Alert archive / Kentucky / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 193, NWS Louisville, KY

August 4, 2010Anderson County, Nelson County, Washington County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Aug 4, 2010, 4:04 PM EDT for Anderson County, Nelson County, Washington County, Kentucky. It was in force for 26 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
Aug 4, 2010, 4:04 PM EDT (20:04 UTC)
Expired
Aug 4, 2010, 4:30 PM EDT
In force
26 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Hail
0.5 in
Wind
60.0 mph

Counties Anderson County, KY, Nelson County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 66 km from the middle of the area, began a volume at 20:07 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.1 hours before the alert went out and 214 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2010-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2520 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2010-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2520 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
858 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
167 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.4

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 Aug 4, 3:01 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Aug 4, 3:01 PM EDT, 1 hour 3 minutes before
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Hazardous weather outlook, Aug 4, 3:43 PM EDT, 21 minutes before
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In the hours before

Special weather statement, Aug 4, 2:49 PM EDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
249 PM EDT WED AUG 4 2010

KYZ075-076-041930-
METCALFE-MONROE-
149 PM CDT WED AUG 4 2010

...STRONG THUNDERSTORMS WITH DANGEROUS LIGHTNING...HEAVY RAIN...SMALL
HAIL...AND STRONG WINDS...

AT 148 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST OF
TOMPKINSVILLE TO 13 MILES NORTHWEST OF RED BOILING SPRINGS...AND
MOVING NORTHEAST AT 15 MPH.

FREQUENT CLOUD TO GROUND LIGHTNING...HEAVY RAIN WITH RAINFALL RATES
OF AROUND ONE INCH PER HOUR REDUCING VISIBILITIES TO LESS THAN ONE
MILE...SMALL PEA OR DIME SIZE HAIL...AND STRONG GUSTY WINDS OF AROUND
45 TO 50 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.

&&

LAT...LON 3668 8596 3672 8598 3683 8580 3684 8577
      3685 8575 3686 8575 3693 8561 3685 8560
      3667 8578
TIME...MOT...LOC 1850Z 244DEG 14KT 3682 8577 3676 8584
          3671 8594

RS
Special weather statement, Aug 4, 2:54 PM EDT, 1 hour 10 minutes before
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Special weather statement, Aug 4, 3:38 PM EDT, 26 minutes before
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Special weather statement, Aug 4, 3:40 PM EDT, 24 minutes before
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Special weather statement, Aug 4, 3:55 PM EDT, 9 minutes before
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The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 4, 4:16 AM EDTExcessive Heat WarningLMKAllen, Barren, Breckinridge, Bullitt, Butler, Edmonson and 10 more17 hr
Aug 4, 2:49 PM EDTSpecial Weather StatementLMKMonroe41 min
Aug 4, 2:54 PM EDTSpecial Weather StatementLMKHarrison21 min
Aug 4, 3:48 PM EDTAreal Flood AdvisoryLMKAllen, Barren, Monroe2 hr
Aug 4, 3:55 PM EDTSpecial Weather StatementLMKNelson, Washington20 min
Aug 4, 4:47 PM EDTSpecial Weather StatementLMKWashington28 min
Aug 4, 5:18 PM EDTSpecial Weather StatementLMKButler27 min
Aug 4, 5:41 PM EDTSpecial Weather StatementLMKGrayson34 min
Aug 4, 6:44 PM EDTSpecial Weather StatementLMKNicholas31 min
Aug 4, 7:02 PM EDTSpecial Weather StatementLMKMonroe28 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2010Every severe thunderstorm warning in 2010

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.