Alert archive / Minnesota / Mesoscale Discussions in 2012

Mesoscale Discussion 1366

July 2, 201227 counties in Minnesota; 10 counties in North Dakota; Ashland County, Bayfield County, Douglas County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2012, 6:40 PM CDT for 27 counties in Minnesota; 10 counties in North Dakota; Ashland County, Bayfield County, Douglas County, Wisconsin. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Jul 2, 2012, 6:40 PM CDT (23:40 UTC)
Expired: Jul 2, 2012, 7:45 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center

All 40 counties

Aitkin County, MN, Becker County, MN, Beltrami County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Hubbard County, MN, Itasca County, MN, Kittson County, MN, Koochiching County, MN, Lake County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Pine County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Saint Louis County, MN, Todd County, MN, Wadena County, MN, Barnes County, ND, Cass County, ND, Cavalier County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Pembina County, ND, Steele County, ND, Traill County, ND, Walsh County, ND, Ashland County, WI, Bayfield County, WI, Douglas County, WI

The radar

The Duluth radar (KDLH), 188 km from the middle of the area, began a volume at 23:42 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 11.7 hours before the alert went out and 64 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: 3219 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 897 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.5

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 2, 10:59 AM CDT	Mesoscale Discussion	SPC	Beltrami, Cass, Clearwater, Hubbard, Itasca, Kittson and 8 more	91 min
Jul 2, 11:43 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Cass, Clay, Clearwater and 14 more	7 hr
Jul 2, 3:33 PM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 15 more	87 min
Jul 2, 6:54 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 24 more	6 hr
Jul 1, 7:35 PM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Divide, Dunn, Golden Valley and 5 more	115 min
Jul 2, 1:23 AM CDT	Mesoscale Discussion	SPC	Burke, Divide, McKenzie, Mountrail, Renville, Ward and 1 more	97 min

Nearby

Mesoscale Discussions in Minnesota, 2012 Mesoscale Discussions in North Dakota, 2012 Mesoscale Discussions in Wisconsin, 2012 Every mesoscale discussion in 2012

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.