Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 218, NWS Louisville, KY

June 22, 20096 counties in Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 22, 2009, 6:43 PM CDT for 6 counties in Kentucky. It was in force for 47 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: Jun 22, 2009, 6:43 PM CDT (23:43 UTC)
Expired: Jun 22, 2009, 7:30 PM CDT
In force: 47 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Barren County, KY, Butler County, KY, Edmonson County, KY, Grayson County, KY, Hart County, KY, Warren County, KY

The radar

The Louisville radar (KLVX), 91 km from the middle of the area, began a volume at 23:45 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
Jun 22, 11:34 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.7 hours before the alert went out and 122 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: 1947 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1092 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.5

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 Jun 22, 1:56 PM CDT, 4 hours 47 minutes earlier.

Area forecast discussion, Jun 22, 1:56 PM CDT, 4 hours 47 minutes before

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Hazardous weather outlook, Jun 22, 2:24 PM CDT, 4 hours 19 minutes before

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In the hours before

Special weather statement, Jun 22, 4:39 PM CDT, 2 hours 4 minutes before

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Special weather statement, Jun 22, 5:04 PM CDT, 1 hour 39 minutes before

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Special weather statement, Jun 22, 5:25 PM CDT, 1 hour 18 minutes before

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Special weather statement, Jun 22, 5:32 PM CDT, 1 hour 11 minutes before

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Special weather statement, Jun 22, 6:05 PM CDT, 38 minutes before

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Local storm report, Jun 22, 6:35 PM CDT, 8 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
Jun 22, 8:12 AM CDT	Areal Flood Advisory	LMK	Jefferson, Oldham	118 min
Jun 22, 8:47 AM CDT	Severe Thunderstorm Warning	LMK	Jefferson	28 min
Jun 22, 9:30 AM CDT	Areal Flood Advisory	LMK	Anderson, Bullitt, Hardin, Jefferson, Larue, Marion and 4 more	93 min
Jun 22, 10:19 AM CDT	Areal Flood Advisory	LMK	Boyle, Casey, Green, Hardin, Hart, Larue and 5 more	107 min
Jun 22, 11:12 AM CDT	Areal Flood Advisory	LMK	Adair, Barren, Casey, Clinton, Cumberland, Green and 6 more	2 hr
Jun 22, 12:07 PM CDT	Severe Thunderstorm Warning	LMK	Clinton	23 min
Jun 22, 6:26 PM CDT	Severe Thunderstorm Warning	LMK	Butler, Ohio	49 min
Jun 22, 6:54 PM CDT	Severe Thunderstorm Warning	LMK	Butler, Logan, Warren	51 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; radar from the NEXRAD Level II archive.