Alert archive / Kentucky / Mesoscale Discussions in 2006

Mesoscale Discussion 834

May 10, 20065 counties in Illinois; 5 counties in Indiana; 11 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at May 10, 2006, 3:42 PM CDT for 5 counties in Illinois; 5 counties in Indiana; 11 counties in Kentucky. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2006, 3:42 PM CDT (20:42 UTC)
Expired: May 10, 2006, 5:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 21 counties

Gallatin County, IL, Hardin County, IL, Massac County, IL, Pope County, IL, Saline County, IL, Perry County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Caldwell County, KY, Crittenden County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, McLean County, KY, Union County, KY, Webster County, KY

The radar

The Evansville,IN radar (KVWX), 60 km from the middle of the area, began a volume at 20:44 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.

Tornado Watch 339May 10, 6:00 PM CDT

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.7 hours before the alert went out and 201 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: 149 J/kg
Mixed-layer CIN: -222 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

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 10, 1:38 PM CDT	Mesoscale Discussion	SPC	Champaign, Clark, Coles, Cumberland, Douglas, Edgar and 2 more	2 hr
May 10, 6:01 PM CDT	Tornado Watch	SPC	Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 34 more	4 hr

Nearby

Mesoscale Discussions in Kentucky, 2006 Mesoscale Discussions in Illinois, 2006 Mesoscale Discussions in Indiana, 2006 Every mesoscale discussion in 2006

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.