Alert archive / Kentucky / Flash Flood Warnings in 2026

Flash Flood Warning 116, NWS Louisville, KY

July 21, 2026Allen County, Simpson County, Warren County, Kentucky

NWS Louisville, KY issued this flash flood warning at Jul 21, 2026, 7:03 PM CDT for Allen County, Simpson County, Warren County, Kentucky. It was in force for 3 hr. 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 21, 2026, 7:03 PM CDT (00:03 UTC)
Expired: Jul 21, 2026, 10:00 PM CDT
In force: 3 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Allen County, KY, Simpson County, KY, Warren County, KY

The radar

The Nashville radar (KOHX), 66 km from the middle of the area, began a volume at 00:06 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, 0.1 hours before the alert went out and 80 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: 2403 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 13.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jul 21, 6:52 PM CDT, 11 minutes earlier.

Area forecast discussion, Jul 21, 6:52 PM CDT, 11 minutes before

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In the hours before

Local storm report, Jul 21, 6:36 PM CDT, 27 minutes before

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Local storm report, Jul 21, 6:37 PM CDT, 26 minutes before

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Local storm report, Jul 21, 6:39 PM CDT, 24 minutes before

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Local storm report, Jul 21, 6:48 PM CDT, 15 minutes before

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Local storm report, Jul 21, 6:50 PM CDT, 13 minutes before

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Local storm report, Jul 21, 6:56 PM CDT, 7 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 21, 7:01 PM CDT	Severe Thunderstorm Warning	LMK	Allen, Logan, Simpson, Warren	44 min
Jul 21, 7:12 PM CDT	Severe Thunderstorm Warning	LMK	Clinton, Cumberland	33 min
Jul 21, 7:14 PM CDT	Flash Flood Warning	LMK	Logan, Simpson	3 hr
Jul 21, 7:28 PM CDT	Areal Flood Warning	LMK	Bullitt, Hardin, Larue, Marion, Nelson	3 hr
Jul 21, 7:42 PM CDT	Flash Flood Warning	LMK	Allen, Simpson	3 hr
Jul 21, 7:51 PM CDT	Flash Flood Warning	LMK	Cumberland, Monroe	2 hr
Jul 21, 7:54 PM CDT	Areal Flood Warning	LMK	Boyle, Garrard, Mercer	3 hr

Nearby

Flash Flood Warnings in Kentucky, 2026 Every flash flood warning in 2026

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.