Alert archive / Indiana / Mesoscale Discussions in 2010

Mesoscale Discussion 1010

June 18, 201021 counties in Indiana; 10 counties in Michigan; 7 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2010, 3:47 PM EDT for 21 counties in Indiana; 10 counties in Michigan; 7 counties in Ohio. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jun 18, 2010, 3:47 PM EDT (19:47 UTC)
Expired: Jun 18, 2010, 4:45 PM EDT
In force: 58 min
Issued by: the Storm Prediction Center

All 38 counties

Adams County, IN, Allen County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Barry County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Eaton County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Kalamazoo County, MI, Saint Joseph County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH

The radar

The Northern Indiana radar (KIWX), 18 km from the middle of the area, began a volume at 19:48 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, 7.8 hours before the alert went out and 237 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1056 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Jun 18, 1:29 PM EDT	Severe Thunderstorm Watch	SPC	Benton, Jasper, Lake, Newton, Porter	9 hr
Jun 18, 4:32 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Cass, DeKalb, Elkhart, Fulton, Huntington and 13 more	8 hr
Jun 18, 6:06 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Boone, Carroll and 34 more	54 min
Jun 18, 6:30 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Carroll and 36 more	6 hr
Jun 18, 7:56 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Boone, Clay, Clinton and 37 more	94 min

Nearby

Mesoscale Discussions in Indiana, 2010 Mesoscale Discussions in Michigan, 2010 Mesoscale Discussions in Ohio, 2010 Every mesoscale discussion in 2010

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.