Alert archive / Kentucky / Mesoscale Discussions in 2022

Mesoscale Discussion 5

January 1, 202216 counties in Kentucky; 10 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jan 1, 2022, 10:29 AM CST for 16 counties in Kentucky; 10 counties in Tennessee. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Jan 1, 2022, 10:29 AM CST (16:29 UTC)
Expired: Jan 1, 2022, 11:30 AM CST
In force: 61 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 60%

All 26 counties

Adair County, KY, Allen County, KY, Barren County, KY, Butler County, KY, Casey County, KY, Edmonson County, KY, Green County, KY, Hart County, KY, Larue County, KY, Logan County, KY, Marion County, KY, Metcalfe County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Benton County, TN, Cheatham County, TN, Dickson County, TN, Henry County, TN, Houston County, TN, Humphreys County, TN, Montgomery County, TN, Robertson County, TN, Stewart County, TN, Sumner County, TN

The radar

The Ft Campbell radar (KHPX), 36 km from the middle of the area, began a volume at 16:31 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 3Jan 1, 10:50 AM CST

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 4.5 hours before the alert went out and 70 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: 379 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 791 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 245 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 31, 9:31 PM CST	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bath, Bell and 67 more	2 hr
Dec 31, 11:57 PM CST	Tornado Watch	SPC	Adair, Allen, Barren, Butler, Calloway, Carlisle and 33 more	7 hr
Jan 1, 2:07 AM CST	Mesoscale Discussion	SPC	Allen, Barren, Butler, Calloway, Christian, Cumberland and 9 more	113 min
Jan 1, 10:50 AM CST	Tornado Watch	SPC	Adair, Allen, Barren, Boyle, Casey, Clinton and 14 more	7 hr
Jan 1, 12:38 PM CST	Mesoscale Discussion	SPC	Adair, Casey, Clay, Clinton, Cumberland, Estill and 17 more	97 min
Jan 1, 12:56 PM CST	Tornado Watch	SPC	Bell, Breathitt, Clay, Harlan, Jackson, Knott and 12 more	6 hr
Jan 1, 1:57 PM CST	Mesoscale Discussion	SPC	Bedford, Giles, Hardin, Lawrence, Lincoln, Marshall and 2 more	93 min
Jan 1, 3:27 PM CST	Mesoscale Discussion	SPC	Anderson, Bledsoe, Campbell, Coffee, Cumberland, Franklin and 14 more	93 min
Jan 1, 5:53 PM CST	Mesoscale Discussion	SPC	Anderson, Bledsoe, Blount, Bradley, Cumberland, Franklin and 19 more	67 min

Nearby

Mesoscale Discussions in Kentucky, 2022 Mesoscale Discussions in Tennessee, 2022 Every mesoscale discussion in 2022

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.