Alert archive / North Dakota / Mesoscale Discussions in 2008

Mesoscale Discussion 1946

July 28, 200812 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 28, 2008, 12:17 PM CDT for 12 counties in North Dakota. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jul 28, 2008, 12:17 PM CDT (17:17 UTC)
Expired: Jul 28, 2008, 1:15 PM CDT
In force: 58 min
Issued by: the Storm Prediction Center

Counties Burke County, ND, Burleigh County, ND, Dunn County, ND, Grant County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Sheridan County, ND, Stark County, ND, Ward County, ND

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 5.3 hours before the alert went out and 372 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: 491 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 1565 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 28, 3:02 AM CDT	Mesoscale Discussion	SPC	Billings, Golden Valley, McKenzie, Slope, Williams	88 min
Jul 28, 6:14 AM CDT	Severe Thunderstorm Watch	SPC	Billings, Burke, Burleigh, Divide, Dunn, Golden Valley and 13 more	8 hr
Jul 28, 7:50 AM CDT	Mesoscale Discussion	SPC	Billings, Burleigh, Dunn, Hettinger, Kidder, McHenry and 11 more	85 min
Jul 28, 3:38 PM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Dunn, Golden Valley, Grant and 5 more	67 min

Nearby

Mesoscale Discussions in North Dakota, 2008 Every mesoscale discussion in 2008

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.