Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1900

August 26, 20078 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2007, 10:07 PM MDT for 8 counties in North Dakota. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Aug 26, 2007, 10:07 PM MDT (04:07 UTC)
Expired: Aug 27, 2007, 12:00 AM MDT
In force: 113 min
Issued by: the Storm Prediction Center

Counties Adams County, ND, Burleigh County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, Morton County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 32 km from the middle of the area, began a volume at 04:09 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, 4.1 hours before the alert went out and 33 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: 1997 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 2248 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

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
Aug 26, 7:04 PM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Foster, Grand Forks, Griggs, LaMoure and 6 more	116 min
Aug 26, 9:25 PM MDT	Mesoscale Discussion	SPC	Barnes, Cass, LaMoure, Ransom, Traill	65 min
Aug 27, 2:02 AM MDT	Mesoscale Discussion	SPC	Dickey, Emmons, LaMoure, Logan, McIntosh, Ransom and 2 more	88 min
Aug 27, 2:14 AM MDT	Severe Thunderstorm Watch	SPC	Barnes, Burleigh, Cass, Dickey, Emmons, Griggs and 10 more	7 hr
Aug 27, 6:10 AM MDT	Mesoscale Discussion	SPC	Ransom, Richland, Sargent	95 min
Aug 27, 9:14 AM MDT	Mesoscale Discussion	SPC	Cass, Grand Forks, Griggs, Steele, Traill	91 min
Aug 27, 11:55 AM MDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Emmons, Grant, Griggs and 11 more	65 min
Aug 27, 1:29 PM MDT	Severe Thunderstorm Watch	SPC	Barnes, Cass, Dickey, Emmons, Griggs, Kidder and 10 more	8 hr
Aug 27, 4:34 PM MDT	Mesoscale Discussion	SPC	Cass, Richland	116 min

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; radar from the NEXRAD Level II archive.