Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 730

May 6, 200716 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at May 6, 2007, 6:04 PM CDT for 16 counties in North Dakota. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 6, 2007, 6:04 PM CDT (23:04 UTC)
Expired: May 6, 2007, 7:00 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center

Counties Benson County, ND, Burleigh County, ND, Eddy County, ND, Foster County, ND, Kidder County, ND, Logan County, ND, McHenry County, ND, McLean County, ND, Morton County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Sheridan County, ND, Stutsman County, ND, Towner County, ND, Wells County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.1 hours before the alert went out and 115 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: 659 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.0

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
May 5, 7:58 PM CDT	Mesoscale Discussion	SPC	Barnes, Burleigh, Cass, Dickey, Emmons, Foster and 10 more	2 hr
May 6, 12:07 PM CDT	Mesoscale Discussion	SPC	Adams, Burleigh, Dunn, Grant, Hettinger, McHenry and 8 more	113 min
May 6, 1:07 PM CDT	Tornado Watch	SPC	Barnes, Benson, Burleigh, Cavalier, Eddy, Emmons and 22 more	6 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.