennepin and 14 more	6 hr
Jul 15, 6:10 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 8 more	65 min

Nearby

Mesoscale Discussions in Minnesota, 2011 Mesoscale Discussions in Wisconsin, 2011 Mesoscale Discussions in Iowa, 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.