Alert archive / Hawaii / Honolulu County

Weather alerts in Honolulu County, Hawaii, 2019

130 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Honolulu County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts: 130
Warnings: 22
Watches: 9
Advisories: 95
Busiest month: February22 alerts
Busiest day: February 14, 20195 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Honolulu County, 2019

	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	9	2	78%	4	75%	74 min

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Honolulu, HI: severe thunderstorm warnings	1	0	100%	1	0%
NWS Honolulu, HI: flash flood warnings	21	7	67%	12	92%	86 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, 3:29 AM HST	High Surf Advisory	HFO	5 days
Jan 8, 3:52 PM HST	High Surf Advisory	HFO	59 hr
Jan 11, 3:44 PM HST	High Surf Warning	HFO	48 hr
Jan 13, 3:59 PM HST	High Surf Advisory	HFO	71 hr
Jan 14, 3:35 PM HST	High Surf Warning	HFO	36 hr
Jan 22, 3:38 PM HST	High Surf Advisory	HFO	5 days
Jan 23, 3:13 AM HST	High Surf Advisory	HFO	4 days
Jan 25, 3:53 PM HST	High Surf Advisory	HFO	36 hr
Jan 27, 3:28 PM HST	High Surf Advisory	HFO	7 days
Jan 28, 3:49 AM HST	Wind Advisory	HFO	4 days
Feb 6, 3:50 PM HST	High Surf Advisory	HFO	35 hr
Feb 6, 7:57 PM HST	Areal Flood Advisory	HFO	2 hr
Feb 7, 4:06 PM HST	High Surf Warning	HFO	4 days
Feb 8, 3:47 AM HST	Wind Advisory	HFO	36 hr
Feb 8, 7:13 AM HST	High Wind Watch	HFO	32 hr
Feb 8, 7:13 AM HST	High Wind Warning	HFO	4 days
Feb 9, 11:49 PM HST	Special Weather Statement	HFO	56 min
Feb 10, 1:12 AM HST	Special Weather Statement	HFO	63 min
Feb 12, 3:45 AM HST	High Surf Advisory	HFO	72 hr
Feb 12, 10:00 AM HST	High Surf Warning	HFO	65 hr
Feb 13, 3:23 AM HST	Areal Flood Advisory	HFO	3 hr
Feb 13, 5:21 AM HST	Areal Flood Advisory	HFO	114 min
Feb 14, 12:58 AM HST	Areal Flood Advisory	HFO	3 hr
Feb 14, 2:52 AM HST	Flash Flood Warning	HFO	3 hr
Feb 14, 3:30 AM HST	Flash Flood Watch	HFO	24 hr
Feb 14, 5:18 AM HST	Flash Flood Warning	HFO	4 hr
Feb 14, 12:09 PM HST	Areal Flood Advisory	HFO	3 hr
Feb 15, 3:20 AM HST	High Surf Advisory	HFO	13 hr
Feb 15, 3:59 PM HST	High Surf Warning	HFO	61 hr
Feb 15, 3:59 PM HST	High Surf Advisory	HFO	6 days
Feb 19, 4:23 AM HST	High Surf Advisory	HFO	59 hr
Feb 26, 3:29 AM HST	High Surf Advisory	HFO	60 hr
Mar 4, 4:00 PM HST	High Surf Advisory	HFO	3 days
Mar 8, 8:20 PM HST	High Surf Advisory	HFO	3 days
Mar 16, 3:51 PM HST	High Surf Warning	HFO	60 hr
Mar 19, 3:55 AM HST	High Surf Advisory	HFO	11 hr
Mar 20, 7:12 AM HST	High Surf Advisory	HFO	25 hr
Mar 22, 3:02 PM HST	High Surf Advisory	HFO	25 hr
Mar 28, 3:52 PM HST	High Surf Advisory	HFO	36 hr
Mar 31, 3:44 AM HST	High Surf Advisory	HFO	12 hr
Apr 1, 3:57 PM HST	High Surf Advisory	HFO	42 hr
Apr 10, 3:15 PM HST	High Surf Advisory	HFO	5 days
Apr 17, 8:03 AM HST	Areal Flood Advisory	HFO	2 hr
Apr 26, 5:32 PM HST	Areal Flood Advisory	HFO	3 hr
Apr 26, 10:25 PM HST	Areal Flood Advisory	HFO	3 hr
Apr 28, 2:22 PM HST	Areal Flood Advisory	HFO	3 hr
Apr 28, 4:39 PM HST	Areal Flood Advisory	HFO	89 min
Apr 29, 11:24 AM HST	Areal Flood Advisory	HFO	3 hr
Apr 29, 12:08 PM HST	Areal Flood Advisory	HFO	5 hr
Apr 29, 1:37 PM HST	Flash Flood Warning	HFO	2 hr
May 4, 8:18 AM HST	Special Weather Statement	HFO	57 min
May 4, 8:27 AM HST	Areal Flood Advisory	HFO	100 min
May 26, 6:32 PM HST	High Surf Advisory	HFO	33 hr
Jun 13, 3:34 PM HST	High Surf Advisory	HFO	60 hr
Jun 23, 3:01 PM HST	Flash Flood Watch	HFO	6 days
Jun 25, 3:16 AM HST	Areal Flood Advisory	HFO	119 min
Jun 25, 6:22 AM HST	Areal Flood Advisory	HFO	62 min
Jun 25, 5:56 PM HST	Areal Flood Advisory	HFO	3 hr
Jun 25, 6:40 PM HST	Flash Flood Warning	HFO	6 hr
Jun 26, 1:20 AM HST	Areal Flood Advisory	HFO	6 hr
Jun 29, 3:31 PM HST	High Surf Advisory	HFO	4 days
Jul 5, 7:29 PM HST	High Surf Advisory	HFO	56 hr
Jul 8, 3:13 AM HST	High Surf Advisory	HFO	37 hr
Jul 13, 3:21 AM HST	High Surf Advisory	HFO	25 hr
Jul 14, 4:35 AM HST	High Surf Warning	HFO	23 hr
Jul 15, 3:13 AM HST	High Surf Advisory	HFO	24 hr
Aug 1, 3:00 PM HST	High Surf Advisory	HFO	37 hr
Aug 3, 3:36 PM HST	High Surf Advisory	HFO	72 hr
Aug 7, 2:54 PM HST	Areal Flood Advisory	HFO	3 hr
Aug 19, 3:41 PM HST	High Surf Advisory	HFO	60 hr
Sep 14, 2:19 PM HST	Areal Flood Advisory	HFO	3 hr
Sep 14, 5:00 PM HST	Areal Flood Advisory	HFO	3 hr
Sep 14, 6:44 PM HST	Flash Flood Warning	HFO	112 min
Sep 14, 9:34 PM HST	Areal Flood Advisory	HFO	51 min
Sep 15, 6:41 PM HST	Areal Flood Advisory	HFO	3 hr
Sep 15, 10:51 PM HST	Areal Flood Advisory	HFO	110 min
Sep 25, 3:44 AM HST	Areal Flood Advisory	HFO	3 hr
Sep 25, 9:36 AM HST	Flash Flood Watch	HFO	31 hr
Sep 25, 3:54 PM HST	High Surf Advisory	HFO	72 hr
Sep 26, 12:31 PM HST	Areal Flood Advisory	HFO	4 hr
Oct 10, 3:06 PM HST	Flash Flood Watch	HFO	37 hr
Oct 10, 3:27 PM HST	Areal Flood Advisory	HFO	42 min
Oct 11, 1:34 AM HST	Areal Flood Advisory	HFO	3 hr
Oct 11, 1:58 AM HST	Flash Flood Warning	HFO	3 hr
Oct 11, 4:42 AM HST	Flash Flood Warning	HFO	3 hr
Oct 15, 3:38 PM HST	Flash Flood Watch	HFO	36 hr
Oct 20, 12:36 PM HST	Areal Flood Advisory	HFO	63 min
Oct 25, 3:37 AM HST	High Surf Advisory	HFO	24 hr
Oct 26, 3:12 PM HST	High Surf Advisory	HFO	5 days
Oct 31, 1:49 PM HST	Areal Flood Advisory	HFO	2 hr
Nov 3, 3:03 PM HST	High Surf Advisory	HFO	36 hr
Nov 9, 3:07 PM HST	High Surf Advisory	HFO	26 hr
Nov 11, 11:21 AM HST	High Surf Advisory	HFO	16 hr
Nov 11, 3:27 PM HST	Areal Flood Advisory	HFO	104 min
Nov 14, 3:23 AM HST	High Surf Advisory	HFO	44 hr
Nov 16, 3:03 AM HST	High Surf Advisory	HFO	48 hr
Nov 17, 3:07 AM HST	Flash Flood Watch	HFO	3 days
Nov 17, 11:40 AM HST	Areal Flood Advisory	HFO	101 min
Nov 17, 5:11 PM HST	Areal Flood Advisory	HFO	112 min
Nov 18, 11:18 PM HST	Areal Flood Advisory	HFO	3 hr
Nov 18, 11:40 PM HST	Flash Flood Warning	HFO	113 min
Nov 19, 7:00 AM HST	Areal Flood Advisory	HFO	65 min
Nov 19, 2:11 PM HST	Areal Flood Advisory	HFO	3 hr
Nov 19, 2:32 PM HST	Special Weather Statement	HFO	43 min
Nov 19, 7:21 PM HST	Areal Flood Advisory	HFO	3 hr
Nov 19, 7:45 PM HST	Flash Flood Warning	HFO	2 hr
Nov 20, 3:30 AM HST	High Surf Advisory	HFO	5 days
Nov 21, 3:15 AM HST	High Surf Warning	HFO	12 hr
Nov 21, 3:36 PM HST	Wind Advisory	HFO	60 hr
Nov 26, 3:25 PM HST	High Surf Advisory	HFO	24 hr
Nov 30, 3:43 AM HST	Wind Advisory	HFO	48 hr
Nov 30, 3:42 PM HST	High Surf Advisory	HFO	72 hr
Dec 5, 3:34 PM HST	High Surf Advisory	HFO	68 hr
Dec 7, 3:16 AM HST	High Surf Warning	HFO	32 hr
Dec 8, 11:24 AM HST	High Surf Advisory	HFO	16 hr
Dec 9, 3:15 PM HST	High Surf Advisory	HFO	25 hr
Dec 10, 3:50 PM HST	High Surf Warning	HFO	60 hr
Dec 13, 3:30 AM HST	High Surf Advisory	HFO	12 hr
Dec 16, 3:33 AM HST	Wind Advisory	HFO	36 hr
Dec 16, 4:12 AM HST	High Surf Advisory	HFO	3 days
Dec 19, 3:17 AM HST	High Wind Watch	HFO	24 hr
Dec 20, 3:11 AM HST	High Surf Advisory	HFO	3 days
Dec 20, 3:34 AM HST	High Wind Warning	HFO	35 hr
Dec 20, 3:34 AM HST	Wind Advisory	HFO	35 hr
Dec 21, 3:00 PM HST	Wind Advisory	HFO	25 hr
Dec 23, 9:21 AM HST	High Surf Advisory	HFO	18 hr
Dec 23, 3:43 PM HST	High Wind Watch	HFO	12 hr
Dec 24, 3:47 AM HST	Wind Advisory	HFO	36 hr
Dec 25, 12:07 PM HST	Areal Flood Advisory	HFO	5 hr
Dec 29, 3:16 PM HST	High Surf Warning	HFO	60 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
Special Weather Statement	4
Flooding
Flash Flood Warning	9
Flash Flood Watch	6
Areal Flood Advisory	37
Wind and dust
High Wind Warning	2
High Wind Watch	3
Wind Advisory	8
Coast and beach
High Surf Warning	11
High Surf Advisory	50

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2018 2020

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.