Alert archive / Wisconsin / Mesoscale Discussions in 2007

Mesoscale Discussion 897

May 26, 20076 counties in Iowa; 6 counties in Minnesota; 20 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 26, 2007, 2:40 PM CDT for 6 counties in Iowa; 6 counties in Minnesota; 20 counties in Wisconsin. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: May 26, 2007, 2:40 PM CDT (19:40 UTC)
Expired: May 26, 2007, 4:15 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 32 counties

Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Howard County, IA, Winneshiek County, IA, Carlton County, MN, Fillmore County, MN, Houston County, MN, Pine County, MN, Wabasha County, MN, Winona County, MN, Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Crawford County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Polk County, WI, Rusk County, WI, Sawyer County, WI, Trempealeau County, WI, Vernon County, WI, Washburn County, WI

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 19:43 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, 7.7 hours before the alert went out and 130 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: 1389 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 218 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
May 26, 12:54 PM CDT	Mesoscale Discussion	SPC	Appanoose, Cedar, Clarke, Davis, Decatur, Des Moines and 21 more	2 hr

Nearby

Mesoscale Discussions in Wisconsin, 2007 Mesoscale Discussions in Iowa, 2007 Mesoscale Discussions in Minnesota, 2007 Every mesoscale discussion in 2007

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.