Alert archive / Ohio / Tornado Warnings
Tornado Warnings in Ohio, 2009
59 tornado warnings in 2009. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Tornado Warnings
- 59
- Busiest month
- June19 tornado warnings
- Busiest day
- May 31, 200910 tornado warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
11 of 59 tornado warnings covering Ohio in 2009 had a tornado report inside them; 20 of 21 tornado reports fell inside a warning, on average 17 minutes after it went out.
Ohio, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 59 | 11 | 81% | 21 | 95% | 17 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 14 | 0 | 100% | 0 | ||
| NWS Charleston, WV: tornado warnings | 7 | 1 | 86% | 1 | 100% | 9 min |
| NWS Cleveland, OH: tornado warnings | 13 | 2 | 85% | 3 | 67% | 19 min |
| NWS Northern Indiana: tornado warnings | 12 | 3 | 75% | 7 | 100% | 22 min |
| NWS Wilmington, OH: tornado warnings | 48 | 9 | 81% | 15 | 93% | 16 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 5:51 PM EDT | Tornado Warning | IWX | Defiance, Paulding | 54 min |
| Mar 8, 6:23 PM EDT | Tornado Warning | IWX | Defiance, Fulton, Henry | 52 min |
| Mar 8, 6:55 PM EDT | Tornado Warning | CLE | Lucas, Wood | 50 min |
| Apr 5, 5:23 PM EDT | Tornado Warning | ILN | Preble | 52 min |
| Apr 5, 6:11 PM EDT | Tornado Warning | ILN | Darke, Miami, Montgomery, Preble | 49 min |
| May 1, 6:08 PM EDT | Tornado Warning | ILN | Franklin, Licking | 22 min |
| May 27, 4:42 PM EDT | Tornado Warning | ILN | Auglaize, Mercer | 33 min |
| May 30, 8:31 PM EDT | Tornado Warning | ILN | Clinton | 44 min |
| May 30, 8:33 PM EDT | Tornado Warning | ILN | Brown, Clermont | 27 min |
| May 30, 8:54 PM EDT | Tornado Warning | ILN | Adams, Brown, Clermont | 51 min |
| May 30, 8:58 PM EDT | Tornado Warning | ILN | Clinton, Fayette, Highland | 47 min |
| May 30, 9:01 PM EDT | Tornado Warning | ILN | Butler, Clermont, Hamilton, Warren | 29 min |
| May 30, 9:26 PM EDT | Tornado Warning | ILN | Brown, Clermont, Clinton, Highland, Warren | 34 min |
| May 30, 9:32 PM EDT | Tornado Warning | ILN | Adams, Brown, Scioto | 43 min |
| May 30, 9:32 PM EDT | Tornado Warning | ILN | Highland, Pike, Ross | 43 min |
| May 30, 9:45 PM EDT | Tornado Warning | ILN | Ross | 45 min |
| May 30, 9:57 PM EDT | Tornado Warning | ILN | Brown, Highland | 33 min |
| Jun 2, 5:27 PM EDT | Tornado Warning | ILN | Montgomery, Preble | 33 min |
| Jun 2, 5:36 PM EDT | Tornado Warning | ILN | Fairfield, Hocking, Pickaway | 24 min |
| Jun 14, 5:20 PM EDT | Tornado Warning | ILN | Adams | 40 min |
| Jun 14, 5:37 PM EDT | Tornado Warning | ILN | Adams, Scioto | 38 min |
| Jun 16, 9:58 PM EDT | Tornado Warning | ILN | Adams, Scioto | 32 min |
| Jun 17, 3:22 PM EDT | Tornado Warning | PBZ | Carroll, Tuscarawas | 23 min |
| Jun 17, 3:44 PM EDT | Tornado Warning | PBZ | Carroll, Tuscarawas | 31 min |
| Jun 17, 5:36 PM EDT | Tornado Warning | CLE | Holmes, Wayne | 24 min |
| Jun 17, 5:58 PM EDT | Tornado Warning | PBZ | Tuscarawas | 47 min |
| Jun 17, 6:45 PM EDT | Tornado Warning | PBZ | Carroll, Harrison, Tuscarawas | 45 min |
| Jun 17, 7:14 PM EDT | Tornado Warning | CLE | Wayne | 46 min |
| Jun 17, 7:44 PM EDT | Tornado Warning | CLE | Holmes, Stark, Wayne | 46 min |
| Jun 17, 7:46 PM EDT | Tornado Warning | PBZ | Belmont, Harrison | 44 min |
| Jun 17, 10:09 PM EDT | Tornado Warning | PBZ | Belmont | 66 min |
| Jun 17, 10:32 PM EDT | Tornado Warning | PBZ | Belmont, Monroe | 43 min |
| Jun 19, 6:30 PM EDT | Tornado Warning | CLE | Holmes | 27 min |
| Jun 19, 6:39 PM EDT | Tornado Warning | CLE | Knox | 33 min |
| Jun 19, 6:42 PM EDT | Tornado Warning | ILN | Licking | 33 min |
| Jun 25, 3:43 PM EDT | Tornado Warning | ILN | Pickaway, Ross | 32 min |
| Jul 11, 3:48 PM EDT | Tornado Warning | ILN | Pike, Ross | 27 min |
| Jul 11, 4:03 PM EDT | Tornado Warning | ILN | Pike | 42 min |
| Jul 11, 4:22 PM EDT | Tornado Warning | ILN | Pike, Scioto | 23 min |
| Jul 11, 4:40 PM EDT | Tornado Warning | ILN | Scioto | 35 min |
| Jul 17, 4:23 PM EDT | Tornado Warning | ILN | Scioto | 16 min |
| Jul 22, 4:39 PM EDT | Tornado Warning | ILN | Scioto | 36 min |
| Aug 19, 6:06 PM EDT | Tornado Warning | ILN | Darke | 39 min |
| Aug 19, 7:12 PM EDT | Tornado Warning | ILN | Auglaize, Darke, Mercer, Shelby | 33 min |
| Aug 19, 7:18 PM EDT | Tornado Warning | ILN | Shelby | 42 min |
| Aug 19, 7:44 PM EDT | Tornado Warning | ILN | Darke, Shelby | 46 min |
| Aug 19, 7:52 PM EDT | Tornado Warning | ILN | Champaign, Logan, Shelby | 38 min |
| Aug 20, 4:11 PM EDT | Tornado Warning | ILN | Hocking, Pickaway, Ross | 34 min |
| Aug 20, 4:29 PM EDT | Tornado Warning | ILN | Fayette, Pickaway, Ross | 46 min |
| Aug 20, 4:38 PM EDT | Tornado Warning | CLE | Lorain | 18 min |
| Aug 20, 4:39 PM EDT | Tornado Warning | ILN | Hocking, Pickaway, Ross | 36 min |
| Aug 20, 4:51 PM EDT | Tornado Warning | RLX | Athens, Vinton | 39 min |
| Aug 20, 5:04 PM EDT | Tornado Warning | ILN | Hocking | 26 min |
| Aug 20, 5:24 PM EDT | Tornado Warning | RLX | Athens, Morgan | 51 min |
| Aug 20, 6:43 PM EDT | Tornado Warning | CLE | Portage | 30 min |
| Aug 20, 6:56 PM EDT | Tornado Warning | CLE | Stark | 29 min |
| Aug 28, 3:20 PM EDT | Tornado Warning | CLE | Cuyahoga, Lorain | 40 min |
| Aug 28, 3:47 PM EDT | Tornado Warning | CLE | Cuyahoga, Lorain, Medina | 28 min |
| Oct 9, 4:14 PM EDT | Tornado Warning | RLX | Meigs | 31 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Scioto County7
- Ross County7
- Brown County5
- Adams County5
- Pickaway County5
- Darke County4
- Clermont County4
- Highland County4
- Pike County4
- Hocking County4
- Tuscarawas County4
- Shelby County4
- Preble County3
- Clinton County3
- Carroll County3
- Holmes County3
- Wayne County3
- Belmont County3
- Lorain County3
- Defiance County2
- Montgomery County2
- Licking County2
- Auglaize County2
- Mercer County2
- Fayette County2
- Warren County2
- Harrison County2
- Stark County2
- Athens County2
- Cuyahoga County2
- Paulding County1
- Fulton County1
- Henry County1
- Lucas County1
- Wood County1
- Miami County1
- Franklin County1
- Butler County1
- Hamilton County1
- Fairfield County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.