Alert archive / Kentucky / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 130, NWS Louisville, KY

August 12, 2013Jefferson County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Aug 12, 2013, 3:19 PM EDT for Jefferson County, Kentucky. It was in force for 31 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 12, 2013, 3:19 PM EDT (19:19 UTC)
Expired: Aug 12, 2013, 3:50 PM EDT
In force: 31 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Jefferson County, KY

The radar

The Louisville radar (KLVX), 34 km from the middle of the area, began a volume at 19:19 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, 7.3 hours before the alert went out and 212 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: 244 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 820 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 12, 1:22 PM EDT, 1 hour 57 minutes earlier.

Area forecast discussion, Aug 12, 1:22 PM EDT, 1 hour 57 minutes before

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Hazardous weather outlook, Aug 12, 12:17 PM EDT, 3 hours 2 minutes before

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In the hours before

Special weather statement, Aug 12, 1:34 PM EDT, 1 hour 45 minutes before

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Special weather statement, Aug 12, 1:59 PM EDT, 1 hour 20 minutes before

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Special weather statement, Aug 12, 2:30 PM EDT, 49 minutes before

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Special weather statement, Aug 12, 2:42 PM EDT, 37 minutes before

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Special weather statement, Aug 12, 3:00 PM EDT, 19 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 6:24 AM EDT	Special Weather Statement	LMK	Butler	31 min
Aug 12, 10:14 AM EDT	Areal Flood Advisory	LMK	Logan	3 hr
Aug 12, 1:34 PM EDT	Special Weather Statement	LMK	Fayette, Jessamine	31 min
Aug 12, 1:59 PM EDT	Special Weather Statement	LMK	Clark	31 min
Aug 12, 2:42 PM EDT	Special Weather Statement	LMK	Clark	28 min
Aug 12, 3:00 PM EDT	Special Weather Statement	LMK	Jefferson	30 min
Aug 12, 3:54 PM EDT	Special Weather Statement	LMK	Meade	56 min
Aug 12, 3:58 PM EDT	Special Weather Statement	LMK	Shelby	32 min
Aug 12, 4:31 PM EDT	Areal Flood Advisory	LMK	Breckinridge, Hancock, Meade	3 hr
Aug 12, 5:26 PM EDT	Special Weather Statement	LMK	Bullitt, Nelson, Spencer	59 min
Aug 12, 6:08 PM EDT	Special Weather Statement	LMK	Bourbon, Fayette, Nicholas, Scott, Woodford	87 min
Aug 12, 6:25 PM EDT	Areal Flood Advisory	LMK	Anderson, Bourbon, Fayette, Franklin, Harrison, Jessamine and 2 more	3 hr
Aug 12, 6:35 PM EDT	Areal Flood Advisory	LMK	Breckinridge, Grayson, Hancock, Ohio	3 hr
Aug 12, 6:38 PM EDT	Special Weather Statement	LMK	Boyle, Mercer, Washington	87 min
Aug 12, 7:19 PM EDT	Flash Flood Warning	LMK	Fayette, Jessamine, Scott, Woodford	3 hr
Aug 12, 7:26 PM EDT	Special Weather Statement	LMK	Butler, Edmonson, Grayson, Ohio, Warren	59 min
Aug 12, 7:33 PM EDT	Severe Thunderstorm Warning	LMK	Fayette	32 min
Aug 12, 7:42 PM EDT	Special Weather Statement	LMK	Boyle, Garrard, Lincoln	28 min
Aug 12, 7:51 PM EDT	Areal Flood Advisory	LMK	Grayson, Hardin, Larue, Nelson	3 hr
Aug 12, 2:30 PM EDT	Special Weather Statement	LMK	Floyd	30 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2013 Every severe thunderstorm warning 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.