Alert archive / New Hampshire / 2023
Weather alerts in New Hampshire, September 2023
63 weather alerts in September 2023, 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 2023. Tap one for its archive.
- Alerts
- 63
- Warnings
- 29
- Watches
- 4
- Advisories
- 13
- Busiest day
- September 8, 202333 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 4, 7:08 AM EDT | Dense Fog Advisory | GYX | Carroll, Cheshire, Coos, Grafton, Sullivan | 112 min |
| Sep 4, 3:27 PM EDT | Heat Advisory | GYX | Cheshire, Hillsborough, Merrimack, Rockingham, Sullivan | 3 days |
| Sep 6, 3:11 PM EDT | Heat Advisory | GYX | Belknap, Carroll, Grafton, Strafford | 27 hr |
| Sep 7, 5:24 PM EDT | Special Weather Statement | GYX | Coos | 36 min |
| Sep 7, 5:31 PM EDT | Severe Thunderstorm Warning | GYX | Coos | 44 min |
| Sep 7, 9:16 PM EDT | Mesoscale Discussion | SPC | Cheshire, Sullivan | 59 min |
| Sep 7, 9:49 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire | 41 min |
| Sep 7, 10:18 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire, Coos, Grafton, Merrimack, Sullivan | 57 min |
| Sep 7, 10:32 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire, Hillsborough, Merrimack, Sullivan | 25 min |
| Sep 7, 11:09 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll, Coos, Grafton, Merrimack | 51 min |
| Sep 7, 11:43 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll, Coos, Grafton, Merrimack | 13 min |
| Sep 7, 11:55 PM EDT | Special Weather Statement | GYX | Carroll | 35 min |
| Sep 8, 2:28 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Rockingham | 62 min |
| Sep 8, 2:46 PM EDT | Mesoscale Discussion | SPC | Belknap, Carroll, Cheshire, Hillsborough, Merrimack, Rockingham and 2 more | 119 min |
| Sep 8, 3:10 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Rockingham | 65 min |
| Sep 8, 3:19 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Merrimack, Rockingham, Strafford | 36 min |
| Sep 8, 3:22 PM EDT | Special Weather Statement | GYX | Belknap | 23 min |
| Sep 8, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more | 7 hr |
| Sep 8, 3:44 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire | 46 min |
| Sep 8, 3:47 PM EDT | Severe Thunderstorm Warning | GYX | Rockingham, Strafford | 43 min |
| Sep 8, 4:01 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll, Merrimack, Strafford | 44 min |
| Sep 8, 4:09 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire | 51 min |
| Sep 8, 4:24 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 36 min |
| Sep 8, 4:50 PM EDT | Severe Thunderstorm Warning | GYX | Carroll | 40 min |
| Sep 8, 4:52 PM EDT | Mesoscale Discussion | SPC | Belknap, Cheshire, Hillsborough, Merrimack, Strafford, Sullivan | 83 min |
| Sep 8, 4:58 PM EDT | Flash Flood Warning | GYX | Cheshire | 3 hr |
| Sep 8, 5:05 PM EDT | Special Weather Statement | BTV | Sullivan | 55 min |
| Sep 8, 5:10 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 50 min |
| Sep 8, 5:12 PM EDT | Flash Flood Warning | GYX | Sullivan | 3 hr |
| Sep 8, 5:50 PM EDT | Special Weather Statement | GYX | Grafton | 25 min |
| Sep 8, 5:54 PM EDT | Severe Thunderstorm Warning | GYX | Carroll, Grafton | 36 min |
| Sep 8, 6:03 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire | 42 min |
| Sep 8, 6:11 PM EDT | Special Weather Statement | GYX | Grafton | 34 min |
| Sep 8, 6:37 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire, Hillsborough, Merrimack | 38 min |
| Sep 8, 6:47 PM EDT | Mesoscale Discussion | SPC | Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more | 88 min |
| Sep 8, 6:54 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Merrimack, Rockingham, Strafford | 51 min |
| Sep 8, 7:31 PM EDT | Flash Flood Warning | GYX | Merrimack, Rockingham | 3 hr |
| Sep 8, 7:50 PM EDT | Special Weather Statement | GYX | Rockingham, Strafford | 55 min |
| Sep 9, 5:46 PM EDT | Special Weather Statement | GYX | Rockingham | 29 min |
| Sep 9, 5:49 PM EDT | Special Weather Statement | GYX | Cheshire | 26 min |
| Sep 9, 6:49 PM EDT | Areal Flood Advisory | GYX | Rockingham | 116 min |
| Sep 10, 4:52 PM EDT | Areal Flood Advisory | GYX | Cheshire | 3 hr |
| Sep 11, 5:37 PM EDT | Flash Flood Warning | GYX | Carroll | 113 min |
| Sep 11, 6:17 PM EDT | Flash Flood Warning | GYX | Hillsborough, Rockingham | 3 hr |
| Sep 11, 7:44 PM EDT | Areal Flood Advisory | GYX | Cheshire, Hillsborough, Merrimack, Rockingham | 106 min |
| Sep 11, 9:22 PM EDT | Areal Flood Warning | GYX | Hillsborough, Rockingham | 3 hr |
| Sep 11, 9:58 PM EDT | River Flood Warning | BOX | Hillsborough | 17 hr |
| Sep 12, 3:11 PM EDT | Flood Watch | GYX | Cheshire, Hillsborough, Rockingham | 27 hr |
| Sep 13, 3:25 PM EDT | Rip Current Statement | GYX | Rockingham | 27 hr |
| Sep 13, 5:12 PM EDT | Tropical Storm Watch | GYX | Rockingham | 25 hr |
| Sep 14, 4:02 PM EDT | High Surf Advisory | GYX | Rockingham | 26 hr |
| Sep 14, 5:38 PM EDT | Tropical Storm Warning | GYX | Rockingham | 50 hr |
| Sep 15, 9:33 AM EDT | Coastal Flood Advisory | GYX | Rockingham | 28 hr |
| Sep 15, 11:24 AM EDT | Wind Advisory | GYX | Carroll, Coos, Grafton | 30 hr |
| Sep 16, 8:17 PM EDT | High Surf Advisory | GYX | Rockingham | 7 hr |
| Sep 17, 3:06 AM EDT | Rip Current Statement | GYX | Rockingham | 12 hr |
| Sep 18, 3:28 AM EDT | Flood Watch | GYX | Belknap, Carroll, Coos, Grafton, Hillsborough, Merrimack and 2 more | 30 hr |
| Sep 19, 1:26 AM EDT | Areal Flood Warning | GYX | Carroll, Coos | 6 hr |
| Sep 19, 1:26 AM EDT | Areal Flood Advisory | GYX | Rockingham, Strafford | 4 hr |
| Sep 21, 7:13 AM EDT | Rip Current Statement | GYX | Rockingham | 12 hr |
| Sep 27, 2:49 PM EDT | Frost Advisory | GYX | Coos | 18 hr |
| Sep 29, 6:26 AM EDT | Dense Fog Advisory | GYX | Belknap, Carroll, Coos, Grafton, Strafford | 3 hr |
| Sep 29, 3:51 PM EDT | Coastal Flood Statement | GYX | Rockingham | 10 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 | 20 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 9 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 5 |
| River Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| Coastal Flood Advisory | 1 |
| High Surf Advisory | 2 |
| Coastal Flood Statement | 1 |
| Rip Current 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 archive20222024
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.