Alert archive / Indiana / Tornado Warnings in 2011

Tornado Warning 7, NWS Wilmington, OH

April 20, 2011Franklin County, Indiana; Butler County, Ohio

NWS Wilmington, OH issued this tornado warning at Apr 20, 2011, 12:47 AM EDT for Franklin County, Indiana; Butler County, Ohio. It was in force for 28 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, 12:47 AM EDT (04:47 UTC)
Expired: Apr 20, 2011, 1:15 AM EDT
In force: 28 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon

Counties Franklin County, IN, Butler County, OH

The radar

The Cincinnati radar (KILN), 84 km from the middle of the area, began a volume at 04:50 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, 1:07 AM EDT	TSTM WND DMG	Cedar Grove, IN	TWO TREES DOWNED.
Apr 20, 1:24 AM EDT	HAIL 0.88	Hamilton, OH

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, 4.8 hours before the alert went out and 86 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.

578 
WFUS51 KILN 200447
TORILN
INC047-OHC017-200515-
/O.NEW.KILN.TO.W.0007.110420T0447Z-110420T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILMINGTON OH
1247 AM EDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* TORNADO WARNING FOR...
  FRANKLIN COUNTY IN SOUTHEAST INDIANA...
  BUTLER COUNTY IN SOUTHWEST OHIO...

* UNTIL 115 AM EDT.

* AT 1246 AM EDT...RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
  HAMBURG......MOVING EAST AT 85 MPH. IN ADDITION TO THE TORNADO...
  THIS STORM IS CAPABLE OF PRODUCING DESTRUCTIVE STRAIGHT LINE WINDS.

* LOCATIONS IMPACTED INCLUDE...
  BROOKVILLE...
  OXFORD...
  ROSS...
  HAMILTON...
  FAIRFIELD...
  SEVEN MILE...
  TRENTON...
  SOUTH MIDDLETOWN...
  MONROE...
  MIDDLETOWN...

IN ADDITION...PEPPERTOWN...METAMORA...BLOOMING GROVE...MOUNDS STATE
RECREATION AREA...CEDAR GROVE...NEW TRENTON...MOUNT CARMEL AND
ROCKDALE ARE NEAR THE PATH OF THIS DANGEROUS THUNDERSTORM.

THIS INCLUDES THE FOLLOWING INTERSTATE...
I-75 BETWEEN MILE MARKERS 19 AND 28 IN OHIO...

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.

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. 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 3947 8530 3959 8437 3955 8437 3954 8433
      3930 8436 3931 8507 3930 8530
TIME...MOT...LOC 0447Z 261DEG 75KT 3939 8522

$$

1 follow-up statement

152 
WWUS51 KILN 200500
SVSILN

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

INC047-OHC017-200515-
/O.CON.KILN.TO.W.0007.000000T0000Z-110420T0515Z/
FRANKLIN IN-BUTLER OH-
100 AM EDT WED APR 20 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 AM EDT FOR FRANKLIN
COUNTY IN SOUTHEAST INDIANA...AND BUTLER COUNTY IN SOUTHWEST OHIO...

AT 1259 AM EDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
MOUNT CARMEL...MOVING EAST AT 80 MPH. IN ADDITION TO THE TORNADO...
THIS STORM IS CAPABLE OF PRODUCING DESTRUCTIVE STRAIGHT LINE WINDS.

LOCATIONS IMPACTED INCLUDE...
OXFORD...ROSS...HAMILTON...FAIRFIELD...SEVEN MILE...SOUTH
MIDDLETOWN...MONROE...MIDDLETOWN AND TRENTON.

IN ADDITION...SCIPIO...MIXERVILLE...ALERT...OKEANA...REILY...ST.
CHARLES...LAYHIGH AND MCGONIGLE 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.

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. 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 3947 8530 3959 8437 3955 8437 3954 8433
      3930 8436 3931 8507 3930 8530
TIME...MOT...LOC 0500Z 261DEG 75KT 3943 8486

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 10:53 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Union, Wayne	67 min
Apr 19, 11:42 PM EDT	Flash Flood Warning	ILN	Fayette, Union, Wayne	6 hr
Apr 19, 11:56 PM EDT	Severe Thunderstorm Warning	ILN	Fayette, Union, Wayne	49 min
Apr 20, 12:34 AM EDT	Severe Thunderstorm Warning	ILN	Dearborn, Franklin, Ohio, Ripley, Switzerland	41 min
Apr 20, 12:37 AM EDT	Severe Thunderstorm Warning	ILN	Ohio, Ripley, Switzerland	38 min
Apr 20, 12:39 AM EDT	Severe Thunderstorm Warning	ILN	Fayette, Union, Wayne	51 min
Apr 20, 12:52 AM EDT	Tornado Warning	ILN	Dearborn, Ripley	23 min
Apr 20, 12:56 AM EDT	Tornado Warning	ILN	Ohio, Switzerland	34 min
Apr 20, 1:04 AM EDT	Flash Flood Warning	ILN	Dearborn, Franklin, Ripley	6 hr
Apr 20, 1:09 AM EDT	Tornado Warning	ILN	Franklin	36 min
Apr 20, 1:11 AM EDT	Tornado Warning	ILN	Dearborn, Ohio	34 min
Apr 20, 5:11 AM EDT	River Flood Warning	ILN	Fayette, Franklin	7 hr
Apr 20, 5:46 AM EDT	Areal Flood Advisory	ILN	Fayette, Union, Wayne	3 hr
Apr 20, 6:55 AM EDT	Areal Flood Advisory	ILN	Dearborn, Franklin, Ripley	3 hr
Apr 20, 3:46 PM EDT	River Flood Advisory	ILN	Dearborn, Franklin	11 hr
Apr 19, 11:49 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Champaign, Clark, Darke, Hardin, Logan and 4 more	41 min
Apr 19, 11:53 PM EDT	Tornado Warning	ILN	Auglaize, Mercer	37 min
Apr 19, 11:54 PM EDT	Areal Flood Advisory	ILN	Auglaize, Champaign, Clark, Darke, Hardin, Logan and 4 more	6 hr
Apr 20, 12:10 AM EDT	Tornado Warning	ILN	Auglaize, Hardin	35 min
Apr 20, 12:26 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Hardin, Logan, Miami, Shelby and 1 more	49 min
Apr 20, 12:46 AM EDT	Severe Thunderstorm Warning	ILN	Clark, Darke, Greene, Miami, Montgomery, Preble	44 min
Apr 20, 1:17 AM EDT	Severe Thunderstorm Warning	ILN	Butler, Champaign, Clark, Greene, Miami, Montgomery and 2 more	43 min
Apr 20, 1:24 AM EDT	Tornado Warning	ILN	Brown, Clermont, Hamilton	36 min
Apr 20, 1:37 AM EDT	Tornado Warning	ILN	Brown, Clermont, Hamilton	38 min
Apr 20, 1:40 AM EDT	Severe Thunderstorm Warning	ILN	Butler, Clermont, Clinton, Greene, Hamilton, Highland and 2 more	50 min
Apr 20, 1:43 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark, Delaware, Fayette, Franklin, Greene and 5 more	47 min
Apr 20, 1:49 AM EDT	Severe Thunderstorm Warning	ILN	Adams, Brown, Clermont, Clinton, Highland	41 min
Apr 20, 1:55 AM EDT	Severe Thunderstorm Warning	ILN	Clinton, Fayette, Franklin, Greene, Highland, Madison and 2 more	50 min
Apr 20, 1:56 AM EDT	Severe Thunderstorm Warning	ILN	Adams, Brown, Clermont	49 min
Apr 20, 2:00 AM EDT	Tornado Warning	ILN	Brown, Highland	30 min
Apr 20, 2:02 AM EDT	Tornado Warning	ILN	Brown, Clermont	28 min
Apr 20, 2:06 AM EDT	Severe Thunderstorm Warning	ILN	Delaware, Fairfield, Franklin, Licking, Madison, Pickaway and 1 more	39 min
Apr 20, 2:07 AM EDT	Areal Flood Advisory	ILN	Clinton, Highland, Warren	6 hr
Apr 20, 2:19 AM EDT	Severe Thunderstorm Warning	ILN	Adams, Fayette, Highland, Pike, Ross, Scioto	41 min
Apr 20, 2:23 AM EDT	Tornado Warning	ILN	Adams, Highland, Pike	37 min
Apr 20, 2:27 AM EDT	Severe Thunderstorm Warning	ILN	Adams	18 min
Apr 20, 2:28 AM EDT	Areal Flood Advisory	ILN	Delaware, Fayette, Franklin, Madison, Pickaway, Union	6 hr
Apr 20, 2:34 AM EDT	Severe Thunderstorm Warning	ILN	Adams, Scioto	41 min
Apr 20, 2:34 AM EDT	Tornado Warning	ILN	Fairfield, Licking	26 min
Apr 20, 2:38 AM EDT	Tornado Warning	ILN	Delaware, Franklin, Licking	23 min
Apr 20, 2:43 AM EDT	Severe Thunderstorm Warning	ILN	Fairfield, Hocking, Pickaway, Ross	47 min
Apr 20, 2:51 AM EDT	Severe Thunderstorm Warning	ILN	Pike, Ross, Scioto	39 min
Apr 20, 3:12 AM EDT	Severe Thunderstorm Warning	ILN	Scioto	20 min
Apr 20, 3:26 AM EDT	Severe Thunderstorm Warning	ILN	Hocking	26 min
Apr 20, 9:24 AM EDT	River Flood Warning	ILN	Butler, Montgomery, Warren	5 hr
Apr 20, 9:24 AM EDT	River Flood Warning	ILN	Butler	5 hr
Apr 20, 12:08 PM EDT	River Flood Warning	ILN	Clermont, Hamilton, Warren	7 hr
Apr 20, 2:24 PM EDT	River Flood Warning	ILN	Adams	3 hr

Nearby

Tornado Warnings in Indiana, 2011 Tornado Warnings in Ohio, 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.