Alert archive / Minnesota / Mesoscale Discussions in 2018

Mesoscale Discussion 924

June 28, 201823 counties in Minnesota; 4 counties in North Dakota; 5 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2018, 3:53 PM CDT for 23 counties in Minnesota; 4 counties in North Dakota; 5 counties in Wisconsin. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jun 28, 2018, 3:53 PM CDT (20:53 UTC)
Expired
Jun 28, 2018, 5:30 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 32 counties

Aitkin County, MN, Becker County, MN, Beltrami County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Hubbard County, MN, Itasca County, MN, Kanabec County, MN, Mahnomen County, MN, Mille Lacs County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Pine County, MN, Polk County, MN, Red Lake County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Cass County, ND, Grand Forks County, ND, Steele County, ND, Traill County, ND, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 126 km from the middle of the area, began a volume at 20:55 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

International Fa, MN (KINL), launched 12:00Z, 8.9 hours before the alert went out and 195 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, International Fa, MN at 12:00Z on 2018-06-28Temperature 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, International Fa, MN at 12:00Z on 2018-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.19395878Sfc1 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
2670 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
204 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 28, 11:16 AM CDTMesoscale DiscussionSPCAitkin, Becker, Benton, Big Stone, Carlton, Cass and 20 more89 min
Jun 28, 1:33 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Beltrami, Carlton, Cass, Clay and 14 more6 hr
Jun 28, 5:23 PM CDTMesoscale DiscussionSPCAitkin, Becker, Carlton, Cass, Clay, Clearwater and 7 more97 min
Jun 28, 3:52 AM CDTMesoscale DiscussionSPCBarnes, Burleigh, Cass, Dickey, Emmons, Foster and 12 more83 min
Jun 28, 7:40 AM CDTMesoscale DiscussionSPCAdams, Barnes, Burleigh, Cass, Dickey, Emmons and 18 more3 hr
Jun 28, 1:06 PM CDTMesoscale DiscussionSPCBenson, Burleigh, Eddy, Foster, Grand Forks, Griggs and 8 more114 min
Jun 28, 3:16 PM CDTTornado WatchSPCAdams, Barnes, Benson, Billings, Bowman, Burleigh and 31 more8 hr
Jun 28, 3:35 PM CDTMesoscale DiscussionSPCBillings, Bowman, Golden Valley, McKenzie, Slope2 hr
Jun 28, 6:59 PM CDTMesoscale DiscussionSPCAdams, Benson, Billings, Bowman, Burleigh, Dunn and 22 more91 min

Nearby

Mesoscale Discussions in Minnesota, 2018Mesoscale Discussions in Wisconsin, 2018Mesoscale Discussions in North Dakota, 2018Every 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.