Alert archive / New Hampshire / Sullivan County
Weather alerts in Sullivan County, New Hampshire, 2015
111 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sullivan County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 111
- Warnings
- 26
- Watches
- 17
- Advisories
- 28
- Busiest month
- August20 alerts
- Busiest day
- August 4, 201511 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sullivan County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 11 | 21% | 6 | 83% | 22 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 3 | 0 | 100% | 1 | 0% | |
| NWS Gray, ME: severe thunderstorm warnings | 163 | 132 | 19% | 255 | 89% | 22 min |
| NWS Gray, ME: flash flood warnings | 14 | 8 | 43% | 19 | 74% | 43 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 2, 3:44 AM EST | Winter Storm Watch | GYX | 24 hr |
| Jan 3, 3:35 AM EST | Winter Storm Warning | GYX | 36 hr |
| Jan 4, 4:08 PM EST | Dense Fog Advisory | GYX | 6 hr |
| Jan 5, 3:30 AM EST | Wind Advisory | GYX | 14 hr |
| Jan 6, 3:40 PM EST | Wind Chill Warning | GYX | 42 hr |
| Jan 7, 2:16 PM EST | Special Weather Statement | GYX | 74 min |
| Jan 16, 9:25 AM EST | Special Weather Statement | GYX | 80 min |
| Jan 18, 3:51 AM EST | Freezing Rain Advisory | GYX | 17 hr |
| Jan 25, 3:59 AM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 25, 3:46 PM EST | Winter Storm Warning | GYX | 60 hr |
| Jan 25, 3:46 PM EST | Winter Weather Advisory | GYX | 57 hr |
| Jan 29, 3:52 AM EST | Winter Weather Advisory | GYX | 48 hr |
| Jan 30, 3:14 PM EST | Wind Chill Advisory | GYX | 48 hr |
| Jan 31, 3:06 PM EST | Winter Storm Watch | GYX | 21 hr |
| Feb 1, 3:32 AM EST | Winter Storm Warning | GYX | 45 hr |
| Feb 5, 3:51 PM EST | Wind Chill Advisory | GYX | 17 hr |
| Feb 6, 3:34 PM EST | Winter Storm Watch | GYX | 36 hr |
| Feb 7, 3:46 PM EST | Winter Storm Warning | GYX | 56 hr |
| Feb 12, 3:57 PM EST | Winter Storm Watch | GYX | 24 hr |
| Feb 13, 3:36 PM EST | Winter Storm Warning | GYX | 44 hr |
| Feb 14, 10:33 PM EST | Winter Weather Advisory | GYX | 20 hr |
| Feb 15, 3:31 AM EST | Wind Chill Warning | GYX | 36 hr |
| Feb 21, 3:03 AM EST | Winter Weather Advisory | GYX | 27 hr |
| Feb 22, 3:23 PM EST | Wind Chill Warning | GYX | 39 hr |
| Feb 22, 3:23 PM EST | Wind Chill Advisory | GYX | 39 hr |
| Mar 3, 3:20 AM EST | Winter Weather Advisory | GYX | 24 hr |
| Mar 11, 4:19 AM EDT | Dense Fog Advisory | GYX | 4 hr |
| Mar 13, 3:20 PM EDT | Winter Weather Advisory | GYX | 37 hr |
| Mar 17, 3:23 PM EDT | Wind Advisory | GYX | 26 hr |
| Mar 21, 3:26 PM EDT | Wind Advisory | GYX | 29 hr |
| Mar 26, 6:53 PM EDT | Dense Fog Advisory | GYX | 3 hr |
| Apr 8, 3:21 PM EDT | Winter Weather Advisory | GYX | 19 hr |
| Apr 9, 3:36 PM EDT | Freezing Rain Advisory | GYX | 18 hr |
| Apr 10, 2:42 PM EDT | Special Weather Statement | GYX | 48 min |
| Apr 19, 3:19 AM EDT | Flood Watch | GYX | 62 hr |
| Apr 21, 3:48 AM EDT | Special Weather Statement | GYX | 72 min |
| Apr 22, 6:54 PM EDT | Special Weather Statement | GYX | 51 min |
| May 10, 6:24 PM EDT | Special Weather Statement | GYX | 51 min |
| May 10, 6:34 PM EDT | Severe Thunderstorm Warning | GYX | 26 min |
| May 10, 6:59 PM EDT | Severe Thunderstorm Warning | GYX | 31 min |
| May 13, 3:34 PM EDT | Frost Advisory | GYX | 16 hr |
| May 20, 3:14 AM EDT | Freeze Watch | GYX | 11 hr |
| May 20, 2:25 PM EDT | Freeze Warning | GYX | 16 hr |
| May 21, 2:42 PM EDT | Freeze Watch | GYX | 24 hr |
| May 22, 2:37 PM EDT | Freeze Warning | GYX | 16 hr |
| May 27, 2:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 4:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| May 27, 5:02 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 27, 5:17 PM EDT | Severe Thunderstorm Warning | GYX | 43 min |
| May 27, 5:24 PM EDT | Flash Flood Warning | GYX | 3 hr |
| May 28, 11:16 AM EDT | Mesoscale Discussion | SPC | 89 min |
| May 28, 11:30 AM EDT | Mesoscale Discussion | SPC | 60 min |
| May 28, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 3:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 9, 3:16 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 9, 4:13 PM EDT | Special Weather Statement | GYX | 62 min |
| Jun 9, 4:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 9, 5:07 PM EDT | Severe Thunderstorm Warning | GYX | 38 min |
| Jun 9, 5:21 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jun 23, 10:12 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 23, 2:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 23, 3:47 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 23, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 23, 8:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 1, 6:50 AM EDT | Special Weather Statement | GYX | 55 min |
| Jul 1, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 2:52 PM EDT | Special Weather Statement | GYX | 38 min |
| Jul 19, 1:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 19, 7:17 PM EDT | Severe Thunderstorm Warning | GYX | 43 min |
| Jul 19, 7:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 19, 7:57 PM EDT | Severe Thunderstorm Warning | GYX | 32 min |
| Jul 28, 2:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 30, 1:45 PM EDT | Special Weather Statement | GYX | 75 min |
| Aug 3, 12:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 1:16 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 3, 5:08 PM EDT | Severe Thunderstorm Warning | GYX | 67 min |
| Aug 3, 5:57 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Aug 3, 6:35 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Aug 4, 11:15 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 4, 12:18 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 4, 12:32 PM EDT | Special Weather Statement | GYX | 28 min |
| Aug 4, 12:45 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Aug 4, 12:55 PM EDT | Special Weather Statement | GYX | 35 min |
| Aug 4, 1:28 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Aug 4, 2:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 4, 5:33 PM EDT | Special Weather Statement | GYX | 27 min |
| Aug 4, 5:59 PM EDT | Special Weather Statement | GYX | 31 min |
| Aug 4, 6:07 PM EDT | Severe Thunderstorm Warning | GYX | 53 min |
| Aug 4, 6:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 15, 5:33 PM EDT | Special Weather Statement | GYX | 42 min |
| Aug 25, 9:59 AM EDT | Areal Flood Advisory | GYX | 5 hr |
| Aug 25, 3:48 PM EDT | Special Weather Statement | GYX | 42 min |
| Aug 25, 5:10 PM EDT | Special Weather Statement | GYX | 50 min |
| Sep 8, 2:27 PM EDT | Special Weather Statement | GYX | 48 min |
| Sep 8, 2:37 PM EDT | Severe Thunderstorm Warning | GYX | 38 min |
| Sep 9, 6:48 PM EDT | Special Weather Statement | GYX | 42 min |
| Sep 29, 3:29 AM EDT | Flood Watch | GYX | 36 hr |
| Sep 30, 7:50 AM EDT | Areal Flood Warning | GYX | 4 hr |
| Oct 4, 3:13 PM EDT | Frost Advisory | GYX | 17 hr |
| Oct 29, 1:09 PM EDT | Special Weather Statement | GYX | 51 min |
| Dec 1, 3:18 AM EST | Freezing Rain Advisory | GYX | 28 hr |
| Dec 10, 7:41 PM EST | Dense Fog Advisory | GYX | 15 hr |
| Dec 14, 3:08 PM EST | Wind Advisory | GYX | 24 hr |
| Dec 14, 6:04 PM EST | Dense Fog Advisory | GYX | 4 hr |
| Dec 19, 12:43 PM EST | Special Weather Statement | GYX | 2 hr |
| Dec 22, 9:20 PM EST | Dense Fog Advisory | GYX | 24 hr |
| Dec 27, 3:37 PM EST | Winter Weather Advisory | GYX | 56 hr |
| Dec 28, 10:25 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 29, 3:42 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 30, 3:39 AM EST | Freezing Rain Advisory | GYX | 23 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 | 14 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 21 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 5 |
| Freezing Rain Advisory | 4 |
| Winter Weather Advisory | 8 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.