Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1271

June 24, 200716 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2007, 8:11 PM CDT for 16 counties in North Dakota. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jun 24, 2007, 8:11 PM CDT (01:11 UTC)
Expired: Jun 24, 2007, 9:15 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center

Counties Benson County, ND, Burleigh County, ND, Cavalier County, ND, Eddy County, ND, McHenry County, ND, McLean County, ND, Mercer County, ND, Nelson County, ND, Oliver County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Sheridan County, ND, Towner County, ND, Walsh County, ND, Wells County, ND

The watches that followed

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

Severe Thunderstorm Watch 449Jun 24, 11:35 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.2 hours before the alert went out and 145 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: 3796 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1514 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 17.3

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
Jun 24, 7:11 PM CDT	Mesoscale Discussion	SPC	Adams	2 hr
Jun 24, 7:30 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 3 more	4 hr
Jun 24, 9:30 PM CDT	Mesoscale Discussion	SPC	Adams, Grant, Hettinger, Sioux, Stark	90 min
Jun 24, 10:47 PM CDT	Mesoscale Discussion	SPC	Benson, Billings, Bottineau, Bowman, Dunn, Golden Valley and 16 more	58 min
Jun 24, 11:36 PM CDT	Severe Thunderstorm Watch	SPC	Benson, Billings, Bottineau, Burleigh, Cavalier, Dunn and 31 more	7 hr
Jun 25, 3:31 AM CDT	Mesoscale Discussion	SPC	Bottineau, Cavalier, Dunn, McHenry, McLean, Mountrail and 6 more	89 min
Jun 25, 10:12 AM CDT	Mesoscale Discussion	SPC	Divide	93 min
Jun 25, 3:59 PM CDT	Mesoscale Discussion	SPC	Burleigh, Emmons, Grant, Kidder, Logan, Morton and 4 more	91 min
Jun 25, 5:48 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Dunn, Golden Valley, Hettinger and 3 more	8 hr
Jun 25, 6:57 PM CDT	Mesoscale Discussion	SPC	Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 3 more	2 hr

Nearby

Mesoscale Discussions in North 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.