Alert archive / Kentucky / Tornado Warnings in 2011

Tornado Warning 116, NWS Louisville, KY

September 25, 2011Grayson County, Kentucky

NWS Louisville, KY issued this tornado warning at Sep 25, 2011, 10:03 PM CDT for Grayson County, Kentucky. It was in force for 27 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
Sep 25, 2011, 10:03 PM CDT (03:03 UTC)
Expired
Sep 25, 2011, 10:30 PM CDT
In force
27 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon

County Grayson County, KY

The radar

The Louisville radar (KLVX), 60 km from the middle of the area, began a volume at 03:06 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, 3.1 hours before the alert went out and 155 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, Nashville Metro, TN at 00:00Z on 2011-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1258 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2011-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 271 square meters per square second.19395878Sfc1 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
1258 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
1166 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
271 m²/s²
0-3 km storm-relative helicity
400 m²/s²
Significant tornado parameter
1.7
Supercell composite
8.0

Open this sounding in Storm Lab

The text

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

434 
WFUS53 KLMK 260303
TORLMK
KYC085-260330-
/O.NEW.KLMK.TO.W.0116.110926T0303Z-110926T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
1003 PM CDT SUN SEP 25 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  GRAYSON COUNTY IN SOUTH CENTRAL KENTUCKY...

* UNTIL 1030 PM CDT...

* AT 1001 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR SHREWSBURY...MOVING NORTHEAST AT 55 MPH.

* THIS TORNADIC STORM WILL ALSO IMPACT...
  LEITCHFIELD...
  GRAYSON SPRINGS AND PEONIA...
  WEST CLIFTY AND CLARKSON...
  BIG CLIFTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A VEHICLE OR OUTDOORS...MOVE TO
THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING
DEBRIS.

TO REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT...1...8 7 7...6 3 3...6 7 7 2...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3758 8623 3758 8621 3756 8619 3757 8617
      3756 8614 3746 8607 3732 8630 3733 8641
      3742 8651
TIME...MOT...LOC 0303Z 231DEG 48KT 3741 8635

$$

JSD
1 follow-up statement
699 
WWUS53 KLMK 260313
SVSLMK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1013 PM CDT SUN SEP 25 2011

KYC085-260330-
/O.CON.KLMK.TO.W.0116.000000T0000Z-110926T0330Z/
GRAYSON KY-
1013 PM CDT SUN SEP 25 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR EASTERN
GRAYSON COUNTY...

AT 1011 PM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE
A SEVERE THUNDERSTORM WITH STRONG ROTATION. THIS TORNADO WAS LOCATED
NEAR GRAYSON SPRINGS...MOVING NORTHEAST AT 55 MPH.

* THE TORNADO WILL ALSO IMPACT...
  LEITCHFIELD...
  BIG CLIFTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT...1...8 7 7...6 3 3...6 7 7 2...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3758 8623 3758 8621 3756 8619 3757 8617
      3756 8614 3746 8607 3737 8622 3751 8636
TIME...MOT...LOC 0313Z 231DEG 48KT 3749 8622

$$

JSD

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 25, 8:44 PM CDTSpecial Weather StatementLMKButler, Logan, Ohio46 min
Sep 25, 9:12 PM CDTTornado WarningLMKButler, Logan, Warren33 min
Sep 25, 9:12 PM CDTTornado WarningLMKButler, Grayson, Ohio18 min
Sep 25, 9:37 PM CDTTornado WarningLMKButler, Edmonson, Grayson23 min
Sep 25, 10:26 PM CDTTornado WarningLMKGrayson19 min
Sep 25, 11:54 PM CDTSpecial Weather StatementLMKBullitt, Jefferson, Oldham51 min
Sep 26, 12:02 AM CDTAreal Flood AdvisoryLMKJefferson, Oldham118 min
Sep 26, 12:02 AM CDTSevere Thunderstorm WarningLMKBullitt, Jefferson28 min
Sep 26, 12:36 AM CDTSpecial Weather StatementLMKJefferson, Meade24 min
Sep 26, 1:26 AM CDTFlash Flood WarningLMKJefferson, Meade, Oldham5 hr
Sep 26, 5:18 AM CDTTornado WarningLMKBoyle, Garrard, Jessamine, Mercer, Woodford27 min
Sep 26, 5:33 AM CDTTornado WarningLMKCasey, Lincoln27 min
Sep 26, 6:22 AM CDTSpecial Weather StatementLMKClark23 min
Sep 26, 6:24 AM CDTSpecial Weather StatementLMKGarrard21 min
Sep 26, 6:47 AM CDTSpecial Weather StatementLMKClark, Garrard, Lincoln, Madison43 min
Sep 26, 6:48 AM CDTSpecial Weather StatementLMKClark, Garrard, Lincoln, Madison42 min
Sep 26, 7:17 AM CDTTornado WarningLMKClark13 min
Sep 26, 7:28 AM CDTSpecial Weather StatementLMKClark, Madison32 min

Nearby

Tornado Warnings in Kentucky, 2011Every tornado warning in 2011Tornadoes 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.