Weather alerts in Maui County, Hawaii, 2021

139 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Maui County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 139
Warnings: 23
Watches: 10
Advisories: 101
Busiest month: December31 alerts
Busiest day: March 13, 20218 alerts

Over time

By month

Warning verification

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

Maui County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	0			2	0%
Flash flood warnings	16	7	56%	12	67%	239 min

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Honolulu, HI: severe thunderstorm warnings	0			3	0%
NWS Honolulu, HI: flash flood warnings	50	22	56%	71	72%	201 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 2, 3:21 AM HST	High Surf Advisory	HFO	12 hr
Jan 4, 4:37 AM HST	High Surf Advisory	HFO	4 days
Jan 9, 3:32 AM HST	High Surf Advisory	HFO	48 hr
Jan 9, 5:29 PM HST	Special Weather Statement	HFO	61 min
Jan 9, 5:47 PM HST	Special Weather Statement	HFO	58 min
Jan 9, 6:51 PM HST	Areal Flood Advisory	HFO	3 hr
Jan 10, 3:26 AM HST	High Surf Warning	HFO	24 hr
Jan 11, 3:38 AM HST	High Surf Advisory	HFO	36 hr
Jan 13, 6:53 AM HST	Areal Flood Advisory	HFO	101 min
Jan 13, 3:07 PM HST	High Surf Warning	HFO	36 hr
Jan 14, 3:44 AM HST	High Surf Advisory	HFO	48 hr
Jan 15, 10:00 AM HST	High Surf Warning	HFO	4 days
Jan 16, 5:23 AM HST	High Surf Advisory	HFO	4 days
Jan 17, 3:04 AM HST	Flash Flood Watch	HFO	3 days
Jan 17, 3:37 PM HST	Wind Advisory	HFO	48 hr
Jan 18, 12:06 AM HST	Areal Flood Advisory	HFO	3 hr
Jan 18, 12:51 AM HST	Flash Flood Warning	HFO	6 hr
Jan 18, 3:03 AM HST	Areal Flood Advisory	HFO	3 hr
Jan 18, 5:16 AM HST	Areal Flood Advisory	HFO	3 hr
Jan 18, 10:50 AM HST	Areal Flood Advisory	HFO	6 hr
Jan 18, 11:50 AM HST	Areal Flood Advisory	HFO	3 hr
Jan 18, 2:25 PM HST	Flash Flood Warning	HFO	9 hr
Jan 18, 2:59 PM HST	Flash Flood Warning	HFO	3 hr
Jan 18, 5:54 PM HST	Areal Flood Advisory	HFO	5 hr
Jan 22, 3:33 PM HST	Wind Advisory	HFO	36 hr
Jan 22, 4:19 PM HST	High Surf Advisory	HFO	7 days
Jan 24, 8:46 AM HST	Flash Flood Watch	HFO	55 hr
Jan 28, 3:13 AM HST	Wind Advisory	HFO	12 hr
Feb 3, 1:44 AM HST	Wind Advisory	HFO	19 hr
Feb 3, 7:16 AM HST	Winter Weather Advisory	HFO	27 hr
Feb 3, 1:19 PM HST	Areal Flood Advisory	HFO	3 hr
Feb 3, 2:31 PM HST	Special Weather Statement	HFO	119 min
Feb 4, 3:31 AM HST	High Surf Advisory	HFO	59 hr
Feb 8, 3:18 PM HST	Winter Weather Advisory	HFO	24 hr
Feb 8, 3:49 PM HST	High Surf Advisory	HFO	35 hr
Feb 10, 3:31 AM HST	Tsunami Watch	HEB	169 days
Feb 12, 3:37 AM HST	High Surf Warning	HFO	48 hr
Feb 13, 4:06 AM HST	High Surf Advisory	HFO	3 days
Feb 16, 9:30 AM HST	Flash Flood Watch	HFO	66 hr
Feb 18, 7:59 AM HST	Areal Flood Advisory	HFO	6 hr
Feb 18, 10:29 AM HST	Areal Flood Advisory	HFO	3 hr
Feb 22, 3:55 AM HST	High Surf Advisory	HFO	12 hr
Feb 22, 3:55 AM HST	High Surf Advisory	HFO	12 hr
Feb 22, 3:55 AM HST	High Surf Advisory	HFO	9 days
Feb 24, 8:49 AM HST	Wind Advisory	HFO	55 hr
Feb 26, 8:27 AM HST	Flash Flood Watch	HFO	67 hr
Feb 27, 8:51 AM HST	Areal Flood Advisory	HFO	68 min
Feb 27, 9:59 AM HST	Flash Flood Warning	HFO	86 min
Feb 27, 1:51 PM HST	Areal Flood Advisory	HFO	3 hr
Feb 28, 3:15 AM HST	Wind Advisory	HFO	65 hr
Mar 5, 3:25 PM HST	High Surf Advisory	HFO	12 hr
Mar 7, 11:20 AM HST	Flash Flood Watch	HFO	8 days
Mar 7, 3:55 PM HST	High Surf Advisory	HFO	24 hr
Mar 8, 10:04 AM HST	Areal Flood Advisory	HFO	3 hr
Mar 8, 11:15 AM HST	Flash Flood Warning	HFO	7 hr
Mar 8, 2:42 PM HST	Flash Flood Warning Considerable damage threat	HFO	5 hr
Mar 8, 8:07 PM HST	High Surf Advisory	HFO	19 hr
Mar 8, 9:32 PM HST	Areal Flood Advisory	HFO	33 min
Mar 8, 10:05 PM HST	Flash Flood Warning	HFO	5 hr
Mar 9, 10:56 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 10, 10:11 AM HST	High Surf Advisory	HFO	29 hr
Mar 10, 3:45 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 11, 2:46 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 11, 8:54 PM HST	Areal Flood Advisory	HFO	6 hr
Mar 12, 3:13 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 12, 4:16 PM HST	High Surf Advisory	HFO	3 days
Mar 12, 5:46 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 12, 8:36 PM HST	Flash Flood Warning	HFO	18 hr
Mar 12, 10:59 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 12, 11:01 PM HST	Areal Flood Advisory	HFO	6 hr
Mar 13, 3:23 AM HST	Areal Flood Advisory	HFO	119 min
Mar 13, 5:22 AM HST	Flash Flood Warning	HFO	2 hr
Mar 13, 10:15 PM HST	Areal Flood Advisory	HFO	53 min
Mar 14, 10:25 AM HST	Areal Flood Advisory	HFO	60 min
Mar 15, 1:32 PM HST	Areal Flood Advisory	HFO	58 min
Mar 16, 3:41 AM HST	High Surf Advisory	HFO	6 days
Mar 16, 7:29 PM HST	Areal Flood Advisory	HFO	3 hr
Mar 17, 3:53 AM HST	Areal Flood Advisory	HFO	3 hr
Mar 17, 11:43 AM HST	Wind Advisory	HFO	9 hr
Mar 19, 3:28 PM HST	Wind Advisory	HFO	53 hr
Apr 5, 3:23 PM HST	High Surf Advisory	HFO	3 days
Apr 11, 1:20 PM HST	Winter Weather Advisory	HFO	11 hr
Apr 11, 2:22 PM HST	Areal Flood Advisory	HFO	78 min
May 4, 4:30 PM HST	Areal Flood Advisory	HFO	100 min
May 5, 9:17 AM HST	Flash Flood Watch	HFO	54 hr
May 24, 3:09 PM HST	Coastal Flood Statement	HFO	4 days
Jun 20, 4:34 PM HST	High Surf Advisory	HFO	23 hr
Jul 4, 3:22 PM HST	High Surf Advisory	HFO	3 days
Jul 31, 8:30 PM HST	Wind Advisory	HFO	21 hr
Aug 16, 3:30 PM HST	High Surf Advisory	HFO	60 hr
Aug 20, 2:39 PM HST	Flash Flood Watch	HFO	4 days
Aug 21, 4:01 PM HST	High Surf Advisory	HFO	59 hr
Aug 22, 1:48 PM HST	Wind Advisory	HFO	37 hr
Aug 23, 11:08 AM HST	Areal Flood Advisory	HFO	3 hr
Aug 23, 1:43 PM HST	Areal Flood Advisory	HFO	6 hr
Sep 3, 3:11 AM HST	Wind Advisory	HFO	17 hr
Sep 14, 4:37 PM HST	Areal Flood Advisory	HFO	57 min
Sep 24, 5:57 AM HST	High Surf Advisory	HFO	22 hr
Oct 7, 3:33 PM HST	Wind Advisory	HFO	3 days
Oct 8, 3:30 PM HST	High Surf Advisory	HFO	3 days
Oct 30, 3:27 PM HST	High Surf Advisory	HFO	48 hr
Nov 1, 3:33 PM HST	High Surf Warning	HFO	36 hr
Nov 3, 3:17 AM HST	High Surf Advisory	HFO	24 hr
Nov 14, 3:42 AM HST	Flood Watch	HFO	23 hr
Nov 14, 4:28 AM HST	Areal Flood Advisory	HFO	3 hr
Nov 14, 5:20 AM HST	Flash Flood Warning	HFO	116 min
Nov 24, 3:29 PM HST	High Surf Advisory	HFO	60 hr
Nov 28, 1:53 PM HST	Wind Advisory	HFO	26 hr
Dec 1, 5:13 PM HST	Areal Flood Advisory	HFO	2 hr
Dec 2, 3:04 PM HST	Flood Watch	HFO	5 days
Dec 2, 3:26 PM HST	High Wind Warning	HFO	3 days
Dec 2, 3:26 PM HST	Wind Advisory	HFO	44 hr
Dec 3, 5:16 AM HST	Areal Flood Advisory	HFO	3 hr
Dec 3, 9:08 AM HST	High Surf Warning	HFO	66 hr
Dec 3, 9:08 AM HST	High Surf Advisory	HFO	66 hr
Dec 3, 1:32 PM HST	Areal Flood Advisory	HFO	3 hr
Dec 4, 12:13 AM HST	Areal Flood Advisory	HFO	106 min
Dec 4, 1:59 AM HST	Flash Flood Warning	HFO	109 min
Dec 4, 3:09 PM HST	Wind Advisory	HFO	55 hr
Dec 5, 11:51 AM HST	Areal Flood Advisory	HFO	3 hr
Dec 5, 12:24 PM HST	Areal Flood Advisory	HFO	4 hr
Dec 5, 3:18 PM HST	Areal Flood Advisory	HFO	3 hr
Dec 5, 3:35 PM HST	Coastal Flood Statement	HFO	42 hr
Dec 5, 4:27 PM HST	Flash Flood Warning	HFO	5 hr
Dec 5, 5:33 PM HST	Areal Flood Advisory	HFO	6 hr
Dec 5, 6:22 PM HST	Flash Flood Warning	HFO	3 hr
Dec 5, 9:16 PM HST	Flash Flood Warning Considerable damage threat	HFO	12 hr
Dec 5, 9:20 PM HST	Flash Flood Warning	HFO	11 hr
Dec 6, 3:37 AM HST	High Surf Advisory	HFO	12 hr
Dec 16, 8:16 PM HST	Areal Flood Advisory	HFO	3 hr
Dec 16, 11:01 PM HST	Areal Flood Advisory	HFO	106 min
Dec 17, 1:43 AM HST	Areal Flood Advisory	HFO	2 hr
Dec 17, 2:10 PM HST	Areal Flood Advisory	HFO	35 min
Dec 17, 2:39 PM HST	Flash Flood Warning	HFO	66 min
Dec 20, 3:08 PM HST	High Surf Advisory	HFO	5 days
Dec 22, 12:21 AM HST	Areal Flood Advisory	HFO	10 hr
Dec 30, 3:04 PM HST	Areal Flood Advisory	HFO	3 hr
Dec 31, 12:18 PM HST	Areal Flood Advisory	HFO	4 hr
Dec 31, 1:28 PM HST	Areal Flood Advisory	HFO	3 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	3
Flooding
Flash Flood Warning	16
Flash Flood Watch	7
Flood Watch	2
Areal Flood Advisory	51
Winter
Winter Weather Advisory	3
Wind and dust
High Wind Warning	1
Wind Advisory	15
Coast and beach
High Surf Warning	6
Tsunami Watch	1
High Surf Advisory	32
Coastal Flood Statement	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2020 2022

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.