Alert archive / South Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1297

July 16, 2016Big Stone County, Traverse County, Wilkin County, Minnesota; 16 counties in North Dakota; 21 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 16, 2016, 12:27 PM CDT for Big Stone County, Traverse County, Wilkin County, Minnesota; 16 counties in North Dakota; 21 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 16, 2016, 12:27 PM CDT (17:27 UTC)
Expired: Jul 16, 2016, 2:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 40 counties

Big Stone County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Stutsman County, ND, Brown County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hyde County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Sully County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 91 km from the middle of the area, began a volume at 17:30 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 390Jul 16, 1:10 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 5.5 hours before the alert went out and 138 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: 34 J/kg
Mixed-layer CIN: -319 J/kg
Mixed-layer LCL: 1366 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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
Jul 16, 1:09 PM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Traverse	7 hr
Jul 16, 5:09 PM CDT	Mesoscale Discussion	SPC	Big Stone, Chippewa, Cottonwood, Jackson, Lac qui Parle, Lincoln and 10 more	96 min
Jul 16, 6:57 PM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 27 more	7 hr
Jul 16, 3:18 PM CDT	Mesoscale Discussion	SPC	Barnes, Burleigh, Dickey, Emmons, Grant, Kidder and 9 more	87 min
Jul 16, 3:33 PM CDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Custer, Fall River, Haakon, Harding and 10 more	6 hr

Nearby

Mesoscale Discussions in South Dakota, 2016 Mesoscale Discussions in North 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.