Alert archive / Kentucky / Flash Flood Watches in 2009

Flash Flood Watch 4, NWS Jackson, KY

May 27, 200933 counties in Kentucky

NWS Jackson, KY issued this flash flood watch at May 27, 2009, 4:15 PM EDT for 33 counties in Kentucky. It took effect at May 27, 2009, 5:00 PM EDT. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: May 27, 2009, 4:15 PM EDT (20:15 UTC)
In effect from: May 27, 2009, 5:00 PM EDT
Expired: May 27, 2009, 8:04 PM EDT
In force: 3 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 20:18 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, 8.3 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: 973 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 574 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -85 m²/s²
0-3 km storm-relative helicity: -70 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 May 27, 3:30 PM EDT, 45 minutes earlier.

Area forecast discussion, May 27, 3:30 PM EDT, 45 minutes before

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Hazardous weather outlook, May 27, 3:44 AM EDT, 12 hours 31 minutes before

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In the hours before

Special weather statement, May 27, 3:34 PM EDT, 41 minutes before

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Special weather statement, May 27, 3:56 PM EDT, 19 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
May 26, 9:15 PM EDT	Areal Flood Advisory	JKL	Leslie	60 min
May 26, 11:39 PM EDT	Areal Flood Advisory	JKL	Clay, Leslie	66 min
May 27, 3:44 PM EDT	Areal Flood Advisory	JKL	Breathitt, Magoffin	58 min
May 27, 4:33 PM EDT	Areal Flood Advisory	JKL	Harlan	57 min
May 27, 5:19 PM EDT	Areal Flood Advisory	JKL	Estill, Powell	116 min
May 27, 5:43 PM EDT	Areal Flood Advisory	JKL	Bath, Fleming, Montgomery, Rowan	2 hr

Nearby

Flash Flood Watches in Kentucky, 2009 Every flash flood watch in 2009

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.