Alert archive / Indiana / Mesoscale Discussions in 2005

Mesoscale Discussion 817

May 11, 200534 counties in Indiana; 15 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 11, 2005, 11:54 AM EST for 34 counties in Indiana; 15 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 11, 2005, 11:54 AM EST (16:54 UTC)
Expired: May 11, 2005, 2:00 PM EST
In force: 2 hr
Issued by: the Storm Prediction Center

All 49 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Johnson County, IN, Kosciusko County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Noble County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Steuben County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Allen County, OH, Auglaize County, OH, Darke County, OH, Defiance County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Mercer County, OH, Paulding County, OH, Putnam County, OH, Shelby 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 16:55 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.9 hours before the alert went out and 175 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: 358 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1333 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 87 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
May 11, 12:25 PM EST	Severe Thunderstorm Watch	SPC	Adams, Blackford, Delaware, Fayette, Hancock, Henry and 9 more	7 hr
May 11, 3:21 PM EST	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Boone, Carroll, Clay and 32 more	114 min
May 11, 3:40 PM EST	Severe Thunderstorm Watch	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Clay and 33 more	5 hr
May 11, 6:28 PM EST	Mesoscale Discussion	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Clay and 34 more	2 hr

Nearby

Mesoscale Discussions in Indiana, 2005 Mesoscale Discussions in Ohio, 2005 Every mesoscale discussion in 2005

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.