Alert archive / Wisconsin / Mesoscale Discussions in 2014

Mesoscale Discussion 1306

July 7, 20144 counties in Iowa; 8 counties in Minnesota; 14 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2014, 8:06 PM CDT for 4 counties in Iowa; 8 counties in Minnesota; 14 counties in Wisconsin. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Jul 7, 2014, 8:06 PM CDT (01:06 UTC)
Expired: Jul 7, 2014, 9:00 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

All 26 counties

Allamakee County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Crawford County, WI, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Richland County, WI, Sauk County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 20 km from the middle of the area, began a volume at 01:07 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, 1.1 hours before the alert went out and 214 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: 2 J/kg
Mixed-layer CIN: -362 J/kg
Mixed-layer LCL: 1253 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -121 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

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 7, 7:52 PM CDT	Mesoscale Discussion	SPC	Decatur, Fremont, Mills, Montgomery, Page, Ringgold and 1 more	83 min
Jul 7, 10:36 PM CDT	Mesoscale Discussion	SPC	Allamakee	54 min

Nearby

Mesoscale Discussions in Wisconsin, 2014 Mesoscale Discussions in Minnesota, 2014 Mesoscale Discussions in Iowa, 2014 Every mesoscale discussion in 2014

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.