Alert archive / New York / Suffolk County

Weather alerts in Suffolk County, New York, 2011

251 weather alerts in 2011, 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 2011. Tap one for its archive.

Alerts
251
Warnings
36
Watches
22
Advisories
122
Busiest month
August48 alerts
Busiest day
August 14, 20119 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 1 tornado warnings covering Suffolk County in 2011 had a tornado report inside them.

Suffolk County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings14750%1385%20 min
Flash flood warnings7357%967%80 min

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS New York, NY: tornado warnings9189%1100%5 min
NWS New York, NY: severe thunderstorm warnings1077530%18571%22 min
NWS New York, NY: flash flood warnings423126%8672%58 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.

IssuedProductOfficeLasted
Jan 2, 4:43 AM ESTDense Fog AdvisoryOKX6 hr
Jan 6, 4:10 AM ESTWinter Storm WatchOKX24 hr
Jan 6, 3:57 PM ESTWinter Weather AdvisoryOKX34 hr
Jan 7, 11:46 AM ESTMesoscale DiscussionSPC4 hr
Jan 8, 4:15 AM ESTWinter Weather AdvisoryOKX24 hr
Jan 10, 3:55 AM ESTWinter Storm WatchOKX24 hr
Jan 10, 4:30 PM ESTWinter Storm WarningOKX49 hr
Jan 11, 8:00 PM ESTMesoscale DiscussionSPC5 hr
Jan 12, 12:45 AM ESTMesoscale DiscussionSPC4 hr
Jan 17, 3:47 PM ESTWinter Weather AdvisoryOKX41 hr
Jan 18, 3:33 AM ESTMesoscale DiscussionSPC6 hr
Jan 20, 3:44 AM ESTWinter Weather AdvisoryOKX30 hr
Jan 23, 4:14 PM ESTWind Chill AdvisoryOKX17 hr
Jan 25, 5:29 AM ESTWinter Storm WatchOKX24 hr
Jan 26, 5:21 AM ESTWinter Storm WarningOKX25 hr
Jan 26, 5:30 AM ESTCoastal Flood StatementOKX24 hr
Jan 26, 11:12 AM ESTMesoscale DiscussionSPC4 hr
Jan 26, 3:59 PM ESTCoastal Flood AdvisoryOKX14 hr
Jan 26, 7:18 PM ESTMesoscale DiscussionSPC5 hr
Jan 31, 3:43 AM ESTWinter Storm WatchOKX25 hr
Jan 31, 4:57 PM ESTWinter Storm WarningOKX18 hr
Feb 1, 4:15 AM ESTWinter Weather AdvisoryOKX12 hr
Feb 1, 11:23 AM ESTIce Storm WarningOKX25 hr
Feb 1, 4:03 PM ESTFreezing Rain AdvisoryOKX11 hr
Feb 1, 11:21 PM ESTMesoscale DiscussionSPC6 hr
Feb 2, 9:42 AM ESTAreal Flood AdvisoryOKX78 min
Feb 2, 11:12 AM ESTDense Fog AdvisoryOKX4 hr
Feb 4, 3:47 AM ESTWinter Weather AdvisoryOKX41 hr
Feb 5, 6:14 PM ESTDense Fog AdvisoryOKX3 hr
Feb 5, 7:08 PM ESTSpecial Weather StatementOKX37 min
Feb 5, 9:02 PM ESTWind AdvisoryOKX8 hr
Feb 14, 4:25 AM ESTWind AdvisoryOKX23 hr
Feb 18, 3:38 AM ESTWind AdvisoryOKX48 hr
Feb 18, 7:28 PM ESTSpecial Weather StatementOKX62 min
Feb 20, 4:28 AM ESTWinter Weather AdvisoryOKX30 hr
Feb 24, 3:40 AM ESTHigh Wind WatchOKX24 hr
Feb 24, 10:34 PM ESTHigh Surf AdvisoryOKX24 hr
Feb 25, 4:04 AM ESTHigh Wind WarningOKX18 hr
Feb 25, 9:31 AM ESTAreal Flood AdvisoryOKX119 min
Feb 25, 11:24 AM ESTAreal Flood AdvisoryOKX4 hr
Feb 27, 4:21 PM ESTFlood WatchOKX23 hr
Feb 28, 4:03 AM ESTWind AdvisoryOKX12 hr
Feb 28, 10:57 AM ESTSpecial Weather StatementOKX48 min
Mar 6, 7:57 PM ESTWind AdvisoryOKX7 hr
Mar 6, 9:57 PM ESTAreal Flood AdvisoryOKX4 hr
Mar 10, 4:55 AM ESTCoastal Flood AdvisoryOKX20 hr
Mar 10, 4:55 AM ESTCoastal Flood AdvisoryOKX14 hr
Mar 10, 10:31 PM ESTWind AdvisoryOKX5 hr
Mar 11, 3:14 AM ESTAreal Flood AdvisoryOKX5 hr
Mar 11, 7:50 AM ESTAreal Flood AdvisoryOKX3 hr
Mar 22, 3:49 PM EDTWinter Weather AdvisoryOKX39 hr
Apr 4, 3:42 PM EDTWind AdvisoryOKX22 hr
Apr 5, 4:17 AM EDTHigh Surf AdvisoryOKX23 hr
Apr 5, 8:43 AM EDTDense Fog AdvisoryOKX3 hr
Apr 10, 11:05 PM EDTDense Fog AdvisoryOKX5 hr
Apr 11, 7:36 AM EDTDense Fog AdvisoryOKX4 hr
Apr 11, 12:19 PM EDTDense Fog AdvisoryOKX101 min
Apr 11, 3:56 PM EDTDense Fog AdvisoryOKX7 hr
Apr 12, 11:23 PM EDTMesoscale DiscussionSPC97 min
Apr 15, 3:20 PM EDTCoastal Flood WatchOKX13 hr
Apr 16, 3:34 AM EDTWind AdvisoryOKX24 hr
Apr 16, 4:09 AM EDTCoastal Flood WarningOKX20 hr
Apr 16, 5:24 PM EDTCoastal Flood AdvisoryOKX7 hr
Apr 16, 5:24 PM EDTHigh Surf AdvisoryOKX19 hr
Apr 16, 10:46 PM EDTAreal Flood AdvisoryOKX4 hr
Apr 16, 11:24 PM EDTSpecial Weather StatementOKX66 min
Apr 17, 2:41 AM EDTAreal Flood AdvisoryOKX3 hr
Apr 17, 9:15 PM EDTSpecial Weather StatementOKX30 min
Apr 19, 3:31 PM EDTCoastal Flood StatementOKX10 hr
Apr 20, 7:44 AM EDTDense Fog AdvisoryOKX6 hr
Apr 23, 6:11 PM EDTDense Fog AdvisoryOKX15 hr
Apr 25, 5:22 PM EDTDense Fog AdvisoryOKX5 hr
Apr 28, 4:35 AM EDTHigh Surf AdvisoryOKX21 hr
Apr 28, 7:25 AM EDTDense Fog AdvisoryOKX8 hr
Apr 28, 3:25 PM EDTSpecial Weather StatementOKX35 min
May 15, 4:04 AM EDTCoastal Flood AdvisoryOKX20 hr
May 16, 4:59 AM EDTCoastal Flood AdvisoryOKX20 hr
May 16, 3:16 PM EDTCoastal Flood WatchOKX24 hr
May 16, 3:25 PM EDTFlood WatchOKX60 hr
May 17, 9:39 AM EDTAreal Flood AdvisoryOKX3 hr
May 17, 2:01 PM EDTAreal Flood AdvisoryOKX3 hr
May 17, 3:02 PM EDTCoastal Flood AdvisoryOKX11 hr
May 17, 5:43 PM EDTAreal Flood AdvisoryOKX107 min
May 17, 7:29 PM EDTAreal Flood AdvisoryOKX2 hr
May 17, 9:44 PM EDTFlash Flood WarningOKX2 hr
May 18, 12:36 AM EDTAreal Flood AdvisoryOKX54 min
May 18, 3:43 AM EDTCoastal Flood AdvisoryOKX23 hr
May 18, 4:31 PM EDTAreal Flood AdvisoryOKX89 min
May 18, 6:14 PM EDTAreal Flood AdvisoryOKX61 min
May 19, 11:18 PM EDTDense Fog AdvisoryOKX8 hr
May 21, 1:11 AM EDTDense Fog AdvisoryOKX8 hr
May 26, 4:47 AM EDTDense Fog AdvisoryOKX5 hr
May 26, 4:40 PM EDTRip Current StatementOKX28 hr
May 26, 8:45 PM EDTDense Fog AdvisoryOKX5 hr
May 27, 2:02 AM EDTDense Fog AdvisoryOKX7 hr
May 30, 6:42 AM EDTSpecial Weather StatementOKX63 min
Jun 1, 4:33 AM EDTRip Current StatementOKX16 hr
Jun 1, 6:31 PM EDTSpecial Weather StatementOKX59 min
Jun 1, 6:55 PM EDTSevere Thunderstorm WarningOKX35 min
Jun 1, 7:09 PM EDTMesoscale DiscussionSPC96 min
Jun 4, 5:40 PM EDTRip Current StatementOKX27 hr
Jun 9, 2:47 AM EDTSpecial Weather StatementOKX28 min
Jun 9, 1:45 PM EDTMesoscale DiscussionSPC90 min
Jun 9, 2:34 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 9, 6:14 PM EDTSpecial Weather StatementOKX61 min
Jun 9, 7:17 PM EDTMesoscale DiscussionSPC58 min
Jun 11, 7:17 PM EDTCoastal Flood StatementOKX3 hr
Jun 13, 3:36 PM EDTCoastal Flood StatementOKX8 hr
Jun 14, 4:50 AM EDTCoastal Flood AdvisoryOKX20 hr
Jun 14, 6:05 AM EDTRip Current StatementOKX15 hr
Jun 15, 3:57 AM EDTCoastal Flood AdvisoryOKX22 hr
Jun 17, 8:16 AM EDTAreal Flood AdvisoryOKX89 min
Jun 17, 9:53 AM EDTAreal Flood AdvisoryOKX52 min
Jun 17, 4:03 PM EDTAreal Flood AdvisoryOKX87 min
Jun 17, 5:42 PM EDTAreal Flood AdvisoryOKX3 hr
Jun 17, 6:21 PM EDTSpecial Weather StatementOKX39 min
Jun 18, 4:48 AM EDTRip Current StatementOKX16 hr
Jun 19, 4:18 AM EDTRip Current StatementOKX17 hr
Jun 23, 1:24 PM EDTAreal Flood AdvisoryOKX66 min
Jun 23, 1:58 PM EDTSpecial Weather StatementOKX62 min
Jun 23, 2:03 PM EDTFlash Flood WarningOKX117 min
Jun 23, 3:38 PM EDTFlash Flood WarningOKX118 min
Jun 29, 12:57 AM EDTSpecial Weather StatementOKX2 hr
Jun 29, 1:31 AM EDTSpecial Weather StatementOKX89 min
Jun 29, 3:18 AM EDTSpecial Weather StatementOKX57 min
Jul 3, 3:12 PM EDTRip Current StatementOKX54 hr
Jul 6, 6:44 AM EDTDense Fog AdvisoryOKX3 hr
Jul 7, 4:44 PM EDTAreal Flood AdvisoryOKX46 min
Jul 7, 4:49 PM EDTSevere Thunderstorm WarningOKX41 min
Jul 7, 5:39 PM EDTSpecial Weather StatementOKX36 min
Jul 8, 1:51 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 10, 12:00 PM EDTRip Current StatementOKX10 hr
Jul 10, 3:42 PM EDTHeat AdvisoryOKX51 hr
Jul 11, 5:09 PM EDTRip Current StatementOKX28 hr
Jul 14, 4:37 AM EDTCoastal Flood StatementOKX20 hr
Jul 18, 11:17 PM EDTAreal Flood AdvisoryOKX58 min
Jul 20, 4:05 PM EDTExcessive Heat WarningOKX54 hr
Jul 21, 3:33 PM EDTHeat AdvisoryOKX30 hr
Jul 22, 3:34 PM EDTHeat AdvisoryOKX28 hr
Jul 26, 6:24 PM EDTSpecial Weather StatementOKX51 min
Jul 26, 7:27 PM EDTSevere Thunderstorm WarningOKX23 min
Jul 26, 8:10 PM EDTMesoscale DiscussionSPC65 min
Jul 26, 9:13 PM EDTSevere Thunderstorm WarningOKX47 min
Jul 26, 9:22 PM EDTSpecial Weather StatementOKX53 min
Jul 29, 6:42 PM EDTSevere Thunderstorm WarningOKX48 min
Aug 1, 2:21 PM EDTSevere Thunderstorm WarningOKX39 min
Aug 1, 2:34 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 1, 6:18 PM EDTMesoscale DiscussionSPC57 min
Aug 1, 6:26 PM EDTSevere Thunderstorm WarningOKX49 min
Aug 1, 7:18 PM EDTSpecial Weather StatementOKX57 min
Aug 1, 7:36 PM EDTSevere Thunderstorm WarningOKX54 min
Aug 1, 8:30 PM EDTSevere Thunderstorm WarningOKX23 min
Aug 7, 10:28 AM EDTAreal Flood AdvisoryOKX2 hr
Aug 8, 5:28 PM EDTSpecial Weather StatementOKX32 min
Aug 8, 9:07 PM EDTSpecial Weather StatementOKX23 min
Aug 14, 4:53 AM EDTAreal Flood AdvisoryOKX112 min
Aug 14, 6:08 AM EDTAreal Flood AdvisoryOKX4 hr
Aug 14, 9:20 AM EDTFlash Flood WatchOKX34 hr
Aug 14, 10:00 AM EDTAreal Flood AdvisoryOKX23 min
Aug 14, 10:18 AM EDTFlash Flood WarningOKX4 hr
Aug 14, 4:05 PM EDTAreal Flood AdvisoryOKX55 min
Aug 14, 4:09 PM EDTAreal Flood AdvisoryOKX66 min
Aug 14, 5:03 PM EDTFlash Flood WarningOKX57 min
Aug 14, 6:06 PM EDTAreal Flood AdvisoryOKX54 min
Aug 15, 4:47 AM EDTAreal Flood AdvisoryOKX4 hr
Aug 15, 9:09 AM EDTAreal Flood AdvisoryOKX3 hr
Aug 18, 8:30 PM EDTAreal Flood AdvisoryOKX60 min
Aug 18, 8:45 PM EDTSevere Thunderstorm WarningOKX30 min
Aug 18, 9:33 PM EDTAreal Flood AdvisoryOKX57 min
Aug 18, 9:33 PM EDTSevere Thunderstorm WarningOKX42 min
Aug 18, 10:01 PM EDTSevere Thunderstorm WarningOKX26 min
Aug 20, 7:00 PM EDTTropical Storm WarningNHC8 days
Aug 21, 5:00 AM EDTHurricane WatchNHC5 days
Aug 21, 11:00 AM EDTHurricane WarningNHC7 days
Aug 21, 12:52 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 21, 4:47 PM EDTSevere Thunderstorm WarningOKX17 min
Aug 21, 9:23 PM EDTSpecial Weather StatementOKX37 min
Aug 21, 9:33 PM EDTFlash Flood WarningOKX39 min
Aug 24, 5:02 PM EDTRip Current StatementOKX26 hr
Aug 26, 3:49 AM EDTFlood WatchOKX57 hr
Aug 26, 5:39 AM EDTHurricane WatchOKX12 hr
Aug 26, 6:00 PM EDTHurricane WarningOKX41 hr
Aug 26, 6:00 PM EDTTropical Storm WarningOKX53 hr
Aug 27, 6:06 PM EDTAreal Flood AdvisoryOKX6 hr
Aug 27, 7:31 PM EDTMesoscale DiscussionSPC89 min
Aug 27, 7:56 PM EDTTornado WatchSPC9 hr
Aug 28, 12:30 AM EDTMesoscale DiscussionSPC90 min
Aug 28, 3:03 AM EDTAreal Flood AdvisoryOKX6 hr
Aug 28, 4:01 AM EDTMesoscale DiscussionSPC89 min
Aug 28, 4:38 AM EDTTornado WatchSPC5 hr
Aug 28, 4:46 AM EDTTornado WarningOKX29 min
Aug 28, 5:36 AM EDTSpecial Weather StatementOKX24 min
Aug 28, 8:59 AM EDTAreal Flood AdvisoryOKX2 hr
Sep 2, 10:05 AM EDTCoastal Flood StatementOKX7 hr
Sep 5, 4:23 AM EDTFlash Flood WatchOKX35 hr
Sep 5, 5:42 AM EDTRip Current StatementOKX46 hr
Sep 7, 4:05 AM EDTHigh Surf AdvisoryOKX68 hr
Sep 7, 10:42 AM EDTRip Current StatementOKX6 hr
Sep 7, 11:19 PM EDTAreal Flood AdvisoryOKX86 min
Sep 8, 7:50 AM EDTAreal Flood AdvisoryOKX3 hr
Sep 11, 5:40 PM EDTRip Current StatementOKX4 days
Sep 22, 3:23 PM EDTFlood WatchOKX36 hr
Sep 23, 2:37 AM EDTDense Fog AdvisoryOKX6 hr
Sep 23, 8:31 PM EDTAreal Flood WarningOKX4 hr
Sep 23, 10:12 PM EDTAreal Flood AdvisoryOKX3 hr
Sep 26, 5:32 AM EDTDense Fog AdvisoryOKX3 hr
Sep 27, 12:16 AM EDTDense Fog AdvisoryOKX9 hr
Sep 27, 4:05 PM EDTCoastal Flood AdvisoryOKX18 hr
Sep 27, 4:05 PM EDTCoastal Flood AdvisoryOKX21 hr
Sep 28, 3:28 PM EDTCoastal Flood StatementOKX11 hr
Sep 28, 3:28 PM EDTCoastal Flood AdvisoryOKX24 hr
Sep 28, 4:43 PM EDTFlash Flood WarningOKX4 hr
Sep 28, 8:14 PM EDTAreal Flood AdvisoryOKX2 hr
Sep 29, 11:22 AM EDTMesoscale DiscussionSPC83 min
Sep 29, 5:06 PM EDTSpecial Weather StatementOKX54 min
Sep 30, 3:19 AM EDTCoastal Flood StatementOKX11 hr
Sep 30, 6:43 PM EDTAreal Flood AdvisoryOKX2 hr
Oct 1, 4:30 AM EDTCoastal Flood AdvisoryOKX11 hr
Oct 3, 8:46 PM EDTAreal Flood AdvisoryOKX89 min
Oct 13, 4:41 AM EDTCoastal Flood StatementOKX10 hr
Oct 15, 3:44 AM EDTWind AdvisoryOKX13 hr
Oct 19, 4:57 AM EDTCoastal Flood StatementOKX14 hr
Oct 19, 10:38 PM EDTAreal Flood AdvisoryOKX112 min
Oct 25, 3:43 PM EDTCoastal Flood StatementOKX6 hr
Oct 25, 3:43 PM EDTCoastal Flood AdvisoryOKX20 hr
Oct 26, 3:28 AM EDTCoastal Flood StatementOKX5 hr
Oct 26, 12:39 PM EDTCoastal Flood AdvisoryOKX24 hr
Oct 27, 4:06 AM EDTFrost AdvisoryOKX30 hr
Oct 27, 4:41 PM EDTCoastal Flood StatementOKX22 hr
Oct 28, 4:29 PM EDTHigh Wind WatchOKX12 hr
Oct 28, 4:43 PM EDTCoastal Flood AdvisoryOKX35 hr
Oct 29, 4:00 AM EDTCoastal Flood AdvisoryOKX20 hr
Oct 29, 4:00 AM EDTHigh Surf AdvisoryOKX24 hr
Oct 29, 4:32 AM EDTHigh Wind WarningOKX21 hr
Oct 29, 2:21 PM EDTWinter Weather AdvisoryOKX14 hr
Oct 30, 1:08 AM EDTWind AdvisoryOKX3 hr
Oct 30, 3:57 PM EDTFrost AdvisoryOKX17 hr
Oct 30, 3:57 PM EDTFreeze WarningOKX17 hr
Nov 9, 2:50 AM ESTDense Fog AdvisoryOKX6 hr
Nov 22, 3:26 PM ESTCoastal Flood AdvisoryOKX16 hr
Nov 23, 1:08 AM ESTAreal Flood AdvisoryOKX112 min
Nov 23, 3:15 PM ESTCoastal Flood StatementOKX20 hr
Nov 25, 12:49 AM ESTCoastal Flood StatementOKX10 hr
Nov 27, 4:20 AM ESTDense Fog AdvisoryOKX4 hr
Dec 5, 1:11 AM ESTDense Fog AdvisoryOKX9 hr
Dec 5, 5:23 PM ESTDense Fog AdvisoryOKX11 hr
Dec 7, 6:55 PM ESTWind AdvisoryOKX12 hr
Dec 21, 10:55 PM ESTSpecial Weather StatementOKX50 min
Dec 21, 11:29 PM ESTSevere Thunderstorm WarningOKX46 min
Dec 22, 10:49 PM ESTCoastal Flood StatementOKX12 hr
Dec 27, 3:49 AM ESTWind AdvisoryOKX19 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20102012

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.