Alert archive / Kentucky / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 139, NWS Louisville, KY

July 17, 2007Nicholas County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jul 17, 2007, 6:51 PM EDT for Nicholas County, Kentucky. It was in force for 39 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: Jul 17, 2007, 6:51 PM EDT (22:51 UTC)
Expired: Jul 17, 2007, 7:30 PM EDT
In force: 39 min
Issued by: NWS Louisville, KY
Area: Counties, with a storm outline in the text

County Nicholas County, KY

The radar

The Jackson,KY radar (KJKL), 103 km from the middle of the area, began a volume at 22:54 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, 10.9 hours before the alert went out and 123 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: 48 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1550 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 111 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 Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 4:50 PM EDT, 2 hours 1 minute earlier.

Area forecast discussion, Jul 17, 4:50 PM EDT, 2 hours 1 minute before

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Hazardous weather outlook, Jul 17, 6:41 PM EDT, 10 minutes before

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In the hours before

Special weather statement, Jul 17, 5:34 PM EDT, 1 hour 17 minutes before

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Special weather statement, Jul 17, 5:38 PM EDT, 1 hour 13 minutes before

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Special weather statement, Jul 17, 5:43 PM EDT, 1 hour 8 minutes before

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Special weather statement, Jul 17, 5:48 PM EDT, 1 hour 3 minutes before

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Special weather statement, Jul 17, 6:06 PM EDT, 45 minutes before

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Local storm report, Jul 17, 6:48 PM EDT, 3 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
Jul 17, 12:41 PM EDT	Severe Thunderstorm Warning	LMK	Clark	34 min
Jul 17, 1:14 PM EDT	Severe Thunderstorm Warning	LMK	Clark	31 min
Jul 17, 2:27 PM EDT	Severe Thunderstorm Warning	LMK	Fayette, Jessamine	33 min
Jul 17, 2:34 PM EDT	Severe Thunderstorm Warning	LMK	Clark	41 min
Jul 17, 6:20 PM EDT	Severe Thunderstorm Warning	LMK	Bourbon, Harrison, Scott	40 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2007 Every severe thunderstorm warning in 2007

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.