Alert archive / Hawaii / Flash Flood Watches
Flash Flood Watches in Hawaii, 2021
10 flash flood watches 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 watches reaches back to 2005.
Flash Flood Watches by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Flash Flood Watches
- 10
- Busiest month
- March4 flash flood watches
- Busiest day
- January 17, 20211 flash flood watches
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Hawaii-Aleutian Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 17, 3:04 AM HST | Flash Flood Watch | HFO | Hawaii, Honolulu, Kauai, Kalawao | 3 days |
| Jan 24, 8:46 AM HST | Flash Flood Watch | HFO | Hawaii, Honolulu, Kauai, Kalawao | 55 hr |
| Feb 16, 9:30 AM HST | Flash Flood Watch | HFO | Honolulu, Kauai, Kalawao | 66 hr |
| Feb 26, 8:27 AM HST | Flash Flood Watch | HFO | Hawaii, Kalawao | 67 hr |
| Mar 6, 1:05 PM HST | Flash Flood Watch | HFO | Kauai | 15 hr |
| Mar 7, 11:20 AM HST | Flash Flood Watch | HFO | Hawaii, Honolulu, Kauai, Kalawao | 8 days |
| Mar 29, 12:32 PM HST | Flash Flood Watch | HFO | Kauai | 20 hr |
| Mar 30, 9:05 AM HST | Flash Flood Watch | HFO | Kauai | 6 hr |
| May 5, 9:17 AM HST | Flash Flood Watch | HFO | Hawaii, Honolulu, Kauai, Kalawao | 54 hr |
| Aug 20, 2:39 PM HST | Flash Flood Watch | HFO | Hawaii, Honolulu, Kauai, Kalawao | 4 days |
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.