Alert archive / North Dakota / Mesoscale Discussions in 2020

Mesoscale Discussion 1063

June 30, 202024 counties in North Dakota; 8 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2020, 8:38 PM CDT for 24 counties in North Dakota; 8 counties in South Dakota. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jun 30, 2020, 8:38 PM CDT (01:38 UTC)
Expired: Jun 30, 2020, 9:45 PM CDT
In force: 67 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 319

All 32 counties

Barnes County, ND, Benson County, ND, Cass County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, LaMoure County, ND, Nelson County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Rolette County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Hamlin County, SD, Marshall County, SD, Roberts County, SD, Spink County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 97 km from the middle of the area, began a volume at 01:43 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, 1.6 hours before the alert went out and 178 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: 481 J/kg
Mixed-layer CIN: -213 J/kg
Mixed-layer LCL: 641 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

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 30, 9:26 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Bon Homme, Brookings, Charles Mix, Clay and 16 more	2 hr

Nearby

Mesoscale Discussions in North Dakota, 2020 Mesoscale Discussions in South Dakota, 2020 Every mesoscale discussion in 2020

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.