Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 206, NWS Jackson, KY

August 4, 2009Harlan County, Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at Aug 4, 2009, 5:39 PM EDT for Harlan County, Kentucky. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 4, 2009, 5:39 PM EDT (21:39 UTC)
Expired: Aug 4, 2009, 6:04 PM EDT
In force: 25 min
Issued by: NWS Jackson, KY
Area: Storm-based polygon

County Harlan County, KY

The radar

The Knoxville radar (KMRX), 78 km from the middle of the area, began a volume at 21:40 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 4, 4:29 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.7 hours before the alert went out and 309 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: 3 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 1471 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 71 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 severe thunderstorm 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 severe thunderstorm warning went out at Aug 4, 3:45 PM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Aug 4, 3:45 PM EDT, 1 hour 54 minutes before

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Hazardous weather outlook, Aug 4, 5:03 PM EDT, 36 minutes before

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In the hours before

Special weather statement, Aug 4, 4:35 PM EDT, 1 hour 4 minutes before

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Local storm report, Aug 4, 4:53 PM EDT, 46 minutes before

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Local storm report, Aug 4, 5:01 PM EDT, 38 minutes before

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Local storm report, Aug 4, 5:26 PM EDT, 13 minutes before

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Special weather statement, Aug 4, 5:28 PM EDT, 11 minutes before

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Local storm report, Aug 4, 5:32 PM EDT, 7 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
Aug 4, 10:11 AM EDT	Severe Thunderstorm Warning	JKL	Johnson, Martin	29 min
Aug 4, 10:15 AM EDT	Areal Flood Advisory	JKL	Bath, Menifee, Montgomery	3 hr
Aug 4, 10:43 AM EDT	Flash Flood Warning	JKL	Bath, Menifee, Montgomery	4 hr
Aug 4, 10:57 AM EDT	Flash Flood Watch	JKL	Bath, Bell, Breathitt, Clay, Elliott, Estill and 27 more	25 hr
Aug 4, 11:01 AM EDT	Flash Flood Warning	JKL	Menifee, Powell, Wolfe	4 hr
Aug 4, 11:44 AM EDT	Areal Flood Advisory	JKL	Estill, Lee	3 hr
Aug 4, 2:20 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Clay, Knox	40 min
Aug 4, 2:40 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Harlan, Knox	50 min
Aug 4, 2:47 PM EDT	Flash Flood Warning	JKL	Bath, Breathitt, Estill, Lee, Menifee, Montgomery and 2 more	13 min
Aug 4, 2:57 PM EDT	Flash Flood Warning	JKL	Bath, Breathitt, Estill, Lee, Menifee, Montgomery and 3 more	4 hr
Aug 4, 3:06 PM EDT	Severe Thunderstorm Warning	JKL	Bath, Fleming, Menifee, Montgomery, Powell, Rowan	39 min
Aug 4, 3:26 PM EDT	Flash Flood Warning	JKL	Bell, Knox	4 hr
Aug 4, 3:27 PM EDT	Severe Thunderstorm Warning	JKL	Bath, Breathitt, Estill, Lee, Menifee, Montgomery and 4 more	48 min
Aug 4, 3:30 PM EDT	Severe Thunderstorm Warning	JKL	McCreary, Pulaski, Wayne, Whitley	45 min
Aug 4, 4:15 PM EDT	Severe Thunderstorm Warning	JKL	Knox, Laurel, McCreary, Pulaski, Whitley	45 min
Aug 4, 4:40 PM EDT	Areal Flood Advisory	JKL	Breathitt, Floyd, Knott, Magoffin, Menifee, Morgan and 2 more	3 hr
Aug 4, 4:53 PM EDT	Areal Flood Advisory	JKL	Bell, Knox, Laurel, McCreary, Pulaski, Wayne and 1 more	3 hr
Aug 4, 4:58 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Clay, Knox, Laurel, Leslie	32 min
Aug 4, 6:49 PM EDT	River Flood Advisory	JKL	Estill, Powell	29 hr
Aug 4, 6:57 PM EDT	Areal Flood Warning	JKL	Montgomery	10 hr

Nearby

Severe Thunderstorm Warnings in Kentucky, 2009 Every severe thunderstorm warning 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.