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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings591181%2195%17 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: tornado warnings140100%0
NWS Charleston, WV: tornado warnings7186%1100%9 min
NWS Cleveland, OH: tornado warnings13285%367%19 min
NWS Northern Indiana: tornado warnings12375%7100%22 min
NWS Wilmington, OH: tornado warnings48981%1593%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.

IssuedProductOfficeCountiesLasted
Mar 8, 5:51 PM EDTTornado WarningIWXDefiance, Paulding54 min
Mar 8, 6:23 PM EDTTornado WarningIWXDefiance, Fulton, Henry52 min
Mar 8, 6:55 PM EDTTornado WarningCLELucas, Wood50 min
Apr 5, 5:23 PM EDTTornado WarningILNPreble52 min
Apr 5, 6:11 PM EDTTornado WarningILNDarke, Miami, Montgomery, Preble49 min
May 1, 6:08 PM EDTTornado WarningILNFranklin, Licking22 min
May 27, 4:42 PM EDTTornado WarningILNAuglaize, Mercer33 min
May 30, 8:31 PM EDTTornado WarningILNClinton44 min
May 30, 8:33 PM EDTTornado WarningILNBrown, Clermont27 min
May 30, 8:54 PM EDTTornado WarningILNAdams, Brown, Clermont51 min
May 30, 8:58 PM EDTTornado WarningILNClinton, Fayette, Highland47 min
May 30, 9:01 PM EDTTornado WarningILNButler, Clermont, Hamilton, Warren29 min
May 30, 9:26 PM EDTTornado WarningILNBrown, Clermont, Clinton, Highland, Warren34 min
May 30, 9:32 PM EDTTornado WarningILNAdams, Brown, Scioto43 min
May 30, 9:32 PM EDTTornado WarningILNHighland, Pike, Ross43 min
May 30, 9:45 PM EDTTornado WarningILNRoss45 min
May 30, 9:57 PM EDTTornado WarningILNBrown, Highland33 min
Jun 2, 5:27 PM EDTTornado WarningILNMontgomery, Preble33 min
Jun 2, 5:36 PM EDTTornado WarningILNFairfield, Hocking, Pickaway24 min
Jun 14, 5:20 PM EDTTornado WarningILNAdams40 min
Jun 14, 5:37 PM EDTTornado WarningILNAdams, Scioto38 min
Jun 16, 9:58 PM EDTTornado WarningILNAdams, Scioto32 min
Jun 17, 3:22 PM EDTTornado WarningPBZCarroll, Tuscarawas23 min
Jun 17, 3:44 PM EDTTornado WarningPBZCarroll, Tuscarawas31 min
Jun 17, 5:36 PM EDTTornado WarningCLEHolmes, Wayne24 min
Jun 17, 5:58 PM EDTTornado WarningPBZTuscarawas47 min
Jun 17, 6:45 PM EDTTornado WarningPBZCarroll, Harrison, Tuscarawas45 min
Jun 17, 7:14 PM EDTTornado WarningCLEWayne46 min
Jun 17, 7:44 PM EDTTornado WarningCLEHolmes, Stark, Wayne46 min
Jun 17, 7:46 PM EDTTornado WarningPBZBelmont, Harrison44 min
Jun 17, 10:09 PM EDTTornado WarningPBZBelmont66 min
Jun 17, 10:32 PM EDTTornado WarningPBZBelmont, Monroe43 min
Jun 19, 6:30 PM EDTTornado WarningCLEHolmes27 min
Jun 19, 6:39 PM EDTTornado WarningCLEKnox33 min
Jun 19, 6:42 PM EDTTornado WarningILNLicking33 min
Jun 25, 3:43 PM EDTTornado WarningILNPickaway, Ross32 min
Jul 11, 3:48 PM EDTTornado WarningILNPike, Ross27 min
Jul 11, 4:03 PM EDTTornado WarningILNPike42 min
Jul 11, 4:22 PM EDTTornado WarningILNPike, Scioto23 min
Jul 11, 4:40 PM EDTTornado WarningILNScioto35 min
Jul 17, 4:23 PM EDTTornado WarningILNScioto16 min
Jul 22, 4:39 PM EDTTornado WarningILNScioto36 min
Aug 19, 6:06 PM EDTTornado WarningILNDarke39 min
Aug 19, 7:12 PM EDTTornado WarningILNAuglaize, Darke, Mercer, Shelby33 min
Aug 19, 7:18 PM EDTTornado WarningILNShelby42 min
Aug 19, 7:44 PM EDTTornado WarningILNDarke, Shelby46 min
Aug 19, 7:52 PM EDTTornado WarningILNChampaign, Logan, Shelby38 min
Aug 20, 4:11 PM EDTTornado WarningILNHocking, Pickaway, Ross34 min
Aug 20, 4:29 PM EDTTornado WarningILNFayette, Pickaway, Ross46 min
Aug 20, 4:38 PM EDTTornado WarningCLELorain18 min
Aug 20, 4:39 PM EDTTornado WarningILNHocking, Pickaway, Ross36 min
Aug 20, 4:51 PM EDTTornado WarningRLXAthens, Vinton39 min
Aug 20, 5:04 PM EDTTornado WarningILNHocking26 min
Aug 20, 5:24 PM EDTTornado WarningRLXAthens, Morgan51 min
Aug 20, 6:43 PM EDTTornado WarningCLEPortage30 min
Aug 20, 6:56 PM EDTTornado WarningCLEStark29 min
Aug 28, 3:20 PM EDTTornado WarningCLECuyahoga, Lorain40 min
Aug 28, 3:47 PM EDTTornado WarningCLECuyahoga, Lorain, Medina28 min
Oct 9, 4:14 PM EDTTornado WarningRLXMeigs31 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

9 more counties

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.