Alert archive / Ohio / Shelby County
Weather alerts in Shelby County, Ohio, 2009
88 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Shelby County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 88
- Warnings
- 19
- Watches
- 20
- Advisories
- 26
- Busiest month
- January18 alerts
- Busiest day
- June 19, 20097 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 4 tornado warnings covering Shelby County in 2009 had a tornado report inside them.
Shelby County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 7 | 5 | 29% | 9 | 44% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wilmington, OH: tornado warnings | 48 | 9 | 81% | 15 | 93% | 16 min |
| NWS Wilmington, OH: severe thunderstorm warnings | 206 | 109 | 47% | 262 | 77% | 20 min |
| NWS Wilmington, OH: flash flood warnings | 25 | 18 | 28% | 49 | 82% | 67 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 | Lasted |
|---|---|---|---|
| Jan 4, 9:25 AM EST | Dense Fog Advisory | ILN | 95 min |
| Jan 5, 3:46 PM EST | Winter Weather Advisory | ILN | 38 hr |
| Jan 6, 5:53 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 8, 4:04 PM EST | Winter Storm Watch | ILN | 23 hr |
| Jan 9, 2:50 PM EST | Winter Storm Warning | ILN | 24 hr |
| Jan 9, 2:50 PM EST | Winter Weather Advisory | ILN | 29 hr |
| Jan 10, 12:53 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 10, 6:33 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 12, 3:40 PM EST | Winter Weather Advisory | ILN | 18 hr |
| Jan 13, 3:53 AM EST | Winter Storm Watch | ILN | 23 hr |
| Jan 14, 3:07 AM EST | Wind Chill Advisory | ILN | 3 days |
| Jan 14, 3:07 AM EST | Winter Storm Warning | ILN | 21 hr |
| Jan 15, 3:52 AM EST | Wind Chill Warning | ILN | 30 hr |
| Jan 15, 3:52 AM EST | Wind Chill Advisory | ILN | 54 hr |
| Jan 26, 5:01 PM EST | Winter Storm Warning | ILN | 47 hr |
| Jan 26, 5:01 PM EST | Winter Weather Advisory | ILN | 22 hr |
| Jan 28, 12:31 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 28, 3:42 PM EST | Wind Chill Advisory | ILN | 12 hr |
| Feb 10, 3:34 AM EST | High Wind Watch | ILN | 12 hr |
| Feb 10, 8:42 AM EST | High Wind Watch | ILN | 46 hr |
| Feb 10, 4:02 PM EST | High Wind Warning | ILN | 36 hr |
| Feb 11, 5:40 PM EST | Severe Thunderstorm Warning | ILN | 50 min |
| Feb 11, 6:15 PM EST | Severe Thunderstorm Warning | ILN | 45 min |
| Feb 12, 3:53 AM EST | Wind Advisory | ILN | 14 hr |
| Feb 19, 4:00 PM EST | Winter Storm Watch | ILN | 24 hr |
| Feb 20, 3:56 PM EST | Winter Weather Advisory | ILN | 26 hr |
| Mar 8, 2:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Mar 8, 2:52 PM EDT | Tornado Watch | SPC | 5 hr |
| Mar 8, 3:27 PM EDT | Wind Advisory | ILN | 13 hr |
| Mar 11, 12:25 AM EDT | Severe Thunderstorm Warning | ILN | 65 min |
| Apr 2, 9:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Apr 27, 11:12 AM EDT | Red Flag Warning | ILN | 8 hr |
| May 1, 4:00 AM EDT | Areal Flood Advisory | ILN | 3 hr |
| May 7, 1:20 AM EDT | Dense Fog Advisory | ILN | 8 hr |
| May 14, 1:42 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 15, 7:39 PM EDT | Tornado Watch | SPC | 6 hr |
| May 15, 9:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 11:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 3:27 AM EDT | Frost Advisory | ILN | 29 hr |
| May 30, 7:29 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 1, 8:29 AM EDT | Severe Thunderstorm Warning | ILN | 46 min |
| Jun 1, 9:07 AM EDT | Severe Thunderstorm Warning | ILN | 38 min |
| Jun 1, 5:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 1, 6:25 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 1, 7:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 1, 9:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 19, 3:38 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 19, 4:16 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 19, 7:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 19, 2:37 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 19, 3:47 PM EDT | Flash Flood Watch | ILN | 12 hr |
| Jun 19, 6:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 19, 6:59 PM EDT | Tornado Watch | SPC | 8 hr |
| Jun 19, 9:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 25, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 24, 6:12 AM EDT | Dense Fog Advisory | ILN | 3 hr |
| Jul 25, 4:09 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 29, 6:11 AM EDT | Areal Flood Advisory | ILN | 3 hr |
| Aug 4, 5:37 AM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 11, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 6:11 PM EDT | Tornado Watch | SPC | 5 hr |
| Aug 19, 7:12 PM EDT | Tornado Warning | ILN | 33 min |
| Aug 19, 7:18 PM EDT | Tornado Warning | ILN | 42 min |
| Aug 19, 7:44 PM EDT | Tornado Warning | ILN | 46 min |
| Aug 19, 7:52 PM EDT | Tornado Warning | ILN | 38 min |
| Aug 19, 8:38 PM EDT | Areal Flood Advisory | ILN | 3 hr |
| Aug 20, 11:42 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 2:57 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 28, 5:01 PM EDT | Areal Flood Advisory | ILN | 3 hr |
| Sep 7, 7:27 PM EDT | Areal Flood Advisory | ILN | 2 hr |
| Sep 27, 3:54 PM EDT | Wind Advisory | ILN | 29 hr |
| Sep 28, 12:21 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 28, 1:52 AM EDT | Severe Thunderstorm Warning | ILN | 38 min |
| Sep 28, 2:13 AM EDT | Severe Thunderstorm Warning | ILN | 36 min |
| Sep 28, 2:25 AM EDT | Mesoscale Discussion | SPC | 65 min |
| Sep 30, 3:53 AM EDT | Frost Advisory | ILN | 29 hr |
| Oct 8, 3:20 PM EDT | Flood Watch | ILN | 26 hr |
| Oct 11, 3:55 PM EDT | Frost Advisory | ILN | 17 hr |
| Oct 16, 4:13 PM EDT | Freeze Watch | ILN | 23 hr |
| Oct 17, 3:22 PM EDT | Freeze Warning | ILN | 18 hr |
| Oct 23, 2:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Nov 24, 4:14 AM EST | Dense Fog Advisory | ILN | 5 hr |
| Dec 7, 3:42 PM EST | High Wind Watch | ILN | 57 hr |
| Dec 7, 5:38 PM EST | High Wind Watch | ILN | 22 hr |
| Dec 8, 3:39 PM EST | High Wind Warning | ILN | 29 hr |
| Dec 13, 3:53 AM EST | Winter Weather Advisory | ILN | 4 hr |
| Dec 27, 11:40 AM EST | Winter Weather Advisory | ILN | 12 hr |
| Dec 31, 2:26 PM EST | Winter Weather Advisory | ILN | 16 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 7 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 23 |
| Flooding | |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 8 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 4 |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe 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.