Alert archive / New York / Suffolk County

Weather alerts in Suffolk County, New York, 2020

229 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Suffolk County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 229
Warnings: 40
Watches: 14
Advisories: 76
Busiest month: August42 alerts
Busiest day: August 27, 202010 alerts

Over time

By month

Warning verification

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

0 of 2 tornado warnings covering Suffolk County in 2020 had a tornado report inside them.

Suffolk County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	20	14	30%	22	73%	21 min
Flash flood warnings	1	1	0%	3	100%	52 min

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS New York, NY: tornado warnings	8	1	88%	3	33%	2 min
NWS New York, NY: severe thunderstorm warnings	104	62	40%	196	85%	26 min
NWS New York, NY: flash flood warnings	30	17	43%	64	88%	68 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 4, 11:36 AM EST	Dense Fog Advisory	OKX	6 hr
Jan 7, 3:39 PM EST	Wind Advisory	OKX	27 hr
Jan 8, 10:32 AM EST	Snow Squall Warning	OKX	58 min
Jan 11, 1:12 PM EST	Wind Advisory	OKX	24 hr
Jan 15, 1:19 PM EST	Wind Advisory	OKX	30 hr
Jan 17, 3:54 AM EST	Winter Weather Advisory	OKX	45 hr
Jan 24, 3:27 AM EST	Coastal Flood Statement	OKX	36 hr
Jan 24, 3:16 PM EST	Coastal Flood Advisory	OKX	24 hr
Feb 1, 4:30 AM EST	Dense Fog Advisory	OKX	5 hr
Feb 6, 3:37 PM EST	Wind Advisory	OKX	30 hr
Feb 6, 8:13 PM EST	High Wind Warning	OKX	23 hr
Feb 7, 8:27 AM EST	Dense Fog Advisory	OKX	3 hr
Feb 27, 10:08 AM EST	Wind Advisory	OKX	8 hr
Mar 3, 10:59 PM EST	Special Weather Statement	OKX	61 min
Mar 6, 3:57 PM EST	Coastal Flood Statement	OKX	19 hr
Mar 12, 3:40 AM EDT	Coastal Flood Statement	OKX	24 hr
Mar 13, 7:32 AM EDT	Special Weather Statement	OKX	88 min
Mar 20, 5:40 AM EDT	Dense Fog Advisory	OKX	8 hr
Apr 2, 3:47 PM EDT	Coastal Flood Statement	OKX	17 hr
Apr 3, 3:45 AM EDT	Coastal Flood Statement	OKX	19 hr
Apr 3, 3:45 AM EDT	Coastal Flood Advisory	OKX	31 hr
Apr 3, 4:04 PM EDT	Coastal Flood Advisory	OKX	18 hr
Apr 4, 12:16 PM EDT	Coastal Flood Statement	OKX	10 hr
Apr 4, 10:10 PM EDT	Coastal Flood Statement	OKX	12 hr
Apr 6, 3:46 PM EDT	Coastal Flood Statement	OKX	46 hr
Apr 7, 4:25 PM EDT	Coastal Flood Statement	OKX	34 hr
Apr 7, 4:25 PM EDT	Coastal Flood Advisory	OKX	34 hr
Apr 8, 3:39 PM EDT	Coastal Flood Advisory	OKX	22 hr
Apr 8, 3:44 PM EDT	Wind Advisory	OKX	28 hr
Apr 9, 12:01 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 9, 2:15 PM EDT	Severe Thunderstorm Warning	OKX	45 min
Apr 9, 2:40 PM EDT	Mesoscale Discussion	SPC	65 min
Apr 9, 3:00 PM EDT	Special Weather Statement	OKX	45 min
Apr 9, 3:07 PM EDT	Severe Thunderstorm Warning	OKX	38 min
Apr 9, 4:54 PM EDT	Coastal Flood Statement	OKX	9 hr
Apr 11, 4:12 PM EDT	High Wind Watch	OKX	24 hr
Apr 12, 3:54 PM EDT	High Wind Warning	OKX	27 hr
Apr 12, 5:01 PM EDT	Coastal Flood Advisory	OKX	25 hr
Apr 13, 9:41 AM EDT	Areal Flood Advisory	OKX	2 hr
Apr 13, 2:42 PM EDT	Mesoscale Discussion	SPC	93 min
Apr 15, 3:27 PM EDT	Freeze Watch	OKX	24 hr
Apr 16, 3:20 PM EDT	Freeze Warning	OKX	17 hr
Apr 20, 4:22 AM EDT	Frost Advisory	OKX	28 hr
Apr 20, 3:51 PM EDT	Wind Advisory	OKX	30 hr
Apr 21, 3:29 AM EDT	Freeze Warning	OKX	29 hr
Apr 21, 2:56 PM EDT	Severe Thunderstorm Warning	OKX	49 min
Apr 21, 3:29 PM EDT	Mesoscale Discussion	SPC	91 min
Apr 21, 3:40 PM EDT	Severe Thunderstorm Warning	OKX	50 min
Apr 21, 4:11 PM EDT	Severe Thunderstorm Warning	OKX	49 min
Apr 21, 7:10 PM EDT	Special Weather Statement	OKX	50 min
Apr 22, 3:55 AM EDT	Frost Advisory	OKX	29 hr
Apr 30, 4:00 AM EDT	Coastal Flood Statement	OKX	26 hr
Apr 30, 10:47 AM EDT	Wind Advisory	OKX	12 hr
May 4, 2:10 AM EDT	Special Weather Statement	OKX	50 min
May 4, 2:27 AM EDT	Special Weather Statement	OKX	48 min
May 5, 3:37 PM EDT	Coastal Flood Advisory	OKX	33 hr
May 6, 4:52 PM EDT	Coastal Flood Advisory	OKX	33 hr
May 7, 3:41 PM EDT	Coastal Flood Statement	OKX	34 hr
May 7, 3:41 PM EDT	Coastal Flood Advisory	OKX	34 hr
May 11, 3:33 PM EDT	Special Weather Statement	OKX	27 min
May 11, 4:08 PM EDT	Special Weather Statement	OKX	37 min
May 11, 5:17 PM EDT	Special Weather Statement	OKX	43 min
May 12, 2:13 PM EDT	Freeze Warning	OKX	17 hr
May 13, 2:54 PM EDT	Frost Advisory	OKX	17 hr
May 18, 3:34 PM EDT	High Surf Advisory	OKX	72 hr
May 19, 4:29 AM EDT	Coastal Flood Statement	OKX	17 hr
May 21, 5:21 PM EDT	Rip Current Statement	OKX	3 days
May 23, 6:52 AM EDT	Dense Fog Advisory	OKX	3 hr
May 27, 7:53 PM EDT	Dense Fog Advisory	OKX	11 hr
May 28, 3:57 PM EDT	Rip Current Statement	OKX	52 hr
Jun 2, 5:13 PM EDT	Rip Current Statement	OKX	3 days
Jun 3, 3:53 AM EDT	Coastal Flood Statement	OKX	20 hr
Jun 3, 6:46 PM EDT	Coastal Flood Statement	OKX	29 hr
Jun 3, 9:03 PM EDT	Special Weather Statement	OKX	42 min
Jun 4, 6:19 PM EDT	Rip Current Statement	OKX	27 hr
Jun 6, 3:18 PM EDT	Severe Thunderstorm Warning	OKX	26 min
Jun 6, 3:45 PM EDT	Special Weather Statement	OKX	60 min
Jun 6, 4:43 PM EDT	Special Weather Statement	OKX	47 min
Jun 10, 4:02 PM EDT	Rip Current Statement	OKX	29 hr
Jun 11, 3:05 PM EDT	Areal Flood Advisory	OKX	85 min
Jun 12, 5:25 AM EDT	Dense Fog Advisory	OKX	3 hr
Jun 18, 6:07 AM EDT	Dense Fog Advisory	OKX	3 hr
Jun 23, 7:38 PM EDT	Dense Fog Advisory	OKX	8 hr
Jun 26, 5:04 PM EDT	Rip Current Statement	OKX	28 hr
Jun 27, 5:37 PM EDT	Special Weather Statement	OKX	83 min
Jun 28, 12:37 PM EDT	Mesoscale Discussion	SPC	113 min
Jun 28, 12:57 PM EDT	Areal Flood Advisory	OKX	30 min
Jun 28, 4:22 PM EDT	Severe Thunderstorm Warning	OKX	38 min
Jun 28, 5:46 PM EDT	Special Weather Statement	OKX	44 min
Jun 28, 7:20 PM EDT	Mesoscale Discussion	SPC	55 min
Jun 30, 11:20 AM EDT	Areal Flood Advisory	OKX	55 min
Jun 30, 12:13 PM EDT	Areal Flood Advisory	OKX	62 min
Jun 30, 1:49 PM EDT	Special Weather Statement	OKX	56 min
Jun 30, 1:53 PM EDT	Areal Flood Advisory	OKX	66 min
Jun 30, 4:42 PM EDT	Rip Current Statement	OKX	27 hr
Jul 1, 5:09 PM EDT	Special Weather Statement	OKX	66 min
Jul 1, 5:25 PM EDT	Areal Flood Advisory	OKX	2 hr
Jul 1, 5:34 PM EDT	Severe Thunderstorm Warning	OKX	30 min
Jul 1, 6:02 PM EDT	Severe Thunderstorm Warning	OKX	28 min
Jul 1, 6:19 PM EDT	Special Weather Statement	OKX	56 min
Jul 1, 10:21 PM EDT	Special Weather Statement	OKX	39 min
Jul 2, 6:30 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 7:15 PM EDT	Areal Flood Advisory	OKX	100 min
Jul 6, 5:03 PM EDT	Severe Thunderstorm Warning	OKX	42 min
Jul 9, 4:22 AM EDT	Rip Current Statement	OKX	5 days
Jul 9, 4:05 PM EDT	Flash Flood Watch	OKX	29 hr
Jul 9, 5:39 PM EDT	Tropical Storm Warning	OKX	32 hr
Jul 9, 8:35 PM EDT	High Surf Advisory	OKX	48 hr
Jul 9, 10:33 PM EDT	Coastal Flood Statement	OKX	29 hr
Jul 13, 12:35 PM EDT	Special Weather Statement	OKX	40 min
Jul 13, 1:07 PM EDT	Areal Flood Advisory	OKX	83 min
Jul 17, 3:41 PM EDT	Heat Advisory	OKX	3 days
Jul 18, 6:52 AM EDT	Dense Fog Advisory	OKX	2 hr
Jul 22, 1:45 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 22, 3:27 PM EDT	Heat Advisory	OKX	28 hr
Jul 22, 7:01 PM EDT	Mesoscale Discussion	SPC	119 min
Jul 23, 6:48 PM EDT	Mesoscale Discussion	SPC	57 min
Jul 23, 10:00 PM EDT	Special Weather Statement	OKX	30 min
Jul 23, 10:23 PM EDT	Special Weather Statement	OKX	52 min
Jul 23, 11:03 PM EDT	Special Weather Statement	OKX	57 min
Jul 23, 11:48 PM EDT	Areal Flood Advisory	OKX	44 min
Jul 24, 10:20 AM EDT	Areal Flood Advisory	OKX	55 min
Jul 25, 2:57 PM EDT	Heat Advisory	OKX	3 days
Jul 30, 1:20 PM EDT	Mesoscale Discussion	SPC	115 min
Jul 31, 2:30 AM EDT	Severe Thunderstorm Warning	OKX	45 min
Jul 31, 2:57 AM EDT	Special Weather Statement	OKX	63 min
Aug 1, 5:42 AM EDT	Rip Current Statement	OKX	15 hr
Aug 2, 12:31 PM EDT	Rip Current Statement	OKX	3 days
Aug 2, 6:00 PM EDT	Tropical Storm Watch	OKX	17 hr
Aug 3, 5:20 AM EDT	Tropical Storm Warning	OKX	39 hr
Aug 3, 5:55 AM EDT	Coastal Flood Watch	OKX	11 hr
Aug 3, 4:43 PM EDT	Coastal Flood Warning	OKX	24 hr
Aug 3, 4:43 PM EDT	Coastal Flood Advisory	OKX	33 hr
Aug 3, 4:43 PM EDT	High Surf Advisory	OKX	35 hr
Aug 3, 8:56 PM EDT	Severe Thunderstorm Warning	OKX	49 min
Aug 3, 9:17 PM EDT	Special Weather Statement	OKX	43 min
Aug 3, 10:09 PM EDT	Special Weather Statement	OKX	51 min
Aug 4, 6:45 AM EDT	Mesoscale Discussion	SPC	3 hr
Aug 4, 7:23 AM EDT	Tornado Watch	SPC	9 hr
Aug 4, 2:05 PM EDT	Tornado Warning	OKX	25 min
Aug 4, 3:05 PM EDT	Mesoscale Discussion	SPC	85 min
Aug 12, 1:22 PM EDT	Areal Flood Advisory	OKX	83 min
Aug 15, 4:15 PM EDT	Rip Current Statement	OKX	26 hr
Aug 17, 10:18 PM EDT	Special Weather Statement	OKX	42 min
Aug 17, 11:08 PM EDT	Special Weather Statement	OKX	52 min
Aug 18, 3:06 AM EDT	Special Weather Statement	OKX	54 min
Aug 18, 4:39 AM EDT	Special Weather Statement	OKX	51 min
Aug 18, 5:03 AM EDT	Areal Flood Advisory	OKX	47 min
Aug 18, 12:22 PM EDT	Rip Current Statement	OKX	9 hr
Aug 22, 12:29 PM EDT	Rip Current Statement	OKX	9 hr
Aug 25, 11:45 AM EDT	Rip Current Statement	OKX	9 hr
Aug 25, 3:12 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 25, 6:11 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 25, 6:22 PM EDT	Severe Thunderstorm Warning	OKX	38 min
Aug 27, 12:38 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 27, 2:59 PM EDT	Mesoscale Discussion	SPC	61 min
Aug 27, 3:19 PM EDT	Tornado Watch	SPC	5 hr
Aug 27, 4:09 PM EDT	Areal Flood Advisory	OKX	96 min
Aug 27, 4:11 PM EDT	Severe Thunderstorm Warning	OKX	64 min
Aug 27, 5:59 PM EDT	Severe Thunderstorm Warning	OKX	27 min
Aug 27, 6:19 PM EDT	Special Weather Statement	OKX	41 min
Aug 27, 6:36 PM EDT	Special Weather Statement	OKX	54 min
Aug 27, 7:09 PM EDT	Special Weather Statement	OKX	51 min
Aug 27, 7:44 PM EDT	Special Weather Statement	OKX	46 min
Aug 27, 8:06 PM EDT	Severe Thunderstorm Warning	OKX	39 min
Aug 27, 8:14 PM EDT	Severe Thunderstorm Warning	OKX	31 min
Aug 28, 5:38 AM EDT	Rip Current Statement	OKX	40 hr
Aug 31, 4:19 PM EDT	Rip Current Statement	OKX	52 hr
Sep 2, 5:01 PM EDT	Rip Current Statement	OKX	27 hr
Sep 10, 6:19 AM EDT	Areal Flood Advisory	OKX	116 min
Sep 10, 7:15 AM EDT	Flash Flood Warning	OKX	2 hr
Sep 10, 8:37 AM EDT	Areal Flood Advisory	OKX	83 min
Sep 10, 4:15 PM EDT	Rip Current Statement	OKX	6 days
Sep 11, 5:06 PM EDT	Rip Current Statement	OKX	5 days
Sep 13, 4:04 PM EDT	High Surf Advisory	OKX	48 hr
Sep 18, 4:44 PM EDT	Coastal Flood Statement	OKX	47 hr
Sep 18, 4:44 PM EDT	High Surf Advisory	OKX	5 days
Sep 19, 4:41 AM EDT	Rip Current Statement	OKX	5 days
Sep 20, 4:47 PM EDT	Coastal Flood Statement	OKX	24 hr
Sep 21, 6:55 AM EDT	Coastal Flood Statement	OKX	33 hr
Sep 29, 4:32 AM EDT	Wind Advisory	OKX	27 hr
Sep 30, 5:09 AM EDT	Mesoscale Discussion	SPC	96 min
Sep 30, 5:42 AM EDT	High Wind Warning	OKX	2 hr
Oct 6, 3:15 PM EDT	Wind Advisory	OKX	31 hr
Oct 11, 10:04 PM EDT	Coastal Flood Advisory	OKX	21 hr
Oct 12, 9:45 PM EDT	Coastal Flood Statement	OKX	12 hr
Oct 17, 3:28 AM EDT	Frost Advisory	OKX	30 hr
Oct 20, 6:43 AM EDT	Areal Flood Advisory	OKX	2 hr
Oct 21, 12:25 AM EDT	Dense Fog Advisory	OKX	9 hr
Oct 21, 10:23 PM EDT	Dense Fog Advisory	OKX	11 hr
Oct 27, 12:30 AM EDT	Dense Fog Advisory	OKX	5 hr
Oct 29, 6:08 AM EDT	Coastal Flood Advisory	OKX	32 hr
Oct 29, 3:29 PM EDT	Freeze Watch	OKX	12 hr
Oct 30, 3:39 AM EDT	Freeze Warning	OKX	30 hr
Oct 30, 6:48 PM EDT	Coastal Flood Statement	OKX	5 hr
Nov 1, 3:05 PM EST	Wind Advisory	OKX	26 hr
Nov 1, 8:11 PM EST	Special Weather Statement	OKX	34 min
Nov 10, 3:12 AM EST	Dense Fog Advisory	OKX	6 hr
Nov 12, 4:02 AM EST	Coastal Flood Statement	OKX	31 hr
Nov 14, 3:34 PM EST	Wind Advisory	OKX	32 hr
Nov 15, 7:01 PM EST	Mesoscale Discussion	SPC	59 min
Nov 15, 7:32 PM EST	Severe Thunderstorm Watch	SPC	5 hr
Nov 15, 8:41 PM EST	Severe Thunderstorm Warning	OKX	64 min
Nov 15, 9:29 PM EST	Tornado Warning	OKX	31 min
Nov 15, 9:37 PM EST	Mesoscale Discussion	SPC	113 min
Nov 15, 9:39 PM EST	Severe Thunderstorm Warning	OKX	51 min
Nov 15, 10:27 PM EST	Severe Thunderstorm Warning	OKX	33 min
Nov 29, 3:17 PM EST	Wind Advisory	OKX	20 hr
Nov 30, 10:54 AM EST	High Wind Warning	OKX	9 hr
Nov 30, 7:13 PM EST	Mesoscale Discussion	SPC	2 hr
Dec 1, 11:57 AM EST	Coastal Flood Advisory	OKX	2 hr
Dec 4, 4:05 PM EST	Coastal Flood Statement	OKX	24 hr
Dec 5, 3:45 AM EST	Wind Advisory	OKX	12 hr
Dec 12, 5:19 AM EST	Dense Fog Advisory	OKX	5 hr
Dec 14, 4:00 PM EST	Winter Storm Watch	OKX	36 hr
Dec 15, 3:40 PM EST	Winter Storm Warning	OKX	45 hr
Dec 15, 3:41 PM EST	Coastal Flood Watch	OKX	23 hr
Dec 15, 3:41 PM EST	Coastal Flood Advisory	OKX	37 hr
Dec 16, 2:51 PM EST	Coastal Flood Warning	OKX	12 hr
Dec 16, 2:51 PM EST	Coastal Flood Warning	OKX	23 hr
Dec 16, 2:51 PM EST	Coastal Flood Advisory	OKX	23 hr
Dec 16, 5:31 PM EST	Special Weather Statement	OKX	74 min
Dec 17, 1:23 PM EST	Special Weather Statement	OKX	82 min
Dec 22, 3:49 PM EST	High Wind Watch	OKX	23 hr
Dec 23, 2:55 PM EST	High Wind Warning	OKX	41 hr
Dec 24, 4:20 AM EST	Coastal Flood Statement	OKX	23 hr
Dec 24, 4:27 AM EST	Coastal Flood Advisory	OKX	28 hr
Dec 25, 4:35 AM EST	Areal Flood Warning	OKX	5 hr
Dec 25, 4:40 AM EST	Areal Flood Advisory	OKX	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
Severe Thunderstorm Warning	20
Tornado Warning	2
Severe Thunderstorm Watch	3
Tornado Watch	2
Mesoscale Discussion	19
Special Weather Statement	36
Flooding
Areal Flood Warning	1
Flash Flood Warning	1
Flash Flood Watch	1
Areal Flood Advisory	18
Winter
Snow Squall Warning	1
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	1
Heat
Heat Advisory	3
Cold
Freeze Warning	4
Freeze Watch	2
Frost Advisory	4
Wind and dust
High Wind Warning	5
High Wind Watch	2
Wind Advisory	14
Fog and smoke
Dense Fog Advisory	15
Tropical
Tropical Storm Warning	2
Tropical Storm Watch	1
Coast and beach
Coastal Flood Warning	3
Coastal Flood Watch	2
Coastal Flood Advisory	16
High Surf Advisory	5
Coastal Flood Statement	24
Rip Current Statement	20

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2019 2021

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.