Alert archive / Indiana / Mesoscale Discussions in 2004

Mesoscale Discussion 2131

August 27, 200414 counties in Indiana; 12 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2004, 12:10 PM EST for 14 counties in Indiana; 12 counties in Ohio. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Aug 27, 2004, 12:10 PM EST (17:10 UTC)
Expired: Aug 27, 2004, 2:45 PM EST
In force: 3 hr
Issued by: the Storm Prediction Center

All 26 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, DeKalb County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Miami County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Defiance County, OH, Fulton County, OH, Hancock County, OH, Henry County, OH, Lucas County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Sandusky County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Northern Indiana radar (KIWX), 93 km from the middle of the area, began a volume at 17:11 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, 5.2 hours before the alert went out and 190 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: 1956 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.0

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 26, 11:53 PM EST	Mesoscale Discussion	SPC	Lake	97 min
Aug 27, 1:25 AM EST	Severe Thunderstorm Watch	SPC	Benton, Jasper, Lake, LaPorte, Newton, Porter and 3 more	6 hr
Aug 27, 4:36 AM EST	Mesoscale Discussion	SPC	Benton, Jasper, Lake, LaPorte, Newton, Porter and 3 more	84 min
Aug 27, 6:33 AM EST	Mesoscale Discussion	SPC	Allen, Benton, Boone, Carroll, Cass, Clinton and 22 more	27 min

Nearby

Mesoscale Discussions in Indiana, 2004 Mesoscale Discussions in Ohio, 2004 Every mesoscale discussion in 2004

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.