Alert archive / New Hampshire / 2021
Weather alerts in New Hampshire, August 2021
35 weather alerts in August 2021, 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 August 2021. Tap one for its archive.
- Alerts
- 35
- Warnings
- 3
- Watches
- 3
- Advisories
- 12
- Busiest day
- August 23, 20215 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 |
|---|---|---|---|---|
| Aug 1, 3:51 AM EDT | Flash Flood Watch | GYX | Cheshire, Coos, Grafton, Hillsborough, Merrimack, Sullivan | 24 hr |
| Aug 1, 7:36 PM EDT | Special Weather Statement | GYX | Sullivan | 24 min |
| Aug 1, 8:03 PM EDT | Special Weather Statement | GYX | Merrimack | 27 min |
| Aug 1, 8:15 PM EDT | Flash Flood Warning | GYX | Belknap, Cheshire, Grafton, Merrimack, Sullivan | 6 hr |
| Aug 7, 7:40 PM EDT | Special Weather Statement | GYX | Grafton | 35 min |
| Aug 8, 2:39 PM EDT | Areal Flood Advisory | GYX | Cheshire | 2 hr |
| Aug 8, 3:19 PM EDT | Areal Flood Advisory | GYX | Cheshire | 94 min |
| Aug 8, 5:10 PM EDT | Areal Flood Advisory | GYX | Carroll, Coos, Grafton | 71 min |
| Aug 8, 8:10 PM EDT | Areal Flood Advisory | GYX | Grafton | 79 min |
| Aug 9, 3:31 PM EDT | Dense Fog Advisory | GYX | Rockingham, Strafford | 15 hr |
| Aug 10, 3:15 AM EDT | Heat Advisory | GYX | Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more | 4 days |
| Aug 10, 2:41 PM EDT | Heat Advisory | GYX | Carroll, Coos, Grafton | 53 hr |
| Aug 11, 4:57 PM EDT | Mesoscale Discussion | SPC | Belknap, Cheshire, Grafton, Hillsborough, Merrimack, Sullivan | 93 min |
| Aug 12, 3:50 PM EDT | Mesoscale Discussion | SPC | Cheshire, Hillsborough, Merrimack, Rockingham, Strafford | 55 min |
| Aug 12, 5:50 PM EDT | Special Weather Statement | GYX | Belknap, Hillsborough, Merrimack, Rockingham, Strafford | 55 min |
| Aug 12, 6:44 PM EDT | Mesoscale Discussion | SPC | Cheshire, Hillsborough, Merrimack, Rockingham | 61 min |
| Aug 14, 5:44 AM EDT | Special Weather Statement | GYX | Coos | 31 min |
| Aug 14, 6:06 AM EDT | Special Weather Statement | GYX | Coos | 39 min |
| Aug 18, 3:02 PM EDT | Flash Flood Watch | GYX | Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more | 31 hr |
| Aug 19, 2:41 PM EDT | Special Weather Statement | GYX | Rockingham | 34 min |
| Aug 19, 3:46 PM EDT | Flash Flood Warning | GYX | Rockingham | 119 min |
| Aug 21, 8:59 PM EDT | Dense Fog Advisory | GYX | Rockingham | 11 hr |
| Aug 22, 3:52 AM EDT | High Surf Advisory | GYX | Rockingham | 23 hr |
| Aug 22, 8:16 AM EDT | Flood Watch | GYX | Cheshire, Hillsborough, Merrimack, Sullivan | 38 hr |
| Aug 22, 4:10 PM EDT | Coastal Flood Statement | GYX | Rockingham | 10 hr |
| Aug 23, 6:06 AM EDT | Dense Fog Advisory | GYX | Rockingham, Strafford | 3 hr |
| Aug 23, 1:52 PM EDT | Special Weather Statement | GYX | Hillsborough | 38 min |
| Aug 23, 2:59 PM EDT | Special Weather Statement | BOX | Hillsborough | 46 min |
| Aug 23, 2:59 PM EDT | Special Weather Statement | GYX | Hillsborough | 46 min |
| Aug 23, 4:07 PM EDT | Special Weather Statement | GYX | Hillsborough | 38 min |
| Aug 23, 8:29 PM EDT | River Flood Warning | GYX | Hillsborough | 116 min |
| Aug 24, 4:22 AM EDT | Areal Flood Advisory | GYX | Strafford | 3 hr |
| Aug 25, 3:13 PM EDT | Heat Advisory | GYX | Belknap, Carroll, Cheshire, Hillsborough, Merrimack, Rockingham and 2 more | 29 hr |
| Aug 30, 3:19 PM EDT | Special Weather Statement | GYX | Grafton | 26 min |
| Aug 30, 5:08 PM EDT | Special Weather Statement | GYX | Carroll | 37 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 | 3 |
| Special Weather Statement | 13 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 5 |
| Heat | |
| Heat Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| High Surf Advisory | 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 archive20202022
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. Rebuilt daily.