Weather alerts in Hawaii County, Hawaii, 2011

119 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Hawaii County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 119
Warnings: 14
Watches: 18
Advisories: 87
Busiest month: January33 alerts
Busiest day: April 7, 20114 alerts

Over time

By month

Warning verification

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

Hawaii County, 2011

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	0
Flash flood warnings	2	1	50%

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 2, 5:43 AM HST	Wind Advisory	HFO	40 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 6, 3:08 PM HST	High Wind Watch	HFO	19 hr
Jan 7, 9:55 AM HST	High Wind Warning	HFO	18 hr
Jan 7, 3:28 PM HST	Wind Chill Advisory	HFO	59 min
Jan 7, 4:27 PM HST	Winter Weather Advisory	HFO	12 hr
Jan 8, 3:45 AM HST	Wind Advisory	HFO	30 hr
Jan 8, 8:41 PM HST	High Wind Warning	HFO	19 hr
Jan 9, 3:22 PM HST	Wind Advisory	HFO	12 hr
Jan 10, 3:46 AM HST	High Surf Advisory	HFO	60 hr
Jan 10, 3:46 AM HST	Wind Advisory	HFO	24 hr
Jan 10, 3:38 PM HST	Flash Flood Watch	HFO	3 days
Jan 10, 4:52 PM HST	Winter Weather Advisory	HFO	19 hr
Jan 11, 3:44 AM HST	Winter Storm Watch	HFO	24 hr
Jan 11, 3:30 PM HST	Areal Flood Advisory	HFO	6 hr
Jan 11, 3:30 PM HST	Wind Advisory	HFO	53 hr
Jan 12, 3:31 AM HST	Winter Storm Warning	HFO	36 hr
Jan 13, 2:12 PM HST	Areal Flood Advisory	HFO	3 hr
Jan 13, 3:49 PM HST	Winter Weather Advisory	HFO	15 hr
Jan 13, 5:00 PM HST	Areal Flood Advisory	HFO	3 hr
Jan 14, 3:39 PM HST	High Surf Warning	HFO	71 hr
Jan 16, 10:19 PM HST	Winter Weather Advisory	HFO	10 hr
Jan 17, 8:02 AM HST	High Surf Advisory	HFO	43 hr
Jan 18, 3:46 AM HST	Winter Storm Watch	HFO	19 hr
Jan 18, 3:47 AM HST	Flash Flood Watch	HFO	36 hr
Jan 18, 3:17 PM HST	High Surf Warning	HFO	4 days
Jan 18, 11:00 PM HST	Winter Storm Warning	HFO	17 hr
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 23, 3:32 PM HST	Wind Advisory	HFO	24 hr
Jan 30, 9:46 AM HST	High Surf Advisory	HFO	42 hr
Feb 7, 6:50 PM HST	High Surf Advisory	HFO	38 hr
Feb 15, 9:52 AM HST	Wind Advisory	HFO	6 hr
Feb 20, 10:05 AM HST	Flash Flood Watch	HFO	4 days
Feb 22, 4:28 AM HST	Winter Storm Watch	HFO	23 hr
Feb 23, 3:36 AM HST	Winter Storm Warning	HFO	36 hr
Feb 24, 6:11 AM HST	Areal Flood Advisory	HFO	3 hr
Mar 2, 3:43 PM HST	High Wind Watch	HFO	24 hr
Mar 3, 3:35 AM HST	Flash Flood Watch	HFO	60 hr
Mar 3, 7:35 AM HST	High Wind Warning	HFO	44 hr
Mar 4, 3:14 PM HST	Wind Advisory	HFO	24 hr
Mar 4, 3:31 PM HST	Winter Weather Advisory	HFO	72 hr
Mar 6, 12:43 PM HST	Flash Flood Watch	HFO	15 hr
Mar 15, 3:40 PM HST	Wind Advisory	HFO	5 days
Mar 22, 3:38 AM HST	Wind Advisory	HFO	72 hr
Mar 27, 5:04 PM HST	Areal Flood Advisory	HFO	119 min
Mar 28, 3:31 AM HST	Winter Weather Advisory	HFO	4 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, 7:21 AM HST	Winter Storm Watch	HFO	8 hr
Apr 5, 3:05 PM HST	Winter Weather Advisory	HFO	25 hr
Apr 6, 2:53 PM HST	Areal Flood Advisory	HFO	3 hr
Apr 6, 3:54 PM HST	Winter Storm Warning	HFO	60 hr
Apr 6, 4:20 PM HST	Flash Flood Warning	HFO	89 min
Apr 7, 12:19 AM HST	Areal Flood Advisory	HFO	58 min
Apr 8, 3:42 AM HST	Wind Advisory	HFO	24 hr
Apr 9, 3:35 AM HST	Winter Weather Advisory	HFO	8 hr
Apr 9, 3:32 PM HST	Winter Weather Advisory	HFO	12 hr
Apr 19, 3:15 PM HST	High Surf Advisory	HFO	48 hr
May 1, 3:23 PM HST	Winter Weather Advisory	HFO	52 hr
May 2, 12:47 PM HST	Areal Flood Advisory	HFO	3 hr
May 2, 2:43 PM HST	Areal Flood Advisory	HFO	86 min
May 3, 12:35 PM HST	Areal Flood Advisory	HFO	3 hr
May 3, 3:37 PM HST	Areal Flood Advisory	HFO	79 min
May 4, 5:18 AM HST	Winter Weather Advisory	HFO	3 hr
May 4, 3:53 PM HST	Winter Weather Advisory	HFO	6 days
May 6, 3:14 PM HST	Areal Flood Advisory	HFO	3 hr
May 6, 3:36 PM HST	Flash Flood Warning	HFO	97 min
May 8, 2:51 PM HST	Areal Flood Advisory	HFO	92 min
May 23, 4:43 PM HST	High Surf Advisory	HFO	23 hr
May 31, 3:56 PM HST	Winter Weather Advisory	HFO	24 hr
Jun 3, 3:47 PM HST	Areal Flood Advisory	HFO	76 min
Jun 4, 7:00 AM HST	Flash Flood Watch	HFO	21 hr
Jun 4, 12:46 PM HST	Winter Weather Advisory	HFO	26 hr
Jun 4, 4:38 PM HST	Areal Flood Advisory	HFO	3 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 1, 3:47 PM HST	Wind Advisory	HFO	40 hr
Jul 5, 3:43 PM HST	High Surf Advisory	HFO	4 days
Jul 6, 3:38 PM HST	Wind Advisory	HFO	36 hr
Jul 8, 9:06 AM HST	Wind Advisory	HFO	18 hr
Jul 11, 12:42 PM HST	Areal Flood Advisory	HFO	2 hr
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
Nov 1, 3:36 AM HST	Flash Flood Watch	HFO	12 hr
Nov 1, 2:01 PM HST	Winter Weather Advisory	HFO	3 days
Nov 2, 3:27 PM HST	Areal Flood Advisory	HFO	98 min
Nov 2, 6:38 PM HST	Areal Flood Advisory	HFO	3 hr
Nov 3, 1:57 PM HST	Areal Flood Advisory	HFO	2 hr
Nov 3, 5:23 PM HST	Areal Flood Advisory	HFO	90 min
Nov 4, 3:11 AM HST	Areal Flood Advisory	HFO	3 hr
Nov 4, 4:02 AM HST	Flash Flood Watch	HFO	52 hr
Nov 8, 12:36 PM HST	Areal Flood Advisory	HFO	68 min
Nov 9, 12:24 PM HST	Wind Advisory	HFO	42 hr
Nov 10, 10:11 AM HST	Winter Weather Advisory	HFO	55 hr
Nov 20, 5:01 PM HST	Winter Weather Advisory	HFO	17 hr
Nov 25, 7:35 PM HST	Wind Advisory	HFO	19 hr
Nov 26, 2:20 PM HST	Wind Advisory	HFO	13 hr
Dec 7, 3:41 PM HST	High Surf Advisory	HFO	72 hr
Dec 10, 10:38 AM HST	Wind Advisory	HFO	33 hr
Dec 10, 6:38 PM HST	Winter Weather Advisory	HFO	3 days
Dec 10, 7:14 PM HST	Areal Flood Advisory	HFO	6 hr
Dec 10, 8:03 PM HST	Flash Flood Watch	HFO	31 hr
Dec 13, 3:05 AM HST	Flash Flood Watch	HFO	24 hr
Dec 13, 2:17 PM HST	Areal Flood Advisory	HFO	108 min
Dec 17, 2:36 PM HST	Areal Flood Advisory	HFO	3 hr
Dec 17, 2:47 PM HST	Winter Weather Advisory	HFO	25 hr
Dec 17, 5:21 PM HST	Areal Flood Advisory	HFO	3 hr
Dec 19, 12:16 AM HST	Areal Flood Advisory	HFO	5 hr
Dec 19, 2:06 AM HST	Winter Weather Advisory	HFO	37 hr
Dec 19, 2:25 AM HST	Flash Flood Watch	HFO	25 hr
Dec 19, 10:45 PM HST	Areal Flood Advisory	HFO	3 hr
Dec 22, 3:26 AM HST	Winter Weather Advisory	HFO	8 hr
Dec 23, 3:52 AM HST	Wind Advisory	HFO	6 days

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	2
Flash Flood Watch	12
Areal Flood Advisory	28
Winter
Winter Storm Warning	4
Winter Storm Watch	4
Winter Weather Advisory	21
Cold
Wind Chill Advisory	1
Wind and dust
High Wind Warning	3
High Wind Watch	2
Wind Advisory	19
Coast and beach
High Surf Warning	5
High Surf Advisory	18

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.