Alert archive / Wisconsin / Mesoscale Discussions in 2014

Mesoscale Discussion 765

May 31, 20145 counties in Minnesota; 13 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 31, 2014, 2:53 PM CDT for 5 counties in Minnesota; 13 counties in Wisconsin. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: May 31, 2014, 2:53 PM CDT (19:53 UTC)
Expired: May 31, 2014, 4:30 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Chisago County, MN, Dakota County, MN, Pine County, MN, Ramsey County, MN, Washington County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Dunn County, WI, Iron County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 115 km from the middle of the area, began a volume at 19:55 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, 7.9 hours before the alert went out and 219 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: 532 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1106 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -122 m²/s²
0-3 km storm-relative helicity: -84 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 31, 1:18 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 37 more	117 min

Nearby

Mesoscale Discussions in Wisconsin, 2014 Mesoscale Discussions in Minnesota, 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.