Alert archive / Ohio / Tornado Warnings in 2011

Tornado Warning 10, NWS Wilmington, OH

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

NWS Wilmington, OH issued this tornado warning at Apr 20, 2011, 1:09 AM EDT for Franklin County, Indiana; Butler County, Hamilton County, Warren County, Ohio. It was in force for 36 min. 7 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, 1:09 AM EDT (05:09 UTC)
Expired: Apr 20, 2011, 1:45 AM EDT
In force: 36 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon

Counties Franklin County, IN, Butler County, OH, Hamilton County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 49 km from the middle of the area, began a volume at 05:11 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, 1:24 AM EDT	HAIL 0.88	Hamilton, OH
Apr 20, 1:28 AM EDT	TSTM WND GST 59	Khao Hamilton Apt, OH	51 KT WIND GUST AT KHAO ASOS
Apr 20, 1:29 AM EDT	TSTM WND DMG	3 N Sharonville, OH	LARGE TREE LIMBS DOWN AND SHINGLES BLOWN OFF SOME ROOFS.
Apr 20, 1:37 AM EDT	TSTM WND GST 60	Mason, OH	ESTIMATED 60 MPH GUST FROM AMATEUR RADIO
Apr 20, 1:43 AM EDT	TSTM WND GST 65	South Lebanon, OH
Apr 20, 1:45 AM EDT	TSTM WND GST 55	Sharonville, OH
Apr 20, 1:46 AM EDT	HAIL 0.75	Monroe, 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, 5.2 hours before the alert went out and 51 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.

495 
WFUS51 KILN 200509
TORILN
INC047-OHC017-061-165-200545-
/O.NEW.KILN.TO.W.0010.110420T0509Z-110420T0545Z/

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

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN FRANKLIN COUNTY IN SOUTHEAST INDIANA...
  BUTLER COUNTY IN SOUTHWEST OHIO...
  NORTHERN HAMILTON COUNTY IN SOUTHWEST OHIO...
  WARREN COUNTY IN SOUTHWEST OHIO...

* UNTIL 145 AM EDT.

* AT 107 AM EDT...RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR REILY...
  ...MOVING EAST AT 65 MPH. IN ADDITION TO THE TORNADO...THIS STORM
  IS CAPABLE OF PRODUCING DESTRUCTIVE STRAIGHT LINE WINDS.

* LOCATIONS IMPACTED INCLUDE...
  OXFORD...
  ROSS...
  HAMILTON...
  FAIRFIELD...
  FOREST PARK...
  SEVEN MILE...
  SPRINGDALE...
  TRENTON...
  SHARONVILLE...
  SOUTH MIDDLETOWN...
  MIDDLETOWN...
  MONROE...

IN ADDITION...LAYHIGH...MCGONIGLE...MILLVILLE...PLEASANT RUN...
COLLINSVILLE...PLEASANT RUN FARM...NEW MIAMI AND JACKSONBURG ARE NEAR
THE PATH OF THIS DANGEROUS THUNDERSTORM.

THIS INCLUDES THE FOLLOWING INTERSTATES...
I-71 BETWEEN MILE MARKERS 19 AND 41 IN OHIO...
I-75 BETWEEN MILE MARKERS 17 AND 39 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.

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 3958 8408 3957 8401 3933 8400 3927 8400
      3929 8482 3931 8482 3931 8487 3952 8490
TIME...MOT...LOC 0509Z 258DEG 56KT 3945 8476

$$

1 follow-up statement

016 
WWUS51 KILN 200527
SVSILN

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

INC047-200538-
/O.CAN.KILN.TO.W.0010.000000T0000Z-110420T0545Z/
FRANKLIN IN-
127 AM EDT WED APR 20 2011

...THE TORNADO WARNING FOR EASTERN FRANKLIN COUNTY IN SOUTHEAST
INDIANA HAS BEEN CANCELLED...

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

LAT...LON 3953 8482 3958 8408 3957 8401 3927 8400
      3930 8481 3937 8482
TIME...MOT...LOC 0528Z 258DEG 56KT 3951 8438

$$

OHC017-061-165-200545-
/O.CON.KILN.TO.W.0010.000000T0000Z-110420T0545Z/
BUTLER OH-HAMILTON OH-WARREN OH-
127 AM EDT WED APR 20 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 AM EDT FOR WARREN...
NORTHERN HAMILTON AND BUTLER COUNTIES...

AT 124 AM EDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
TRENTON...MOVING EAST AT 65 MPH. IN ADDITION TO THE TORNADO...THIS
STORM IS CAPABLE OF PRODUCING DESTRUCTIVE STRAIGHT LINE WINDS.

LOCATIONS IMPACTED INCLUDE...
MASON...FRANKLIN...LEBANON...SPRINGBORO...MORROW AND WAYNESVILLE.

IN ADDITION...LANDEN...LOVELAND PARK...STATE ROUTE 63 AT STATE ROUTE
741...HAGEMAN...KINGS MILLS...MAINEVILLE...MURDOCK AND SOUTH LEBANON
ARE NEAR THE PATH OF THIS STORM.

THIS INCLUDES THE FOLLOWING INTERSTATES...
I-71 BETWEEN MILE MARKERS 20 AND 41...
I-75 BETWEEN MILE MARKERS 17 AND 39...

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 3953 8482 3958 8408 3957 8401 3927 8400
      3930 8481 3937 8482
TIME...MOT...LOC 0528Z 258DEG 56KT 3951 8438

$$

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, 12:47 AM EDT	Tornado Warning	ILN	Franklin	28 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, 1:11 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 Ohio, 2011 Tornado Warnings in Indiana, 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.