Alert archive / North Dakota / Mesoscale Discussions in 2018

Mesoscale Discussion 649

June 5, 201815 counties in North Dakota; 8 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2018, 11:26 PM CDT for 15 counties in North Dakota; 8 counties in South Dakota. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2018, 11:26 PM CDT (04:26 UTC)
Expired: Jun 6, 2018, 1:00 AM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 23 counties

Barnes County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Brown County, SD, Campbell County, SD, Edmunds County, SD, Faulk County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 117 km from the middle of the area, began a volume at 04:27 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, 4.4 hours before the alert went out and 157 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: 1433 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 2088 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

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
Jun 5, 9:07 PM CDT	Severe Thunderstorm Watch	SPC	Barnes, Burleigh, Cass, Dickey, Eddy, Emmons and 17 more	6 hr
Jun 6, 2:48 AM CDT	Mesoscale Discussion	SPC	Brookings, Codington, Deuel, Grant, Hamlin, Kingsbury and 4 more	87 min

Nearby

Mesoscale Discussions in North Dakota, 2018 Mesoscale Discussions in South Dakota, 2018 Every mesoscale discussion in 2018

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.