Alert archive / Indiana / Mesoscale Discussions in 2018

Mesoscale Discussion 1532

October 6, 201815 counties in Indiana; Lenawee County, Monroe County, Michigan; 9 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Oct 6, 2018, 5:35 PM EDT for 15 counties in Indiana; Lenawee County, Monroe County, Michigan; 9 counties in Ohio. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Oct 6, 2018, 5:35 PM EDT (21:35 UTC)
Expired: Oct 6, 2018, 7:00 PM EDT
In force: 85 min
Issued by: the Storm Prediction Center

All 26 counties

Adams County, IN, Allen County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Miami County, IN, Noble County, IN, Steuben County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Lenawee County, MI, Monroe 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), 95 km from the middle of the area, began a volume at 21:33 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, 9.6 hours before the alert went out and 170 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: 964 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 165 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
Oct 6, 1:39 PM EDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Cass, Clay, Clinton and 21 more	2 hr
Oct 6, 2:31 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Benton, Boone, Carroll, Cass and 26 more	5 hr

Nearby

Mesoscale Discussions in Indiana, 2018 Mesoscale Discussions in Ohio, 2018 Mesoscale Discussions in Michigan, 2018 Every mesoscale discussion in 2018

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.