Alert archive / New Hampshire / Coos County
Weather alerts in Coos County, New Hampshire, 2016
91 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 91
- Warnings
- 23
- Watches
- 7
- Advisories
- 28
- Busiest month
- July23 alerts
- Busiest day
- July 18, 201612 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 2016 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.
Coos County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 2 | 0% | |
| Severe thunderstorm warnings | 14 | 9 | 36% | 8 | 75% | 23 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 3 | 0 | 100% | 2 | 0% | |
| NWS Gray, ME: severe thunderstorm warnings | 112 | 92 | 18% | 260 | 90% | 22 min |
| NWS Gray, ME: flash flood warnings | 9 | 6 | 33% | 20 | 100% | 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 9, 3:22 PM EST | Flood Watch | GYX | 33 hr |
| Jan 12, 3:42 AM EST | Winter Weather Advisory | GYX | 24 hr |
| Jan 15, 3:41 AM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 15, 3:24 PM EST | Winter Weather Advisory | GYX | 22 hr |
| Jan 18, 2:51 PM EST | Wind Chill Advisory | GYX | 18 hr |
| Jan 19, 3:27 AM EST | Winter Weather Advisory | GYX | 25 hr |
| Feb 2, 3:26 PM EST | Winter Weather Advisory | GYX | 25 hr |
| Feb 7, 3:10 PM EST | Winter Weather Advisory | GYX | 39 hr |
| Feb 11, 3:20 PM EST | Wind Chill Advisory | GYX | 18 hr |
| Feb 11, 6:03 PM EST | Wind Chill Watch | GYX | 15 hr |
| Feb 12, 9:01 AM EST | Wind Chill Warning | GYX | 49 hr |
| Feb 14, 11:07 AM EST | Wind Chill Advisory | GYX | 8 hr |
| Feb 14, 3:16 PM EST | Winter Weather Advisory | GYX | 46 hr |
| Feb 23, 3:43 PM EST | Winter Weather Advisory | GYX | 32 hr |
| Feb 25, 1:35 AM EST | Areal Flood Warning | GYX | 6 hr |
| Feb 25, 6:17 PM EST | Areal Flood Advisory | GYX | 3 hr |
| Feb 25, 8:44 PM EST | Areal Flood Advisory | GYX | 5 hr |
| Feb 29, 3:59 PM EST | Winter Weather Advisory | GYX | 43 hr |
| Feb 29, 11:12 PM EST | Special Weather Statement | GYX | 93 min |
| Mar 2, 6:56 PM EST | Wind Chill Advisory | GYX | 15 hr |
| Mar 14, 3:41 AM EDT | Winter Weather Advisory | GYX | 31 hr |
| Mar 17, 1:01 PM EDT | Special Weather Statement | GYX | 44 min |
| Mar 24, 3:32 AM EDT | Freezing Rain Advisory | GYX | 34 hr |
| Apr 2, 3:18 PM EDT | Wind Advisory | GYX | 29 hr |
| May 27, 9:48 PM EDT | Special Weather Statement | GYX | 57 min |
| May 30, 6:22 PM EDT | Special Weather Statement | GYX | 23 min |
| May 30, 6:41 PM EDT | Special Weather Statement | GYX | 34 min |
| Jun 7, 8:33 PM EDT | Special Weather Statement | GYX | 42 min |
| Jun 21, 12:56 AM EDT | Special Weather Statement | GYX | 34 min |
| Jun 28, 2:05 PM EDT | Special Weather Statement | GYX | 25 min |
| Jun 28, 6:57 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jun 28, 8:57 PM EDT | Flash Flood Warning | GYX | 4 hr |
| Jun 28, 11:38 PM EDT | Areal Flood Advisory | GYX | 112 min |
| Jun 29, 10:04 AM EDT | Flash Flood Watch | GYX | 9 hr |
| Jun 29, 12:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 29, 1:03 PM EDT | Special Weather Statement | GYX | 42 min |
| Jun 29, 1:25 PM EDT | Severe Thunderstorm Warning | GYX | 50 min |
| Jun 29, 2:00 PM EDT | Areal Flood Advisory | GYX | 2 hr |
| Jul 1, 8:08 PM EDT | Severe Thunderstorm Warning | GYX | 67 min |
| Jul 1, 9:06 PM EDT | Severe Thunderstorm Warning | GYX | 54 min |
| Jul 7, 2:35 PM EDT | Special Weather Statement | GYX | 25 min |
| Jul 7, 2:43 PM EDT | Severe Thunderstorm Warning | GYX | 62 min |
| Jul 7, 3:39 PM EDT | Special Weather Statement | GYX | 36 min |
| Jul 7, 5:46 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jul 14, 5:07 PM EDT | Severe Thunderstorm Warning | GYX | 53 min |
| Jul 14, 5:48 PM EDT | Severe Thunderstorm Warning | GYX | 57 min |
| Jul 18, 10:32 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 18, 11:12 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 18, 12:16 PM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Jul 18, 12:55 PM EDT | Severe Thunderstorm Warning | GYX | 65 min |
| Jul 18, 1:06 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jul 18, 1:28 PM EDT | Tornado Warning | GYX | 32 min |
| Jul 18, 3:03 PM EDT | Severe Thunderstorm Warning | GYX | 57 min |
| Jul 18, 3:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 18, 4:03 PM EDT | Special Weather Statement | GYX | 27 min |
| Jul 18, 4:27 PM EDT | Special Weather Statement | GYX | 33 min |
| Jul 18, 5:58 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Jul 18, 6:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 18, 8:47 PM EDT | Special Weather Statement | GYX | 43 min |
| Jul 22, 11:26 PM EDT | Severe Thunderstorm Warning | GYX | 64 min |
| Jul 23, 11:46 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 12, 12:31 PM EDT | Special Weather Statement | GYX | 44 min |
| Aug 28, 7:11 PM EDT | Special Weather Statement | GYX | 49 min |
| Aug 28, 8:02 PM EDT | Special Weather Statement | GYX | 28 min |
| Aug 31, 8:07 PM EDT | Special Weather Statement | GYX | 38 min |
| Aug 31, 8:41 PM EDT | Special Weather Statement | GYX | 49 min |
| Aug 31, 9:02 PM EDT | Special Weather Statement | GYX | 43 min |
| Aug 31, 9:42 PM EDT | Special Weather Statement | GYX | 48 min |
| Sep 11, 3:53 AM EDT | Wind Advisory | GYX | 14 hr |
| Sep 11, 7:22 AM EDT | Special Weather Statement | GYX | 53 min |
| Sep 11, 7:34 AM EDT | Special Weather Statement | GYX | 41 min |
| Sep 11, 7:44 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 7:51 AM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Sep 11, 8:06 AM EDT | Severe Thunderstorm Warning | GYX | 54 min |
| Sep 15, 2:56 PM EDT | Frost Advisory | GYX | 17 hr |
| Sep 24, 3:53 AM EDT | Freeze Warning | GYX | 28 hr |
| Sep 25, 2:40 PM EDT | Freeze Warning | GYX | 17 hr |
| Nov 28, 3:08 PM EST | Winter Weather Advisory | GYX | 33 hr |
| Dec 11, 3:25 AM EST | Winter Weather Advisory | GYX | 36 hr |
| Dec 14, 3:09 AM EST | Wind Chill Watch | GYX | 12 hr |
| Dec 14, 3:33 PM EST | Wind Chill Warning | GYX | 44 hr |
| Dec 15, 10:37 AM EST | Special Weather Statement | GYX | 23 min |
| Dec 16, 3:27 AM EST | Winter Weather Advisory | GYX | 58 hr |
| Dec 17, 10:01 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 17, 8:00 PM EST | Freezing Rain Advisory | GYX | 17 hr |
| Dec 18, 2:17 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 25, 3:16 PM EST | Winter Weather Advisory | GYX | 37 hr |
| Dec 26, 3:42 AM EST | Freezing Rain Advisory | GYX | 24 hr |
| Dec 27, 3:27 PM EST | Winter Storm Watch | GYX | 24 hr |
| Dec 28, 4:24 AM EST | Winter Storm Warning | GYX | 53 hr |
| Dec 29, 9:10 PM EST | Mesoscale Discussion | SPC | 6 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 archive20152017
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.