Alert archive / Kentucky / Flash Flood Watches in 2018

Flash Flood Watch 4, NWS Jackson, KY

June 27, 201828 counties in Kentucky

NWS Jackson, KY issued this flash flood watch at Jun 27, 2018, 4:38 AM EDT for 28 counties in Kentucky. It took effect at Jun 27, 2018, 5:00 AM EDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jun 27, 2018, 4:38 AM EDT (08:38 UTC)
In effect from: Jun 27, 2018, 5:00 AM EDT
Expired: Jun 27, 2018, 8:00 PM EDT
In force: 15 hr
Issued by: NWS Jackson, KY
Flood severity: None

All 28 counties

Bath County, KY, Bell County, KY, Breathitt County, KY, Clay County, KY, Estill County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY

The radar

The Jackson,KY radar (KJKL), 38 km from the middle of the area, began a volume at 08:37 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, 8.6 hours before the alert went out and 297 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: 366 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 897 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 179 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 flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, KY wrote its last area forecast discussion before this flash flood watch went out at Jun 26, 3:45 PM EDT, 12 hours 53 minutes earlier.

Area forecast discussion, Jun 26, 3:45 PM EDT, 12 hours 53 minutes before

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Hazardous weather outlook, Jun 26, 4:11 PM EDT, 12 hours 27 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 8:40 PM EDT	Areal Flood Advisory	JKL	Jackson	11 hr
Jun 26, 10:01 PM EDT	Areal Flood Warning	JKL	Whitley	9 hr
Jun 26, 10:05 PM EDT	Areal Flood Advisory	JKL	Bell	9 hr
Jun 27, 4:11 AM EDT	River Flood Advisory	JKL	Estill	31 hr
Jun 27, 7:16 PM EDT	River Flood Advisory	JKL	Lee	11 hr

Nearby

Flash Flood Watches in Kentucky, 2018 Every flash flood watch in 2018

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.