Alert archive / Indiana / Mesoscale Discussions in 2016

Mesoscale Discussion 138

February 24, 20168 counties in Illinois; 9 counties in Indiana; Berrien County, Cass County, Van Buren County, Michigan

The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2016, 6:34 AM CST for 8 counties in Illinois; 9 counties in Indiana; Berrien County, Cass County, Van Buren County, Michigan. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Feb 24, 2016, 6:34 AM CST (12:34 UTC)
Expired: Feb 24, 2016, 11:30 AM CST
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Champaign County, IL, DeWitt County, IL, Ford County, IL, Iroquois County, IL, Kankakee County, IL, Macon County, IL, McLean County, IL, Piatt County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, LaPorte County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Berrien County, MI, Cass County, MI, Van Buren County, MI

The radar

The Chicago radar (KLOT), 91 km from the middle of the area, began a volume at 12:37 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 0.6 hours before the alert went out and 344 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: 470 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 729 m²/s²
0-3 km storm-relative helicity: 886 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.

Issued	Product	Office	Counties	Lasted
Feb 24, 2:37 AM CST	Mesoscale Discussion	SPC	Bond, Christian, Clinton, Effingham, Fayette, Macoupin and 9 more	5 hr
Feb 24, 10:49 AM CST	Mesoscale Discussion	SPC	Allegan, Arenac, Barry, Bay, Calhoun, Cass and 22 more	6 hr

Nearby

Mesoscale Discussions in Indiana, 2016 Mesoscale Discussions in Illinois, 2016 Mesoscale Discussions in Michigan, 2016 Every mesoscale discussion in 2016

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.