Alert archive / Kentucky / Flash Flood Watches in 2013

Flash Flood Watch 3, NWS Jackson, KY

July 21, 201333 counties in Kentucky

NWS Jackson, KY issued this flash flood watch at Jul 21, 2013, 9:44 AM EDT for 33 counties in Kentucky. It was in force for 33 hr.

The area

The counties it named.

The facts

Issued: Jul 21, 2013, 9:44 AM EDT (13:44 UTC)
Expired: Jul 22, 2013, 6:15 PM EDT
In force: 33 hr
Issued by: NWS Jackson, KY
Flood severity: None

All 33 counties

Bath County, KY, Bell County, KY, Breathitt County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin 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, Rowan County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY

The radar

The Jackson,KY radar (KJKL), 26 km from the middle of the area, began a volume at 13:44 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, 1.7 hours before the alert went out and 218 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: 302 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 54 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 Jul 21, 9:29 AM EDT, 15 minutes earlier.

Area forecast discussion, Jul 21, 9:29 AM EDT, 15 minutes before

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Hazardous weather outlook, Jul 21, 3:51 AM EDT, 5 hours 53 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
Jul 21, 11:20 AM EDT	Areal Flood Advisory	JKL	McCreary, Pulaski, Wayne	6 hr
Jul 21, 2:33 PM EDT	Areal Flood Advisory	JKL	Floyd, Martin, Pike	4 hr
Jul 21, 3:19 PM EDT	Areal Flood Advisory	JKL	Floyd, Pike	3 hr
Jul 21, 3:24 PM EDT	Flash Flood Warning	JKL	Floyd, Pike	3 hr
Jul 21, 4:45 PM EDT	Areal Flood Advisory	JKL	Floyd, Magoffin	3 hr
Jul 21, 4:46 PM EDT	Areal Flood Advisory	JKL	Magoffin, Morgan	6 hr
Jul 21, 6:06 PM EDT	Areal Flood Advisory	JKL	Breathitt, Floyd, Johnson, Knott, Magoffin, Morgan and 1 more	4 hr
Jul 21, 6:12 PM EDT	Areal Flood Advisory	JKL	Menifee, Morgan, Wolfe	6 hr
Jul 21, 6:23 PM EDT	Areal Flood Advisory	JKL	Breathitt, Lee, Wolfe	67 min
Jul 21, 6:49 PM EDT	Flash Flood Warning	JKL	Menifee, Morgan, Wolfe	6 hr

Nearby

Flash Flood Watches in Kentucky, 2013 Every flash flood watch in 2013

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.