Alert archive / North Dakota / Mesoscale Discussions in 2011

Mesoscale Discussion 1548

July 8, 20116 counties in Minnesota; 12 counties in North Dakota; Marshall County, Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2011, 10:37 PM CDT for 6 counties in Minnesota; 12 counties in North Dakota; Marshall County, Roberts County, South Dakota. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jul 8, 2011, 10:37 PM CDT (03:37 UTC)
Expired: Jul 9, 2011, 12:00 AM CDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Big Stone County, MN, Clay County, MN, Grant County, MN, Stevens County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Foster County, ND, Griggs County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Stutsman County, ND, Marshall County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 107 km from the middle of the area, began a volume at 03:39 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

Aberdeen, SD (KABR), launched 00:00Z, 3.6 hours before the alert went out and 203 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: 975 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1645 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.2

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 8, 8:57 PM CDT	Mesoscale Discussion	SPC	Bennett, Corson, Dewey, Haakon, Jackson	63 min
Jul 8, 11:20 PM CDT	Mesoscale Discussion	SPC	Beadle, Brule, Buffalo, Hand, Hughes, Hyde and 2 more	85 min
Jul 9, 6:09 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brown, Brule, Buffalo, Charles Mix and 15 more	66 min

Nearby

Mesoscale Discussions in North Dakota, 2011 Mesoscale Discussions in Minnesota, 2011 Mesoscale Discussions in South Dakota, 2011 Every mesoscale discussion in 2011

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.