Alert archive / Michigan / Mesoscale Discussions in 2020

Mesoscale Discussion 895

June 10, 202014 counties in Indiana; 20 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2020, 9:44 AM EDT for 14 counties in Indiana; 20 counties in Michigan. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jun 10, 2020, 9:44 AM EDT (13:44 UTC)
Expired: Jun 10, 2020, 11:15 AM EDT
In force: 91 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...severe thunderstorm watch likely
Chance of a watch: 80%

All 34 counties

Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ionia County, MI, Isabella County, MI, Kalamazoo County, MI, Kent County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Ottawa County, MI, Saint Joseph County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 78 km from the middle of the area, began a volume at 13:44 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

Detroit, MI (KDTX), launched 12:00Z, 1.7 hours before the alert went out and 212 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: 1134 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 651 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.7

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 10, 11:22 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 39 more	83 min
Jun 10, 11:54 AM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 49 more	6 hr
Jun 10, 1:58 PM EDT	Mesoscale Discussion	SPC	Dearborn, Franklin, Ohio, Ripley, Switzerland, Union	92 min
Jun 10, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more	6 hr
Jun 10, 10:59 AM EDT	Severe Thunderstorm Watch	SPC	Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 14 more	6 hr
Jun 10, 12:17 PM EDT	Mesoscale Discussion	SPC	Alcona, Alpena, Antrim, Arenac, Bay, Cheboygan and 15 more	58 min
Jun 10, 12:41 PM EDT	Severe Thunderstorm Watch	SPC	Alcona, Alpena, Arenac, Bay, Genesee, Gladwin and 19 more	7 hr
Jun 10, 3:03 PM EDT	Mesoscale Discussion	SPC	Branch, Calhoun, Eaton, Genesee, Hillsdale, Ingham and 13 more	87 min

Nearby

Mesoscale Discussions in Michigan, 2020 Mesoscale Discussions in Indiana, 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.