Alert archive / Kentucky / Tornado Warnings in 2011

Tornado Warning 15, NWS Wilmington, OH

April 20, 20114 counties in Kentucky

NWS Wilmington, OH issued this tornado warning at Apr 20, 2011, 1:41 AM EDT for 4 counties in Kentucky. It was in force for 34 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: Apr 20, 2011, 1:41 AM EDT (05:41 UTC)
Expired: Apr 20, 2011, 2:15 AM EDT
In force: 34 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon

Counties Bracken County, KY, Grant County, KY, Pendleton County, KY, Robertson County, KY

The radar

The Cincinnati radar (KILN), 100 km from the middle of the area, began a volume at 05:41 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

Time	Report	Where	Remark
Apr 20, 1:58 AM EDT	TSTM WND DMG	1 E Neave, KY	TREE DOWN ACROSS ROUTE 22.
Apr 20, 2:00 AM EDT	TSTM WND DMG	1 Nne Milford, KY	TREE DOWN ACROSS HIGHWAY 19.

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.

Issued	Product	Office	Lasted
Apr 19, 10:13 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 5.7 hours before the alert went out and 102 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: 1686 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 387 m²/s²
0-3 km storm-relative helicity: 474 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 18.7

Open this sounding in Storm Lab

The text

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

100 
WFUS51 KILN 200541
TORILN
KYC023-081-191-201-200615-
/O.NEW.KILN.TO.W.0015.110420T0541Z-110420T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
141 AM EDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN BRACKEN COUNTY IN NORTHERN KENTUCKY...
  EASTERN GRANT COUNTY IN NORTHERN KENTUCKY...
  PENDLETON COUNTY IN NORTHERN KENTUCKY...
  ROBERTSON COUNTY IN NORTHERN KENTUCKY...

* UNTIL 215 AM EDT.

* AT 140 AM EDT...RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
  MARCUS......MOVING EAST AT 50 MPH. IN ADDITION TO THE TORNADO...
  THIS STORM IS CAPABLE OF PRODUCING DESTRUCTIVE STRAIGHT LINE WINDS.

* LOCATIONS IMPACTED INCLUDE...
  FALMOUTH...
  BUTLER...

IN ADDITION...GARDNERSVILLE...GOFORTH...MORGAN...GENE SNYDER
AIRPORT...GREENWOOD...CATAWBA...MCKINNEYSBURG AND PEACH GROVE ARE
NEAR THE PATH OF THIS DANGEROUS THUNDERSTORM.

THIS INCLUDES THE FOLLOWING INTERSTATE...
I-75 BETWEEN MILE MARKERS 151 AND 165...

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.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT WEDNESDAY MORNING
FOR SOUTHEASTERN INDIANA AND NORTHEASTERN KENTUCKY AND SOUTHWESTERN
OHIO.

&&

LAT...LON 3876 8464 3885 8423 3881 8422 3880 8417
      3859 8404 3854 8421 3855 8422 3858 8421
      3856 8441 3853 8443 3853 8447 3851 8449
      3851 8452 3848 8457
TIME...MOT...LOC 0541Z 256DEG 44KT 3855 8446

$$

1 follow-up statement

216 
WWUS51 KILN 200551
SVSILN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
151 AM EDT WED APR 20 2011

KYC023-081-191-201-200615-
/O.CON.KILN.TO.W.0015.000000T0000Z-110420T0615Z/
PENDLETON KY-ROBERTSON KY-BRACKEN KY-GRANT KY-
151 AM EDT WED APR 20 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 215 AM EDT FOR
NORTHEASTERN GRANT...WESTERN BRACKEN...ROBERTSON AND PENDLETON
COUNTIES...

AT 149 AM EDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
GOFORTH...MOVING EAST AT 55 MPH. IN ADDITION TO THE TORNADO...THIS
STORM IS CAPABLE OF PRODUCING DESTRUCTIVE STRAIGHT LINE WINDS AND
VERY HEAVY RAIN.

LOCATIONS IMPACTED INCLUDE...
FALMOUTH AND BUTLER.

IN ADDITION...CATAWBA...MCKINNEYSBURG...BROWNING CORNER...MOUNT
AUBURN...NEAVE...MILFORD...LENOXBURG AND SANTA FE ARE 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.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

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 3876 8457 3884 8423 3880 8422 3879 8417
      3859 8405 3854 8421 3855 8422 3857 8421
      3858 8421 3856 8441 3855 8442
TIME...MOT...LOC 0552Z 251DEG 50KT 3867 8436

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 12:34 AM EDT	Severe Thunderstorm Warning	ILN	Boone, Campbell, Kenton	41 min
Apr 20, 12:37 AM EDT	Severe Thunderstorm Warning	ILN	Boone, Campbell, Carroll, Gallatin, Grant, Kenton and 2 more	38 min
Apr 20, 12:52 AM EDT	Tornado Warning	ILN	Boone	23 min
Apr 20, 12:56 AM EDT	Tornado Warning	ILN	Boone, Campbell, Gallatin, Grant, Kenton, Pendleton	34 min
Apr 20, 1:04 AM EDT	Flash Flood Warning	ILN	Boone, Campbell, Kenton	6 hr
Apr 20, 1:10 AM EDT	Tornado Warning	ILN	Bracken, Campbell, Carroll, Gallatin, Grant, Kenton and 3 more	35 min
Apr 20, 1:11 AM EDT	Tornado Warning	ILN	Boone, Campbell, Kenton	34 min
Apr 20, 1:24 AM EDT	Tornado Warning	ILN	Boone, Campbell, Kenton	36 min
Apr 20, 1:37 AM EDT	Tornado Warning	ILN	Campbell, Kenton	38 min
Apr 20, 1:56 AM EDT	Severe Thunderstorm Warning	ILN	Bracken, Lewis, Mason, Pendleton, Robertson	49 min
Apr 20, 2:02 AM EDT	Tornado Warning	ILN	Bracken, Mason, Pendleton	28 min
Apr 20, 2:34 AM EDT	Severe Thunderstorm Warning	ILN	Lewis, Mason	41 min
Apr 20, 6:55 AM EDT	Areal Flood Advisory	ILN	Boone, Campbell, Kenton	3 hr

Nearby

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