Alert archive / New Hampshire / Coos County
Weather alerts in Coos County, New Hampshire, 2012
121 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Coos County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 121
- Warnings
- 34
- Watches
- 16
- Advisories
- 35
- Busiest month
- July25 alerts
- Busiest day
- May 29, 201211 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Coos County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 9 | 31% | 1 | 100% | 22 min |
| Flash flood warnings | 7 | 1 | 86% | 2 | 0% |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 0 | 1 | 0% | |||
| NWS Gray, ME: severe thunderstorm warnings | 86 | 60 | 30% | 153 | 86% | 21 min |
| NWS Gray, ME: flash flood warnings | 15 | 1 | 93% | 9 | 11% | 29 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 10, 3:04 PM EST | Winter Storm Watch | GYX | 24 hr |
| Jan 11, 3:32 PM EST | Winter Storm Warning | GYX | 28 hr |
| Jan 13, 3:19 AM EST | Freezing Rain Advisory | GYX | 10 hr |
| Jan 13, 3:08 PM EST | Winter Weather Advisory | GYX | 9 hr |
| Jan 14, 1:29 PM EST | Wind Chill Warning | GYX | 19 hr |
| Jan 17, 3:09 AM EST | Winter Weather Advisory | GYX | 28 hr |
| Jan 17, 3:15 PM EST | Wind Advisory | GYX | 21 hr |
| Jan 23, 3:42 AM EST | Winter Weather Advisory | GYX | 22 hr |
| Jan 26, 2:57 AM EST | Winter Storm Warning | GYX | 36 hr |
| Jan 26, 2:57 AM EST | Winter Weather Advisory | GYX | 35 hr |
| Jan 27, 4:21 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 30, 1:16 AM EST | Winter Weather Advisory | GYX | 5 hr |
| Jan 31, 2:03 AM EST | Winter Weather Advisory | GYX | 36 hr |
| Feb 12, 3:01 AM EST | Wind Chill Advisory | GYX | 24 hr |
| Feb 23, 3:15 PM EST | Winter Weather Advisory | GYX | 39 hr |
| Feb 24, 3:46 AM EST | Winter Storm Warning | GYX | 27 hr |
| Feb 25, 6:40 AM EST | Winter Weather Advisory | GYX | 15 hr |
| Feb 28, 3:56 PM EST | Winter Storm Watch | GYX | 23 hr |
| Feb 29, 4:29 AM EST | Winter Storm Warning | GYX | 41 hr |
| Feb 29, 4:29 AM EST | Winter Weather Advisory | GYX | 11 hr |
| Mar 2, 2:26 PM EST | Winter Weather Advisory | GYX | 20 hr |
| Mar 16, 1:13 AM EDT | Freezing Rain Advisory | GYX | 14 hr |
| May 16, 1:18 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 16, 6:33 PM EDT | Special Weather Statement | GYX | 42 min |
| May 16, 6:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 29, 2:24 AM EDT | Areal Flood Advisory | GYX | 2 hr |
| May 29, 4:35 AM EDT | Special Weather Statement | GYX | 40 min |
| May 29, 5:56 AM EDT | Special Weather Statement | GYX | 49 min |
| May 29, 6:43 AM EDT | Flash Flood Watch | GYX | 17 hr |
| May 29, 6:46 AM EDT | Special Weather Statement | GYX | 44 min |
| May 29, 9:47 AM EDT | Flash Flood Warning | GYX | 3 hr |
| May 29, 2:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 29, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 29, 4:29 PM EDT | Special Weather Statement | GYX | 61 min |
| May 29, 4:39 PM EDT | Flash Flood Warning | GYX | 6 hr |
| May 29, 4:51 PM EDT | Flash Flood Warning | GYX | 6 hr |
| Jun 1, 11:56 AM EDT | Flood Watch | GYX | 40 hr |
| Jun 2, 5:40 PM EDT | Wind Advisory | GYX | 4 hr |
| Jun 2, 8:34 PM EDT | Areal Flood Warning | GYX | 10 hr |
| Jun 4, 7:49 AM EDT | Areal Flood Warning | GYX | 8 hr |
| Jun 4, 3:41 PM EDT | Areal Flood Advisory | GYX | 8 hr |
| Jun 8, 1:00 PM EDT | Special Weather Statement | GYX | 45 min |
| Jun 8, 1:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 8, 1:42 PM EDT | Special Weather Statement | GYX | 48 min |
| Jun 8, 7:16 PM EDT | Special Weather Statement | GYX | 59 min |
| Jun 23, 11:42 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 23, 11:55 AM EDT | Special Weather Statement | GYX | 50 min |
| Jun 23, 12:01 PM EDT | Flash Flood Watch | GYX | 8 hr |
| Jun 23, 12:37 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jun 23, 12:42 PM EDT | Special Weather Statement | GYX | 48 min |
| Jun 23, 1:14 PM EDT | Flash Flood Warning | GYX | 4 hr |
| Jun 26, 8:42 AM EDT | Flash Flood Watch | GYX | 12 hr |
| Jun 26, 9:46 AM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jun 26, 3:29 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jun 29, 2:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 4, 2:59 PM EDT | Special Weather Statement | GYX | 61 min |
| Jul 4, 3:16 PM EDT | Special Weather Statement | GYX | 2 hr |
| Jul 4, 3:55 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jul 4, 4:08 PM EDT | Special Weather Statement | GYX | 52 min |
| Jul 4, 4:15 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Jul 4, 4:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 4, 4:54 PM EDT | Flash Flood Warning | GYX | 4 hr |
| Jul 4, 5:05 PM EDT | Special Weather Statement | GYX | 55 min |
| Jul 4, 5:17 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jul 4, 7:48 PM EDT | Special Weather Statement | GYX | 57 min |
| Jul 17, 12:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 17, 1:23 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 3:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 17, 5:21 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jul 17, 6:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jul 17, 11:49 PM EDT | Severe Thunderstorm Warning | GYX | 41 min |
| Jul 23, 6:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 23, 7:16 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 8:08 PM EDT | Severe Thunderstorm Warning | GYX | 52 min |
| Jul 23, 8:57 PM EDT | Severe Thunderstorm Warning | GYX | 33 min |
| Jul 23, 9:30 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Jul 23, 9:44 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| Jul 24, 1:10 AM EDT | Special Weather Statement | GYX | 50 min |
| Jul 24, 2:29 AM EDT | Mesoscale Discussion | SPC | 31 min |
| Jul 28, 5:33 PM EDT | Areal Flood Warning | GYX | 3 hr |
| Aug 9, 6:13 PM EDT | Severe Thunderstorm Warning | GYX | 34 min |
| Aug 9, 6:37 PM EDT | Special Weather Statement | GYX | 38 min |
| Aug 10, 12:20 PM EDT | Flash Flood Watch | GYX | 10 hr |
| Aug 10, 4:04 PM EDT | Areal Flood Advisory | GYX | 116 min |
| Aug 10, 6:18 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 31, 4:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Aug 31, 5:18 PM EDT | Severe Thunderstorm Warning | GYX | 27 min |
| Sep 7, 7:11 AM EDT | Dense Fog Advisory | GYX | 109 min |
| Sep 8, 3:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Sep 8, 4:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 8, 6:15 PM EDT | Severe Thunderstorm Warning | GYX | 60 min |
| Sep 8, 6:53 PM EDT | Severe Thunderstorm Warning | GYX | 52 min |
| Sep 8, 7:15 PM EDT | Severe Thunderstorm Warning | GYX | 60 min |
| Sep 8, 8:13 PM EDT | Severe Thunderstorm Warning | GYX | 62 min |
| Sep 10, 2:49 PM EDT | Frost Advisory | GYX | 16 hr |
| Sep 11, 6:37 PM EDT | Frost Advisory | GYX | 8 hr |
| Sep 15, 2:57 AM EDT | Frost Advisory | GYX | 27 hr |
| Sep 16, 2:37 PM EDT | Frost Advisory | GYX | 16 hr |
| Sep 18, 3:27 AM EDT | Wind Advisory | GYX | 24 hr |
| Sep 18, 11:58 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Sep 19, 3:40 AM EDT | Freeze Warning | GYX | 27 hr |
| Oct 28, 3:07 PM EDT | Flood Watch | GYX | 69 hr |
| Oct 28, 3:14 PM EDT | High Wind Warning | GYX | 36 hr |
| Oct 30, 12:32 AM EDT | Areal Flood Warning | GYX | 8 hr |
| Oct 30, 1:49 AM EDT | Flash Flood Warning | GYX | 5 hr |
| Oct 30, 5:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 30, 9:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Oct 30, 9:53 PM EDT | Special Weather Statement | GYX | 67 min |
| Oct 30, 10:20 PM EDT | Areal Flood Warning | GYX | 12 hr |
| Dec 1, 3:26 AM EST | Winter Weather Advisory | GYX | 34 hr |
| Dec 9, 3:38 PM EST | Winter Weather Advisory | GYX | 23 hr |
| Dec 15, 3:28 AM EST | Winter Storm Watch | GYX | 25 hr |
| Dec 16, 4:06 AM EST | Winter Storm Warning | GYX | 3 days |
| Dec 16, 4:06 AM EST | Winter Weather Advisory | GYX | 56 hr |
| Dec 17, 3:35 AM EST | Winter Storm Watch | GYX | 12 hr |
| Dec 20, 3:05 PM EST | Wind Advisory | GYX | 30 hr |
| Dec 25, 4:05 AM EST | Winter Storm Watch | GYX | 34 hr |
| Dec 25, 3:19 PM EST | Winter Storm Warning | GYX | 57 hr |
| Dec 26, 8:22 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 27, 3:52 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 29, 3:29 AM EST | Winter Weather Advisory | GYX | 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 archive20112013
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.