Alert archive / Minnesota / Mesoscale Discussions in 2015

Mesoscale Discussion 1739

August 22, 20159 counties in Iowa; 23 counties in Minnesota; 11 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2015, 8:06 PM CDT for 9 counties in Iowa; 23 counties in Minnesota; 11 counties in Wisconsin. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Aug 22, 2015, 8:06 PM CDT (01:06 UTC)
Expired: Aug 22, 2015, 9:30 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 43 counties

Cerro Gordo County, IA, Floyd County, IA, Franklin County, IA, Hancock County, IA, Howard County, IA, Mitchell County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Aitkin County, MN, Anoka County, MN, Carlton County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Mower County, MN, Olmsted County, MN, Pine County, MN, Ramsey County, MN, Rice County, MN, Saint Louis County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Douglas County, WI, Dunn County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI, Washburn County, WI

The radar

The Minneapolis radar (KMPX), 58 km from the middle of the area, began a volume at 01:09 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.1 hours before the alert went out and 384 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: 1692 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 57 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
Aug 22, 8:49 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Cass, Clarke, Dallas, Decatur and 12 more	116 min

Nearby

Mesoscale Discussions in Minnesota, 2015 Mesoscale Discussions in Wisconsin, 2015 Mesoscale Discussions in Iowa, 2015 Every mesoscale discussion in 2015

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.