Alert archive / Ohio / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 346
The Storm Prediction Center issued this severe thunderstorm watch at May 23, 2011, 4:28 PM EDT for 18 counties in Indiana; 36 counties in Kentucky; 50 counties in Ohio. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 23, 2011, 4:28 PM EDT (20:28 UTC)
- Expired
- May 23, 2011, 10:42 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 104 counties
Clark County, IN, Crawford County, IN, Dearborn County, IN, Dubois County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Harrison County, IN, Jefferson County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Ripley County, IN, Scott County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Wayne County, IN, Anderson County, KY, Boone County, KY, Bourbon County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Campbell County, KY, Carroll County, KY, Clark County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Meade County, KY, Mercer County, KY, Nelson County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Washington County, KY, Woodford County, KY, Adams County, OH, Ashland County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Highland County, OH, Hocking County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Scioto County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Warren County, OH, Wood County, OH, Wyandot County, OH
The radar
The Cincinnati radar (KILN), 72 km from the middle of the area, began a volume at 20:31 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
51 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 4:36 PM EDT | Severe Thunderstorm Warning | CLE | Wood | 39 min |
| May 23, 4:43 PM EDT | Severe Thunderstorm Warning | LMK | Dubois | 32 min |
| May 23, 5:03 PM EDT | Severe Thunderstorm Warning | CLE | Ottawa, Sandusky | 42 min |
| May 23, 5:07 PM EDT | Severe Thunderstorm Warning | LMK | Crawford, Dubois, Orange, Perry | 23 min |
| May 23, 5:20 PM EDT | Severe Thunderstorm Warning | CLE | Lucas | 11 min |
| May 23, 5:28 PM EDT | Severe Thunderstorm Warning | LMK | Crawford, Harrison, Orange, Washington | 32 min |
| May 23, 5:43 PM EDT | Severe Thunderstorm Warning | CLE | Erie, Huron | 47 min |
| May 23, 5:51 PM EDT | Severe Thunderstorm Warning | LMK | Clark, Floyd, Harrison, Jefferson, Scott, Washington | 24 min |
| May 23, 6:05 PM EDT | Severe Thunderstorm Warning | LMK | Harrison | 25 min |
| May 23, 6:11 PM EDT | Severe Thunderstorm Warning | LMK | Clark, Floyd, Jefferson | 34 min |
| May 23, 6:14 PM EDT | Severe Thunderstorm Warning | ILN | Dearborn, Franklin, Ohio, Ripley, Switzerland | 61 min |
| May 23, 6:22 PM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Mercer | 53 min |
| May 23, 6:23 PM EDT | Tornado Warning | ILN | Ripley | 37 min |
| May 23, 6:27 PM EDT | Severe Thunderstorm Warning | CLE | Lorain | 48 min |
| May 23, 6:29 PM EDT | Severe Thunderstorm Warning | ILN | Switzerland | 61 min |
| May 23, 6:30 PM EDT | Severe Thunderstorm Warning | ILN | Fayette, Union, Wayne | 60 min |
| May 23, 6:33 PM EDT | Severe Thunderstorm Warning | LMK | Bullitt, Henry, Jefferson, Oldham, Shelby, Spencer | 27 min |
| May 23, 6:42 PM EDT | Tornado Warning | ILN | Dearborn, Franklin | 33 min |
| May 23, 6:49 PM EDT | Severe Thunderstorm Warning | CLE | Cuyahoga, Lorain | 56 min |
| May 23, 6:52 PM EDT | Severe Thunderstorm Warning | ILN | Butler, Clermont, Hamilton, Warren | 53 min |
| May 23, 6:57 PM EDT | Tornado Warning | ILN | Ohio, Switzerland | 33 min |
| May 23, 6:57 PM EDT | Tornado Warning | ILN | Butler, Hamilton | 30 min |
| May 23, 6:58 PM EDT | Tornado Warning | CLE | Cuyahoga, Lorain, Medina | 32 min |
| May 23, 7:02 PM EDT | Severe Thunderstorm Warning | LMK | Franklin, Henry, Scott, Shelby | 28 min |
| May 23, 7:08 PM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Champaign, Darke, Hardin, Logan, Mercer and 1 more | 67 min |
| May 23, 7:11 PM EDT | Severe Thunderstorm Warning | ILN | Boone, Bracken, Campbell, Grant, Kenton, Owen and 1 more | 49 min |
| May 23, 7:11 PM EDT | Tornado Warning | ILN | Gallatin, Grant, Kenton, Pendleton | 34 min |
| May 23, 7:16 PM EDT | Severe Thunderstorm Warning | ILN | Butler, Champaign, Clark, Darke, Greene, Miami and 4 more | 59 min |
| May 23, 7:16 PM EDT | Tornado Warning | ILN | Butler, Clermont, Hamilton, Warren | 32 min |
| May 23, 7:27 PM EDT | Tornado Warning | CLE | Cuyahoga, Summit | 33 min |
| May 23, 7:35 PM EDT | Severe Thunderstorm Warning | ILN | Bracken, Mason, Robertson | 40 min |
| May 23, 7:36 PM EDT | Tornado Warning | ILN | Darke, Miami | 39 min |
| May 23, 7:39 PM EDT | Severe Thunderstorm Warning | CLE | Hancock | 55 min |
| May 23, 7:40 PM EDT | Tornado Warning | ILN | Miami, Shelby | 35 min |
| May 23, 7:49 PM EDT | Severe Thunderstorm Warning | LMK | Harrison, Nicholas | 26 min |
| May 23, 7:56 PM EDT | Tornado Warning | ILN | Champaign, Clark, Greene | 34 min |
| May 23, 8:02 PM EDT | Severe Thunderstorm Warning | ILN | Delaware, Hardin, Logan, Union | 58 min |
| May 23, 8:02 PM EDT | Tornado Warning | ILN | Champaign, Clark, Logan | 32 min |
| May 23, 8:05 PM EDT | Severe Thunderstorm Warning | LMK | Fayette, Scott, Woodford | 25 min |
| May 23, 8:07 PM EDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Delaware, Fayette, Franklin, Greene and 3 more | 53 min |
| May 23, 8:08 PM EDT | Severe Thunderstorm Warning | ILN | Lewis, Mason | 67 min |
| May 23, 8:14 PM EDT | Severe Thunderstorm Warning | CLE | Marion, Seneca, Wyandot | 61 min |
| May 23, 8:22 PM EDT | Severe Thunderstorm Warning | LMK | Fayette, Jessamine, Woodford | 23 min |
| May 23, 8:25 PM EDT | Tornado Warning | ILN | Madison, Union | 24 min |
| May 23, 8:37 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Marion, Morrow, Seneca | 36 min |
| May 23, 8:43 PM EDT | Severe Thunderstorm Warning | ILN | Delaware, Fairfield, Franklin, Hocking, Licking, Pickaway and 1 more | 62 min |
| May 23, 8:44 PM EDT | Flash Flood Warning | LMK | Anderson | 110 min |
| May 23, 8:58 PM EDT | Severe Thunderstorm Warning | CLE | Ashland, Huron, Knox, Morrow, Richland | 62 min |
| May 23, 9:03 PM EDT | Severe Thunderstorm Warning | ILN | Lewis | 27 min |
| May 23, 9:28 PM EDT | Severe Thunderstorm Warning | CLE | Huron, Lorain | 28 min |
| May 23, 9:46 PM EDT | Severe Thunderstorm Warning | CLE | Cuyahoga, Geauga | 38 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.5 hours before the alert went out and 72 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.
- 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
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 8:20 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Benton, Blackford, Boone, Carroll and 33 more | 115 min |
| May 22, 10:35 PM EDT | Mesoscale Discussion | SPC | Lake | 55 min |
| May 22, 10:59 PM EDT | Mesoscale Discussion | SPC | Allen, Carroll, Cass, DeKalb, Elkhart, Fulton and 14 more | 61 min |
| May 22, 11:24 PM EDT | Mesoscale Discussion | SPC | Vermillion, Vigo | 66 min |
| May 23, 4:20 AM EDT | Mesoscale Discussion | SPC | Clark, Floyd, Harrison, Jefferson, Ohio, Scott and 1 more | 85 min |
| May 23, 8:25 AM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Boone, Carroll, Cass and 36 more | 65 min |
| May 23, 11:55 AM EDT | Severe Thunderstorm Watch | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 7 hr |
| May 23, 12:35 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 13 more | 85 min |
| May 23, 1:37 PM EDT | Mesoscale Discussion | SPC | Clay, Daviess, Gibson, Greene, Knox, Pike and 6 more | 83 min |
| May 23, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | Bartholomew, Boone, Brown, Carroll, Clay, Clinton and 33 more | 5 hr |
| May 23, 2:15 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more | 8 hr |
| May 23, 3:52 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 42 more | 53 min |
| May 23, 4:58 PM EDT | Mesoscale Discussion | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 92 min |
| May 23, 6:20 PM EDT | Mesoscale Discussion | SPC | Clark, Crawford, Dearborn, Decatur, Fayette, Floyd and 15 more | 55 min |
| May 23, 6:40 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, DeKalb, Grant, Howard and 8 more | 65 min |
| May 23, 5:24 PM EDT | Mesoscale Discussion | SPC | Allen, Barren, Butler, Caldwell, Calloway, Christian and 20 more | 96 min |
| May 23, 5:57 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Barren, Butler, Caldwell, Calloway, Christian and 23 more | 4 hr |
| May 23, 7:20 PM EDT | Mesoscale Discussion | SPC | Bath, Boyd, Breathitt, Carter, Elliott, Estill and 19 more | 85 min |
Nearby
Severe Thunderstorm Watches in Ohio, 2011Severe Thunderstorm Watches in Kentucky, 2011Severe Thunderstorm Watches in Indiana, 2011Every severe thunderstorm watch 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.