Alert archive / New Hampshire / 2020
Weather alerts in New Hampshire, September 2020
28 weather alerts in September 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 September 2020. Tap one for its archive.
- Alerts
- 28
- Warnings
- 5
- Watches
- 3
- Advisories
- 15
- Busiest day
- September 21, 20204 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 |
|---|---|---|---|---|
| Sep 9, 7:05 AM EDT | Dense Fog Advisory | GYX | Carroll, Coos, Rockingham, Strafford | 3 hr |
| Sep 9, 2:37 PM EDT | Dense Fog Advisory | GYX | Rockingham, Strafford | 19 hr |
| Sep 11, 1:16 PM EDT | Frost Advisory | GYX | Carroll, Coos, Grafton | 19 hr |
| Sep 13, 2:48 PM EDT | Freeze Watch | GYX | Coos | 25 hr |
| Sep 14, 3:25 AM EDT | Frost Advisory | GYX | Carroll, Grafton | 30 hr |
| Sep 14, 3:25 AM EDT | Freeze Warning | GYX | Coos | 30 hr |
| Sep 14, 3:33 AM EDT | High Surf Advisory | GYX | Rockingham | 43 hr |
| Sep 18, 2:44 PM EDT | Frost Advisory | GYX | Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 1 more | 16 hr |
| Sep 18, 2:44 PM EDT | Freeze Warning | GYX | Carroll, Grafton | 16 hr |
| Sep 19, 3:02 PM EDT | Frost Advisory | GYX | Hillsborough, Rockingham, Strafford | 16 hr |
| Sep 19, 3:02 PM EDT | Freeze Warning | GYX | Belknap, Carroll, Cheshire, Hillsborough, Merrimack, Sullivan | 16 hr |
| Sep 19, 3:17 PM EDT | Coastal Flood Statement | GYX | Rockingham | 24 hr |
| Sep 20, 3:13 PM EDT | High Surf Advisory | GYX | Rockingham | 27 hr |
| Sep 20, 3:17 PM EDT | Frost Advisory | GYX | Hillsborough, Rockingham | 18 hr |
| Sep 21, 10:58 AM EDT | Coastal Flood Advisory | GYX | Rockingham | 7 hr |
| Sep 21, 3:16 PM EDT | Fire Weather Watch | GYX | 14 hr | |
| Sep 21, 3:18 PM EDT | Frost Advisory | GYX | Hillsborough, Rockingham | 14 hr |
| Sep 21, 3:38 PM EDT | Coastal Flood Watch | GYX | Rockingham | 13 hr |
| Sep 22, 3:56 AM EDT | Red Flag Warning | GYX | 15 hr | |
| Sep 22, 4:13 AM EDT | Coastal Flood Warning | GYX | Rockingham | 25 hr |
| Sep 23, 5:42 AM EDT | Coastal Flood Advisory | GYX | Rockingham | 9 hr |
| Sep 23, 3:06 PM EDT | High Surf Advisory | GYX | Rockingham | 5 hr |
| Sep 25, 2:47 PM EDT | Beach Hazards Statement | GYX | Rockingham | 28 hr |
| Sep 26, 4:40 AM EDT | Dense Fog Advisory | GYX | Cheshire, Hillsborough, Merrimack, Rockingham, Strafford, Sullivan | 4 hr |
| Sep 29, 3:04 PM EDT | Wind Advisory | GYX | Belknap, Carroll, Hillsborough, Merrimack, Rockingham, Strafford | 23 hr |
| Sep 30, 5:09 AM EDT | Mesoscale Discussion | SPC | Cheshire, Hillsborough, Rockingham | 96 min |
| Sep 30, 5:56 AM EDT | Special Weather Statement | GYX | Cheshire, Sullivan | 64 min |
| Sep 30, 6:42 AM EDT | Special Weather Statement | GYX | Coos, Grafton | 63 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 | 1 |
| Special Weather Statement | 2 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 6 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Watch | 1 |
| Coastal Flood Advisory | 2 |
| High Surf Advisory | 3 |
| Beach Hazards Statement | 1 |
| Coastal Flood Statement | 1 |
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.