Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1264

June 23, 20075 counties in Minnesota; 8 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2007, 8:46 PM CDT for 5 counties in Minnesota; 8 counties in North Dakota. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jun 23, 2007, 8:46 PM CDT (01:46 UTC)
Expired: Jun 23, 2007, 10:15 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center

Counties Kittson County, MN, Marshall County, MN, Pennington County, MN, Polk County, MN, Roseau County, MN, Cavalier County, ND, Grand Forks County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Rolette County, ND, Towner County, ND, Walsh County, ND

The watches that followed

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

Tornado Watch 446Jun 23, 9:25 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.8 hours before the alert went out and 261 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: 1868 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 1819 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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
Jun 23, 9:24 PM CDT	Tornado Watch	SPC	Beltrami, Clearwater, Itasca, Kittson, Koochiching, Lake of the Woods and 7 more	5 hr
Jun 24, 4:03 PM CDT	Mesoscale Discussion	SPC	Kittson	117 min
Jun 24, 3:46 PM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Dunn, Golden Valley, Grant and 4 more	2 hr

Nearby

Mesoscale Discussions in North Dakota, 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.