Alert archive / New Hampshire / Strafford County
Weather alerts in Strafford County, New Hampshire, 2016
88 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Strafford County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 88
- Warnings
- 16
- Watches
- 7
- Advisories
- 36
- Busiest month
- December19 alerts
- Busiest day
- July 23, 20167 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Strafford County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 9 | 10% | 9 | 100% | 25 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 100% | 40 min |
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 1, 6:20 PM EST | Special Weather Statement | GYX | 3 hr |
| Jan 10, 3:15 AM EST | Wind Advisory | GYX | 17 hr |
| Jan 10, 6:53 PM EST | Special Weather Statement | GYX | 67 min |
| Jan 12, 3:42 AM EST | Winter Weather Advisory | GYX | 24 hr |
| Jan 15, 3:24 PM EST | Winter Weather Advisory | GYX | 22 hr |
| Jan 17, 3:01 PM EST | Winter Weather Advisory | GYX | 19 hr |
| Feb 4, 2:35 PM EST | Winter Weather Advisory | GYX | 27 hr |
| Feb 5, 8:16 AM EST | Winter Storm Warning | GYX | 11 hr |
| Feb 5, 12:12 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 7, 3:10 PM EST | Winter Weather Advisory | GYX | 39 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, 3:16 PM EST | Winter Weather Advisory | GYX | 46 hr |
| Feb 16, 3:24 AM EST | Wind Advisory | GYX | 19 hr |
| Feb 23, 3:43 PM EST | Winter Weather Advisory | GYX | 32 hr |
| Feb 25, 1:11 AM EST | Special Weather Statement | GYX | 64 min |
| Feb 25, 1:35 AM EST | Areal Flood Warning | GYX | 6 hr |
| Feb 25, 2:13 AM EST | Special Weather Statement | GYX | 77 min |
| Feb 25, 3:20 AM EST | Severe Thunderstorm Warning | GYX | 55 min |
| Feb 29, 3:59 PM EST | Winter Weather Advisory | GYX | 43 hr |
| Mar 17, 2:43 PM EDT | Special Weather Statement | GYX | 47 min |
| Mar 17, 4:01 PM EDT | Special Weather Statement | GYX | 44 min |
| Mar 20, 3:30 PM EDT | Winter Storm Warning | GYX | 24 hr |
| Mar 20, 3:30 PM EDT | Winter Weather Advisory | GYX | 24 hr |
| Mar 24, 3:32 AM EDT | Freezing Rain Advisory | GYX | 34 hr |
| Apr 1, 8:55 PM EDT | Severe Thunderstorm Warning | GYX | 25 min |
| Apr 1, 9:15 PM EDT | Special Weather Statement | GYX | 30 min |
| Apr 2, 3:18 PM EDT | Wind Advisory | GYX | 29 hr |
| Apr 2, 4:50 PM EDT | Special Weather Statement | GYX | 70 min |
| Apr 3, 9:45 PM EDT | Winter Weather Advisory | GYX | 20 hr |
| Apr 7, 2:58 AM EDT | Wind Advisory | GYX | 21 hr |
| Jun 7, 3:02 PM EDT | Severe Thunderstorm Warning | GYX | 28 min |
| Jun 22, 12:46 PM EDT | Special Weather Statement | GYX | 44 min |
| Jun 29, 12:27 PM EDT | Special Weather Statement | GYX | 63 min |
| Jun 29, 12:58 PM EDT | Severe Thunderstorm Warning | GYX | 32 min |
| Jun 29, 1:17 PM EDT | Areal Flood Advisory | GYX | 118 min |
| Jun 29, 1:21 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jul 1, 7:03 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| 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, 3:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 18, 6:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 23, 11:46 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 23, 3:10 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 23, 4:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 23, 5:23 PM EDT | Severe Thunderstorm Warning | GYX | 52 min |
| Jul 23, 5:50 PM EDT | Severe Thunderstorm Warning | GYX | 21 min |
| Jul 23, 6:08 PM EDT | Severe Thunderstorm Warning | GYX | 67 min |
| Jul 23, 6:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Aug 6, 2:19 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 6:15 PM EDT | Special Weather Statement | GYX | 45 min |
| Aug 10, 3:03 PM EDT | Heat Advisory | GYX | 52 hr |
| Aug 14, 3:11 AM EDT | Heat Advisory | GYX | 15 hr |
| Sep 7, 12:08 AM EDT | Dense Fog Advisory | GYX | 10 hr |
| Sep 8, 5:09 AM EDT | Dense Fog Advisory | GYX | 4 hr |
| Sep 11, 7:44 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 9:06 AM EDT | Severe Thunderstorm Warning | GYX | 54 min |
| Sep 11, 9:59 AM EDT | Severe Thunderstorm Warning | GYX | 61 min |
| Sep 19, 3:50 AM EDT | Special Weather Statement | GYX | 70 min |
| Sep 25, 2:40 PM EDT | Frost Advisory | GYX | 17 hr |
| Oct 10, 3:12 AM EDT | Frost Advisory | GYX | 29 hr |
| Oct 18, 8:59 PM EDT | Dense Fog Advisory | GYX | 4 hr |
| Oct 21, 9:12 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Oct 21, 9:50 PM EDT | Flash Flood Warning | GYX | 115 min |
| Oct 23, 12:37 PM EDT | Wind Advisory | GYX | 4 hr |
| Nov 11, 1:45 PM EST | Wind Advisory | GYX | 6 hr |
| Nov 26, 5:02 AM EST | Dense Fog Advisory | GYX | 4 hr |
| Nov 28, 3:08 PM EST | Winter Weather Advisory | GYX | 33 hr |
| Nov 30, 4:47 AM EST | Dense Fog Advisory | GYX | 4 hr |
| Dec 10, 3:06 PM EST | Winter Storm Watch | GYX | 20 hr |
| Dec 11, 3:25 AM EST | Winter Weather Advisory | GYX | 36 hr |
| Dec 14, 3:33 PM EST | Wind Chill Watch | GYX | 12 hr |
| Dec 15, 3:22 AM EST | Wind Chill Advisory | GYX | 30 hr |
| Dec 15, 10:00 AM EST | Wind Advisory | GYX | 14 hr |
| Dec 15, 11:52 AM EST | Special Weather Statement | GYX | 53 min |
| Dec 15, 7:59 PM EST | Special Weather Statement | GYX | 61 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 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 28, 3:47 PM EST | Wind Advisory | GYX | 47 hr |
| Dec 29, 3:09 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 29, 7:10 PM EST | Special Weather Statement | GYX | 95 min |
| Dec 29, 8:34 PM EST | Special Weather Statement | GYX | 86 min |
| 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.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 10 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind Chill Watch | 2 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
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.