Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1022

June 6, 2007Richland County, Roosevelt County, Sheridan County, Montana; 9 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2007, 1:28 AM MDT for Richland County, Roosevelt County, Sheridan County, Montana; 9 counties in North Dakota. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2007, 1:28 AM MDT (07:28 UTC)
Expired: Jun 6, 2007, 3:00 AM MDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Billings County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, McKenzie County, ND, Mercer County, ND, Mountrail County, ND, Stark County, ND, Williams County, ND

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 7.5 hours before the alert went out and 224 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: 88 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 2002 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 6, 11:36 AM MDT	Mesoscale Discussion	SPC	Carter, Powder River	114 min
Jun 6, 12:04 PM MDT	Tornado Watch	SPC	Big Horn, Carter, Custer, Fallon, Powder River, Rosebud	6 hr
Jun 6, 5:19 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Custer, Fallon, Powder River, Rosebud	26 min
Jun 6, 5:47 PM MDT	Tornado Watch	SPC	Carter, Custer, Dawson, Fallon, Prairie, Richland and 1 more	7 hr
Jun 6, 5:09 PM MDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Burleigh, Dickey, Dunn and 19 more	2 hr

Nearby

Mesoscale Discussions in North Dakota, 2007 Mesoscale Discussions in Montana, 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.