Alert archive / Kentucky / Tornado Warnings in 2011

Tornado Warning 41, NWS Wilmington, OH

May 23, 2011Boone County, Kenton County, Kentucky; Ohio County, Switzerland County, Indiana

NWS Wilmington, OH issued this tornado warning at May 23, 2011, 6:57 PM EDT for Boone County, Kenton County, Kentucky; Ohio County, Switzerland County, Indiana. It was in force for 33 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 23, 2011, 6:57 PM EDT (22:57 UTC)
Expired
May 23, 2011, 7:30 PM EDT
In force
33 min
Issued by
NWS Wilmington, OH
Area
Storm-based polygon

Counties Ohio County, IN, Switzerland County, IN, Boone County, KY, Kenton County, KY

The radar

The Cincinnati radar (KILN), 94 km from the middle of the area, began a volume at 22:59 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.

What was reported inside it

TimeReportWhereRemark
May 23, 7:20 PM EDTTSTM WND DMGBurlington, KYTREES DOWN.
May 23, 7:20 PM EDTNON-TSTM WND DMGBurlington, KYTREES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 23, 4:28 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.0 hours before the alert went out and 96 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 2011-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 170 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, Cncnati-Daytn, OH at 12:00Z on 2011-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 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
170 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
776 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
246 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

167 
WFUS51 KILN 232257 RRA
TORILN
INC115-155-KYC015-117-232330-
/O.NEW.KILN.TO.W.0041.110523T2257Z-110523T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
657 PM EDT MON MAY 23 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* TORNADO WARNING FOR...
  BOONE COUNTY IN NORTHERN KENTUCKY...
  KENTON COUNTY IN NORTHERN KENTUCKY...
  OHIO COUNTY IN SOUTHEAST INDIANA...
  SWITZERLAND COUNTY IN SOUTHEAST INDIANA...

* UNTIL 730 PM EDT.

* AT 655 PM EDT...RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR NORTH
  LANDING......MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BURLINGTON...
  UNION...
  OAKBROOK...
  WALTON...
  FLORENCE...
  ELSMERE...

IN ADDITION...RABBIT HASH...BELLEVIEW...WATERLOO...BIG BONE...
BEAVERLICK...HUEYS CORNERS...RICHWOOD AND BANK LICK ARE NEAR THE PATH
OF THIS DANGEROUS THUNDERSTORM.

THIS INCLUDES THE FOLLOWING INTERSTATE...
I-75 BETWEEN MILE MARKERS 173 AND 184 IN KENTUCKY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

PLEASE REPORT TORNADOES...FUNNEL CLOUDS...STRONG WINDS OR HAIL TO THE
NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...877-633-6772...WHEN
YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TUESDAY MORNING FOR SOUTHEASTERN INDIANA AND NORTHEASTERN KENTUCKY
AND SOUTHWESTERN OHIO.

&&

LAT...LON 3906 8461 3886 8457 3886 8494 3895 8495
TIME...MOT...LOC 2257Z 254DEG 44KT 3892 8486

$$
2 follow-up statements
741 
WWUS51 KILN 232307 RRA
SVSILN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
707 PM EDT MON MAY 23 2011

INC115-155-KYC015-117-232330-
/O.CON.KILN.TO.W.0041.000000T0000Z-110523T2330Z/
SWITZERLAND IN-OHIO IN-KENTON KY-BOONE KY-
707 PM EDT MON MAY 23 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR BOONE...
KENTON...OHIO AND EXTREME EASTERN SWITZERLAND COUNTIES...

AT 703 PM EDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
BIG BONE...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
UNION...OAKBROOK...WALTON...FLORENCE AND ELSMERE.

IN ADDITION...RICHWOOD IS NEAR THE PATH OF THIS STORM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

PLEASE REPORT TORNADOES...FUNNEL CLOUDS...STRONG WINDS OR HAIL TO THE
NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...877-633-6772...WHEN
YOU CAN DO SO SAFELY.

&&

LAT...LON 3886 8457 3886 8488 3898 8486 3906 8461
TIME...MOT...LOC 2307Z 254DEG 44KT 3893 8469

$$
730 
WWUS51 KILN 232320
SVSILN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
720 PM EDT MON MAY 23 2011

INC115-155-KYC015-117-232330-
/O.EXP.KILN.TO.W.0041.000000T0000Z-110523T2330Z/
SWITZERLAND IN-OHIO IN-KENTON KY-BOONE KY-
720 PM EDT MON MAY 23 2011

...THE TORNADO WARNING FOR BOONE...KENTON...OHIO AND EXTREME EASTERN
SWITZERLAND COUNTIES WILL EXPIRE AT 730 PM EDT...

THE STORM NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO. 
HOWEVER...GUSTY WINDS ARE STILL POSSIBLE WITH THIS STORM.

PLEASE REPORT PREVIOUS TORNADOES...WIND DAMAGE OR HAIL TO THE
NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...877-633-6772.

LAT...LON 3886 8457 3886 8488 3898 8486 3906 8461
TIME...MOT...LOC 2320Z 254DEG 44KT 3897 8449

$$

HATZOS

The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 23, 2:37 AM EDTSpecial Weather StatementILNBoone, Gallatin53 min
May 23, 5:12 AM EDTSevere Thunderstorm WarningILNCarroll, Gallatin, Grant, Owen, Pendleton63 min
May 23, 6:12 AM EDTSpecial Weather StatementILNBracken, Lewis, Mason, Robertson63 min
May 23, 6:29 PM EDTSevere Thunderstorm WarningILNBoone, Carroll, Gallatin, Grant, Owen61 min
May 23, 7:11 PM EDTSevere Thunderstorm WarningILNBoone, Bracken, Campbell, Grant, Kenton, Owen and 1 more49 min
May 23, 7:11 PM EDTTornado WarningILNGallatin, Grant, Kenton, Pendleton34 min
May 23, 7:35 PM EDTSevere Thunderstorm WarningILNBracken, Mason, Robertson40 min
May 23, 6:14 PM EDTSevere Thunderstorm WarningILNDearborn, Franklin, Ohio, Ripley, Switzerland61 min
May 23, 6:23 PM EDTTornado WarningILNRipley37 min
May 23, 6:30 PM EDTSevere Thunderstorm WarningILNFayette, Union, Wayne60 min
May 23, 6:34 PM EDTAreal Flood AdvisoryILNRipley86 min
May 23, 6:42 PM EDTTornado WarningILNDearborn, Franklin33 min

Nearby

Tornado Warnings in Kentucky, 2011Tornado Warnings in Indiana, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.