Alert archive / Kentucky / Areal Flood Warnings in 2011

Areal Flood Warning 13, NWS Jackson, KY

April 28, 2011Knox County, Kentucky

NWS Jackson, KY issued this areal flood warning at Apr 28, 2011, 8:21 AM EDT for Knox County, Kentucky. It was in force for 30 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 28, 2011, 8:21 AM EDT (12:21 UTC)
Expired: Apr 29, 2011, 2:30 PM EDT
In force: 30 hr
Issued by: NWS Jackson, KY
Area: Storm-based polygon
Flood severity: None

County Knox County, KY

The radar

The Knoxville radar (KMRX), 90 km from the middle of the area, began a volume at 12:21 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, 0.4 hours before the alert went out and 260 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 103 kt
0-1 km storm-relative helicity: -82 m²/s²
0-3 km storm-relative helicity: -80 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 areal flood warning 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 areal flood warning went out at Apr 28, 7:38 AM EDT, 43 minutes earlier.

Area forecast discussion, Apr 28, 7:38 AM EDT, 43 minutes before

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Hazardous weather outlook, Apr 28, 4:23 AM EDT, 3 hours 58 minutes before

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In the hours before

Special weather statement, Apr 28, 2:38 AM EDT, 5 hours 43 minutes before

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Special weather statement, Apr 28, 5:03 AM EDT, 3 hours 18 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
Apr 27, 8:16 PM EDT	Severe Thunderstorm Warning	JKL	Floyd, Knott, Letcher, Pike	44 min
Apr 27, 8:46 PM EDT	Severe Thunderstorm Warning	JKL	Pike	44 min
Apr 27, 8:53 PM EDT	Areal Flood Advisory	JKL	Bell, Breathitt, Floyd, Harlan, Johnson, Knott and 7 more	6 hr
Apr 27, 9:17 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Knox, McCreary, Whitley	43 min
Apr 27, 10:28 PM EDT	Flash Flood Warning	JKL	Bath, Fleming, Montgomery, Rowan	4 hr
Apr 27, 10:31 PM EDT	Areal Flood Warning	JKL	Bell, Clay, Harlan, Knox, Leslie, Letcher and 2 more	9 hr
Apr 27, 11:08 PM EDT	Areal Flood Advisory	JKL	Bath, Breathitt, Clay, Elliott, Fleming, Floyd and 12 more	6 hr
Apr 28, 12:03 AM EDT	River Flood Advisory	JKL	Estill, Powell	54 hr
Apr 28, 1:58 AM EDT	Areal Flood Warning	JKL	Clay, Knox, Laurel, McCreary, Wayne, Whitley	8 hr
Apr 28, 5:57 AM EDT	River Flood Advisory	JKL	Clay	16 hr
Apr 28, 7:00 AM EDT	River Flood Advisory	JKL	Lee	47 hr
Apr 28, 7:00 AM EDT	River Flood Advisory	JKL	Estill	54 hr
Apr 28, 8:57 AM EDT	River Flood Advisory	JKL	Owsley	26 hr
Apr 28, 10:05 AM EDT	Areal Flood Warning	JKL	McCreary	12 hr
Apr 28, 4:06 PM EDT	River Flood Warning	JKL	Estill	22 hr

Nearby

Areal Flood Warnings in Kentucky, 2011 Every areal flood warning in 2011

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.