Alert archive / Kentucky / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 246, NWS Louisville, KY

July 17, 2023Henry County, Oldham County, Shelby County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jul 17, 2023, 2:31 AM EDT for Henry County, Oldham County, Shelby County, Kentucky. It was in force for 14 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: Jul 17, 2023, 2:31 AM EDT (06:31 UTC)
Expired: Jul 17, 2023, 2:45 AM EDT
In force: 14 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Henry County, KY, Oldham County, KY, Shelby County, KY

The radar

The Louisville radar (KLVX), 74 km from the middle of the area, began a volume at 06:34 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

Lincoln, IL (KILX), launched 00:00Z, 6.5 hours before the alert went out and 350 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: 910 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1324 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

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 Jul 17, 1:27 AM EDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jul 17, 1:27 AM EDT, 1 hour 4 minutes before

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In the hours before

Special weather statement, Jul 17, 12:12 AM EDT, 2 hours 19 minutes before

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Special weather statement, Jul 17, 12:51 AM EDT, 1 hour 40 minutes before

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Special weather statement, Jul 17, 1:21 AM EDT, 1 hour 10 minutes before

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Special weather statement, Jul 17, 1:30 AM EDT, 1 hour 1 minute before

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Special weather statement, Jul 17, 1:53 AM EDT, 38 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
Jul 17, 1:53 AM EDT	Special Weather Statement	LMK	Oldham	22 min
Jul 17, 2:14 AM EDT	Severe Thunderstorm Warning	LMK	Henry, Oldham, Shelby	31 min
Jul 17, 4:36 AM EDT	Special Weather Statement	LMK	Spencer	24 min
Jul 17, 7:37 AM EDT	Areal Flood Advisory	LMK	Breckinridge, Grayson, Ohio	3 hr
Jul 17, 12:12 AM EDT	Special Weather Statement	LMK	Washington	33 min
Jul 17, 12:51 AM EDT	Special Weather Statement	LMK	Scott	24 min
Jul 17, 1:03 AM EDT	Severe Thunderstorm Warning	LMK	Jefferson, Scott	28 min
Jul 17, 1:21 AM EDT	Special Weather Statement	LMK	Scott	24 min
Jul 17, 1:30 AM EDT	Special Weather Statement	LMK	Clark	45 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2023 Every severe thunderstorm warning in 2023

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.