Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 1028

May 30, 201115 counties in Minnesota; 4 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 30, 2011, 6:51 AM CDT for 15 counties in Minnesota; 4 counties in Wisconsin. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: May 30, 2011, 6:51 AM CDT (11:51 UTC)
Expired: May 30, 2011, 8:45 AM CDT
In force: 114 min
Issued by: the Storm Prediction Center

Counties Anoka County, MN, Benton County, MN, Carlton County, MN, Chisago County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Sherburne County, MN, Stearns County, MN, Wright County, MN, Burnett County, WI, Douglas County, WI, Polk County, WI, Washburn County, WI

The radar

The Minneapolis radar (KMPX), 106 km from the middle of the area, began a volume at 11:52 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, 11.9 hours before the alert went out and 106 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: 2019 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 532 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

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 29, 10:58 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Chippewa, Cottonwood, Jackson, Kandiyohi, Lac qui Parle and 16 more	6 hr
May 30, 2:52 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 30 more	113 min
May 30, 4:05 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Big Stone, Chippewa, Chisago, Douglas, Grant and 19 more	5 hr
May 30, 1:40 PM CDT	Mesoscale Discussion	SPC	Big Stone, Lac qui Parle, Lincoln, Pipestone, Traverse	95 min
May 30, 2:08 PM CDT	Tornado Watch	SPC	Lincoln, Lyon, Pipestone, Rock	7 hr
May 30, 3:52 PM CDT	Tornado Watch	SPC	Becker, Benton, Big Stone, Cass, Chippewa, Clay and 25 more	7 hr
May 30, 6:17 PM CDT	Mesoscale Discussion	SPC	Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 22 more	118 min
May 30, 2:10 PM CDT	Mesoscale Discussion	SPC	Ashland, Barron, Chippewa, Clark, Dunn, Eau Claire and 13 more	95 min

Nearby

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