Alert archive / Kentucky / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 421, NWS Louisville, KY

August 18, 2011Harrison County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Aug 18, 2011, 11:00 PM EDT for Harrison County, Kentucky. It was in force for 30 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 18, 2011, 11:00 PM EDT (03:00 UTC)
Expired
Aug 18, 2011, 11:30 PM EDT
In force
30 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Harrison County, KY

The radar

The Cincinnati radar (KILN), 121 km from the middle of the area, began a volume at 03:02 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, 3.0 hours before the alert went out and 123 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 00:00Z on 2011-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 963 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 00:00Z on 2011-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
963 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1570 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

120 
WUUS53 KLMK 190300
SVRLMK
KYC097-190330-
/O.NEW.KLMK.SV.W.0421.110819T0300Z-110819T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
1100 PM EDT THU AUG 18 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN HARRISON COUNTY IN EAST CENTRAL KENTUCKY...

* UNTIL 1130 PM EDT

* AT 1055 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM RUTLAND TO LEES LICK...MOVING
  EAST AT 15 MPH.

* SEVERE THUNDERSTORMS WILL ALSO IMPACT...
  CYNTHIANA...
  RUTLAND AND CONNERSVILLE...
  RENAKER...
  BROADWELL...
  COLEMANSVILLE AND BRECKINRIDGE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM WITH DAMAGING WINDS...DESTRUCTIVE 
HAIL...AND LIGHTNING. PEOPLE OUTSIDE SHOULD IMMEDIATELY MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3828 8443 3836 8447 3838 8446 3842 8449
      3842 8451 3849 8455 3851 8452 3852 8449
      3854 8447 3854 8444 3857 8441 3857 8436
      3833 8427
TIME...MOT...LOC 0259Z 256DEG 12KT 3849 8450 3835 8444
WIND...HAIL 60MPH 1.00IN

$$

13
1 follow-up statement
663 
WWUS53 KLMK 190317
SVSLMK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1117 PM EDT THU AUG 18 2011

KYC097-190330-
/O.CON.KLMK.SV.W.0421.000000T0000Z-110819T0330Z/
HARRISON KY-
1117 PM EDT THU AUG 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR CENTRAL HARRISON COUNTY...

AT 1113 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER 
SIZED HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE 
LOCATED ALONG A LINE FROM COLEMANSVILLE TO BRECKINRIDGE...MOVING 
NORTHEAST AT 15 MPH.

* SEVERE THUNDERSTORMS WILL ALSO IMPACT...
  CYNTHIANA...
  BOYD AND ROBINSON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN LOUISVILLE.

&&

LAT...LON 3836 8439 3838 8441 3841 8443 3843 8444
      3846 8444 3849 8444 3851 8445 3853 8446
      3854 8447 3854 8444 3857 8441 3857 8436
      3833 8427
TIME...MOT...LOC 0317Z 246DEG 13KT 3853 8442 3839 8436
WIND...HAIL 60MPH 1.00IN

$$

13

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:01 PM EDTSpecial Weather StatementLMKGrayson29 min
Aug 18, 8:07 PM EDTSpecial Weather StatementLMKBreckinridge23 min
Aug 18, 8:09 PM EDTAreal Flood AdvisoryLMKGrayson111 min
Aug 18, 8:15 PM EDTSpecial Weather StatementLMKHenry30 min
Aug 18, 8:34 PM EDTSpecial Weather StatementLMKOwen26 min
Aug 18, 8:42 PM EDTSevere Thunderstorm WarningLMKFranklin, Henry, Shelby33 min
Aug 18, 9:18 PM EDTSpecial Weather StatementLMKAnderson27 min
Aug 18, 9:26 PM EDTSpecial Weather StatementLMKHenry34 min
Aug 18, 9:31 PM EDTAreal Flood AdvisoryLMKHenry119 min
Aug 18, 10:38 PM EDTSpecial Weather StatementLMKTrimble22 min
Aug 18, 11:14 PM EDTFlash Flood WarningLMKHenry104 min
Aug 18, 11:16 PM EDTSpecial Weather StatementLMKBourbon29 min
Aug 18, 11:22 PM EDTSevere Thunderstorm WarningLMKHarrison23 min
Aug 18, 11:24 PM EDTSpecial Weather StatementLMKFranklin36 min
Aug 18, 11:25 PM EDTSevere Thunderstorm WarningLMKBourbon, Nicholas37 min
Aug 18, 11:50 PM EDTSpecial Weather StatementLMKNicholas25 min
Aug 19, 12:21 AM EDTSpecial Weather StatementLMKFranklin24 min
Aug 19, 1:00 AM EDTSpecial Weather StatementLMKMadison30 min
Aug 19, 1:40 PM EDTSpecial Weather StatementLMKGreen35 min
Aug 19, 4:20 PM EDTSpecial Weather StatementLMKMonroe25 min
Aug 19, 4:48 PM EDTSpecial Weather StatementLMKCumberland27 min
Aug 19, 5:06 PM EDTSevere Thunderstorm WarningLMKAdair, Clinton, Cumberland, Russell24 min
Aug 19, 5:28 PM EDTSevere Thunderstorm WarningLMKClinton, Cumberland, Russell32 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2011Every severe thunderstorm warning 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.