Alert archive / Indiana / Mesoscale Discussions in 2007

Mesoscale Discussion 1763

August 15, 2007Kendall County, Will County, Illinois; 22 counties in Indiana; 11 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 15, 2007, 9:11 PM CDT for Kendall County, Will County, Illinois; 22 counties in Indiana; 11 counties in Ohio. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Aug 15, 2007, 9:11 PM CDT (02:11 UTC)
Expired: Aug 15, 2007, 10:15 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center

All 35 counties

Kendall County, IL, Will County, IL, Adams County, IN, Allen County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Starke County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Allen County, OH, Auglaize County, OH, Defiance County, OH, Hardin County, OH, Henry County, OH, Logan County, OH, Mercer County, OH, Paulding County, OH, Putnam County, OH, Shelby County, OH, Van Wert County, OH

The radar

The Northern Indiana radar (KIWX), 59 km from the middle of the area, began a volume at 02:12 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.2 hours before the alert went out and 220 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: 4066 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1648 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.7

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 16, 7:36 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Christian, Fulton, Hancock and 11 more	54 min
Aug 16, 9:58 AM CDT	Severe Thunderstorm Watch	SPC	Bond, Christian, Clark, Clay, Crawford, Cumberland and 13 more	5 hr
Aug 16, 12:49 PM CDT	Mesoscale Discussion	SPC	Crawford, Edwards, Lawrence, Richland, Wabash	56 min
Aug 16, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	Edwards, Hamilton, Wabash, Wayne, White	4 hr
Aug 15, 9:35 PM CDT	Tornado Watch	SPC	Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 18 more	4 hr
Aug 15, 11:01 PM CDT	Mesoscale Discussion	SPC	Adams, Allen, DeKalb, Elkhart, Fulton, Huntington and 13 more	89 min
Aug 16, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	Dearborn, Ohio, Ripley, Switzerland	6 hr
Aug 16, 12:02 AM CDT	Severe Thunderstorm Watch	SPC	Auglaize, Champaign, Clark, Crawford, Darke, Delaware and 21 more	4 hr
Aug 16, 2:21 AM CDT	Mesoscale Discussion	SPC	Athens, Champaign, Clark, Clinton, Crawford, Darke and 32 more	24 min

Nearby

Mesoscale Discussions in Indiana, 2007 Mesoscale Discussions in Ohio, 2007 Mesoscale Discussions in Illinois, 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.