Alert archive / Kentucky / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 81, NWS Louisville, KY

April 13, 20206 counties in Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Apr 13, 2020, 4:05 AM CDT for 6 counties in Kentucky. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 13, 2020, 4:05 AM CDT (09:05 UTC)
Expired: Apr 13, 2020, 4:45 AM CDT
In force: 40 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Adair County, KY, Clinton County, KY, Cumberland County, KY, Metcalfe County, KY, Monroe County, KY, Russell County, KY

The radar

The Nashville radar (KOHX), 128 km from the middle of the area, began a volume at 09:08 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, 9.1 hours before the alert went out and 138 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 808 m above ground
0-6 km bulk shear: 87 kt
0-1 km storm-relative helicity: 526 m²/s²
0-3 km storm-relative helicity: 496 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 13, 2:11 AM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Apr 13, 2:11 AM CDT, 1 hour 54 minutes before

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Hazardous weather outlook, Apr 13, 2:21 AM CDT, 1 hour 44 minutes before

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In the hours before

Local storm report, Apr 13, 12:13 AM CDT, 3 hours 52 minutes before

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Local storm report, Apr 13, 12:15 AM CDT, 3 hours 50 minutes before

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Special weather statement, Apr 13, 3:48 AM CDT, 17 minutes before

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The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 1:19 AM CDT	Areal Flood Advisory	LMK	Breckinridge, Grayson, Meade, Ohio	116 min
Apr 13, 3:48 AM CDT	Special Weather Statement	LMK	Monroe	27 min
Apr 13, 4:45 AM CDT	Special Weather Statement	LMK	Clinton, Cumberland, Russell	45 min
Apr 13, 11:16 AM CDT	River Flood Advisory	LMK	Butler, Warren	29 hr
Apr 13, 6:50 PM CDT	Freeze Watch	LMK	Adair, Allen, Anderson, Barren, Bourbon, Boyle and 43 more	8 hr

Nearby

Severe Thunderstorm Warnings in Kentucky, 2020 Every severe thunderstorm warning in 2020

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.