Alert archive / South Dakota / Mesoscale Discussions in 2020

Mesoscale Discussion 861

June 6, 202031 counties in North Dakota; 32 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2020, 8:29 PM CDT for 31 counties in North Dakota; 32 counties in South Dakota. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Jun 6, 2020, 8:29 PM CDT (01:29 UTC)
Expired
Jun 6, 2020, 10:00 PM CDT
In force
91 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 264
All 63 counties

Benson County, ND, Billings County, ND, Burke County, ND, Burleigh County, ND, Dickey County, ND, Dunn County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Renville County, ND, Sargent County, ND, Sheridan County, ND, Sioux County, ND, Stark County, ND, Stutsman County, ND, Ward County, ND, Wells County, ND, Aurora County, SD, Beadle County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Charles Mix County, SD, Clark County, SD, Corson County, SD, Davison County, SD, Day County, SD, Dewey County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Gregory County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Miner County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Sully County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 39 km from the middle of the area, began a volume at 01:31 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.5 hours before the alert went out and 38 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2020-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2020-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 293 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1734 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
293 m²/s²
0-3 km storm-relative helicity
582 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.

IssuedProductOfficeCountiesLasted
Jun 6, 9:11 PM CDTSevere Thunderstorm WatchSPCBarnes, Benson, Bottineau, Burke, Burleigh, Dickey and 31 more6 hr
Jun 6, 11:34 PM CDTMesoscale DiscussionSPCBurleigh, Dickey, Emmons, Kidder, Logan, McIntosh and 3 more86 min
Jun 7, 2:18 AM CDTMesoscale DiscussionSPCGrand Forks, Pembina, Walsh117 min
Jun 7, 1:39 PM CDTMesoscale DiscussionSPCBarnes, Cass, Grand Forks, Pembina, Ransom, Richland and 4 more3 hr
Jun 7, 3:06 PM CDTTornado WatchSPCBarnes, Benson, Cass, Cavalier, Dickey, Eddy and 19 more7 hr
Jun 7, 3:59 PM CDTMesoscale DiscussionSPCBillings, Bowman, Burke, Divide, Dunn, Golden Valley and 9 more2 hr
Jun 7, 5:55 PM CDTMesoscale DiscussionSPCBarnes, Cass, Dickey, Eddy, Foster, Grand Forks and 11 more2 hr
Jun 7, 2:04 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brown, Brule, Buffalo, Campbell and 25 more116 min
Jun 7, 3:31 PM CDTSevere Thunderstorm WatchSPCBeadle, Bennett, Brown, Brule, Buffalo, Campbell and 21 more8 hr
Jun 7, 6:00 PM CDTMesoscale DiscussionSPCBennett, Brown, Buffalo, Campbell, Edmunds, Faulk and 15 more90 min

Nearby

Mesoscale Discussions in South Dakota, 2020Mesoscale Discussions in North Dakota, 2020Every 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.