Alert archive / North Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1509

August 10, 20164 counties in Minnesota; 7 counties in North Dakota; 7 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2016, 11:19 AM CDT for 4 counties in Minnesota; 7 counties in North Dakota; 7 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 10, 2016, 11:19 AM CDT (16:19 UTC)
Expired: Aug 10, 2016, 1:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Becker County, MN, Clay County, MN, Otter Tail County, MN, Wilkin County, MN, Cass County, ND, Dickey County, ND, LaMoure County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Brown County, SD, Campbell County, SD, Edmunds County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 78 km from the middle of the area, began a volume at 16:19 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 watches that followed

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

Severe Thunderstorm Watch 439Aug 10, 1:15 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 4.3 hours before the alert went out and 136 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: 1 J/kg
Mixed-layer CIN: -354 J/kg
Mixed-layer LCL: 752 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 365 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.7

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 10:19 PM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Chippewa, Clay, Douglas, Grant, Lac qui Parle and 8 more	8 hr
Aug 10, 1:05 AM CDT	Mesoscale Discussion	SPC	Big Stone, Lac qui Parle, Swift, Traverse	55 min
Aug 10, 3:30 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Big Stone, Chisago, Douglas, Grant and 20 more	60 min
Aug 10, 4:02 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Benton, Cass, Chisago, Crow Wing, Isanti and 7 more	4 hr
Aug 10, 1:15 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Big Stone, Clay, Douglas, Grant, Lac qui Parle and 8 more	7 hr
Aug 10, 3:45 PM CDT	Mesoscale Discussion	SPC	Becker, Big Stone, Cass, Chippewa, Clay, Crow Wing and 14 more	2 hr
Aug 10, 3:52 PM CDT	Mesoscale Discussion	SPC	Jackson	113 min
Aug 10, 4:04 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chisago, Hennepin, Isanti and 13 more	26 min
Aug 10, 4:20 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Benton, Carlton, Carver, Cass and 17 more	5 hr
Aug 10, 6:54 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Carlton, Cass, Chisago and 15 more	66 min
Aug 9, 7:30 PM CDT	Mesoscale Discussion	SPC	Adams, Bowman, Sioux	2 hr
Aug 9, 9:51 PM CDT	Mesoscale Discussion	SPC	Adams, Dickey, Emmons, Grant, LaMoure, Logan and 4 more	114 min
Aug 10, 3:53 PM CDT	Mesoscale Discussion	SPC	Billings, Divide, Golden Valley, McKenzie, Williams	97 min
Aug 10, 5:59 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Benson, Billings, Bottineau, Burke, Burleigh and 31 more	7 hr
Aug 10, 3:49 PM CDT	Mesoscale Discussion	SPC	Bennett, Dewey, Haakon, Hughes, Jackson, Jones and 7 more	56 min
Aug 10, 5:18 PM CDT	Mesoscale Discussion	SPC	Bennett, Butte, Custer, Fall River, Harding, Jackson and 5 more	57 min

Nearby

Mesoscale Discussions in North Dakota, 2016 Mesoscale Discussions in South Dakota, 2016 Mesoscale Discussions in Minnesota, 2016 Every mesoscale discussion in 2016

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.