Alert archive / New Hampshire / 2020
Weather alerts in New Hampshire, December 2020
44 weather alerts in December 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in December 2020. Tap one for its archive.
- Alerts
- 44
- Warnings
- 18
- Watches
- 4
- Advisories
- 9
- Busiest day
- December 25, 20209 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 8:26 PM EST | Flash Flood Warning | GYX | Cheshire, Hillsborough, Sullivan | 3 hr |
| Nov 30, 8:44 PM EST | Flash Flood Warning | GYX | Carroll, Coos, Grafton | 6 hr |
| Nov 30, 9:36 PM EST | River Flood Warning | GYX | Grafton | 9 hr |
| Dec 1, 1:25 AM EST | River Flood Warning | GYX | Carroll | 13 hr |
| Dec 1, 3:17 AM EST | Coastal Flood Advisory | GYX | Rockingham | 11 hr |
| Dec 1, 7:34 AM EST | River Flood Warning | GYX | Grafton | 6 hr |
| Dec 3, 3:57 PM EST | Winter Storm Watch | GYX | Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more | 36 hr |
| Dec 4, 4:06 PM EST | Winter Storm Warning | GYX | Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more | 42 hr |
| Dec 5, 7:52 AM EST | Mesoscale Discussion | SPC | Belknap, Carroll, Cheshire, Hillsborough, Merrimack, Strafford | 4 hr |
| Dec 5, 11:57 AM EST | Mesoscale Discussion | SPC | Belknap, Carroll, Coos, Hillsborough, Merrimack | 6 hr |
| Dec 5, 2:16 PM EST | Special Weather Statement | GYX | Belknap, Carroll, Hillsborough, Merrimack | 3 hr |
| Dec 12, 3:10 AM EST | Winter Weather Advisory | GYX | Carroll, Coos, Grafton | 24 hr |
| Dec 13, 6:10 AM EST | Dense Fog Advisory | GYX | Belknap, Cheshire, Hillsborough, Merrimack, Rockingham, Strafford and 1 more | 5 hr |
| Dec 13, 12:57 PM EST | Dense Fog Advisory | GYX | Belknap, Carroll, Hillsborough, Merrimack, Rockingham, Strafford | 3 hr |
| Dec 13, 4:05 PM EST | Coastal Flood Statement | GYX | Rockingham | 19 hr |
| Dec 15, 4:04 PM EST | Winter Storm Watch | GYX | Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more | 11 hr |
| Dec 16, 3:28 AM EST | Winter Storm Warning | GYX | Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more | 39 hr |
| Dec 16, 3:28 AM EST | Winter Weather Advisory | GYX | Carroll, Grafton | 30 hr |
| Dec 16, 2:51 PM EST | Coastal Flood Statement | GYX | Rockingham | 18 hr |
| Dec 16, 10:12 PM EST | Mesoscale Discussion | SPC | Cheshire, Hillsborough, Merrimack, Rockingham, Sullivan | 6 hr |
| Dec 17, 4:33 AM EST | Mesoscale Discussion | SPC | Belknap, Cheshire, Hillsborough, Merrimack, Rockingham, Strafford and 1 more | 6 hr |
| Dec 17, 8:30 AM EST | Coastal Flood Advisory | GYX | Rockingham | 7 hr |
| Dec 17, 9:18 AM EST | Special Weather Statement | GYX | Belknap, Carroll, Merrimack | 57 min |
| Dec 17, 10:05 AM EST | Mesoscale Discussion | SPC | Belknap, Carroll, Cheshire, Hillsborough, Merrimack, Rockingham and 2 more | 4 hr |
| Dec 17, 10:26 AM EST | Special Weather Statement | GYX | Belknap, Carroll, Cheshire, Merrimack, Strafford, Sullivan | 64 min |
| Dec 17, 10:48 AM EST | Winter Weather Advisory | GYX | Coos | 5 hr |
| Dec 17, 11:44 AM EST | Special Weather Statement | GYX | Belknap, Carroll, Merrimack | 91 min |
| Dec 18, 9:57 AM EST | Coastal Flood Statement | GYX | Rockingham | 5 hr |
| Dec 20, 11:51 PM EST | Dense Fog Advisory | GYX | Belknap, Cheshire, Hillsborough, Merrimack, Rockingham, Strafford | 9 hr |
| Dec 22, 3:37 PM EST | High Wind Watch | GYX | Hillsborough, Rockingham, Strafford | 48 hr |
| Dec 23, 1:50 PM EST | Flood Watch | GYX | Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more | 60 hr |
| Dec 24, 9:33 AM EST | High Wind Warning | GYX | Rockingham | 30 hr |
| Dec 24, 3:39 PM EST | Wind Advisory | GYX | Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more | 24 hr |
| Dec 24, 9:33 PM EST | River Flood Warning | GYX | Carroll | 50 hr |
| Dec 24, 9:33 PM EST | River Flood Warning | GYX | Grafton | 38 hr |
| Dec 24, 9:33 PM EST | River Flood Warning | GYX | Grafton | 41 hr |
| Dec 24, 9:33 PM EST | River Flood Warning | GYX | Merrimack | 3 days |
| Dec 25, 6:15 AM EST | Areal Flood Warning | GYX | Carroll, Coos, Grafton | 6 hr |
| Dec 25, 6:42 AM EST | River Flood Warning | GYX | Grafton | 11 hr |
| Dec 25, 12:03 PM EST | River Flood Warning | GYX | Grafton | 4 hr |
| Dec 25, 12:03 PM EST | River Flood Warning | GYX | Sullivan | 6 hr |
| Dec 25, 2:58 PM EST | Areal Flood Warning | GYX | Cheshire, Hillsborough, Merrimack, Sullivan | 4 hr |
| Dec 26, 4:46 AM EST | River Flood Warning | GYX | Merrimack | 10 hr |
| Dec 28, 11:48 AM EST | Special Weather Statement | GYX | Carroll | 42 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 5 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 2 |
| River Flood Warning | 11 |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Coastal Flood Advisory | 2 |
| Coastal Flood Statement | 3 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.