Alert archive / New Hampshire / Sullivan County
Weather alerts in Sullivan County, New Hampshire, 2017
128 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 128
- Warnings
- 28
- Watches
- 18
- Advisories
- 33
- Busiest month
- February16 alerts
- Busiest day
- July 1, 20178 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, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 12 | 20% | 2 | 100% | 24 min |
| Flash flood warnings | 4 | 4 | 0% | 2 | 50% | 66 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 7 | 3 | 57% | 10 | 80% | 16 min |
| NWS Gray, ME: severe thunderstorm warnings | 88 | 66 | 25% | 173 | 84% | 27 min |
| NWS Gray, ME: flash flood warnings | 25 | 14 | 44% | 51 | 90% | 92 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, 3:38 PM EST | Winter Weather Advisory | GYX | 39 hr |
| Jan 16, 3:12 PM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 17, 3:29 AM EST | Winter Weather Advisory | GYX | 38 hr |
| Jan 22, 3:18 PM EST | Winter Storm Watch | GYX | 25 hr |
| Jan 23, 3:18 AM EST | Winter Weather Advisory | GYX | 48 hr |
| Jan 23, 11:48 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 24, 5:44 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 6, 3:09 PM EST | Winter Weather Advisory | GYX | 42 hr |
| Feb 7, 5:44 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 7, 11:18 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 8, 3:15 PM EST | Winter Storm Warning | GYX | 31 hr |
| Feb 8, 3:15 PM EST | Winter Weather Advisory | GYX | 18 hr |
| Feb 9, 4:55 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 10, 3:45 PM EST | Winter Storm Watch | GYX | 25 hr |
| Feb 11, 4:20 PM EST | Winter Storm Warning | GYX | 51 hr |
| Feb 12, 9:59 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 12, 2:51 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 14, 3:50 PM EST | Winter Weather Advisory | GYX | 42 hr |
| Feb 15, 1:26 PM EST | Special Weather Statement | GYX | 64 min |
| Feb 15, 2:26 PM EST | Special Weather Statement | GYX | 64 min |
| Feb 23, 2:58 PM EST | Flood Watch | GYX | 4 days |
| Feb 25, 6:24 PM EST | Mesoscale Discussion | SPC | 66 min |
| Feb 25, 7:59 PM EST | Special Weather Statement | GYX | 61 min |
| Mar 1, 3:28 AM EST | Wind Advisory | GYX | 39 hr |
| Mar 1, 11:12 PM EST | Dense Fog Advisory | GYX | 7 hr |
| Mar 8, 12:46 AM EST | Dense Fog Advisory | GYX | 8 hr |
| Mar 8, 2:56 PM EST | Special Weather Statement | GYX | 79 min |
| Mar 8, 4:28 PM EST | Special Weather Statement | GYX | 47 min |
| Mar 9, 8:14 AM EST | Wind Advisory | GYX | 8 hr |
| Mar 10, 3:02 AM EST | Wind Chill Advisory | GYX | 53 hr |
| Mar 11, 4:01 PM EST | Winter Storm Watch | GYX | 35 hr |
| Mar 13, 3:58 AM EDT | Winter Storm Warning | GYX | 55 hr |
| Mar 14, 9:04 AM EDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 14, 1:57 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 26, 4:08 AM EDT | Freezing Rain Advisory | GYX | 17 hr |
| Mar 26, 9:14 PM EDT | Freezing Rain Advisory | GYX | 18 hr |
| Mar 29, 3:56 PM EDT | Winter Storm Watch | GYX | 35 hr |
| Mar 30, 3:57 PM EDT | Winter Storm Warning | GYX | 51 hr |
| Mar 31, 8:17 PM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 4, 3:40 PM EDT | Flood Watch | GYX | 60 hr |
| Apr 11, 5:56 PM EDT | Special Weather Statement | GYX | 34 min |
| Apr 16, 6:05 PM EDT | Special Weather Statement | GYX | 40 min |
| May 1, 10:45 PM EDT | Special Weather Statement | GYX | 45 min |
| May 18, 7:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 18, 8:42 PM EDT | Severe Thunderstorm Warning | GYX | 63 min |
| May 31, 12:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 31, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 31, 4:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 31, 5:17 PM EDT | Severe Thunderstorm Warning | GYX | 58 min |
| May 31, 6:13 PM EDT | Special Weather Statement | GYX | 62 min |
| May 31, 7:06 PM EDT | Areal Flood Advisory | GYX | 114 min |
| Jun 1, 3:30 AM EDT | Dense Fog Advisory | GYX | 5 hr |
| Jun 18, 3:19 AM EDT | Flash Flood Watch | GYX | 41 hr |
| Jun 19, 10:45 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 19, 12:24 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 2:39 PM EDT | Flash Flood Warning | GYX | 6 hr |
| Jun 19, 2:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 3:30 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jun 19, 3:44 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| Jun 19, 4:57 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Jun 23, 2:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 12:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 4:09 PM EDT | Severe Thunderstorm Warning | GYX | 20 min |
| Jun 30, 12:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 1:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 4:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 30, 7:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 1, 11:01 AM EDT | Special Weather Statement | GYX | 29 min |
| Jul 1, 12:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 1, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 1, 4:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 5:04 PM EDT | Severe Thunderstorm Warning | GYX | 56 min |
| Jul 1, 5:39 PM EDT | Flash Flood Warning | GYX | 2 hr |
| Jul 1, 7:16 PM EDT | Severe Thunderstorm Warning | GYX | 59 min |
| Jul 1, 7:58 PM EDT | Flash Flood Warning | GYX | 2 hr |
| Jul 8, 12:16 PM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Jul 12, 8:52 PM EDT | Special Weather Statement | GYX | 23 min |
| Jul 12, 9:35 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jul 17, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 6:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 2, 1:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 11:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 5, 3:16 PM EDT | Special Weather Statement | GYX | 59 min |
| Aug 5, 4:48 PM EDT | Severe Thunderstorm Warning | GYX | 23 min |
| Aug 9, 6:31 AM EDT | Dense Fog Advisory | GYX | 107 min |
| Aug 9, 5:01 PM EDT | Special Weather Statement | GYX | 29 min |
| Aug 12, 6:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 18, 4:09 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 18, 6:59 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 22, 3:55 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 22, 5:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 22, 8:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 22, 9:20 PM EDT | Severe Thunderstorm Warning | GYX | 55 min |
| Aug 22, 9:52 PM EDT | Severe Thunderstorm Warning | GYX | 53 min |
| Aug 22, 10:08 PM EDT | Severe Thunderstorm Warning | GYX | 67 min |
| Sep 5, 3:46 PM EDT | Special Weather Statement | GYX | 29 min |
| Sep 5, 3:57 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Sep 5, 4:27 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Sep 5, 4:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 5, 5:05 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Sep 5, 7:26 PM EDT | Special Weather Statement | BTV | 19 min |
| Sep 6, 3:29 AM EDT | Flash Flood Watch | GYX | 24 hr |
| Sep 25, 7:08 AM EDT | Dense Fog Advisory | GYX | 112 min |
| Sep 25, 8:33 PM EDT | Dense Fog Advisory | GYX | 12 hr |
| Sep 30, 3:19 AM EDT | Frost Advisory | GYX | 29 hr |
| Oct 12, 2:37 PM EDT | Frost Advisory | GYX | 16 hr |
| Oct 24, 10:04 PM EDT | Areal Flood Advisory | GYX | 6 hr |
| Oct 24, 11:43 PM EDT | Areal Flood Advisory | GYX | 4 hr |
| Oct 28, 3:55 AM EDT | Flash Flood Watch | GYX | 63 hr |
| Oct 29, 3:59 AM EDT | High Wind Warning | GYX | 30 hr |
| Oct 29, 3:59 AM EDT | Wind Advisory | GYX | 38 hr |
| Oct 30, 1:19 AM EDT | Areal Flood Warning | GYX | 6 hr |
| Nov 9, 3:25 PM EST | Wind Advisory | GYX | 29 hr |
| Nov 10, 2:24 AM EST | Special Weather Statement | GYX | 66 min |
| Nov 18, 2:48 PM EST | Wind Advisory | GYX | 30 hr |
| Dec 9, 3:22 AM EST | Winter Weather Advisory | GYX | 24 hr |
| Dec 10, 3:16 PM EST | Winter Storm Watch | GYX | 24 hr |
| Dec 11, 3:32 PM EST | Winter Storm Warning | GYX | 44 hr |
| Dec 11, 3:32 PM EST | Winter Weather Advisory | GYX | 32 hr |
| Dec 21, 3:45 PM EST | Winter Storm Watch | GYX | 8 hr |
| Dec 21, 3:45 PM EST | Winter Weather Advisory | GYX | 53 hr |
| Dec 21, 11:29 PM EST | Winter Storm Warning | GYX | 27 hr |
| Dec 23, 9:50 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 2:59 PM EST | Winter Storm Watch | GYX | 12 hr |
| Dec 24, 2:51 AM EST | Winter Storm Warning | GYX | 36 hr |
| Dec 25, 4:36 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 27, 3:55 AM EST | Wind Chill Advisory | GYX | 57 hr |
| Dec 30, 3:22 AM EST | Wind Chill Advisory | GYX | 24 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 | 15 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 33 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 3 |
| Flood Watch | 2 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 8 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 9 |
| Cold | |
| Frost Advisory | 2 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 5 |
| 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 archive20162018
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.