Alert archive / Kentucky / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 55, NWS Louisville, KY

February 27, 2009Clark County, Madison County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Feb 27, 2009, 5:14 AM EST for Clark County, Madison County, Kentucky. It was in force for 46 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 27, 2009, 5:14 AM EST (10:14 UTC)
Expired: Feb 27, 2009, 6:00 AM EST
In force: 46 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon

Counties Clark County, KY, Madison County, KY

The radar

The Jackson,KY radar (KJKL), 84 km from the middle of the area, began a volume at 10:14 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, 10.2 hours before the alert went out and 285 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: 1251 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 443 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 27, 5:06 AM EST, 8 minutes earlier.

Area forecast discussion, Feb 27, 5:06 AM EST, 8 minutes before

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Hazardous weather outlook, Feb 27, 4:07 AM EST, 1 hour 7 minutes before

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In the hours before

Special weather statement, Feb 27, 3:34 AM EST, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
334 AM EST FRI FEB 27 2009

INZ090-092-KYZ024-025-027>035-038-045-046-053-054-061>064-071-270930-
BRECKINRIDGE-BULLITT-BUTLER-CLARK-EDMONSON-FRANKLIN-GRAYSON-GREEN-
HARDIN-HARRISON-HART-HENRY-JEFFERSON-LARUE-MARION-MEADE-NELSON-
OLDHAM-SHELBY-SPENCER-TRIMBLE-WARREN-WASHINGTON-
334 AM EST FRI FEB 27 2009

...LINE OF STRONG THUNDERSTORMS MOVING ACROSS CENTRAL KENTUCKY...

AT 331 AM EST /231 AM CST/...NATIONAL WEATHER SERVICE DOPPLER RADAR
WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE FROM 5 MILES WEST OF
CARROLLTON TO 8 MILES EAST OF HARDINSBURG TO 10 MILES SOUTHWEST OF
LEITCHFIELD TO 11 MILES SOUTHWEST OF MORGANTOWN...MOVING EAST AT 55
MPH.

FREQUENT DEADLY LIGHTNING...TORRENTIAL RAIN...AND STRONG GUSTY WINDS
TO 50 MPH ARE EXPECTED WITH THESE STORMS.

THESE STORMS WILL BE...
  NEAR MORGANTOWN BY 240 AM CST.
  NEAR SHEPHERDSVILLE BY 355 AM EST.
  NEAR ELIZABETHTOWN BY 400 AM EST.
  NEAR SHELBYVILLE BY 410 AM EST.

TORRENTIAL RAINFALL IS LIKELY. EXPECT PONDING OF WATER ON LOCAL
ROADWAYS. DRIVERS SHOULD SLOW DOWN IF ENCOUNTERING HEAVY RAINS.

STRONG WINDS CAN TOPPLE WEAKLY ROOTED TREES AND DOWN POWER LINES.
TAKE PRECAUTIONS NOW TO SECURE TRASH CANS...LAWN FURNITURE AND OTHER
LOOSE OUTDOOR OBJECTS. MOTORISTS IN HIGH PROFILE VEHICLES SHOULD USE
CAUTION.

13

Local storm report, Feb 27, 3:47 AM EST, 1 hour 27 minutes before

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Special weather statement, Feb 27, 4:28 AM EST, 46 minutes before

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Local storm report, Feb 27, 4:30 AM EST, 44 minutes before

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Local storm report, Feb 27, 4:37 AM EST, 37 minutes before

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Special weather statement, Feb 27, 5:03 AM EST, 11 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 27, 3:23 AM EST	Severe Thunderstorm Warning	LMK	Grayson, Ohio	37 min
Feb 27, 3:45 AM EST	Severe Thunderstorm Warning	LMK	Bullitt, Hardin, Henry, Jefferson, Larue, Meade and 4 more	45 min
Feb 27, 4:19 AM EST	Severe Thunderstorm Warning	LMK	Anderson, Franklin, Henry, Mercer, Nelson, Scott and 4 more	41 min
Feb 27, 4:36 AM EST	Severe Thunderstorm Warning	LMK	Harrison, Scott	39 min
Feb 27, 4:47 AM EST	Severe Thunderstorm Warning	LMK	Bourbon, Fayette, Jessamine, Scott	43 min
Feb 27, 5:04 AM EST	Severe Thunderstorm Warning	LMK	Adair, Allen, Barren, Metcalfe, Monroe, Simpson and 1 more	41 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.