Alert archive / Michigan / Mesoscale Discussions in 2015

Mesoscale Discussion 2043

December 23, 201510 counties in Indiana; 11 counties in Michigan; 9 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Dec 23, 2015, 2:55 PM EST for 10 counties in Indiana; 11 counties in Michigan; 9 counties in Ohio. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Dec 23, 2015, 2:55 PM EST (19:55 UTC)
Expired: Dec 23, 2015, 4:30 PM EST
In force: 95 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 30 counties

Allen County, IN, DeKalb County, IN, Elkhart County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, Noble County, IN, Steuben County, IN, Wabash County, IN, Whitley County, IN, Branch County, MI, Calhoun County, MI, Cass County, MI, Hillsdale County, MI, Jackson County, MI, Kalamazoo County, MI, Lenawee County, MI, Monroe County, MI, Saint Joseph County, MI, Washtenaw County, MI, Wayne County, MI, Defiance County, OH, Fulton County, OH, Henry County, OH, Lucas County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Northern Indiana radar (KIWX), 59 km from the middle of the area, began a volume at 19:58 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

Detroit, MI (KDTX), launched 12:00Z, 7.9 hours before the alert went out and 187 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 584 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 224 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
Dec 23, 10:05 AM EST	Mesoscale Discussion	SPC	Gibson, Posey, Vanderburgh	85 min
Dec 23, 10:13 AM EST	Tornado Watch	SPC	Gibson, Posey, Vanderburgh	8 hr
Dec 23, 10:41 AM EST	Mesoscale Discussion	SPC	Lake, Newton	2 hr
Dec 23, 11:29 AM EST	Mesoscale Discussion	SPC	Posey, Vanderburgh	91 min
Dec 23, 1:06 PM EST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 31 more	84 min
Dec 23, 1:28 PM EST	Tornado Watch	SPC	Bartholomew, Boone, Brown, Carroll, Clark, Clay and 51 more	8 hr
Dec 23, 3:16 PM EST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 34 more	59 min
Dec 23, 5:59 PM EST	Mesoscale Discussion	SPC	Clark, Crawford, Dubois, Floyd, Harrison, Orange and 4 more	2 hr
Dec 23, 4:17 PM EST	Severe Thunderstorm Watch	SPC	Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 more	7 hr
Dec 23, 6:26 PM EST	Mesoscale Discussion	SPC	Ashland, Champaign, Clark, Clinton, Coshocton, Crawford and 27 more	2 hr

Nearby

Mesoscale Discussions in Michigan, 2015 Mesoscale Discussions in Indiana, 2015 Mesoscale Discussions in Ohio, 2015 Every 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.