Alert archive / New York / Nassau County

Weather alerts in Nassau County, New York, 2021

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

Nassau County and its neighbors

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

Alerts: 256
Warnings: 42
Watches: 29
Advisories: 74
Busiest month: July64 alerts
Busiest day: September 2, 202114 alerts

Over time

By month

Warning verification

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

1 of 1 tornado warnings covering Nassau County in 2021 had a tornado report inside them; 1 of 3 tornado reports fell inside a warning, on average 2 minutes after it went out.

Nassau County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	1	0%	3	33%	2 min
Severe thunderstorm warnings	18	12	33%	17	88%	30 min
Flash flood warnings	8	6	25%	10	100%	89 min

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS New York, NY: tornado warnings	16	5	69%	13	62%	8 min
NWS New York, NY: severe thunderstorm warnings	88	56	36%	193	69%	24 min
NWS New York, NY: flash flood warnings	50	45	10%	249	91%	125 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 15, 4:08 PM EST	Coastal Flood Statement	OKX	23 hr
Jan 20, 8:33 AM EST	Special Weather Statement	OKX	42 min
Jan 29, 6:06 AM EST	Wind Advisory	OKX	12 hr
Jan 30, 3:40 AM EST	Winter Storm Watch	OKX	36 hr
Jan 30, 4:20 AM EST	Coastal Flood Watch	OKX	24 hr
Jan 31, 3:44 AM EST	Winter Storm Warning	OKX	48 hr
Jan 31, 4:01 AM EST	Coastal Flood Warning	OKX	35 hr
Jan 31, 4:01 AM EST	Coastal Flood Warning	OKX	49 hr
Jan 31, 4:01 AM EST	Coastal Flood Advisory	OKX	37 hr
Feb 1, 7:13 AM EST	Mesoscale Discussion	SPC	6 hr
Feb 1, 7:48 AM EST	Coastal Flood Watch	OKX	23 hr
Feb 1, 1:43 PM EST	Mesoscale Discussion	SPC	6 hr
Feb 2, 7:15 AM EST	Coastal Flood Watch	OKX	11 hr
Feb 2, 7:15 AM EST	Coastal Flood Statement	OKX	9 hr
Feb 2, 7:15 AM EST	Coastal Flood Warning	OKX	10 hr
Feb 2, 7:15 AM EST	Coastal Flood Advisory	OKX	23 hr
Feb 2, 6:41 PM EST	Coastal Flood Warning	OKX	8 hr
Feb 3, 6:06 AM EST	Coastal Flood Statement	OKX	10 hr
Feb 5, 3:29 PM EST	Winter Storm Watch	OKX	13 hr
Feb 6, 4:00 AM EST	Winter Storm Warning	OKX	39 hr
Feb 10, 3:30 PM EST	Winter Weather Advisory	OKX	18 hr
Feb 13, 3:18 AM EST	Winter Weather Advisory	OKX	31 hr
Feb 14, 3:32 PM EST	Winter Weather Advisory	OKX	37 hr
Feb 16, 7:19 AM EST	Areal Flood Advisory	OKX	2 hr
Feb 16, 3:42 PM EST	Winter Storm Watch	OKX	24 hr
Feb 17, 3:55 PM EST	Winter Weather Advisory	OKX	51 hr
Feb 18, 9:47 AM EST	Mesoscale Discussion	SPC	4 hr
Feb 28, 12:58 PM EST	Coastal Flood Statement	OKX	22 hr
Feb 28, 3:38 PM EST	Wind Advisory	OKX	47 hr
Mar 12, 4:23 AM EST	Wind Advisory	OKX	26 hr
Mar 13, 3:31 PM EST	Wind Advisory	OKX	29 hr
Mar 25, 3:42 PM EDT	Wind Advisory	OKX	32 hr
Mar 25, 9:11 PM EDT	Dense Fog Advisory	OKX	12 hr
Mar 28, 3:54 AM EDT	Wind Advisory	OKX	34 hr
Mar 28, 4:41 PM EDT	Dense Fog Advisory	OKX	4 hr
Mar 28, 7:55 PM EDT	Special Weather Statement	OKX	50 min
Mar 28, 8:18 PM EDT	Special Weather Statement	OKX	42 min
Mar 31, 4:59 AM EDT	Coastal Flood Statement	OKX	23 hr
Apr 1, 3:28 AM EDT	Freeze Watch	OKX	12 hr
Apr 1, 3:18 PM EDT	Freeze Watch	OKX	24 hr
Apr 1, 3:18 PM EDT	Freeze Warning	OKX	19 hr
Apr 2, 3:28 PM EDT	Freeze Warning	OKX	19 hr
Apr 11, 2:40 AM EDT	Dense Fog Advisory	OKX	7 hr
Apr 11, 3:19 PM EDT	Coastal Flood Statement	OKX	7 hr
Apr 12, 6:00 AM EDT	Coastal Flood Statement	OKX	17 hr
Apr 21, 10:58 AM EDT	Special Weather Statement	OKX	47 min
Apr 21, 11:49 AM EDT	Mesoscale Discussion	SPC	2 hr
Apr 21, 12:28 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 21, 2:05 PM EDT	Special Weather Statement	OKX	85 min
Apr 21, 2:12 PM EDT	Severe Thunderstorm Warning	OKX	48 min
Apr 21, 2:56 PM EDT	Mesoscale Discussion	SPC	94 min
Apr 21, 3:17 PM EDT	Severe Thunderstorm Warning	OKX	19 min
Apr 28, 3:54 AM EDT	Coastal Flood Statement	OKX	23 hr
Apr 29, 3:47 AM EDT	Coastal Flood Statement	OKX	23 hr
Apr 29, 3:47 AM EDT	Coastal Flood Advisory	OKX	23 hr
Apr 29, 3:30 PM EDT	Wind Advisory	OKX	36 hr
Apr 30, 4:03 PM EDT	Special Weather Statement	OKX	27 min
May 23, 1:20 PM EDT	Mesoscale Discussion	SPC	115 min
May 26, 4:41 PM EDT	Mesoscale Discussion	SPC	64 min
May 26, 6:45 PM EDT	Special Weather Statement	OKX	60 min
May 26, 7:34 PM EDT	Special Weather Statement	OKX	41 min
May 26, 7:44 PM EDT	Severe Thunderstorm Warning	OKX	25 min
May 27, 1:25 PM EDT	Coastal Flood Advisory	OKX	62 hr
May 27, 4:28 PM EDT	Rip Current Statement	OKX	3 days
May 28, 4:04 PM EDT	Coastal Flood Advisory	OKX	37 hr
May 28, 11:55 PM EDT	Wind Advisory	OKX	6 hr
May 29, 5:25 AM EDT	Coastal Flood Statement	OKX	24 hr
Jun 3, 5:21 PM EDT	Rip Current Statement	OKX	52 hr
Jun 4, 3:09 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 4, 3:43 PM EDT	Severe Thunderstorm Warning	OKX	47 min
Jun 4, 3:55 PM EDT	Areal Flood Advisory	OKX	95 min
Jun 4, 4:12 PM EDT	Mesoscale Discussion	SPC	93 min
Jun 4, 4:19 PM EDT	Severe Thunderstorm Warning	OKX	41 min
Jun 4, 4:30 PM EDT	Areal Flood Advisory	OKX	90 min
Jun 4, 5:03 PM EDT	Special Weather Statement	OKX	42 min
Jun 5, 4:46 PM EDT	Rip Current Statement	OKX	28 hr
Jun 8, 4:15 PM EDT	Severe Thunderstorm Warning	OKX	43 min
Jun 8, 4:31 PM EDT	Flash Flood Warning	OKX	56 min
Jun 9, 3:19 PM EDT	Mesoscale Discussion	SPC	116 min
Jun 21, 4:46 PM EDT	Rip Current Statement	OKX	52 hr
Jun 22, 5:26 AM EDT	Coastal Flood Statement	OKX	16 hr
Jun 24, 4:01 AM EDT	Coastal Flood Statement	OKX	18 hr
Jun 25, 8:00 PM EDT	Coastal Flood Statement	OKX	3 hr
Jun 26, 3:45 PM EDT	Heat Advisory	OKX	4 days
Jun 26, 5:16 PM EDT	Rip Current Statement	OKX	28 hr
Jun 27, 4:45 PM EDT	Rip Current Statement	OKX	28 hr
Jun 30, 8:31 PM EDT	Special Weather Statement	OKX	44 min
Jun 30, 9:06 PM EDT	Special Weather Statement	OKX	39 min
Jun 30, 9:24 PM EDT	Severe Thunderstorm Warning	OKX	29 min
Jun 30, 9:39 PM EDT	Severe Thunderstorm Warning	OKX	51 min
Jun 30, 10:22 PM EDT	Special Weather Statement	OKX	23 min
Jun 30, 10:45 PM EDT	Special Weather Statement	OKX	45 min
Jul 1, 10:47 AM EDT	Flash Flood Watch	OKX	10 hr
Jul 2, 5:00 AM EDT	Rip Current Statement	OKX	64 hr
Jul 2, 3:18 PM EDT	Areal Flood Advisory	OKX	87 min
Jul 2, 5:56 PM EDT	Areal Flood Advisory	OKX	43 min
Jul 5, 4:08 AM EDT	Heat Advisory	OKX	64 hr
Jul 5, 1:48 PM EDT	Rip Current Statement	OKX	3 days
Jul 6, 12:33 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 6, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 6, 5:25 PM EDT	Mesoscale Discussion	SPC	95 min
Jul 6, 6:28 PM EDT	Severe Thunderstorm Warning	OKX	47 min
Jul 7, 1:50 PM EDT	Mesoscale Discussion	SPC	115 min
Jul 7, 2:41 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 7, 4:28 PM EDT	Flash Flood Watch	OKX	44 hr
Jul 7, 4:48 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 7, 5:43 PM EDT	Tropical Storm Watch	OKX	12 hr
Jul 8, 5:08 AM EDT	Tropical Storm Warning	OKX	33 hr
Jul 8, 1:44 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 8, 2:09 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 8, 2:58 PM EDT	Special Weather Statement	OKX	47 min
Jul 8, 3:53 PM EDT	Flash Flood Warning	OKX	3 hr
Jul 8, 4:00 PM EDT	Special Weather Statement	OKX	45 min
Jul 8, 4:36 PM EDT	Mesoscale Discussion	SPC	114 min
Jul 8, 5:03 PM EDT	Special Weather Statement	OKX	42 min
Jul 8, 5:16 PM EDT	Severe Thunderstorm Warning	OKX	44 min
Jul 8, 5:38 PM EDT	Areal Flood Advisory	OKX	3 hr
Jul 8, 6:59 PM EDT	Areal Flood Advisory	OKX	90 min
Jul 8, 7:17 PM EDT	Special Weather Statement	OKX	43 min
Jul 8, 10:01 PM EDT	Mesoscale Discussion	SPC	59 min
Jul 9, 5:30 AM EDT	Areal Flood Advisory	OKX	3 hr
Jul 9, 8:29 AM EDT	Areal Flood Advisory	OKX	61 min
Jul 9, 8:56 AM EDT	Flash Flood Warning	OKX	3 hr
Jul 9, 3:34 PM EDT	Rip Current Statement	OKX	29 hr
Jul 9, 10:06 PM EDT	Areal Flood Advisory	OKX	116 min
Jul 9, 10:11 PM EDT	Special Weather Statement	OKX	49 min
Jul 11, 4:24 PM EDT	Flash Flood Watch	OKX	35 hr
Jul 12, 2:18 AM EDT	Special Weather Statement	OKX	42 min
Jul 12, 1:32 PM EDT	Mesoscale Discussion	SPC	88 min
Jul 14, 3:20 PM EDT	Heat Advisory	OKX	3 days
Jul 14, 5:03 PM EDT	Special Weather Statement	OKX	42 min
Jul 16, 2:43 PM EDT	Flash Flood Watch	OKX	37 hr
Jul 17, 12:00 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 17, 1:13 PM EDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 17, 4:38 PM EDT	Mesoscale Discussion	SPC	97 min
Jul 18, 12:18 AM EDT	Special Weather Statement	OKX	42 min
Jul 21, 10:32 AM EDT	Mesoscale Discussion	SPC	58 min
Jul 21, 11:56 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 12:50 PM EDT	Special Weather Statement	OKX	40 min
Jul 21, 1:21 PM EDT	Special Weather Statement	OKX	39 min
Jul 21, 4:28 PM EDT	Special Weather Statement	OKX	47 min
Jul 22, 3:35 AM EDT	Coastal Flood Statement	OKX	19 hr
Jul 23, 5:57 AM EDT	Coastal Flood Statement	OKX	20 hr
Jul 24, 4:33 AM EDT	Coastal Flood Statement	OKX	21 hr
Jul 24, 4:26 PM EDT	Rip Current Statement	OKX	29 hr
Jul 25, 10:58 PM EDT	Severe Thunderstorm Warning	OKX	38 min
Jul 26, 1:08 AM EDT	Special Weather Statement	OKX	67 min
Jul 26, 1:13 AM EDT	Areal Flood Advisory	OKX	113 min
Jul 26, 2:15 AM EDT	Special Weather Statement	OKX	60 min
Jul 26, 11:23 AM EDT	Rip Current Statement	OKX	10 hr
Aug 4, 6:32 PM EDT	Rip Current Statement	OKX	50 hr
Aug 8, 3:11 PM EDT	Areal Flood Advisory	OKX	2 hr
Aug 10, 3:53 AM EDT	Excessive Heat Warning	OKX	4 days
Aug 10, 3:53 AM EDT	Heat Advisory	OKX	37 hr
Aug 10, 3:35 PM EDT	Heat Advisory	OKX	3 days
Aug 11, 4:45 PM EDT	Excessive Heat Watch	OKX	23 hr
Aug 12, 5:20 PM EDT	Special Weather Statement	OKX	40 min
Aug 20, 5:29 AM EDT	Storm Surge Watch	OKX	54 hr
Aug 20, 5:29 AM EDT	Tropical Storm Watch	OKX	18 hr
Aug 20, 3:36 PM EDT	Rip Current Statement	OKX	4 days
Aug 20, 5:01 PM EDT	Storm Surge Warning	OKX	47 hr
Aug 20, 5:01 PM EDT	Tropical Storm Warning	OKX	51 hr
Aug 21, 3:02 AM EDT	Flood Watch	OKX	60 hr
Aug 21, 7:36 PM EDT	Areal Flood Advisory	OKX	84 min
Aug 21, 9:03 PM EDT	Areal Flood Advisory	OKX	87 min
Aug 21, 10:37 PM EDT	Areal Flood Advisory	OKX	83 min
Aug 21, 10:47 PM EDT	Flash Flood Warning	OKX	103 min
Aug 22, 2:49 AM EDT	Areal Flood Advisory	OKX	86 min
Aug 22, 1:32 PM EDT	Areal Flood Advisory	OKX	118 min
Aug 22, 3:17 PM EDT	Flash Flood Warning	OKX	2 hr
Aug 22, 4:32 PM EDT	Coastal Flood Statement	OKX	10 hr
Aug 23, 3:16 PM EDT	Heat Advisory	OKX	4 days
Aug 28, 5:48 AM EDT	Areal Flood Advisory	OKX	117 min
Aug 28, 3:24 PM EDT	Areal Flood Advisory	OKX	81 min
Aug 30, 3:06 PM EDT	Flash Flood Watch	OKX	63 hr
Sep 1, 4:28 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 1, 6:22 PM EDT	Tornado Watch	SPC	7 hr
Sep 1, 6:51 PM EDT	Flash Flood Warning	OKX	5 hr
Sep 1, 8:32 PM EDT	Mesoscale Discussion	SPC	88 min
Sep 1, 9:03 PM EDT	Severe Thunderstorm Warning	OKX	42 min
Sep 1, 9:25 PM EDT	Severe Thunderstorm Warning	OKX	65 min
Sep 1, 9:57 PM EDT	Severe Thunderstorm Warning	OKX	48 min
Sep 1, 10:08 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	OKX	4 hr
Sep 1, 10:30 PM EDT	Severe Thunderstorm Warning	OKX	45 min
Sep 1, 10:44 PM EDT	Severe Thunderstorm Warning	OKX	46 min
Sep 1, 11:20 PM EDT	Mesoscale Discussion	SPC	85 min
Sep 2, 12:25 AM EDT	Flash Flood Warning	OKX	4 hr
Sep 2, 2:30 AM EDT	Areal Flood Warning	OKX	8 hr
Sep 2, 2:53 AM EDT	Areal Flood Warning	OKX	7 hr
Sep 2, 3:50 AM EDT	Rip Current Statement	OKX	16 hr
Sep 2, 4:38 AM EDT	Areal Flood Advisory	OKX	3 hr
Sep 2, 10:16 AM EDT	Areal Flood Warning	OKX	25 hr
Sep 7, 3:31 PM EDT	Rip Current Statement	OKX	5 days
Sep 9, 5:06 AM EDT	Coastal Flood Statement	OKX	6 hr
Sep 9, 4:40 PM EDT	High Surf Advisory	OKX	47 hr
Sep 9, 4:57 PM EDT	Coastal Flood Statement	OKX	7 hr
Sep 14, 4:13 PM EDT	Rip Current Statement	OKX	29 hr
Sep 16, 4:58 PM EDT	Rip Current Statement	OKX	52 hr
Sep 18, 9:42 PM EDT	Special Weather Statement	OKX	48 min
Sep 21, 5:12 AM EDT	Rip Current Statement	OKX	4 days
Sep 22, 3:21 PM EDT	Flash Flood Watch	OKX	35 hr
Sep 23, 1:29 PM EDT	Mesoscale Discussion	SPC	61 min
Sep 23, 10:34 PM EDT	Areal Flood Advisory	OKX	3 hr
Sep 26, 3:37 AM EDT	Rip Current Statement	OKX	63 hr
Oct 8, 4:03 PM EDT	Coastal Flood Advisory	OKX	24 hr
Oct 9, 3:56 PM EDT	Coastal Flood Advisory	OKX	25 hr
Oct 10, 5:12 PM EDT	Coastal Flood Statement	OKX	23 hr
Oct 10, 5:12 PM EDT	Coastal Flood Advisory	OKX	24 hr
Oct 11, 4:35 PM EDT	Coastal Flood Advisory	OKX	20 hr
Oct 12, 12:26 PM EDT	Coastal Flood Statement	OKX	4 hr
Oct 16, 5:20 PM EDT	Severe Thunderstorm Warning	OKX	40 min
Oct 16, 5:31 PM EDT	Special Weather Statement	OKX	44 min
Oct 16, 5:39 PM EDT	Mesoscale Discussion	SPC	2 hr
Oct 24, 2:58 PM EDT	Flash Flood Watch	OKX	55 hr
Oct 25, 3:57 AM EDT	Wind Advisory	OKX	60 hr
Oct 25, 4:38 PM EDT	Coastal Flood Advisory	OKX	27 hr
Oct 26, 5:01 AM EDT	Areal Flood Advisory	OKX	3 hr
Oct 26, 7:58 AM EDT	Areal Flood Advisory	OKX	3 hr
Oct 26, 9:26 AM EDT	Special Weather Statement	OKX	94 min
Oct 26, 4:52 PM EDT	Coastal Flood Statement	OKX	22 hr
Oct 26, 4:52 PM EDT	Coastal Flood Advisory	OKX	26 hr
Oct 26, 7:11 PM EDT	Areal Flood Advisory	OKX	3 hr
Oct 27, 5:36 PM EDT	Coastal Flood Statement	OKX	26 hr
Oct 27, 5:36 PM EDT	Coastal Flood Advisory	OKX	25 hr
Oct 28, 4:39 AM EDT	Coastal Flood Advisory	OKX	11 hr
Oct 28, 7:51 PM EDT	Coastal Flood Advisory	OKX	24 hr
Oct 29, 3:47 AM EDT	Wind Advisory	OKX	22 hr
Oct 29, 4:03 AM EDT	Coastal Flood Statement	OKX	11 hr
Oct 29, 4:03 AM EDT	Coastal Flood Advisory	OKX	28 hr
Oct 29, 8:11 PM EDT	Coastal Flood Statement	OKX	23 hr
Oct 30, 4:31 AM EDT	Coastal Flood Statement	OKX	4 hr
Nov 3, 3:58 AM EDT	Frost Advisory	OKX	29 hr
Nov 4, 3:48 PM EDT	Frost Advisory	OKX	17 hr
Nov 4, 3:53 PM EDT	Coastal Flood Statement	OKX	21 hr
Nov 4, 3:53 PM EDT	Coastal Flood Advisory	OKX	19 hr
Nov 5, 5:52 AM EDT	Frost Advisory	OKX	27 hr
Nov 5, 3:25 PM EDT	Coastal Flood Statement	OKX	23 hr
Nov 5, 3:25 PM EDT	Coastal Flood Advisory	OKX	21 hr
Nov 6, 6:43 AM EDT	Frost Advisory	OKX	26 hr
Nov 6, 5:57 PM EDT	Coastal Flood Statement	OKX	21 hr
Nov 6, 5:57 PM EDT	Coastal Flood Advisory	OKX	22 hr
Nov 7, 3:13 AM EST	Frost Advisory	OKX	12 hr
Nov 7, 6:09 PM EST	Coastal Flood Statement	OKX	21 hr
Nov 7, 6:09 PM EST	Coastal Flood Advisory	OKX	21 hr
Nov 12, 11:08 AM EST	Special Weather Statement	OKX	82 min
Nov 13, 12:07 PM EST	Mesoscale Discussion	SPC	113 min
Nov 13, 12:27 PM EST	Severe Thunderstorm Watch	SPC	6 hr
Nov 13, 2:06 PM EST	Mesoscale Discussion	SPC	84 min
Nov 13, 2:22 PM EST	Severe Thunderstorm Warning	OKX	38 min
Nov 13, 2:53 PM EST	Tornado Warning	OKX	37 min
Nov 16, 3:54 AM EST	Frost Advisory	OKX	28 hr
Dec 2, 8:53 PM EST	Special Weather Statement	OKX	67 min
Dec 2, 10:19 PM EST	Special Weather Statement	OKX	56 min
Dec 5, 3:46 PM EST	Coastal Flood Statement	OKX	19 hr
Dec 11, 3:56 AM EST	Wind Advisory	OKX	24 hr
Dec 30, 3:30 PM EST	Coastal Flood Statement	OKX	19 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	18
Tornado Warning	1
Severe Thunderstorm Watch	8
Tornado Watch	1
Mesoscale Discussion	27
Special Weather Statement	33
Flooding
Areal Flood Warning	3
Flash Flood Warning	8
Flash Flood Watch	7
Flood Watch	1
Areal Flood Advisory	24
Winter
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	4
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	6
Cold
Freeze Warning	2
Freeze Watch	2
Frost Advisory	6
Wind and dust
Wind Advisory	11
Fog and smoke
Dense Fog Advisory	3
Tropical
Storm Surge Warning	1
Tropical Storm Warning	2
Storm Surge Watch	1
Tropical Storm Watch	2
Coast and beach
Coastal Flood Warning	4
Coastal Flood Watch	3
Coastal Flood Advisory	19
High Surf Advisory	1
Coastal Flood Statement	32
Rip Current Statement	19

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.