Alert archive / Hawaii / Kauai County
Weather alerts in Kauai County, Hawaii, 2020
114 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Kauai County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 114
- Warnings
- 30
- Watches
- 12
- Advisories
- 68
- Busiest month
- March38 alerts
- Busiest day
- March 17, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Kauai County in 2020 had a tornado report inside them.
Kauai County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 7 | 0 | 100% | 0 | ||
| Flash flood warnings | 10 | 4 | 60% | 12 | 100% | 231 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Honolulu, HI: tornado warnings | 2 | 0 | 100% | 0 | ||
| NWS Honolulu, HI: severe thunderstorm warnings | 7 | 0 | 100% | 0 | ||
| NWS Honolulu, HI: flash flood warnings | 25 | 7 | 72% | 23 | 83% | 215 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 | Lasted |
|---|---|---|---|
| Jan 1, 3:30 AM HST | High Surf Advisory | HFO | 24 hr |
| Jan 5, 9:17 AM HST | Wind Advisory | HFO | 6 days |
| Jan 7, 3:43 PM HST | Flash Flood Watch | HFO | 6 days |
| Jan 10, 3:44 AM HST | Severe Thunderstorm Watch | SPC | 67 days |
| Jan 10, 11:30 AM HST | Severe Thunderstorm Watch | SPC | 68 days |
| Jan 11, 12:43 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Jan 11, 1:58 PM HST | Areal Flood Advisory | HFO | 6 hr |
| Jan 17, 3:26 PM HST | High Surf Advisory | HFO | 12 hr |
| Jan 19, 3:01 PM HST | High Surf Advisory | HFO | 25 hr |
| Jan 21, 3:47 PM HST | High Surf Warning | HFO | 47 hr |
| Jan 23, 2:58 PM HST | High Surf Advisory | HFO | 13 hr |
| Jan 24, 4:05 PM HST | High Surf Warning | HFO | 47 hr |
| Jan 25, 4:16 AM HST | High Surf Advisory | HFO | 71 hr |
| Jan 28, 3:33 PM HST | High Surf Advisory | HFO | 4 days |
| Feb 5, 7:56 AM HST | Areal Flood Advisory | HFO | 84 min |
| Feb 5, 3:17 PM HST | High Surf Advisory | HFO | 4 days |
| Feb 6, 12:41 AM HST | Flash Flood Warning | HFO | 6 hr |
| Feb 6, 5:20 AM HST | Flash Flood Warning | HFO | 9 hr |
| Feb 7, 9:29 PM HST | Areal Flood Advisory | HFO | 3 hr |
| Feb 9, 3:25 AM HST | Wind Advisory | HFO | 36 hr |
| Feb 9, 3:35 PM HST | High Surf Warning | HFO | 42 hr |
| Feb 10, 6:01 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Feb 11, 9:27 AM HST | High Surf Advisory | HFO | 18 hr |
| Feb 18, 3:44 AM HST | Wind Advisory | HFO | 72 hr |
| Feb 24, 3:32 PM HST | High Surf Advisory | HFO | 48 hr |
| Feb 25, 3:45 PM HST | High Surf Warning | HFO | 12 hr |
| Feb 27, 3:12 PM HST | High Surf Advisory | HFO | 6 days |
| Feb 28, 6:31 PM HST | Wind Advisory | HFO | 57 hr |
| Mar 6, 2:20 PM HST | Wind Advisory | HFO | 54 hr |
| Mar 11, 3:17 PM HST | High Surf Advisory | HFO | 60 hr |
| Mar 13, 3:34 PM HST | Flash Flood Watch | HFO | 6 days |
| Mar 16, 3:22 AM HST | High Surf Advisory | HFO | 36 hr |
| Mar 16, 4:37 AM HST | Areal Flood Advisory | HFO | 9 hr |
| Mar 16, 5:24 AM HST | Special Weather Statement | HFO | 111 min |
| Mar 16, 11:49 AM HST | Flash Flood Warning | HFO | 6 hr |
| Mar 16, 12:24 PM HST | Special Weather Statement | HFO | 21 min |
| Mar 16, 8:09 PM HST | Special Weather Statement | HFO | 51 min |
| Mar 16, 8:30 PM HST | Areal Flood Advisory | HFO | 3 hr |
| Mar 16, 9:08 PM HST | Severe Thunderstorm Warning | HFO | 42 min |
| Mar 16, 9:44 PM HST | Flash Flood Warning | HFO | 18 hr |
| Mar 17, 1:22 AM HST | Tornado Warning | HFO | 23 min |
| Mar 17, 2:30 AM HST | Areal Flood Advisory | HFO | 6 hr |
| Mar 17, 5:14 AM HST | Severe Thunderstorm Warning | HFO | 46 min |
| Mar 17, 5:49 AM HST | Tornado Warning | HFO | 26 min |
| Mar 18, 9:11 AM HST | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 18, 9:53 AM HST | Severe Thunderstorm Warning | HFO | 22 min |
| Mar 18, 10:35 AM HST | Special Weather Statement | HFO | 25 min |
| Mar 18, 10:49 AM HST | Severe Thunderstorm Warning | HFO | 26 min |
| Mar 18, 11:09 AM HST | Severe Thunderstorm Warning | HFO | 21 min |
| Mar 18, 11:20 AM HST | Areal Flood Advisory | HFO | 86 min |
| Mar 18, 11:26 AM HST | Severe Thunderstorm Warning | HFO | 34 min |
| Mar 18, 3:35 PM HST | Areal Flood Advisory | HFO | 99 min |
| Mar 20, 3:30 PM HST | High Surf Advisory | HFO | 12 hr |
| Mar 21, 4:43 PM HST | Areal Flood Advisory | HFO | 3 hr |
| Mar 22, 3:17 PM HST | Wind Advisory | HFO | 4 days |
| Mar 23, 3:31 PM HST | High Surf Advisory | HFO | 6 days |
| Mar 24, 4:59 PM HST | Tsunami Watch | HEB | 54 min |
| Mar 27, 3:23 PM HST | Flash Flood Watch | HFO | 48 hr |
| Mar 28, 12:01 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Mar 28, 12:28 AM HST | Flash Flood Warning | HFO | 3 hr |
| Mar 28, 1:00 AM HST | Flash Flood Warning | HFO | 3 hr |
| Mar 28, 2:34 AM HST | Severe Thunderstorm Warning | HFO | 56 min |
| Mar 28, 2:57 AM HST | Flash Flood Warning | HFO | 3 hr |
| Mar 28, 3:28 AM HST | Flash Flood Warning | HFO | 3 hr |
| Mar 28, 6:29 AM HST | Flash Flood Warning | HFO | 6 hr |
| Mar 29, 3:57 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Apr 6, 4:15 AM HST | Areal Flood Advisory | HFO | 75 min |
| Apr 6, 8:27 AM HST | Areal Flood Advisory | HFO | 63 min |
| Apr 10, 3:22 AM HST | High Surf Advisory | HFO | 12 hr |
| Apr 14, 3:00 AM HST | Flash Flood Watch | HFO | 24 hr |
| Apr 14, 3:31 PM HST | High Surf Advisory | HFO | 24 hr |
| Apr 15, 3:27 PM HST | High Surf Warning | HFO | 12 hr |
| Apr 15, 3:27 PM HST | High Surf Advisory | HFO | 24 hr |
| Apr 18, 3:22 AM HST | High Surf Advisory | HFO | 48 hr |
| Apr 21, 4:39 PM HST | High Surf Advisory | HFO | 71 hr |
| May 7, 2:51 AM HST | Areal Flood Advisory | HFO | 5 hr |
| May 14, 1:54 PM HST | Areal Flood Advisory | HFO | 3 hr |
| May 15, 4:00 AM HST | High Surf Advisory | HFO | 47 hr |
| May 17, 8:19 PM HST | High Surf Advisory | HFO | 31 hr |
| Jun 2, 3:33 AM HST | High Surf Advisory | HFO | 3 days |
| Jun 27, 3:19 PM HST | High Surf Advisory | HFO | 60 hr |
| Jul 5, 6:38 PM HST | Areal Flood Advisory | HFO | 2 hr |
| Jul 24, 11:28 AM HST | Flash Flood Watch | HFO | 3 days |
| Jul 24, 11:13 PM HST | Hurricane Warning | HFO | 59 hr |
| Jul 24, 11:13 PM HST | Tropical Storm Warning | HFO | 39 hr |
| Jul 25, 4:42 AM HST | Tropical Storm Watch | HFO | 12 hr |
| Jul 26, 4:40 AM HST | High Surf Advisory | HFO | 24 hr |
| Jul 26, 10:12 PM HST | Areal Flood Advisory | HFO | 3 hr |
| Jul 27, 12:56 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Oct 3, 1:14 PM HST | Areal Flood Advisory | HFO | 3 hr |
| Oct 17, 6:19 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Oct 17, 9:32 AM HST | Flash Flood Watch | HFO | 28 hr |
| Oct 19, 4:38 PM HST | Tsunami Advisory | HEB | 21 days |
| Oct 23, 10:28 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Oct 24, 8:06 PM HST | High Surf Advisory | HFO | 31 hr |
| Oct 26, 3:42 AM HST | Flash Flood Watch | HFO | 60 hr |
| Oct 26, 2:07 PM HST | Areal Flood Advisory | HFO | 3 hr |
| Oct 27, 5:01 PM HST | Areal Flood Advisory | HFO | 60 min |
| Nov 4, 11:34 AM HST | Areal Flood Advisory | HFO | 9 hr |
| Nov 4, 8:21 PM HST | Areal Flood Advisory | HFO | 2 hr |
| Nov 18, 8:42 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Nov 24, 5:27 AM HST | Areal Flood Advisory | HFO | 6 hr |
| Nov 25, 7:43 AM HST | Areal Flood Advisory | HFO | 68 min |
| Nov 25, 8:51 AM HST | Flash Flood Warning | HFO | 8 hr |
| Nov 30, 3:28 PM HST | High Surf Warning | HFO | 69 hr |
| Dec 3, 12:48 PM HST | High Surf Advisory | HFO | 15 hr |
| Dec 5, 3:30 PM HST | High Surf Warning | HFO | 40 hr |
| Dec 7, 7:31 AM HST | High Surf Advisory | HFO | 44 hr |
| Dec 16, 3:30 PM HST | High Surf Advisory | HFO | 44 hr |
| Dec 22, 4:02 PM HST | High Surf Advisory | HFO | 59 hr |
| Dec 26, 1:50 PM HST | Wind Advisory | HFO | 12 hr |
| Dec 28, 3:33 AM HST | High Surf Warning | HFO | 36 hr |
| Dec 28, 3:33 AM HST | High Surf Advisory | HFO | 53 hr |
| Dec 30, 6:26 AM HST | High Surf Warning | HFO | 69 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 | 7 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 3 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Warning | 10 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 30 |
| Wind and dust | |
| Wind Advisory | 7 |
| Tropical | |
| Hurricane Warning | 1 |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| High Surf Warning | 9 |
| Tsunami Watch | 1 |
| High Surf Advisory | 30 |
| Tsunami Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe 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.