Alert archive / Hawaii / Kauai County
Weather alerts in Kauai County, Hawaii, 2009
92 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 92
- Warnings
- 23
- Watches
- 10
- Advisories
- 59
- Busiest month
- November17 alerts
- Busiest day
- November 26, 20094 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Kauai County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 15 | 3 | 80% | 4 | 100% | 214 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Honolulu, HI: tornado warnings | 0 | 1 | 0% | |||
| NWS Honolulu, HI: severe thunderstorm warnings | 2 | 0 | 100% | 1 | 0% | |
| NWS Honolulu, HI: flash flood warnings | 29 | 4 | 86% | 8 | 100% | 144 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, 2:29 AM HST | Flash Flood Warning | HFO | 2 hr |
| Jan 7, 3:34 AM HST | High Surf Advisory | HFO | 12 hr |
| Jan 10, 3:35 PM HST | High Surf Advisory | HFO | 60 hr |
| Jan 10, 11:28 PM HST | Flash Flood Warning | HFO | 96 min |
| Jan 13, 10:15 AM HST | High Surf Warning | HFO | 5 days |
| Jan 14, 3:55 PM HST | High Wind Watch | HFO | 24 hr |
| Jan 14, 8:04 PM HST | High Wind Warning | HFO | 4 days |
| Jan 18, 3:34 AM HST | High Surf Advisory | HFO | 36 hr |
| Jan 20, 3:18 AM HST | High Surf Advisory | HFO | 60 hr |
| Jan 23, 8:09 AM HST | High Surf Advisory | HFO | 43 hr |
| Jan 26, 6:38 PM HST | Areal Flood Advisory | HFO | 3 hr |
| Feb 3, 3:35 AM HST | High Surf Advisory | HFO | 30 hr |
| Feb 5, 3:18 PM HST | High Surf Advisory | HFO | 45 hr |
| Feb 11, 7:42 AM HST | High Surf Advisory | HFO | 7 hr |
| Feb 11, 3:09 PM HST | High Wind Watch | HFO | 36 hr |
| Feb 13, 3:35 AM HST | Wind Advisory | HFO | 48 hr |
| Feb 13, 3:52 PM HST | High Surf Advisory | HFO | 4 days |
| Feb 19, 3:52 PM HST | High Surf Advisory | HFO | 14 days |
| Feb 27, 12:01 PM HST | Wind Advisory | HFO | 5 days |
| Mar 7, 10:59 AM HST | Areal Flood Advisory | HFO | 5 hr |
| Mar 8, 11:00 PM HST | Flash Flood Warning | HFO | 5 hr |
| Mar 9, 4:01 AM HST | Flash Flood Warning | HFO | 3 hr |
| Mar 9, 7:22 AM HST | High Surf Advisory | HFO | 32 hr |
| Mar 12, 3:36 PM HST | High Surf Advisory | HFO | 65 hr |
| Mar 13, 3:26 PM HST | High Surf Warning | HFO | 24 hr |
| Mar 23, 3:04 PM HST | High Surf Advisory | HFO | 5 days |
| Mar 31, 3:18 AM HST | High Surf Advisory | HFO | 60 hr |
| Apr 6, 3:29 AM HST | High Surf Advisory | HFO | 45 hr |
| Apr 19, 12:34 PM HST | Areal Flood Advisory | HFO | 5 hr |
| Apr 20, 12:12 PM HST | Areal Flood Advisory | HFO | 2 hr |
| Apr 22, 3:40 AM HST | Flash Flood Watch | HFO | 60 hr |
| Jun 7, 3:30 PM HST | High Surf Advisory | HFO | 4 days |
| Jun 13, 2:59 PM HST | High Surf Advisory | HFO | 5 days |
| Jun 24, 6:30 AM HST | High Surf Advisory | HFO | 4 days |
| Jun 30, 3:31 PM HST | High Surf Advisory | HFO | 72 hr |
| Jul 21, 3:35 PM HST | High Surf Advisory | HFO | 72 hr |
| Jul 23, 9:15 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Jul 23, 9:47 AM HST | Flash Flood Warning | HFO | 3 hr |
| Jul 23, 12:46 PM HST | Flash Flood Warning | HFO | 6 hr |
| Jul 23, 6:40 PM HST | Flash Flood Warning | HFO | 30 min |
| Jul 25, 3:34 PM HST | High Surf Advisory | HFO | 48 hr |
| Jul 30, 3:33 PM HST | High Surf Advisory | HFO | 4 days |
| Aug 8, 3:34 PM HST | Flash Flood Watch | HFO | 71 hr |
| Aug 9, 9:30 AM HST | High Surf Warning | HFO | 50 hr |
| Aug 9, 4:45 PM HST | High Surf Advisory | HFO | 22 hr |
| Aug 9, 5:00 PM HST | Tropical Storm Watch | HFO | 6 days |
| Aug 9, 11:00 PM HST | Tropical Storm Watch | HFO | 7 days |
| Aug 11, 11:48 AM HST | High Surf Advisory | HFO | 16 hr |
| Aug 12, 8:15 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Aug 12, 9:52 AM HST | Flash Flood Watch | HFO | 30 hr |
| Aug 13, 6:55 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Aug 13, 9:53 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Aug 13, 12:47 PM HST | Areal Flood Advisory | HFO | 58 min |
| Aug 14, 6:36 AM HST | Flash Flood Warning | HFO | 114 min |
| Aug 17, 3:31 PM HST | High Surf Advisory | HFO | 48 hr |
| Aug 18, 8:46 AM HST | Flash Flood Watch | HFO | 31 hr |
| Sep 10, 9:07 AM HST | High Surf Advisory | HFO | 54 hr |
| Sep 24, 9:21 AM HST | High Surf Advisory | HFO | 50 hr |
| Oct 5, 12:26 AM HST | Flash Flood Warning | HFO | 2 hr |
| Oct 5, 3:37 AM HST | Flash Flood Watch | HFO | 36 hr |
| Oct 16, 2:59 PM HST | High Surf Advisory | HFO | 60 hr |
| Oct 28, 3:12 PM HST | High Surf Advisory | HFO | 36 hr |
| Oct 30, 3:21 PM HST | High Surf Advisory | HFO | 72 hr |
| Nov 3, 11:04 AM HST | High Surf Advisory | HFO | 16 hr |
| Nov 9, 3:38 PM HST | Flash Flood Watch | HFO | 5 days |
| Nov 10, 3:18 PM HST | Wind Advisory | HFO | 43 hr |
| Nov 11, 10:52 AM HST | High Surf Advisory | HFO | 8 days |
| Nov 13, 3:20 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Nov 13, 3:36 AM HST | Flash Flood Warning | HFO | 4 hr |
| Nov 13, 9:10 PM HST | Areal Flood Advisory | HFO | 8 hr |
| Nov 14, 6:41 AM HST | Areal Flood Advisory | HFO | 3 hr |
| Nov 14, 7:56 AM HST | Flash Flood Warning | HFO | 9 hr |
| Nov 14, 4:46 PM HST | Flash Flood Warning | HFO | 13 hr |
| Nov 21, 3:29 PM HST | High Surf Advisory | HFO | 52 hr |
| Nov 24, 3:30 PM HST | High Surf Warning | HFO | 41 hr |
| Nov 26, 3:54 AM HST | Areal Flood Advisory | HFO | 72 min |
| Nov 26, 4:13 AM HST | Flash Flood Warning | HFO | 3 hr |
| Nov 26, 7:17 AM HST | Flash Flood Warning | HFO | 6 hr |
| Nov 26, 8:33 AM HST | High Surf Advisory | HFO | 67 hr |
| Nov 29, 3:35 PM HST | High Surf Advisory | HFO | 36 hr |
| Dec 2, 3:26 AM HST | High Surf Advisory | HFO | 48 hr |
| Dec 3, 7:04 AM HST | High Surf Warning | HFO | 8 hr |
| Dec 4, 4:03 PM HST | High Surf Warning | HFO | 5 days |
| Dec 9, 3:17 PM HST | High Surf Advisory | HFO | 24 hr |
| Dec 18, 3:13 PM HST | High Surf Advisory | HFO | 60 hr |
| Dec 21, 3:25 AM HST | High Surf Advisory | HFO | 24 hr |
| Dec 22, 3:29 AM HST | High Surf Warning | HFO | 24 hr |
| Dec 23, 3:35 AM HST | High Surf Advisory | HFO | 32 hr |
| Dec 23, 3:32 PM HST | High Surf Warning | HFO | 65 hr |
| Dec 26, 8:46 AM HST | High Surf Advisory | HFO | 19 hr |
| Dec 27, 3:34 PM HST | High Surf Advisory | HFO | 41 hr |
| Dec 30, 3:26 PM HST | High Surf Advisory | HFO | 51 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Flooding | |
| Flash Flood Warning | 14 |
| Flash Flood Watch | 6 |
| Areal Flood Advisory | 13 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 3 |
| Tropical | |
| Tropical Storm Watch | 2 |
| Coast and beach | |
| High Surf Warning | 8 |
| High Surf Advisory | 43 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.