Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1348

July 1, 200719 counties in North Dakota; 6 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2007, 6:23 PM MDT for 19 counties in North Dakota; 6 counties in South Dakota. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jul 1, 2007, 6:23 PM MDT (00:23 UTC)
Expired: Jul 1, 2007, 7:30 PM MDT
In force: 67 min
Issued by: the Storm Prediction Center

All 25 counties

Adams County, ND, Burleigh County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Sheridan County, ND, Sioux County, ND, Stark County, ND, Stutsman County, ND, Wells County, ND, Campbell County, SD, Corson County, SD, Edmunds County, SD, McPherson County, SD, Perkins County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 13 km from the middle of the area, began a volume at 00:23 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.4 hours before the alert went out and 16 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: 2388 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1263 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 5.6

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 1, 8:38 PM MDT	Mesoscale Discussion	SPC	Adams, Bowman, Burleigh, Emmons, Grant, Hettinger and 8 more	67 min
Jul 2, 2:57 PM MDT	Tornado Watch	SPC	Burke, Divide, Mountrail, Renville, Ward, Williams	9 hr
Jul 2, 4:59 PM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Grand Forks, Griggs, LaMoure and 8 more	91 min
Jul 2, 4:33 PM MDT	Severe Thunderstorm Watch	SPC	Butte, Custer, Fall River, Harding, Lawrence, Meade and 2 more	6 hr

Nearby

Mesoscale Discussions in North Dakota, 2007 Mesoscale Discussions in South Dakota, 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; radar from the NEXRAD Level II archive.