Alert archive / Kentucky / Mesoscale Discussions in 2018

Mesoscale Discussion 44

January 22, 2018Ohio County, Switzerland County, Indiana; 36 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jan 22, 2018, 8:06 PM EST for Ohio County, Switzerland County, Indiana; 36 counties in Kentucky. It was in force for 24 min.

The area

The outline as issued.

The facts

Issued: Jan 22, 2018, 8:06 PM EST (01:06 UTC)
Expired: Jan 22, 2018, 8:30 PM EST
In force: 24 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 38 counties

Ohio County, IN, Switzerland County, IN, Adair County, KY, Anderson County, KY, Barren County, KY, Boone County, KY, Bourbon County, KY, Boyle County, KY, Bullitt County, KY, Carroll County, KY, Casey County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Green County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Larue County, KY, Marion County, KY, Mercer County, KY, Metcalfe County, KY, Nelson County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Taylor County, KY, Washington County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 69 km from the middle of the area, began a volume at 01:05 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 00:00Z, 1.1 hours before the alert went out and 204 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: 394 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 455 m²/s²
0-3 km storm-relative helicity: 441 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Kentucky, 2018 Mesoscale Discussions in Indiana, 2018 Every mesoscale discussion in 2018

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.