Alert archive / New Hampshire / Flash Flood Warnings
Flash Flood Warnings in New Hampshire, 2021
14 flash flood warnings in 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Flash Flood Warnings
- 14
- Busiest month
- July9 flash flood warnings
- Busiest day
- July 30, 20214 flash flood warnings
Over time
By month
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 |
|---|---|---|---|---|
| Jun 8, 3:14 PM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough | 2 hr |
| Jun 8, 3:30 PM EDT | Flash Flood Warning | GYX | Hillsborough | 2 hr |
| Jun 8, 3:53 PM EDT | Flash Flood Warning | GYX | Cheshire | 5 hr |
| Jul 9, 1:01 PM EDT | Flash Flood Warning | GYX | Hillsborough, Merrimack, Rockingham, Strafford | 4 hr |
| Jul 9, 1:10 PM EDT | Flash Flood Warning | GYX | Strafford | 4 hr |
| Jul 17, 7:45 PM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough | 3 hr |
| Jul 18, 12:01 AM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough | 4 hr |
| Jul 18, 9:01 PM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough | 3 hr |
| Jul 29, 8:35 PM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough, Merrimack, Sullivan | 6 hr |
| Jul 29, 9:33 PM EDT | Flash Flood Warning | GYX | Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more | 5 hr |
| Jul 29, 10:32 PM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough | 3 hr |
| Jul 29, 10:58 PM EDT | Flash Flood Warning | GYX | Hillsborough, Rockingham | 3 hr |
| Aug 1, 8:15 PM EDT | Flash Flood Warning | GYX | Belknap, Cheshire, Grafton, Merrimack, Sullivan | 6 hr |
| Aug 19, 3:46 PM EDT | Flash Flood Warning | GYX | Rockingham | 119 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
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.