Alert archive / Ohio / Mesoscale Discussions in 2007

Mesoscale Discussion 463

April 11, 200714 counties in Kentucky; 31 counties in Ohio; 9 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2007, 9:57 PM EDT for 14 counties in Kentucky; 31 counties in Ohio; 9 counties in West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 11, 2007, 9:57 PM EDT (01:57 UTC)
Expired: Apr 12, 2007, 12:00 AM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 54 counties

Bath County, KY, Boyd County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Greenup County, KY, Johnson County, KY, Lawrence County, KY, Lewis County, KY, Martin County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Rowan County, KY, Adams County, OH, Ashland County, OH, Athens County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Franklin County, OH, Gallia County, OH, Guernsey County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Meigs County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Cabell County, WV, Jackson County, WV, Lincoln County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 116 km from the middle of the area, began a volume at 01:59 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.0 hours before the alert went out and 114 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: 305 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 634 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in Ohio, 2007 Mesoscale Discussions in Kentucky, 2007 Mesoscale Discussions in West Virginia, 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.