Alert archive / New York / New York County

Weather alerts in New York County, New York, 2021

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

New York County and its neighbors

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

Alerts
179
Warnings
38
Watches
28
Advisories
51
Busiest month
July56 alerts
Busiest day
July 17, 20219 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 New York County in 2021 had a tornado report inside them.

New York County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings161319%6100%26 min
Flash flood warnings11110%8100%143 min

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS New York, NY: tornado warnings16569%1362%8 min
NWS New York, NY: severe thunderstorm warnings885636%19369%24 min
NWS New York, NY: flash flood warnings504510%24991%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.

IssuedProductOfficeLasted
Jan 25, 3:16 PM ESTWinter Weather AdvisoryOKX36 hr
Jan 29, 6:06 AM ESTWind AdvisoryOKX12 hr
Jan 30, 3:40 AM ESTWinter Storm WatchOKX36 hr
Jan 31, 3:44 AM ESTWinter Storm WarningOKX48 hr
Jan 31, 4:01 AM ESTCoastal Flood AdvisoryOKX37 hr
Jan 31, 4:01 AM ESTCoastal Flood AdvisoryOKX48 hr
Feb 1, 7:13 AM ESTMesoscale DiscussionSPC6 hr
Feb 1, 1:43 PM ESTMesoscale DiscussionSPC6 hr
Feb 1, 7:27 PM ESTMesoscale DiscussionSPC6 hr
Feb 2, 6:41 PM ESTCoastal Flood StatementOKX10 hr
Feb 5, 3:29 PM ESTWinter Storm WatchOKX13 hr
Feb 6, 4:00 AM ESTWinter Storm WarningOKX39 hr
Feb 10, 3:30 PM ESTWinter Weather AdvisoryOKX18 hr
Feb 13, 3:18 AM ESTWinter Weather AdvisoryOKX31 hr
Feb 14, 3:32 PM ESTWinter Weather AdvisoryOKX37 hr
Feb 16, 7:19 AM ESTAreal Flood AdvisoryOKX2 hr
Feb 16, 3:42 PM ESTWinter Storm WatchOKX24 hr
Feb 17, 3:55 PM ESTWinter Weather AdvisoryOKX51 hr
Feb 18, 9:47 AM ESTMesoscale DiscussionSPC4 hr
Feb 28, 3:38 PM ESTWind AdvisoryOKX47 hr
Mar 12, 4:23 AM ESTWind AdvisoryOKX26 hr
Mar 13, 3:31 PM ESTWind AdvisoryOKX29 hr
Mar 25, 3:42 PM EDTWind AdvisoryOKX32 hr
Mar 28, 3:54 AM EDTWind AdvisoryOKX34 hr
Mar 28, 7:14 PM EDTSevere Thunderstorm WarningOKX49 min
Apr 1, 3:28 AM EDTFreeze WatchOKX12 hr
Apr 1, 3:18 PM EDTFreeze WatchOKX24 hr
Apr 1, 3:18 PM EDTFreeze WarningOKX19 hr
Apr 2, 3:28 PM EDTFreeze WarningOKX19 hr
Apr 11, 2:40 AM EDTDense Fog AdvisoryOKX7 hr
Apr 21, 11:49 AM EDTMesoscale DiscussionSPC2 hr
Apr 21, 12:28 PM EDTSevere Thunderstorm WatchSPC5 hr
Apr 21, 2:05 PM EDTSpecial Weather StatementOKX85 min
Apr 21, 2:12 PM EDTSevere Thunderstorm WarningOKX48 min
Apr 28, 9:13 PM EDTSpecial Weather StatementOKX32 min
Apr 29, 3:30 PM EDTWind AdvisoryOKX36 hr
May 23, 1:20 PM EDTMesoscale DiscussionSPC115 min
May 26, 2:48 PM EDTSevere Thunderstorm WatchSPC7 hr
May 26, 4:41 PM EDTMesoscale DiscussionSPC64 min
May 26, 6:34 PM EDTMesoscale DiscussionSPC116 min
May 26, 6:45 PM EDTSpecial Weather StatementOKX60 min
May 27, 1:25 PM EDTCoastal Flood StatementOKX38 hr
May 28, 11:55 PM EDTWind AdvisoryOKX6 hr
May 29, 5:25 AM EDTCoastal Flood StatementOKX24 hr
Jun 4, 3:09 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 4, 3:43 PM EDTSevere Thunderstorm WarningOKX47 min
Jun 4, 3:55 PM EDTAreal Flood AdvisoryOKX95 min
Jun 4, 4:12 PM EDTMesoscale DiscussionSPC93 min
Jun 7, 3:23 PM EDTSpecial Weather StatementOKX52 min
Jun 8, 3:29 PM EDTSevere Thunderstorm WarningOKX46 min
Jun 8, 3:49 PM EDTFlash Flood WarningOKX2 hr
Jun 8, 4:15 PM EDTSevere Thunderstorm WarningOKX43 min
Jun 9, 3:19 PM EDTMesoscale DiscussionSPC116 min
Jun 14, 6:18 PM EDTMesoscale DiscussionSPC117 min
Jun 26, 3:45 PM EDTHeat AdvisoryOKX4 days
Jun 30, 8:41 PM EDTSpecial Weather StatementOKX49 min
Jun 30, 9:39 PM EDTSevere Thunderstorm WarningOKX51 min
Jun 30, 9:57 PM EDTSpecial Weather StatementOKX33 min
Jul 1, 10:47 AM EDTFlash Flood WatchOKX10 hr
Jul 2, 1:52 PM EDTAreal Flood AdvisoryOKX47 min
Jul 2, 3:13 PM EDTMesoscale DiscussionSPC92 min
Jul 2, 8:03 PM EDTAreal Flood AdvisoryOKX87 min
Jul 5, 4:08 AM EDTHeat AdvisoryOKX64 hr
Jul 6, 12:33 PM EDTMesoscale DiscussionSPC2 hr
Jul 6, 1:32 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 6, 4:23 PM EDTMesoscale DiscussionSPC97 min
Jul 6, 5:25 PM EDTMesoscale DiscussionSPC95 min
Jul 6, 5:53 PM EDTSevere Thunderstorm WarningOKX37 min
Jul 6, 6:28 PM EDTSevere Thunderstorm WarningOKX47 min
Jul 6, 9:11 PM EDTSpecial Weather StatementOKX49 min
Jul 7, 1:50 PM EDTMesoscale DiscussionSPC115 min
Jul 7, 2:41 PM EDTSevere Thunderstorm WatchSPC10 hr
Jul 7, 4:28 PM EDTFlash Flood WatchOKX44 hr
Jul 7, 4:48 PM EDTMesoscale DiscussionSPC87 min
Jul 8, 1:44 PM EDTMesoscale DiscussionSPC3 hr
Jul 8, 2:09 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 8, 3:19 PM EDTSpecial Weather StatementOKX41 min
Jul 8, 3:53 PM EDTFlash Flood WarningOKX3 hr
Jul 8, 4:36 PM EDTMesoscale DiscussionSPC114 min
Jul 8, 4:37 PM EDTSpecial Weather StatementOKX38 min
Jul 8, 5:06 PM EDTFlash Flood Warning Considerable damage threatOKX3 hr
Jul 8, 6:59 PM EDTAreal Flood AdvisoryOKX90 min
Jul 8, 8:17 PM EDTAreal Flood AdvisoryOKX3 hr
Jul 8, 10:01 PM EDTMesoscale DiscussionSPC59 min
Jul 9, 3:15 AM EDTAreal Flood AdvisoryOKX3 hr
Jul 9, 5:30 AM EDTAreal Flood AdvisoryOKX3 hr
Jul 9, 8:29 AM EDTAreal Flood AdvisoryOKX61 min
Jul 9, 10:06 PM EDTAreal Flood AdvisoryOKX116 min
Jul 9, 10:11 PM EDTSpecial Weather StatementOKX49 min
Jul 10, 8:19 PM EDTAreal Flood AdvisoryOKX64 min
Jul 10, 8:50 PM EDTAreal Flood AdvisoryOKX56 min
Jul 10, 8:54 PM EDTAreal Flood AdvisoryOKX53 min
Jul 11, 4:24 PM EDTFlash Flood WatchOKX35 hr
Jul 12, 2:18 AM EDTSpecial Weather StatementOKX42 min
Jul 12, 1:32 PM EDTMesoscale DiscussionSPC88 min
Jul 12, 3:34 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 12, 4:18 PM EDTAreal Flood AdvisoryOKX52 min
Jul 14, 3:20 PM EDTHeat AdvisoryOKX3 days
Jul 16, 2:43 PM EDTFlash Flood WatchOKX37 hr
Jul 16, 5:51 PM EDTMesoscale DiscussionSPC114 min
Jul 17, 12:00 PM EDTMesoscale DiscussionSPC3 hr
Jul 17, 1:13 PM EDTSpecial Weather StatementOKX32 min
Jul 17, 1:13 PM EDTSevere Thunderstorm WatchSPC10 hr
Jul 17, 2:01 PM EDTSevere Thunderstorm WarningOKX44 min
Jul 17, 2:42 PM EDTSevere Thunderstorm WarningOKX33 min
Jul 17, 3:02 PM EDTMesoscale DiscussionSPC88 min
Jul 17, 3:18 PM EDTSevere Thunderstorm WarningOKX42 min
Jul 17, 4:38 PM EDTMesoscale DiscussionSPC97 min
Jul 17, 6:54 PM EDTMesoscale DiscussionSPC2 hr
Jul 21, 10:32 AM EDTMesoscale DiscussionSPC58 min
Jul 21, 11:56 AM EDTSevere Thunderstorm WatchSPC7 hr
Aug 10, 3:53 AM EDTExcessive Heat WarningOKX4 days
Aug 10, 3:53 AM EDTHeat AdvisoryOKX37 hr
Aug 10, 3:35 PM EDTExcessive Heat WarningOKX3 days
Aug 10, 6:58 PM EDTSpecial Weather StatementOKX47 min
Aug 11, 4:45 PM EDTExcessive Heat WatchOKX23 hr
Aug 11, 6:44 PM EDTMesoscale DiscussionSPC91 min
Aug 11, 8:39 PM EDTAreal Flood AdvisoryOKX2 hr
Aug 11, 9:01 PM EDTSpecial Weather StatementOKX29 min
Aug 12, 4:39 PM EDTSpecial Weather StatementOKX51 min
Aug 20, 5:29 AM EDTTropical Storm WatchOKX18 hr
Aug 20, 5:01 PM EDTTropical Storm WarningOKX51 hr
Aug 21, 3:02 AM EDTFlood WatchOKX60 hr
Aug 21, 7:36 PM EDTAreal Flood AdvisoryOKX84 min
Aug 21, 9:03 PM EDTAreal Flood AdvisoryOKX87 min
Aug 21, 10:18 PM EDTFlash Flood WarningOKX4 hr
Aug 21, 10:37 PM EDTAreal Flood AdvisoryOKX83 min
Aug 21, 10:47 PM EDTFlash Flood WarningOKX103 min
Aug 22, 2:49 AM EDTAreal Flood AdvisoryOKX86 min
Aug 22, 2:44 PM EDTFlash Flood WarningOKX3 hr
Aug 22, 4:51 PM EDTFlash Flood Warning Considerable damage threatOKX6 hr
Aug 22, 11:08 PM EDTAreal Flood WarningOKX8 hr
Aug 23, 3:25 AM EDTAreal Flood AdvisoryOKX4 hr
Aug 23, 3:16 PM EDTHeat AdvisoryOKX4 days
Aug 26, 3:35 PM EDTFlash Flood WatchOKX43 hr
Aug 27, 3:31 PM EDTSpecial Weather StatementOKX44 min
Aug 27, 3:40 PM EDTAreal Flood AdvisoryOKX3 hr
Aug 27, 4:29 PM EDTAreal Flood AdvisoryOKX17 min
Aug 27, 4:46 PM EDTFlash Flood WarningOKX89 min
Aug 27, 5:00 PM EDTSpecial Weather StatementOKX60 min
Aug 30, 3:06 PM EDTFlash Flood WatchOKX63 hr
Sep 1, 4:28 PM EDTMesoscale DiscussionSPC2 hr
Sep 1, 6:22 PM EDTTornado WatchSPC7 hr
Sep 1, 6:34 PM EDTMesoscale DiscussionSPC56 min
Sep 1, 6:51 PM EDTFlash Flood WarningOKX5 hr
Sep 1, 8:32 PM EDTSevere Thunderstorm WarningOKX43 min
Sep 1, 8:32 PM EDTMesoscale DiscussionSPC88 min
Sep 1, 9:03 PM EDTSevere Thunderstorm WarningOKX42 min
Sep 1, 9:06 PM EDTTornado WarningOKX24 min
Sep 1, 9:25 PM EDTSevere Thunderstorm WarningOKX65 min
Sep 1, 9:28 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatOKX2 hr
Sep 1, 11:20 PM EDTMesoscale DiscussionSPC85 min
Sep 1, 11:54 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatOKX3 hr
Sep 2, 2:53 AM EDTAreal Flood WarningOKX7 hr
Sep 13, 9:59 PM EDTSpecial Weather StatementOKX46 min
Sep 22, 3:21 PM EDTFlash Flood WatchOKX35 hr
Sep 23, 1:29 PM EDTMesoscale DiscussionSPC61 min
Sep 23, 7:23 PM EDTAreal Flood AdvisoryOKX5 hr
Oct 8, 4:03 PM EDTCoastal Flood StatementOKX20 hr
Oct 9, 3:56 PM EDTCoastal Flood StatementOKX25 hr
Oct 10, 5:12 PM EDTCoastal Flood StatementOKX23 hr
Oct 16, 5:20 PM EDTSevere Thunderstorm WarningOKX40 min
Oct 24, 2:58 PM EDTFlash Flood WatchOKX55 hr
Oct 26, 3:12 AM EDTAreal Flood AdvisoryOKX5 hr
Oct 26, 7:54 AM EDTAreal Flood AdvisoryOKX4 hr
Oct 26, 7:11 PM EDTAreal Flood AdvisoryOKX3 hr
Oct 29, 3:47 AM EDTWind AdvisoryOKX22 hr
Nov 12, 11:08 AM ESTSpecial Weather StatementOKX82 min
Nov 13, 12:07 PM ESTMesoscale DiscussionSPC113 min
Nov 13, 12:27 PM ESTSevere Thunderstorm WatchSPC6 hr
Nov 13, 1:48 PM ESTSevere Thunderstorm WarningOKX42 min
Nov 16, 3:54 AM ESTFrost AdvisoryOKX28 hr
Nov 19, 3:52 AM ESTFrost AdvisoryOKX29 hr
Nov 21, 3:29 PM ESTFreeze WatchOKX12 hr
Nov 22, 3:37 AM ESTFreeze WarningOKX29 hr
Dec 2, 8:53 PM ESTSpecial Weather StatementOKX67 min
Dec 2, 10:19 PM ESTSpecial Weather StatementOKX56 min
Dec 11, 3:56 AM ESTWind AdvisoryOKX24 hr
Dec 11, 7:29 PM ESTMesoscale DiscussionSPC3 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 archive20202022

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.