Alert archive / New Hampshire / Sullivan County
Weather alerts in Sullivan County, New Hampshire, 2018
138 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 138
- Warnings
- 27
- Watches
- 20
- Advisories
- 45
- Busiest month
- July30 alerts
- Busiest day
- July 27, 20189 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, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 12 | 14% | 8 | 88% | 15 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 8 | 1 | 88% | 3 | 33% | 20 min |
| NWS Gray, ME: severe thunderstorm warnings | 104 | 78 | 25% | 223 | 84% | 24 min |
| NWS Gray, ME: flash flood warnings | 16 | 7 | 56% | 21 | 76% | 73 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, 2:51 PM EST | Winter Storm Watch | GYX | 24 hr |
| Jan 3, 3:11 PM EST | Winter Storm Warning | GYX | 36 hr |
| Jan 4, 11:34 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 4, 2:58 PM EST | Wind Chill Watch | GYX | 12 hr |
| Jan 5, 3:04 AM EST | Wind Chill Warning | GYX | 55 hr |
| Jan 10, 2:57 AM EST | Winter Weather Advisory | GYX | 27 hr |
| Jan 11, 3:44 PM EST | Flood Watch | GYX | 44 hr |
| Jan 12, 4:34 AM EST | Winter Weather Advisory | GYX | 33 hr |
| Jan 12, 7:59 AM EST | Dense Fog Advisory | GYX | 21 hr |
| Jan 12, 1:41 PM EST | Areal Flood Advisory | GYX | 6 hr |
| Jan 13, 12:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 13, 1:23 AM EST | Areal Flood Warning | GYX | 9 hr |
| Jan 15, 3:07 PM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 16, 3:33 AM EST | Winter Weather Advisory | GYX | 39 hr |
| Jan 21, 2:57 PM EST | Flood Watch | GYX | 48 hr |
| Jan 22, 3:06 AM EST | Winter Weather Advisory | GYX | 41 hr |
| Jan 22, 3:25 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 4, 3:18 AM EST | Winter Weather Advisory | GYX | 27 hr |
| Feb 5, 3:14 PM EST | Winter Storm Watch | GYX | 24 hr |
| Feb 6, 3:18 PM EST | Winter Storm Warning | GYX | 32 hr |
| Feb 7, 11:25 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 7, 6:21 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 3:27 AM EST | Winter Weather Advisory | GYX | 42 hr |
| Feb 10, 7:48 PM EST | Dense Fog Advisory | GYX | 8 hr |
| Feb 20, 3:34 AM EST | Flood Watch | GYX | 44 hr |
| Feb 24, 3:18 PM EST | Winter Weather Advisory | GYX | 27 hr |
| Feb 26, 7:18 AM EST | Dense Fog Advisory | GYX | 102 min |
| Mar 1, 10:15 AM EST | Winter Storm Watch | GYX | 17 hr |
| Mar 2, 3:14 AM EST | Winter Weather Advisory | GYX | 16 hr |
| Mar 5, 3:36 AM EST | Winter Storm Watch | GYX | 24 hr |
| Mar 6, 3:38 AM EST | Winter Storm Warning | GYX | 63 hr |
| Mar 11, 3:49 AM EDT | Winter Storm Watch | GYX | 24 hr |
| Mar 12, 3:41 AM EDT | Winter Storm Warning | GYX | 66 hr |
| Apr 3, 4:10 PM EDT | Wind Advisory | GYX | 36 hr |
| Apr 4, 4:12 AM EDT | High Wind Warning | GYX | 17 hr |
| Apr 11, 4:46 AM EDT | Dense Fog Advisory | GYX | 2 hr |
| Apr 14, 3:44 PM EDT | Winter Weather Advisory | GYX | 56 hr |
| Apr 15, 11:15 AM EDT | Wind Advisory | GYX | 39 hr |
| May 4, 12:58 PM EDT | Wind Advisory | GYX | 18 hr |
| May 4, 2:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 4, 6:20 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 4, 8:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 4, 9:09 PM EDT | Severe Thunderstorm Warning | GYX | 66 min |
| May 11, 3:11 AM EDT | Frost Advisory | GYX | 28 hr |
| May 15, 1:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 3:02 PM EDT | Special Weather Statement | GYX | 73 min |
| May 26, 1:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 13, 10:43 PM EDT | Special Weather Statement | GYX | 62 min |
| Jun 17, 2:51 PM EDT | Heat Advisory | GYX | 27 hr |
| Jun 18, 12:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 18, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 4:47 PM EDT | Severe Thunderstorm Warning | GYX | 58 min |
| Jun 18, 5:24 PM EDT | Severe Thunderstorm Warning | GYX | 51 min |
| Jun 18, 7:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 27, 3:11 PM EDT | Flash Flood Watch | GYX | 24 hr |
| Jun 30, 3:19 AM EDT | Heat Advisory | GYX | 64 hr |
| Jun 30, 10:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 8:17 PM EDT | Heat Advisory | GYX | 23 hr |
| Jul 4, 3:22 PM EDT | Heat Advisory | GYX | 29 hr |
| Jul 5, 12:59 PM EDT | Special Weather Statement | GYX | 46 min |
| Jul 10, 4:02 PM EDT | Special Weather Statement | GYX | 28 min |
| Jul 10, 4:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 6:24 PM EDT | Severe Thunderstorm Warning | GYX | 51 min |
| Jul 10, 7:01 PM EDT | Special Weather Statement | GYX | 44 min |
| Jul 15, 5:29 PM EDT | Special Weather Statement | BTV | 46 min |
| Jul 17, 7:28 AM EDT | Special Weather Statement | GYX | 47 min |
| Jul 17, 7:56 AM EDT | Severe Thunderstorm Warning | GYX | 37 min |
| Jul 17, 9:35 AM EDT | Special Weather Statement | GYX | 40 min |
| Jul 17, 10:02 AM EDT | Special Weather Statement | GYX | 43 min |
| Jul 17, 10:14 AM EDT | Severe Thunderstorm Warning | GYX | 61 min |
| Jul 17, 10:35 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 27, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 2:15 PM EDT | Special Weather Statement | GYX | 45 min |
| Jul 27, 2:18 PM EDT | Special Weather Statement | BTV | 27 min |
| Jul 27, 2:32 PM EDT | Special Weather Statement | GYX | 43 min |
| Jul 27, 2:41 PM EDT | Severe Thunderstorm Warning | GYX | 49 min |
| Jul 27, 3:32 PM EDT | Special Weather Statement | GYX | 43 min |
| Jul 27, 3:36 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jul 27, 4:03 PM EDT | Special Weather Statement | GYX | 42 min |
| Jul 27, 4:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 28, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 28, 3:04 PM EDT | Severe Thunderstorm Warning | GYX | 41 min |
| Jul 28, 3:34 PM EDT | Severe Thunderstorm Warning | GYX | 41 min |
| Jul 28, 4:08 PM EDT | Severe Thunderstorm Warning | GYX | 67 min |
| Jul 28, 6:17 PM EDT | Severe Thunderstorm Warning | GYX | 58 min |
| Jul 28, 6:46 PM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Aug 3, 11:45 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 2:50 PM EDT | Flash Flood Watch | GYX | 23 hr |
| Aug 3, 3:01 PM EDT | Special Weather Statement | GYX | 44 min |
| Aug 3, 3:15 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Aug 3, 3:25 PM EDT | Flash Flood Warning | GYX | 4 hr |
| Aug 5, 3:23 PM EDT | Heat Advisory | GYX | 51 hr |
| Aug 7, 1:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Aug 17, 5:42 PM EDT | Special Weather Statement | BTV | 63 min |
| Aug 17, 6:25 PM EDT | Special Weather Statement | GYX | 65 min |
| Aug 21, 6:01 AM EDT | Dense Fog Advisory | GYX | 3 hr |
| Aug 27, 2:59 AM EDT | Heat Advisory | GYX | 65 hr |
| Aug 29, 6:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 29, 6:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 6, 12:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 6, 12:32 PM EDT | Special Weather Statement | GYX | 58 min |
| Sep 14, 3:14 AM EDT | Dense Fog Advisory | GYX | 3 hr |
| Sep 14, 3:02 PM EDT | Dense Fog Advisory | GYX | 18 hr |
| Sep 22, 3:33 AM EDT | Frost Advisory | GYX | 29 hr |
| Sep 26, 2:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 26, 7:21 PM EDT | Special Weather Statement | GYX | 24 min |
| Oct 5, 2:35 AM EDT | Frost Advisory | GYX | 25 hr |
| Oct 13, 3:05 AM EDT | Frost Advisory | GYX | 29 hr |
| Oct 13, 3:05 AM EDT | Freeze Warning | GYX | 29 hr |
| Nov 2, 3:46 AM EDT | High Wind Watch | GYX | 24 hr |
| Nov 3, 12:11 AM EDT | Flood Watch | GYX | 11 hr |
| Nov 3, 3:55 AM EDT | Wind Advisory | GYX | 18 hr |
| Nov 10, 2:57 AM EST | Wind Advisory | GYX | 28 hr |
| Nov 13, 3:02 PM EST | Wind Advisory | GYX | 6 hr |
| Nov 13, 9:17 PM EST | Wind Advisory | GYX | 17 hr |
| Nov 14, 3:00 PM EST | Winter Storm Watch | GYX | 12 hr |
| Nov 15, 3:27 AM EST | Winter Storm Warning | GYX | 35 hr |
| Nov 15, 3:27 AM EST | Winter Weather Advisory | GYX | 27 hr |
| Nov 15, 10:06 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 16, 3:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 19, 3:24 PM EST | Winter Weather Advisory | GYX | 30 hr |
| Nov 21, 2:37 PM EST | Snow Squall Warning | GYX | 56 min |
| Nov 21, 3:16 PM EST | Snow Squall Warning | GYX | 42 min |
| Nov 24, 3:02 PM EST | Winter Weather Advisory | GYX | 27 hr |
| Nov 25, 3:26 PM EST | Winter Storm Watch | GYX | 20 hr |
| Nov 26, 3:13 AM EST | Winter Storm Warning | GYX | 40 hr |
| Nov 26, 11:05 AM EST | Winter Weather Advisory | GYX | 28 hr |
| Dec 1, 2:39 AM EST | Winter Weather Advisory | GYX | 35 hr |
| Dec 2, 3:30 PM EST | Dense Fog Advisory | GYX | 20 hr |
| Dec 16, 9:24 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 16, 9:36 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 19, 3:50 PM EST | Flood Watch | GYX | 65 hr |
| Dec 20, 2:38 AM EST | Winter Weather Advisory | GYX | 31 hr |
| Dec 21, 12:45 PM EST | Areal Flood Advisory | GYX | 3 hr |
| Dec 21, 9:07 PM EST | Areal Flood Advisory | GYX | 6 hr |
| Dec 27, 3:30 AM EST | Winter Weather Advisory | GYX | 42 hr |
| Dec 28, 2:59 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 28, 3:01 PM EST | Dense Fog Advisory | GYX | 16 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 archive20172019
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.