Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 199, NWS Louisville, KY

June 17, 2009Marion County, Nelson County, Washington County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 17, 2009, 4:07 PM EDT for Marion County, Nelson County, Washington County, Kentucky. It was in force for 23 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 17, 2009, 4:07 PM EDT (20:07 UTC)
Expired: Jun 17, 2009, 4:30 PM EDT
In force: 23 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Marion County, KY, Nelson County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 64 km from the middle of the area, began a volume at 20:08 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 17, 12:54 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.1 hours before the alert went out and 210 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: 2932 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.2

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 17, 3:35 PM EDT, 32 minutes earlier.

Area forecast discussion, Jun 17, 3:35 PM EDT, 32 minutes before

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Hazardous weather outlook, Jun 17, 4:00 PM EDT, 7 minutes before

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In the hours before

Special weather statement, Jun 17, 1:49 PM EDT, 2 hours 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
149 PM EDT WED JUN 17 2009

KYZ026-061-062-071-171815-
BUTLER-EDMONSON-OHIO-WARREN-
1249 PM CDT WED JUN 17 2009

...STRONG THUNDERSTORMS MOVING INTO SOUTH CENTRAL KENTUCKY...

AT 1247 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A CLUSTER OF STRONG THUNDERSTORMS ABOUT 25 MILES EAST OF CENTRAL
CITY...AND MOVING SOUTHEAST AT 35 MPH.

FREQUENT DEADLY LIGHTNING...HEAVY RAIN WITH RAINFALL AMOUNTS OF
AROUND ONE INCH PER HOUR REDUCING VISIBILITIES TO LESS THAN ONE
MILE...SMALL PEA OR MARBLE SIZE HAIL...AND GUSTY WINDS OF AROUND 35
TO 40 MPH...ARE EXPECTED WITH THESE STORMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...SEEK SHELTER INDOORS AND
STAY AWAY FROM WINDOWS. STAY TUNED TO NOAA ALL HAZARDS RADIO...
WEATHER.GOV/LOUISVILLE ON THE INTERNET...OR LOCAL MEDIA FOR LATER
UPDATES AND POSSIBLE WARNINGS.

&&

JA

Local storm report, Jun 17, 2:47 PM EDT, 1 hour 20 minutes before

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Special weather statement, Jun 17, 3:04 PM EDT, 1 hour 3 minutes before

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Local storm report, Jun 17, 3:18 PM EDT, 49 minutes before

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Special weather statement, Jun 17, 3:19 PM EDT, 48 minutes before

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Special weather statement, Jun 17, 3:25 PM EDT, 42 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 17, 1:55 PM EDT	Severe Thunderstorm Warning	LMK	Butler, Edmonson, Warren	35 min
Jun 17, 2:29 PM EDT	Severe Thunderstorm Warning	LMK	Butler, Edmonson, Warren	31 min
Jun 17, 3:13 PM EDT	Severe Thunderstorm Warning	LMK	Warren	32 min
Jun 17, 3:38 PM EDT	Severe Thunderstorm Warning	LMK	Bullitt, Nelson	37 min
Jun 17, 3:56 PM EDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Warren	37 min
Jun 17, 4:41 PM EDT	Severe Thunderstorm Warning	LMK	Hardin, Larue	19 min
Jun 17, 4:51 PM EDT	Areal Flood Advisory	LMK	Logan	114 min
Jun 17, 5:04 PM EDT	Severe Thunderstorm Warning	LMK	Nelson	26 min
Jun 17, 5:06 PM EDT	Areal Flood Advisory	LMK	Lincoln	84 min
Jun 17, 5:44 PM EDT	Flash Flood Warning	LMK	Lincoln	2 hr

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.