Alert archive / Indiana / Mesoscale Discussions in 2007

Mesoscale Discussion 1665

August 6, 200733 counties in Indiana; 6 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2007, 4:18 PM EDT for 33 counties in Indiana; 6 counties in Ohio. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Aug 6, 2007, 4:18 PM EDT (20:18 UTC)
Expired: Aug 6, 2007, 5:45 PM EDT
In force: 87 min
Issued by: the Storm Prediction Center

All 39 counties

Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Pulaski County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Wayne County, IN, Wells County, IN, White County, IN, Butler County, OH, Darke County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Warren County, OH

The radar

The Indianapolis radar (KIND), 89 km from the middle of the area, began a volume at 20:19 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, 8.3 hours before the alert went out and 244 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: 1165 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 84 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
Aug 5, 8:56 PM EDT	Mesoscale Discussion	SPC	Benton, Blackford, Boone, Carroll, Cass, Clinton and 28 more	64 min

Nearby

Mesoscale Discussions in Indiana, 2007 Mesoscale Discussions in Ohio, 2007 Every mesoscale discussion in 2007

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.