Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 36, NWS Louisville, KY

February 18, 2009Logan County, Simpson County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Feb 18, 2009, 12:56 AM CST for Logan County, Simpson County, Kentucky. It was in force for 34 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: Feb 18, 2009, 12:56 AM CST (06:56 UTC)
Expired: Feb 18, 2009, 1:30 AM CST
In force: 34 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Logan County, KY, Simpson County, KY

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.9 hours before the alert went out and 76 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: 2010 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 389 m²/s²
0-3 km storm-relative helicity: 482 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 Feb 17, 11:38 PM CST, 1 hour 18 minutes earlier.

Area forecast discussion, Feb 17, 11:38 PM CST, 1 hour 18 minutes before

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Hazardous weather outlook, Feb 17, 7:46 PM CST, 5 hours 10 minutes before

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In the hours before

Special weather statement, Feb 18, 12:03 AM CST, 53 minutes before

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Special weather statement, Feb 18, 12:41 AM CST, 15 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
Feb 18, 10:10 AM CST	Severe Thunderstorm Warning	LMK	Allen, Logan, Simpson, Warren	35 min
Feb 18, 10:48 AM CST	Severe Thunderstorm Warning	LMK	Allen, Barren, Warren	42 min
Feb 18, 11:20 AM CST	Severe Thunderstorm Warning	LMK	Allen, Simpson	25 min
Feb 18, 11:26 AM CST	Severe Thunderstorm Warning	LMK	Adair, Barren, Cumberland, Metcalfe	49 min
Feb 18, 11:39 AM CST	Severe Thunderstorm Warning	LMK	Allen, Barren, Cumberland, Monroe	51 min
Feb 18, 11:50 AM CST	Severe Thunderstorm Warning	LMK	Marion, Nelson, Washington	25 min
Feb 18, 11:53 AM CST	Tornado Warning	LMK	Clinton, Cumberland, Russell	26 min
Feb 18, 12:14 PM CST	Severe Thunderstorm Warning	LMK	Allen, Clinton, Cumberland, Monroe	46 min
Feb 18, 12:15 PM CST	Severe Thunderstorm Warning	LMK	Mercer, Washington	30 min
Feb 18, 12:33 PM CST	Tornado Warning	LMK	Clinton, Cumberland	27 min
Feb 18, 12:39 PM CST	Severe Thunderstorm Warning	LMK	Garrard, Jessamine, Madison	21 min
Feb 18, 12:57 PM CST	Tornado Warning	LMK	Clinton	33 min
Feb 18, 1:04 PM CST	Severe Thunderstorm Warning	LMK	Clark, Madison	26 min
Feb 18, 1:53 PM CST	Severe Thunderstorm Warning	LMK	Madison	7 min
Feb 18, 12:10 PM CST	Severe Thunderstorm Warning	LMK	Crawford, Floyd, Harrison	35 min

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.