Alert archive / Ohio / Columbiana County
Weather alerts in Columbiana County, Ohio, 2011
197 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Columbiana County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 197
- Warnings
- 49
- Watches
- 42
- Advisories
- 20
- Busiest month
- July40 alerts
- Busiest day
- February 28, 20119 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Columbiana County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 30 | 24 | 20% | 25 | 92% | 24 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 9 | 1 | 89% | 1 | 100% | 8 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 231 | 161 | 30% | 428 | 83% | 22 min |
| NWS Pittsburgh, PA: flash flood warnings | 21 | 11 | 48% | 23 | 91% | 81 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 9, 2:36 PM EST | Winter Storm Watch | PBZ | 25 hr |
| Jan 10, 3:19 PM EST | Winter Weather Advisory | PBZ | 3 days |
| Jan 12, 3:31 PM EST | Special Weather Statement | PBZ | 119 min |
| Jan 17, 2:20 PM EST | Winter Weather Advisory | PBZ | 20 hr |
| Jan 19, 7:02 AM EST | Freezing Rain Advisory | PBZ | 3 hr |
| Jan 19, 2:40 PM EST | Winter Weather Advisory | PBZ | 37 hr |
| Jan 30, 3:30 PM EST | Winter Storm Watch | PBZ | 19 hr |
| Jan 31, 10:55 AM EST | Winter Storm Warning | PBZ | 41 hr |
| Feb 1, 12:12 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 3:07 PM EST | Wind Advisory | PBZ | 24 hr |
| Feb 2, 6:16 AM EST | Special Weather Statement | PBZ | 29 min |
| Feb 4, 3:46 PM EST | Winter Weather Advisory | PBZ | 30 hr |
| Feb 8, 3:33 PM EST | Wind Chill Advisory | PBZ | 18 hr |
| Feb 13, 2:39 PM EST | Wind Advisory | PBZ | 28 hr |
| Feb 21, 12:08 PM EST | Winter Storm Warning | PBZ | 18 hr |
| Feb 21, 12:08 PM EST | Winter Weather Advisory | PBZ | 16 hr |
| Feb 23, 10:29 AM EST | Flood Watch | PBZ | 50 hr |
| Feb 24, 2:26 AM EST | Winter Weather Advisory | PBZ | 4 hr |
| Feb 24, 2:48 PM EST | Winter Weather Advisory | PBZ | 24 hr |
| Feb 27, 2:59 AM EST | Flood Watch | PBZ | 36 hr |
| Feb 27, 9:04 PM EST | Special Weather Statement | PBZ | 56 min |
| Feb 27, 10:03 PM EST | Special Weather Statement | PBZ | 57 min |
| Feb 28, 3:18 AM EST | Special Weather Statement | PBZ | 57 min |
| Feb 28, 4:06 AM EST | Special Weather Statement | PBZ | 24 min |
| Feb 28, 5:17 AM EST | Areal Flood Warning | PBZ | 20 hr |
| Feb 28, 5:23 AM EST | Special Weather Statement | PBZ | 22 min |
| Feb 28, 5:31 AM EST | Mesoscale Discussion | SPC | 29 min |
| Feb 28, 5:44 AM EST | Special Weather Statement | PBZ | 61 min |
| Feb 28, 5:47 AM EST | Tornado Watch | SPC | 5 hr |
| Mar 4, 3:47 AM EST | Flood Watch | PBZ | 54 hr |
| Mar 4, 10:39 PM EST | River Flood Watch | PBZ | 41 hr |
| Mar 4, 10:39 PM EST | River Flood Watch | PBZ | 24 hr |
| Mar 4, 10:39 PM EST | River Flood Watch | PBZ | 41 hr |
| Mar 8, 2:21 PM EST | Flood Watch | PBZ | 52 hr |
| Mar 9, 2:41 PM EST | Winter Storm Watch | PBZ | 25 hr |
| Mar 9, 4:23 PM EST | River Flood Watch | PBZ | 19 hr |
| Mar 9, 4:23 PM EST | River Flood Watch | PBZ | 19 hr |
| Mar 9, 4:23 PM EST | River Flood Watch | PBZ | 19 hr |
| Mar 10, 9:28 AM EST | Areal Flood Warning | PBZ | 12 hr |
| Mar 10, 11:18 AM EST | River Flood Warning | PBZ | 44 hr |
| Mar 10, 11:18 AM EST | River Flood Warning | PBZ | 50 hr |
| Mar 10, 11:18 AM EST | River Flood Warning | PBZ | 44 hr |
| Mar 10, 3:51 PM EST | Winter Storm Warning | PBZ | 26 hr |
| Mar 10, 9:11 PM EST | Areal Flood Warning | PBZ | 40 hr |
| Mar 23, 1:13 PM EDT | Tornado Watch | SPC | 7 hr |
| Mar 23, 3:16 PM EDT | Severe Thunderstorm Warning | PBZ | 59 min |
| Mar 23, 3:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Mar 23, 4:09 PM EDT | Severe Thunderstorm Warning | PBZ | 66 min |
| Mar 23, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Mar 23, 4:42 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Apr 4, 10:02 AM EDT | Special Weather Statement | PBZ | 58 min |
| Apr 4, 1:41 PM EDT | Special Weather Statement | PBZ | 64 min |
| Apr 4, 4:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 4, 4:29 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Apr 4, 5:05 PM EDT | Special Weather Statement | PBZ | 40 min |
| Apr 16, 12:24 PM EDT | Areal Flood Warning | PBZ | 6 hr |
| Apr 16, 1:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Apr 16, 4:01 PM EDT | Wind Advisory | PBZ | 27 hr |
| Apr 20, 2:22 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 20, 3:20 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 20, 3:37 AM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Apr 20, 4:11 AM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Apr 21, 2:55 PM EDT | Flash Flood Watch | PBZ | 53 hr |
| Apr 25, 1:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 25, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 25, 4:10 PM EDT | Special Weather Statement | PBZ | 50 min |
| Apr 25, 4:44 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Apr 25, 4:54 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Apr 25, 5:46 PM EDT | Severe Thunderstorm Warning | PBZ | 29 min |
| Apr 25, 6:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Apr 27, 10:09 AM EDT | Flash Flood Watch | PBZ | 18 hr |
| Apr 27, 1:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 27, 2:47 PM EDT | Special Weather Statement | PBZ | 43 min |
| Apr 27, 3:18 PM EDT | Special Weather Statement | PBZ | 57 min |
| Apr 28, 3:19 AM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 28, 5:22 AM EDT | Wind Advisory | PBZ | 6 hr |
| Apr 28, 6:57 AM EDT | High Wind Warning | PBZ | 5 hr |
| May 4, 4:04 PM EDT | Frost Advisory | PBZ | 17 hr |
| May 12, 11:04 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 12, 5:28 PM EDT | Special Weather Statement | PBZ | 32 min |
| May 12, 6:52 PM EDT | Mesoscale Discussion | SPC | |
| May 12, 6:53 PM EDT | Areal Flood Warning | PBZ | 5 hr |
| May 13, 2:17 PM EDT | Special Weather Statement | PBZ | 58 min |
| May 13, 2:52 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| May 13, 3:52 PM EDT | Flood Watch | PBZ | 6 hr |
| May 13, 3:59 PM EDT | Areal Flood Warning | PBZ | 16 hr |
| May 13, 4:42 PM EDT | Special Weather Statement | PBZ | 63 min |
| May 14, 4:10 AM EDT | Flash Flood Watch | PBZ | 20 hr |
| May 14, 7:46 PM EDT | Special Weather Statement | PBZ | 59 min |
| May 18, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 18, 2:32 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| May 18, 3:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 23, 8:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 23, 8:31 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 23, 10:17 PM EDT | Special Weather Statement | PBZ | 58 min |
| May 25, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 25, 8:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 8:20 PM EDT | Special Weather Statement | PBZ | 55 min |
| May 25, 9:29 PM EDT | Special Weather Statement | PBZ | 31 min |
| May 25, 9:37 PM EDT | Special Weather Statement | PBZ | 23 min |
| May 26, 2:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| May 26, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 31, 4:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 4, 5:51 PM EDT | Mesoscale Discussion | SPC | 24 min |
| Jun 4, 6:13 PM EDT | Special Weather Statement | PBZ | 32 min |
| Jun 4, 6:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 4, 8:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 5:29 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 7, 6:47 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 7, 8:22 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 7, 8:43 AM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Jun 7, 9:24 AM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jun 9, 3:56 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 9, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 6:44 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 21, 9:45 PM EDT | Special Weather Statement | PBZ | 30 min |
| Jun 21, 10:29 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jun 23, 1:12 AM EDT | Special Weather Statement | PBZ | 33 min |
| Jun 23, 12:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 23, 1:12 PM EDT | Special Weather Statement | PBZ | 63 min |
| Jun 23, 2:48 PM EDT | Special Weather Statement | PBZ | 57 min |
| Jun 28, 1:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 2, 9:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 4, 5:13 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jul 4, 5:22 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Jul 11, 10:16 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 11, 10:55 AM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 11, 1:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 11, 2:38 PM EDT | Special Weather Statement | PBZ | 52 min |
| Jul 11, 2:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jul 11, 3:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 11, 3:46 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Jul 18, 1:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 18, 3:57 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 5:17 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Jul 18, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Jul 18, 5:59 PM EDT | Areal Flood Warning | PBZ | 4 hr |
| Jul 18, 8:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 19, 2:32 AM EDT | Special Weather Statement | PBZ | 43 min |
| Jul 19, 3:05 AM EDT | Special Weather Statement | PBZ | 40 min |
| Jul 19, 3:42 AM EDT | Special Weather Statement | PBZ | 33 min |
| Jul 20, 4:00 AM EDT | Excessive Heat Watch | PBZ | 8 hr |
| Jul 20, 11:32 AM EDT | Excessive Heat Warning | PBZ | 30 hr |
| Jul 21, 3:34 PM EDT | Heat Advisory | PBZ | 26 hr |
| Jul 22, 11:36 AM EDT | Excessive Heat Warning | PBZ | 6 hr |
| Jul 22, 3:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 22, 4:04 PM EDT | Special Weather Statement | PBZ | 56 min |
| Jul 22, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Jul 22, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 22, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Jul 22, 5:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 22, 5:37 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 22, 7:12 PM EDT | Special Weather Statement | PBZ | 33 min |
| Jul 22, 8:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 25, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 3:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 28, 3:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 28, 4:03 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 28, 5:28 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jul 28, 5:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jul 28, 7:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 29, 2:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 1, 1:06 PM EDT | Mesoscale Discussion | SPC | 24 min |
| Aug 1, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 1, 3:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 9, 6:56 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 9, 8:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 9, 9:24 PM EDT | Special Weather Statement | PBZ | 66 min |
| Aug 19, 6:54 AM EDT | Special Weather Statement | PBZ | 66 min |
| Aug 19, 4:27 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| Aug 19, 4:51 PM EDT | Special Weather Statement | PBZ | 24 min |
| Aug 19, 4:52 PM EDT | Flash Flood Watch | PBZ | 3 hr |
| Aug 19, 4:58 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Aug 19, 5:33 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 21, 3:52 AM EDT | Special Weather Statement | PBZ | 38 min |
| Aug 21, 1:33 PM EDT | Special Weather Statement | PBZ | 27 min |
| Aug 24, 11:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 25, 12:42 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 25, 1:30 AM EDT | Severe Thunderstorm Warning | PBZ | 60 min |
| Aug 25, 2:31 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 25, 2:33 AM EDT | Special Weather Statement | PBZ | 57 min |
| Sep 23, 9:57 PM EDT | Dense Fog Advisory | PBZ | 11 hr |
| Sep 25, 5:27 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Sep 25, 6:14 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Sep 25, 6:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Sep 26, 2:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Oct 19, 7:12 PM EDT | Special Weather Statement | PBZ | 63 min |
| Oct 19, 8:13 PM EDT | Special Weather Statement | PBZ | 32 min |
| Oct 22, 4:12 AM EDT | Frost Advisory | PBZ | 29 hr |
| Oct 28, 6:48 AM EDT | Dense Fog Advisory | PBZ | 2 hr |
| Oct 29, 11:43 PM EDT | Dense Fog Advisory | PBZ | 11 hr |
| Nov 14, 3:29 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 14, 4:38 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 14, 8:08 PM EST | Severe Thunderstorm Warning | PBZ | 52 min |
| Nov 14, 8:41 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 22, 11:05 AM EST | Flood Watch | PBZ | 13 hr |
| Dec 27, 4:21 AM EST | Winter Weather Advisory | PBZ | 24 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.