Alert archive / New Hampshire / Coos County
Weather alerts in Coos County, New Hampshire, 2011
187 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 187
- Warnings
- 64
- Watches
- 33
- Advisories
- 30
- Busiest month
- July26 alerts
- Busiest day
- May 27, 201114 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 1 tornado warnings covering Coos County in 2011 had a tornado report inside them.
Coos County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 31 | 28 | 10% | 30 | 87% | 16 min |
| Flash flood warnings | 4 | 4 | 0% | 5 | 80% | 131 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 5 | 2 | 60% | 2 | 100% | 11 min |
| NWS Gray, ME: severe thunderstorm warnings | 159 | 136 | 14% | 296 | 89% | 23 min |
| NWS Gray, ME: flash flood warnings | 11 | 5 | 55% | 32 | 81% | 157 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 11, 3:10 AM EST | Winter Storm Warning | GYX | 42 hr |
| Jan 11, 3:10 AM EST | Winter Weather Advisory | GYX | 30 hr |
| Jan 17, 3:40 AM EST | Winter Storm Watch | GYX | 11 hr |
| Jan 17, 3:08 PM EST | Winter Storm Warning | GYX | 35 hr |
| Jan 18, 12:37 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 20, 2:53 PM EST | Winter Weather Advisory | GYX | 23 hr |
| Jan 23, 3:08 PM EST | Wind Chill Warning | GYX | 22 hr |
| Jan 31, 2:48 PM EST | Winter Storm Watch | GYX | 13 hr |
| Feb 1, 3:58 AM EST | Winter Storm Warning | GYX | 41 hr |
| Feb 2, 2:57 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 2, 10:00 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 5, 3:37 AM EST | Winter Storm Warning | GYX | 26 hr |
| Feb 5, 4:45 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 5, 9:02 PM EST | Mesoscale Discussion | SPC | 118 min |
| Feb 7, 3:32 PM EST | Winter Weather Advisory | GYX | 19 hr |
| Feb 14, 3:04 PM EST | Wind Advisory | GYX | 19 hr |
| Feb 17, 3:00 PM EST | Winter Weather Advisory | GYX | 12 hr |
| Feb 23, 3:37 PM EST | Winter Storm Watch | GYX | 13 hr |
| Feb 24, 4:21 AM EST | Winter Storm Warning | GYX | 42 hr |
| Feb 27, 3:43 PM EST | Winter Storm Warning | GYX | 23 hr |
| Mar 2, 3:01 PM EST | Wind Chill Advisory | GYX | 19 hr |
| Mar 5, 3:30 PM EST | Winter Storm Watch | GYX | 12 hr |
| Mar 6, 3:39 AM EST | Winter Storm Warning | GYX | 36 hr |
| Mar 6, 7:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 7, 3:10 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Mar 10, 3:48 AM EST | Flood Watch | GYX | 57 hr |
| Mar 10, 3:59 AM EST | Winter Weather Advisory | GYX | 30 hr |
| Mar 11, 10:08 AM EST | Areal Flood Advisory | GYX | 3 hr |
| Mar 11, 12:22 PM EST | Areal Flood Advisory | GYX | 3 hr |
| Mar 17, 3:03 PM EDT | Wind Advisory | GYX | 29 hr |
| Mar 20, 3:26 PM EDT | Winter Storm Warning | GYX | 23 hr |
| Mar 20, 3:26 PM EDT | Winter Weather Advisory | GYX | 43 hr |
| Mar 30, 5:06 AM EDT | Winter Storm Watch | GYX | 23 hr |
| Mar 31, 3:44 AM EDT | Winter Storm Warning | GYX | 40 hr |
| Apr 1, 11:46 AM EDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 11, 3:30 AM EDT | Flood Watch | GYX | 64 hr |
| Apr 11, 8:12 AM EDT | Special Weather Statement | GYX | 93 min |
| Apr 11, 8:23 AM EDT | Severe Thunderstorm Warning | GYX | 52 min |
| Apr 11, 3:18 PM EDT | Special Weather Statement | GYX | 42 min |
| Apr 11, 7:53 PM EDT | River Flood Warning | GYX | 4 days |
| Apr 12, 3:47 PM EDT | Winter Weather Advisory | GYX | 24 hr |
| Apr 15, 3:11 PM EDT | Flood Watch | GYX | 53 hr |
| Apr 16, 3:40 AM EDT | Wind Advisory | GYX | 32 hr |
| Apr 19, 3:17 PM EDT | Winter Weather Advisory | GYX | 29 hr |
| Apr 27, 9:10 AM EDT | Areal Flood Warning | GYX | 12 hr |
| Apr 27, 1:09 PM EDT | River Flood Warning | GYX | 32 hr |
| Apr 27, 1:22 PM EDT | River Flood Warning | GYX | 4 days |
| Apr 27, 3:16 PM EDT | Flood Watch | GYX | 29 hr |
| Apr 28, 8:45 AM EDT | Special Weather Statement | GYX | 60 min |
| Apr 28, 11:10 AM EDT | River Flood Warning | GYX | 50 hr |
| May 4, 3:18 AM EDT | Flood Watch | GYX | 19 hr |
| May 14, 3:32 PM EDT | Flood Watch | GYX | 44 hr |
| May 26, 6:55 PM EDT | Severe Thunderstorm Warning | GYX | 35 min |
| May 26, 7:26 PM EDT | Severe Thunderstorm Warning | GYX | 49 min |
| May 26, 7:54 PM EDT | Special Weather Statement | GYX | 66 min |
| May 26, 8:02 PM EDT | Severe Thunderstorm Warning | GYX | 43 min |
| May 26, 8:36 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| May 26, 9:09 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| May 26, 9:29 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| May 26, 11:24 PM EDT | Flash Flood Warning | GYX | 6 hr |
| May 26, 11:29 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| May 27, 1:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 27, 1:39 PM EDT | River Flood Warning | GYX | 15 hr |
| May 27, 1:39 PM EDT | River Flood Warning | GYX | 38 hr |
| May 27, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 27, 5:40 PM EDT | Special Weather Statement | GYX | 50 min |
| May 27, 5:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 27, 6:40 PM EDT | Severe Thunderstorm Warning | GYX | 35 min |
| May 27, 6:55 PM EDT | Severe Thunderstorm Warning | GYX | 35 min |
| May 27, 8:14 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| May 27, 8:55 PM EDT | Areal Flood Warning | GYX | 4 hr |
| May 27, 8:56 PM EDT | Severe Thunderstorm Warning | GYX | 64 min |
| May 28, 4:06 AM EDT | Special Weather Statement | GYX | 54 min |
| May 28, 4:44 AM EDT | River Flood Warning | GYX | 5 days |
| May 30, 2:56 AM EDT | Flash Flood Warning | GYX | 3 hr |
| Jun 1, 7:25 AM EDT | Special Weather Statement | GYX | 35 min |
| Jun 1, 7:59 AM EDT | Special Weather Statement | GYX | 31 min |
| Jun 1, 8:07 AM EDT | Severe Thunderstorm Warning | GYX | 23 min |
| Jun 1, 10:02 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 12:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 1, 12:58 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 1, 1:50 PM EDT | Special Weather Statement | GYX | 40 min |
| Jun 1, 2:17 PM EDT | Severe Thunderstorm Warning | GYX | 43 min |
| Jun 1, 2:47 PM EDT | Tornado Warning | GYX | 28 min |
| Jun 1, 2:57 PM EDT | Severe Thunderstorm Warning | GYX | 33 min |
| Jun 1, 7:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 1, 7:35 PM EDT | Special Weather Statement | GYX | 40 min |
| Jun 1, 7:40 PM EDT | Tornado Watch | SPC | 2 hr |
| Jun 3, 3:16 PM EDT | Frost Advisory | GYX | 12 hr |
| Jun 8, 7:27 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 9, 9:01 AM EDT | Special Weather Statement | GYX | 14 min |
| Jun 9, 10:04 AM EDT | Special Weather Statement | GYX | 26 min |
| Jun 9, 10:06 AM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jun 9, 12:06 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 9, 2:39 PM EDT | Severe Thunderstorm Warning | GYX | 36 min |
| Jun 9, 3:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 9, 3:52 PM EDT | Special Weather Statement | GYX | 53 min |
| Jun 9, 4:06 PM EDT | Severe Thunderstorm Warning | GYX | 54 min |
| Jun 9, 7:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 18, 3:44 PM EDT | Special Weather Statement | GYX | 46 min |
| Jul 3, 12:30 PM EDT | Special Weather Statement | GYX | 90 min |
| Jul 3, 2:03 PM EDT | Special Weather Statement | GYX | 87 min |
| Jul 3, 3:30 PM EDT | Special Weather Statement | GYX | 90 min |
| Jul 4, 11:31 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 4, 12:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 2:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 6, 1:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 6, 1:29 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 3:56 PM EDT | Severe Thunderstorm Warning | GYX | 64 min |
| Jul 6, 4:12 PM EDT | Severe Thunderstorm Warning | GYX | 63 min |
| Jul 6, 4:28 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Jul 6, 5:00 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Jul 6, 6:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 17, 7:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 17, 7:41 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 17, 10:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jul 18, 8:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 21, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 3:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 21, 8:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 26, 11:05 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 26, 11:28 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 26, 3:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jul 26, 6:17 PM EDT | Special Weather Statement | GYX | 43 min |
| Jul 26, 6:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 26, 8:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Aug 2, 9:52 AM EDT | Special Weather Statement | GYX | 23 min |
| Aug 2, 9:55 AM EDT | Severe Thunderstorm Warning | GYX | 35 min |
| Aug 2, 10:28 AM EDT | Special Weather Statement | GYX | 32 min |
| Aug 19, 6:54 PM EDT | Special Weather Statement | GYX | 66 min |
| Aug 21, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 21, 3:20 PM EDT | Severe Thunderstorm Warning | GYX | 55 min |
| Aug 21, 3:24 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 21, 3:34 PM EDT | Special Weather Statement | GYX | 41 min |
| Aug 21, 4:00 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Aug 21, 4:36 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Aug 21, 4:45 PM EDT | Special Weather Statement | GYX | 45 min |
| Aug 22, 12:38 AM EDT | Areal Flood Advisory | GYX | 112 min |
| Aug 26, 3:03 PM EDT | Flood Watch | GYX | 57 hr |
| Aug 26, 5:17 PM EDT | Tropical Storm Watch | GYX | 18 hr |
| Aug 27, 11:40 AM EDT | Tropical Storm Warning | GYX | 36 hr |
| Aug 28, 9:47 AM EDT | Areal Flood Warning | GYX | 12 hr |
| Aug 28, 10:56 AM EDT | Special Weather Statement | GYX | 34 min |
| Aug 28, 1:16 PM EDT | River Flood Warning | GYX | 26 hr |
| Aug 28, 1:35 PM EDT | Flash Flood Warning | GYX | 6 hr |
| Aug 28, 6:35 PM EDT | Flash Flood Warning | GYX | 6 hr |
| Aug 29, 12:31 AM EDT | Areal Flood Warning | GYX | 8 hr |
| Aug 29, 1:29 AM EDT | River Flood Warning | GYX | 7 hr |
| Sep 4, 3:46 AM EDT | Flood Watch | GYX | 18 hr |
| Sep 4, 12:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Sep 4, 1:01 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 4, 1:13 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Sep 4, 1:19 PM EDT | Special Weather Statement | GYX | 56 min |
| Sep 4, 1:35 PM EDT | Severe Thunderstorm Warning | GYX | 55 min |
| Sep 4, 1:57 PM EDT | Severe Thunderstorm Warning | GYX | 63 min |
| Sep 4, 2:24 PM EDT | Severe Thunderstorm Warning | GYX | 66 min |
| Sep 4, 4:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 4, 4:24 PM EDT | Special Weather Statement | GYX | 66 min |
| Sep 4, 5:03 PM EDT | Severe Thunderstorm Warning | GYX | 57 min |
| Sep 4, 5:20 PM EDT | Areal Flood Advisory | GYX | 115 min |
| Sep 4, 6:37 PM EDT | Areal Flood Advisory | GYX | 113 min |
| Sep 4, 9:23 PM EDT | Flash Flood Watch | GYX | 29 hr |
| Sep 4, 9:40 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Sep 5, 5:31 AM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Sep 5, 6:55 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Sep 10, 9:07 AM EDT | Frost Advisory | GYX | 22 hr |
| Sep 13, 3:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Sep 14, 12:33 AM EDT | Areal Flood Advisory | GYX | 117 min |
| Sep 15, 7:19 PM EDT | Freeze Watch | GYX | 8 hr |
| Sep 16, 3:06 AM EDT | Freeze Warning | GYX | 29 hr |
| Oct 2, 4:02 AM EDT | Flood Watch | GYX | 11 hr |
| Oct 13, 3:15 PM EDT | Flood Watch | GYX | 36 hr |
| Oct 28, 3:45 AM EDT | Winter Storm Watch | GYX | 22 hr |
| Oct 29, 1:53 AM EDT | Winter Storm Warning | GYX | 32 hr |
| Nov 21, 3:00 PM EST | Winter Storm Watch | GYX | 13 hr |
| Nov 22, 3:57 AM EST | Winter Storm Warning | GYX | 35 hr |
| Nov 22, 10:08 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Nov 23, 7:48 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 7, 3:46 AM EST | Winter Weather Advisory | GYX | 11 hr |
| Dec 7, 2:52 PM EST | Winter Storm Warning | GYX | 16 hr |
| Dec 7, 10:25 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 14, 3:09 PM EST | Winter Weather Advisory | GYX | 21 hr |
| Dec 15, 3:55 PM EST | Wind Advisory | GYX | 23 hr |
| Dec 21, 3:58 AM EST | Winter Weather Advisory | GYX | 23 hr |
| Dec 27, 5:13 PM EST | Freezing Rain Advisory | GYX | 5 hr |
| Dec 28, 2:54 AM EST | Wind Chill Advisory | GYX | 30 hr |
| Dec 30, 3:36 AM EST | Winter Weather Advisory | GYX | 35 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.