Weather alerts in Kauai County, Hawaii, 2011

106 weather alerts in 2011, 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 2011. Tap one for its archive.

Alerts: 106
Warnings: 22
Watches: 15
Advisories: 69
Busiest month: January23 alerts
Busiest day: March 4, 20116 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, 2011

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	1	0	100%
Flash flood warnings	13	2	85%

Each office's whole area, 2011

	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	3	0	100%	8	0%
NWS Honolulu, HI: flash flood warnings	41	20	51%	31	87%	116 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, 2:49 PM HST	High Surf Warning	HFO	49 hr
Jan 1, 2:49 PM HST	High Surf Advisory	HFO	49 hr
Jan 3, 4:11 PM HST	High Surf Warning	HFO	48 hr
Jan 3, 4:11 PM HST	High Surf Advisory	HFO	4 days
Jan 10, 3:46 AM HST	High Surf Advisory	HFO	60 hr
Jan 10, 3:38 PM HST	Flash Flood Watch	HFO	3 days
Jan 11, 3:30 PM HST	Wind Advisory	HFO	53 hr
Jan 12, 5:05 AM HST	Areal Flood Advisory	HFO	3 hr
Jan 12, 8:12 AM HST	Severe Thunderstorm Watch	SPC	134 days
Jan 12, 4:59 PM HST	Areal Flood Advisory	HFO	3 hr
Jan 13, 4:11 AM HST	Areal Flood Advisory	HFO	3 hr
Jan 14, 3:39 PM HST	High Surf Warning	HFO	71 hr
Jan 16, 4:57 AM HST	Areal Flood Advisory	HFO	86 min
Jan 16, 11:17 AM HST	Flash Flood Watch	HFO	11 hr
Jan 16, 1:34 PM HST	Areal Flood Advisory	HFO	3 hr
Jan 16, 1:55 PM HST	Flash Flood Warning	HFO	5 hr
Jan 16, 5:56 PM HST	Wind Advisory	HFO	2 hr
Jan 17, 8:02 AM HST	High Surf Advisory	HFO	43 hr
Jan 18, 3:17 PM HST	High Surf Warning	HFO	4 days
Jan 21, 3:31 PM HST	High Surf Advisory	HFO	48 hr
Jan 23, 3:31 PM HST	High Surf Advisory	HFO	3 days
Jan 28, 11:31 PM HST	High Surf Advisory	HFO	16 hr
Jan 30, 9:46 AM HST	High Surf Warning	HFO	42 hr
Feb 1, 3:34 AM HST	High Surf Advisory	HFO	40 hr
Feb 4, 3:52 PM HST	High Surf Advisory	HFO	50 hr
Feb 6, 7:59 AM HST	High Surf Warning	HFO	56 hr
Feb 7, 6:50 PM HST	High Surf Advisory	HFO	38 hr
Feb 10, 6:33 AM HST	Areal Flood Advisory	HFO	87 min
Feb 11, 2:54 PM HST	High Surf Advisory	HFO	3 days
Feb 17, 3:35 AM HST	Flash Flood Watch	HFO	40 hr
Feb 20, 10:05 AM HST	Flash Flood Watch	HFO	4 days
Feb 20, 7:01 PM HST	Areal Flood Advisory	HFO	3 hr
Feb 20, 7:05 PM HST	Areal Flood Advisory	HFO	70 min
Feb 23, 11:23 PM HST	Areal Flood Advisory	HFO	4 hr
Mar 3, 1:27 AM HST	Areal Flood Advisory	HFO	2 hr
Mar 3, 3:35 AM HST	Flash Flood Watch	HFO	60 hr
Mar 3, 7:00 AM HST	Areal Flood Advisory	HFO	8 hr
Mar 3, 1:33 PM HST	Severe Thunderstorm Warning	HFO	27 min
Mar 3, 3:38 PM HST	Wind Advisory	HFO	24 hr
Mar 3, 7:24 PM HST	Severe Thunderstorm Watch	SPC	157 days
Mar 3, 8:05 PM HST	Areal Flood Advisory	HFO	85 min
Mar 3, 9:29 PM HST	Flash Flood Warning	HFO	84 min
Mar 4, 1:11 AM HST	Areal Flood Advisory	HFO	109 min
Mar 4, 3:01 AM HST	Areal Flood Advisory	HFO	95 min
Mar 4, 2:41 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 4, 3:46 PM HST	Flash Flood Warning	HFO	99 min
Mar 4, 5:29 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 9, 3:39 PM HST	High Surf Advisory	HFO	24 hr
Mar 13, 8:02 AM HST	High Surf Advisory	HFO	3 days
Mar 14, 10:05 AM HST	High Surf Warning	HFO	43 hr
Mar 15, 3:40 PM HST	Wind Advisory	HFO	5 days
Mar 16, 5:30 AM HST	High Surf Advisory	HFO	10 hr
Mar 16, 3:17 PM HST	High Surf Advisory	HFO	5 days
Mar 22, 3:38 AM HST	Wind Advisory	HFO	72 hr
Mar 29, 3:04 PM HST	High Surf Advisory	HFO	65 hr
Apr 4, 3:39 PM HST	Flash Flood Watch	HFO	4 days
Apr 5, 6:46 AM HST	High Surf Advisory	HFO	33 hr
Apr 6, 4:52 PM HST	Areal Flood Advisory	HFO	54 min
Apr 7, 2:18 AM HST	Areal Flood Advisory	HFO	39 min
Apr 7, 8:46 AM HST	Areal Flood Advisory	HFO	3 hr
Apr 17, 3:09 PM HST	Areal Flood Advisory	HFO	2 hr
Apr 19, 3:15 PM HST	High Surf Advisory	HFO	48 hr
May 3, 4:06 AM HST	Flash Flood Warning	HFO	54 min
May 7, 3:35 PM HST	Flash Flood Watch	HFO	60 hr
May 8, 3:57 AM HST	Flash Flood Warning	HFO	3 hr
May 8, 6:42 AM HST	Flash Flood Warning	HFO	15 hr
May 8, 9:41 PM HST	Flash Flood Warning	HFO	12 hr
May 10, 12:14 AM HST	Flash Flood Warning	HFO	3 hr
May 10, 1:23 AM HST	Flash Flood Warning	HFO	82 min
May 10, 3:43 AM HST	Flash Flood Watch	HFO	24 hr
May 11, 11:26 PM HST	Areal Flood Advisory	HFO	2 hr
May 12, 9:22 AM HST	Flash Flood Watch	HFO	54 hr
May 12, 10:35 AM HST	Areal Flood Advisory	HFO	3 hr
May 12, 3:21 PM HST	Severe Thunderstorm Watch	SPC	6 hr
May 12, 3:25 PM HST	Areal Flood Advisory	HFO	3 hr
May 12, 4:05 PM HST	Flash Flood Warning	HFO	4 hr
May 14, 5:40 AM HST	Areal Flood Advisory	HFO	3 hr
May 14, 8:19 AM HST	Areal Flood Advisory	HFO	95 min
May 23, 4:43 PM HST	High Surf Advisory	HFO	23 hr
Jun 3, 9:58 AM HST	Areal Flood Advisory	HFO	3 hr
Jun 3, 12:04 PM HST	Flash Flood Warning	HFO	69 min
Jun 4, 7:00 AM HST	Flash Flood Watch	HFO	21 hr
Jun 4, 1:06 PM HST	Areal Flood Advisory	HFO	2 hr
Jun 4, 5:00 PM HST	High Surf Advisory	HFO	64 hr
Jun 20, 3:37 PM HST	High Surf Advisory	HFO	3 days
Jul 5, 3:43 PM HST	High Surf Advisory	HFO	4 days
Aug 29, 5:39 AM HST	High Surf Advisory	HFO	26 hr
Aug 30, 7:41 AM HST	High Surf Warning	HFO	28 hr
Aug 31, 11:52 AM HST	High Surf Advisory	HFO	28 hr
Sep 8, 3:30 PM HST	High Surf Advisory	HFO	4 days
Oct 3, 3:36 PM HST	High Surf Advisory	HFO	3 days
Oct 22, 3:32 PM HST	High Surf Advisory	HFO	36 hr
Nov 4, 4:02 AM HST	Flash Flood Watch	HFO	52 hr
Nov 5, 3:18 PM HST	Flash Flood Warning	HFO	2 hr
Nov 5, 5:58 PM HST	Areal Flood Advisory	HFO	3 hr
Nov 5, 7:07 PM HST	Flash Flood Warning	HFO	9 hr
Nov 6, 4:10 AM HST	Areal Flood Advisory	HFO	3 hr
Nov 25, 7:35 PM HST	Wind Advisory	HFO	19 hr
Nov 26, 3:36 AM HST	High Surf Advisory	HFO	3 days
Nov 30, 3:23 PM HST	High Surf Advisory	HFO	60 hr
Dec 5, 3:34 PM HST	High Surf Advisory	HFO	36 hr
Dec 7, 3:41 PM HST	High Surf Advisory	HFO	72 hr
Dec 10, 8:03 PM HST	Flash Flood Watch	HFO	31 hr
Dec 15, 3:34 PM HST	High Surf Advisory	HFO	3 days
Dec 23, 3:52 AM HST	Wind Advisory	HFO	6 days
Dec 28, 4:25 AM HST	High Surf Advisory	HFO	35 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	1
Severe Thunderstorm Watch	3
Flooding
Flash Flood Warning	13
Flash Flood Watch	12
Areal Flood Advisory	29
Wind and dust
Wind Advisory	7
Coast and beach
High Surf Warning	8
High Surf Advisory	33

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.