Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 221, NWS Louisville, KY

June 22, 20095 counties in Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 22, 2009, 7:32 PM CDT for 5 counties in Kentucky. It was in force for 43 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, 7:32 PM CDT (00:32 UTC)
Expired: Jun 22, 2009, 8:15 PM CDT
In force: 43 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Allen County, KY, Barren County, KY, Logan County, KY, Simpson County, KY, Warren County, KY

The radar

The Nashville radar (KOHX), 70 km from the middle of the area, began a volume at 00:33 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

Nashville Metro, TN (KBNA), launched 00:00Z, 0.5 hours before the alert went out and 83 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: 1562 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1193 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 6.5

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, 6:45 PM CDT, 47 minutes earlier.

Area forecast discussion, Jun 22, 6:45 PM CDT, 47 minutes before

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Hazardous weather outlook, Jun 22, 2:24 PM CDT, 5 hours 8 minutes before

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In the hours before

Special weather statement, Jun 22, 4:39 PM CDT, 2 hours 53 minutes before

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Special weather statement, Jun 22, 5:04 PM CDT, 2 hours 28 minutes before

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Special weather statement, Jun 22, 5:25 PM CDT, 2 hours 7 minutes before

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Special weather statement, Jun 22, 5:32 PM CDT, 2 hours before

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Special weather statement, Jun 22, 6:05 PM CDT, 1 hour 27 minutes before

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Local storm report, Jun 22, 6:35 PM CDT, 57 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, 7:17 PM CDT	Severe Thunderstorm Warning	LMK	Barren, Hart, Metcalfe	43 min
Jun 22, 7:42 PM CDT	Severe Thunderstorm Warning	LMK	Logan	18 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.