Alert archive / Ohio / Guernsey County
Weather alerts in Guernsey County, Ohio, 2009
80 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Guernsey County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 80
- Warnings
- 20
- Watches
- 13
- Advisories
- 20
- Busiest month
- June26 alerts
- Busiest day
- February 11, 200910 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Guernsey County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 10 | 23% | 1 | 100% | 7 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 Pittsburgh, PA: tornado warnings | 14 | 0 | 100% | 0 | ||
| NWS Pittsburgh, PA: severe thunderstorm warnings | 115 | 66 | 43% | 119 | 78% | 25 min |
| NWS Pittsburgh, PA: flash flood warnings | 9 | 6 | 33% | 11 | 91% | 72 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 5, 3:50 PM EST | Winter Weather Advisory | PBZ | 36 hr |
| Jan 6, 5:53 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 6, 1:05 PM EST | Winter Weather Advisory | PBZ | 2 hr |
| Jan 8, 2:40 PM EST | Winter Storm Watch | PBZ | 22 hr |
| Jan 9, 12:32 PM EST | Winter Storm Warning | PBZ | 31 hr |
| Jan 9, 12:32 PM EST | Winter Weather Advisory | PBZ | 34 hr |
| Jan 10, 6:33 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 14, 3:46 AM EST | Winter Weather Advisory | PBZ | 38 hr |
| Jan 14, 2:36 PM EST | Wind Chill Advisory | PBZ | 69 hr |
| Jan 26, 12:35 PM EST | Winter Storm Watch | PBZ | 23 hr |
| Jan 27, 11:48 AM EST | Winter Storm Warning | PBZ | 31 hr |
| Jan 27, 7:25 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 28, 12:31 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 28, 7:40 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 10, 3:10 PM EST | High Wind Watch | PBZ | 20 hr |
| Feb 11, 3:46 AM EST | High Wind Warning | PBZ | 39 hr |
| Feb 11, 1:35 PM EST | Mesoscale Discussion | SPC | 85 min |
| Feb 11, 1:59 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 11, 4:34 PM EST | Mesoscale Discussion | SPC | 86 min |
| Feb 11, 5:32 PM EST | Mesoscale Discussion | SPC | 88 min |
| Feb 11, 5:51 PM EST | Severe Thunderstorm Warning | PBZ | 54 min |
| Feb 11, 6:23 PM EST | Severe Thunderstorm Warning | PBZ | 22 min |
| Feb 11, 6:33 PM EST | Severe Thunderstorm Warning | PBZ | 27 min |
| Feb 11, 6:44 PM EST | Severe Thunderstorm Warning | PBZ | 46 min |
| Feb 11, 6:54 PM EST | Severe Thunderstorm Warning | PBZ | 36 min |
| Feb 12, 4:15 AM EST | Wind Advisory | PBZ | 15 hr |
| Mar 27, 5:26 AM EDT | Dense Fog Advisory | PBZ | 6 hr |
| Apr 3, 11:45 AM EDT | Wind Advisory | PBZ | 16 hr |
| May 1, 6:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| May 9, 3:16 AM EDT | Wind Advisory | PBZ | 17 hr |
| May 17, 3:04 AM EDT | Freeze Warning | PBZ | 29 hr |
| May 18, 3:04 PM EDT | Frost Advisory | PBZ | 17 hr |
| May 24, 6:17 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 2, 3:18 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 2, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 2, 7:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 2, 9:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 17, 2:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 17, 3:48 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 17, 9:22 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Jun 17, 9:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 17, 9:56 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 19, 7:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 19, 11:53 AM EDT | Flash Flood Watch | PBZ | 23 hr |
| Jun 19, 5:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 19, 6:28 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 19, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Jun 19, 8:08 PM EDT | Severe Thunderstorm Warning | PBZ | 19 min |
| Jun 20, 12:46 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 20, 3:14 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 25, 1:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 25, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 25, 4:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 25, 6:17 PM EDT | Severe Thunderstorm Warning | PBZ | 58 min |
| Jun 25, 6:51 PM EDT | Severe Thunderstorm Warning | PBZ | 54 min |
| Jun 25, 7:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 25, 8:20 PM EDT | Severe Thunderstorm Warning | PBZ | 55 min |
| Jun 25, 8:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 25, 9:15 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 21, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 21, 3:26 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Jul 29, 3:01 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Jul 31, 3:39 AM EDT | Flood Watch | PBZ | 10 hr |
| Aug 18, 2:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 19, 9:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 20, 11:42 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 20, 6:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Sep 27, 3:06 PM EDT | Wind Advisory | PBZ | 28 hr |
| Sep 30, 3:27 PM EDT | Frost Advisory | PBZ | 18 hr |
| Oct 6, 8:33 PM EDT | Wind Advisory | PBZ | 19 hr |
| Oct 13, 3:24 AM EDT | Frost Advisory | PBZ | 30 hr |
| Oct 17, 6:09 PM EDT | Freeze Warning | PBZ | 14 hr |
| Oct 18, 3:03 AM EDT | Freeze Warning | PBZ | 30 hr |
| Dec 8, 2:42 PM EST | Wind Advisory | PBZ | 22 hr |
| Dec 9, 11:02 AM EST | Mesoscale Discussion | SPC | 88 min |
| Dec 9, 1:00 PM EST | High Wind Warning | PBZ | 8 hr |
| Dec 12, 2:48 PM EST | Winter Weather Advisory | PBZ | 22 hr |
| Dec 18, 11:46 AM EST | Winter Weather Advisory | PBZ | 36 hr |
| Dec 27, 3:49 PM EST | Winter Weather Advisory | PBZ | 43 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 | 13 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 27 |
| Flooding | |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
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.