Alert archive / Kentucky / Flash Flood Watches in 2017

Flash Flood Watch 6, NWS Jackson, KY

June 18, 201722 counties in Kentucky

NWS Jackson, KY issued this flash flood watch at Jun 18, 2017, 3:23 PM EDT for 22 counties in Kentucky. It took effect at Jun 19, 2017, 12:00 AM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 18, 2017, 3:23 PM EDT (19:23 UTC)
In effect from
Jun 19, 2017, 12:00 AM EDT
Expired
Jun 19, 2017, 3:59 AM EDT
In force
4 hr
Issued by
NWS Jackson, KY
Flood severity
None
All 22 counties

Bell County, KY, Breathitt County, KY, Clay County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, McCreary County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY, Whitley County, KY

The radar

The Jackson,KY radar (KJKL), 45 km from the middle of the area, began a volume at 19:25 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.4 hours before the alert went out and 246 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2017-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 950 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2017-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
950 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
786 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.4
Supercell composite
4.3

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 5:21 PM EDTSpecial Weather StatementJKLBath, Rowan24 min
Jun 18, 5:47 PM EDTSpecial Weather StatementJKLBath, Fleming28 min
Jun 18, 5:58 PM EDTAreal Flood AdvisoryJKLBath, Fleming, Rowan3 hr
Jun 18, 6:20 PM EDTSpecial Weather StatementJKLBath, Estill, Fleming, Lee, Menifee, Montgomery and 1 more25 min
Jun 18, 7:01 PM EDTAreal Flood AdvisoryJKLFleming, Rowan3 hr

Nearby

Flash Flood Watches in Kentucky, 2017Every flash flood watch in 2017

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.