Alert archive / North Dakota / Mesoscale Discussions in 2015

Mesoscale Discussion 1111

June 21, 201511 counties in Minnesota; 17 counties in North Dakota; 17 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2015, 11:25 PM CDT for 11 counties in Minnesota; 17 counties in North Dakota; 17 counties in South Dakota. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Jun 21, 2015, 11:25 PM CDT (04:25 UTC)
Expired
Jun 22, 2015, 1:00 AM CDT
In force
95 min
Issued by
the Storm Prediction Center
All 45 counties

Becker County, MN, Big Stone County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Otter Tail County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Adams County, ND, Barnes County, ND, Bowman County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, Hettinger 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, Slope County, ND, Brown County, SD, Butte County, SD, Campbell County, SD, Corson County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Harding County, SD, Marshall County, SD, McPherson County, SD, Perkins County, SD, Potter County, SD, Roberts County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 122 km from the middle of the area, began a volume at 04:26 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, 4.4 hours before the alert went out and 122 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 2015-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 495 joules per kilogram.LCLLFCEL10008507005003002001001 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 2015-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 square meters per square second.1939587897Sfc1 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
495 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
1751 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
0.1
Supercell composite
5.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 10:41 PM CDTSevere Thunderstorm WatchSPCBecker, Big Stone, Clay, Grant, Norman, Otter Tail and 3 more6 hr
Jun 22, 1:17 AM CDTMesoscale DiscussionSPCBig Stone, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 32 more58 min
Jun 22, 2:25 AM CDTSevere Thunderstorm WatchSPCAnoka, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 36 more6 hr
Jun 22, 3:16 AM CDTMesoscale DiscussionSPCBig Stone, Grant, Lac qui Parle, Lincoln, Pipestone, Rock and 1 more89 min
Jun 22, 4:53 AM CDTMesoscale DiscussionSPCAnoka, Big Stone, Blue Earth, Brown, Carver, Chippewa and 44 more2 hr
Jun 22, 6:03 AM CDTSevere Thunderstorm WatchSPCDodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more4 hr
Jun 22, 7:42 AM CDTMesoscale DiscussionSPCBlue Earth, Carver, Dakota, Dodge, Faribault, Fillmore and 16 more93 min
Jun 22, 2:50 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Carlton, Carver, Chisago and 10 more55 min
Jun 21, 8:32 PM CDTMesoscale DiscussionSPCAdams, Barnes, Billings, Bowman, Burleigh, Dickey and 25 more88 min

Nearby

Mesoscale Discussions in North Dakota, 2015Mesoscale Discussions in South Dakota, 2015Mesoscale Discussions in Minnesota, 2015Every mesoscale discussion in 2015

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.