Alert archive / Kentucky / Special Weather Statements in 2011

Special Weather Statement, NWS Louisville, KY

August 7, 20114 counties in Kentucky

NWS Louisville, KY issued this special weather statement at Aug 7, 2011, 4:58 AM EDT for 4 counties in Kentucky. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 7, 2011, 4:58 AM EDT (08:58 UTC)
Expired: Aug 7, 2011, 6:00 AM EDT
In force: 62 min
Issued by: NWS Louisville, KY

Counties Anderson County, KY, Fayette County, KY, Jessamine County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 117 km from the middle of the area, began a volume at 08:59 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 00:00Z, 9.0 hours before the alert went out and 175 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: 1031 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 7, 3:36 AM EDT, 1 hour 22 minutes earlier.

Area forecast discussion, Aug 7, 3:36 AM EDT, 1 hour 22 minutes before

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Hazardous weather outlook, Aug 7, 4:27 AM EDT, 31 minutes before

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In the hours before

Special weather statement, Aug 7, 3:02 AM EDT, 1 hour 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
302 AM EDT SUN AUG 7 2011

INZ076-077-083-084-089-090-070800-
CRAWFORD-DUBOIS-HARRISON-ORANGE-PERRY-WASHINGTON-
302 AM EDT SUN AUG 7 2011

...WIDESPREAD STRONG THUNDERSTORMS WITH DANGEROUS LIGHTNING...HEAVY
RAIN...AND 40 MPH WINDS EXPECTED ACROSS SOUTHWESTERN INDIANA THROUGH
4 AM EDT...

AT 253 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WINSLOW...AND MOVING EAST AT 40 MPH. THIS
STORM WILL BRING VERY HEAVY RAIN AND WIND GUSTS UP TO 45 MPH TO
DUBOIS COUNTY. OTHER STORMS ACROSS SOUTHWESTERN INDIANA WILL BRING
SCATTERED VERY HEAVY RAINFALL AND GUSTY WINDS TO PORTIONS OF
CRAWFORD...ORANGE AND WASHINGTON COUNTIES.

FREQUENT CLOUD TO GROUND LIGHTNING...VERY HEAVY RAIN WITH RAINFALL
RATES OF AROUND ONE INCH PER HOUR REDUCING VISIBILITIES TO LESS THAN
ONE MILE...AND GUSTY WINDS OF AROUND 35 TO 40 MPH...ARE EXPECTED
WITH THESE STORMS.

* THESE STORMS WILL ALSO IMPACT...
  PAOLI...
  JASPER...
  ENGLISH...
  IRELAND AND PORTERSVILLE...
  HAYSVILLE AND MALTERSVILLE...
  DUBOIS AND DUBOIS CROSSROADS...
  CUZCO AND ELLSWORTH...

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 3851 8708 3851 8698 3849 8695 3851 8694
      3850 8688 3853 8684 3853 8669 3869 8668
      3869 8632 3873 8631 3877 8628 3878 8617
      3877 8615 3824 8625 3821 8707
TIME...MOT...LOC 0659Z 263DEG 47KT 3842 8708

JSD

Special weather statement, Aug 7, 4:58 AM EDT, 0 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
Aug 7, 4:10 AM EDT	Areal Flood Advisory	LMK	Jefferson, Oldham	3 hr
Aug 7, 4:34 AM EDT	Areal Flood Advisory	LMK	Trimble	3 hr
Aug 7, 3:02 AM EDT	Special Weather Statement	LMK	Crawford, Dubois, Orange	58 min

Nearby

Special Weather Statements in Kentucky, 2011 Every special weather statement in 2011

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.