Alert archive / Indiana / Mesoscale Discussions in 2005

Mesoscale Discussion 2087

August 26, 200516 counties in Indiana; 13 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2005, 4:56 PM EDT for 16 counties in Indiana; 13 counties in Kentucky. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Aug 26, 2005, 4:56 PM EDT (20:56 UTC)
Expired: Aug 26, 2005, 6:00 PM EDT
In force: 64 min
Issued by: the Storm Prediction Center

All 29 counties

Clark County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Greene County, IN, Harrison County, IN, Jackson County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Scott County, IN, Sullivan County, IN, Washington County, IN, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Edmonson County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Jefferson County, KY, Larue County, KY, Meade County, KY, Ohio County, KY, Warren County, KY

The radar

The Louisville radar (KLVX), 51 km from the middle of the area, began a volume at 20:55 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.9 hours before the alert went out and 215 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: 572 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 692 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.4

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, 11:55 AM EDT	Severe Thunderstorm Watch	SPC	Daviess, Gibson, Knox, Pike, Posey, Vanderburgh and 1 more	7 hr
Aug 26, 3:41 PM EDT	Mesoscale Discussion	SPC	Daviess, Gibson, Knox, Pike, Posey, Vanderburgh and 1 more	64 min
Aug 26, 6:33 PM EDT	Mesoscale Discussion	SPC	Fulton	57 min

Nearby

Mesoscale Discussions in Indiana, 2005 Mesoscale Discussions in Kentucky, 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.