Alert archive / Indiana / Mesoscale Discussions in 2016

Mesoscale Discussion 1387

July 24, 20164 states

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2016, 2:25 PM CDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jul 24, 2016, 2:25 PM CDT (19:25 UTC)
Expired: Jul 24, 2016, 5:00 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 33 counties

Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, McHenry County, IL, Will County, IL, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, White County, IN, Allegan County, MI, Berrien County, MI, Cass County, MI, Van Buren County, MI, Kenosha County, WI, Milwaukee County, WI, Racine County, WI, Walworth County, WI, Waukesha County, WI

The radar

The Chicago radar (KLOT), 82 km from the middle of the area, began a volume at 19:25 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

Lincoln, IL (KILX), launched 12:00Z, 7.4 hours before the alert went out and 217 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: 1677 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1136 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 28 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
Jul 23, 8:35 PM CDT	Mesoscale Discussion	SPC	Bureau, Cook, DeKalb, DuPage, Kane, Kendall and 4 more	85 min
Jul 24, 5:42 PM CDT	Mesoscale Discussion	SPC	Champaign, Cook, DuPage, Ford, Grundy, Iroquois and 10 more	93 min
Jul 24, 6:03 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Fulton, Hancock, Knox and 9 more	87 min
Jul 24, 10:08 AM CDT	Mesoscale Discussion	SPC	Lake, Mason, Newaygo, Oceana	97 min

Nearby

Mesoscale Discussions in Indiana, 2016 Mesoscale Discussions in Illinois, 2016 Mesoscale Discussions in Wisconsin, 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.