Alert archive / Kentucky / Flash Flood Watches in 2016

Flash Flood Watch 6, NWS Louisville, KY

July 27, 201646 counties in Kentucky

NWS Louisville, KY issued this flash flood watch at Jul 27, 2016, 2:33 PM CDT for 46 counties in Kentucky. It took effect at Jul 27, 2016, 9:21 PM CDT. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Jul 27, 2016, 2:33 PM CDT (19:33 UTC)
In effect from: Jul 27, 2016, 9:21 PM CDT
Expired: Jul 28, 2016, 3:58 PM CDT
In force: 19 hr
Issued by: NWS Louisville, KY
Flood severity: None

All 46 counties

Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bourbon County, KY, Boyle County, KY, Bullitt County, KY, Butler County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Garrard County, KY, Grayson 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, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 67 km from the middle of the area, began a volume at 19:34 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.6 hours before the alert went out and 199 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: 772 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1098 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Jul 27, 2:28 PM CDT, 5 minutes earlier.

Area forecast discussion, Jul 27, 2:28 PM CDT, 5 minutes before

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Hazardous weather outlook, Jul 27, 10:55 AM CDT, 3 hours 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 27, 4:36 AM CDT	Areal Flood Advisory	LMK	Cumberland, Monroe	3 hr
Jul 27, 5:09 AM CDT	Flash Flood Warning	LMK	Clinton, Cumberland, Monroe	3 hr
Jul 27, 7:37 AM CDT	Areal Flood Advisory	LMK	Taylor	3 hr
Jul 27, 7:40 AM CDT	Areal Flood Advisory	LMK	Ohio	3 hr
Jul 27, 8:30 AM CDT	Flash Flood Warning	LMK	Ohio	3 hr
Jul 27, 2:56 PM CDT	Special Weather Statement	LMK	Garrard, Madison	34 min
Jul 27, 4:20 PM CDT	Special Weather Statement	LMK	Shelby	25 min
Jul 27, 5:05 PM CDT	Special Weather Statement	LMK	Warren	25 min
Jul 27, 5:08 PM CDT	Special Weather Statement	LMK	Shelby	37 min
Jul 27, 5:34 PM CDT	Special Weather Statement	LMK	Jefferson	26 min
Jul 27, 6:02 PM CDT	Areal Flood Advisory	LMK	Jefferson	4 hr
Jul 26, 7:49 PM CDT	Special Weather Statement	LMK	Jefferson	26 min

Nearby

Flash Flood Watches in Kentucky, 2016 Every flash flood watch in 2016

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.