Alert archive / New Jersey / Union County

Weather alerts in Union County, New Jersey, 2026

175 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Union County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Alerts
175
Warnings
39
Watches
27
Advisories
45
Busiest month
July43 alerts
Busiest day
August 27, 202610 alerts

Over time

By month

Warning verification

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

Union County, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings171418%1782%19 min
Flash flood warnings12118%1392%75 min

Each office's whole area, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS New York, NY: tornado warnings5180%520%3 min
NWS New York, NY: severe thunderstorm warnings776713%25278%23 min
NWS New York, NY: flash flood warnings614920%21990%81 min

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

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 1, 3:00 AM ESTMesoscale DiscussionSPC4 hr
Jan 1, 5:12 AM ESTSnow Squall WarningOKX63 min
Jan 3, 3:27 PM ESTCoastal Flood StatementOKX19 hr
Jan 17, 1:20 PM ESTWinter Weather AdvisoryOKX39 hr
Jan 22, 12:26 PM ESTWinter Storm WatchOKX25 hr
Jan 22, 1:07 PM ESTCold Weather AdvisoryOKX47 hr
Jan 23, 1:12 PM ESTWinter Storm WarningOKX60 hr
Jan 24, 1:44 PM ESTCoastal Flood StatementOKX40 hr
Jan 25, 6:01 AM ESTMesoscale DiscussionSPC6 hr
Jan 25, 11:55 AM ESTMesoscale DiscussionSPC4 hr
Jan 25, 3:02 PM ESTMesoscale DiscussionSPC4 hr
Jan 27, 1:04 AM ESTCold Weather AdvisoryOKX33 hr
Jan 28, 12:33 PM ESTCold Weather AdvisoryOKX17 hr
Jan 29, 12:51 AM ESTCold Weather AdvisoryOKX3 days
Jan 31, 3:32 PM ESTCoastal Flood StatementOKX22 hr
Feb 5, 1:03 PM ESTExtreme Cold WatchOKX13 hr
Feb 6, 2:27 AM ESTExtreme Cold WarningOKX59 hr
Feb 6, 2:27 AM ESTWind AdvisoryOKX46 hr
Feb 8, 1:44 AM ESTCold Weather AdvisoryOKX32 hr
Feb 10, 12:58 AM ESTWinter Weather AdvisoryOKX26 hr
Feb 17, 12:53 PM ESTDense Fog AdvisoryOKX21 hr
Feb 20, 1:12 PM ESTWinter Storm WatchOKX14 hr
Feb 21, 2:44 AM ESTBlizzard WarningOKX62 hr
Feb 21, 2:44 AM ESTWinter Storm WarningOKX23 hr
Feb 21, 2:44 PM ESTCoastal Flood WarningOKX39 hr
Feb 22, 4:58 PM ESTMesoscale DiscussionSPC4 hr
Feb 23, 12:45 AM ESTMesoscale DiscussionSPC5 hr
Mar 3, 5:58 AM ESTMesoscale DiscussionSPC5 hr
Mar 5, 11:20 PM ESTAreal Flood AdvisoryOKX103 min
Mar 7, 1:30 PM ESTDense Fog AdvisoryOKX24 hr
Mar 11, 9:10 PM EDTSpecial Weather StatementOKX35 min
Mar 15, 2:26 PM EDTWind AdvisoryOKX42 hr
Mar 16, 8:32 AM EDTDense Fog AdvisoryOKX2 hr
Mar 16, 10:55 PM EDTMesoscale DiscussionSPC2 hr
Mar 16, 11:01 PM EDTSpecial Weather StatementOKX119 min
Mar 16, 11:54 PM EDTSevere Thunderstorm WarningOKX36 min
Apr 2, 5:08 AM EDTCoastal Flood StatementOKX17 hr
Apr 7, 2:12 AM EDTFreeze WatchOKX12 hr
Apr 7, 2:34 PM EDTFreeze WarningOKX18 hr
Apr 8, 2:30 PM EDTFrost AdvisoryOKX19 hr
Apr 16, 11:15 PM EDTSpecial Weather StatementOKX60 min
Apr 17, 2:31 PM EDTCoastal Flood StatementOKX7 hr
Apr 17, 9:57 PM EDTCoastal Flood AdvisoryOKX28 hr
Apr 19, 2:19 AM EDTFreeze WatchOKX24 hr
Apr 19, 2:18 PM EDTFreeze WarningOKX43 hr
May 18, 2:49 PM EDTHeat AdvisoryOKX53 hr
May 20, 1:52 PM EDTMesoscale DiscussionSPC53 min
May 20, 2:10 PM EDTSevere Thunderstorm WatchSPC7 hr
May 20, 5:29 PM EDTMesoscale DiscussionSPC61 min
May 20, 6:07 PM EDTSevere Thunderstorm WarningOKX53 min
May 20, 6:51 PM EDTSevere Thunderstorm WarningOKX39 min
May 20, 6:57 PM EDTAreal Flood AdvisoryOKX3 hr
Jun 6, 4:17 PM EDTMesoscale DiscussionSPC118 min
Jun 6, 4:45 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 6, 6:36 PM EDTMesoscale DiscussionSPC114 min
Jun 6, 6:45 PM EDTSevere Thunderstorm WarningOKX60 min
Jun 6, 7:27 PM EDTSevere Thunderstorm WarningOKX63 min
Jun 7, 1:37 PM EDTSpecial Weather StatementOKX23 min
Jun 9, 2:39 PM EDTHeat AdvisoryOKX3 days
Jun 11, 3:02 PM EDTMesoscale DiscussionSPC118 min
Jun 11, 6:09 PM EDTMesoscale DiscussionSPC3 hr
Jun 11, 7:14 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 11, 9:44 PM EDTSevere Thunderstorm WarningOKX24 min
Jun 11, 10:24 PM EDTSpecial Weather StatementOKX51 min
Jun 12, 1:48 PM EDTMesoscale DiscussionSPC117 min
Jun 12, 3:04 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 13, 3:33 PM EDTCoastal Flood StatementOKX5 hr
Jun 13, 3:33 PM EDTCoastal Flood AdvisoryOKX33 hr
Jun 14, 3:03 PM EDTCoastal Flood StatementOKX35 hr
Jun 14, 9:25 PM EDTMesoscale DiscussionSPC2 hr
Jun 14, 11:52 PM EDTAreal Flood AdvisoryOKX65 min
Jun 22, 2:07 AM EDTFlood WatchOKX28 hr
Jun 22, 2:54 PM EDTSpecial Weather StatementOKX51 min
Jun 22, 3:06 PM EDTSevere Thunderstorm WarningOKX39 min
Jun 22, 3:40 PM EDTAreal Flood AdvisoryOKX3 hr
Jun 22, 9:46 PM EDTAreal Flood AdvisoryOKX119 min
Jun 22, 10:37 PM EDTFlash Flood WarningOKX2 hr
Jun 28, 2:12 PM EDTExtreme Heat WatchOKX4 days
Jun 30, 2:41 AM EDTExtreme Heat WarningOKX5 days
Jul 1, 2:01 PM EDTMesoscale DiscussionSPC119 min
Jul 1, 6:40 PM EDTMesoscale DiscussionSPC95 min
Jul 3, 3:25 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 3, 6:31 PM EDTMesoscale DiscussionSPC119 min
Jul 3, 7:47 PM EDTSevere Thunderstorm Warning Destructive damage threatOKX28 min
Jul 3, 8:02 PM EDTSevere Thunderstorm Warning Considerable damage threatOKX28 min
Jul 4, 3:28 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 5, 3:51 AM EDTFlood WatchOKX46 hr
Jul 5, 8:56 PM EDTSpecial Weather StatementOKX49 min
Jul 9, 12:38 PM EDTSpecial Weather StatementOKX82 min
Jul 9, 1:08 PM EDTAreal Flood AdvisoryOKX3 hr
Jul 11, 3:47 AM EDTCoastal Flood StatementOKX19 hr
Jul 11, 3:36 PM EDTCoastal Flood StatementOKX32 hr
Jul 13, 2:25 AM EDTHeat AdvisoryOKX64 hr
Jul 15, 3:55 PM EDTMesoscale DiscussionSPC65 min
Jul 15, 4:29 PM EDTSevere Thunderstorm Warning Considerable damage threatOKX46 min
Jul 15, 4:47 PM EDTAreal Flood AdvisoryOKX3 hr
Jul 15, 5:05 PM EDTSevere Thunderstorm WarningOKX40 min
Jul 17, 2:35 PM EDTFlood WatchOKX32 hr
Jul 18, 10:56 AM EDTAreal Flood AdvisoryOKX3 hr
Jul 18, 11:01 AM EDTMesoscale DiscussionSPC89 min
Jul 18, 11:20 AM EDTSpecial Weather StatementOKX40 min
Jul 18, 11:53 AM EDTFlash Flood WarningOKX2 hr
Jul 18, 7:01 PM EDTSpecial Weather StatementOKX44 min
Jul 18, 8:21 PM EDTFlash Flood WarningOKX2 hr
Jul 20, 2:31 PM EDTFlood WatchOKX29 hr
Jul 21, 1:23 PM EDTMesoscale DiscussionSPC2 hr
Jul 21, 2:06 PM EDTTornado WatchSPC7 hr
Jul 21, 3:40 PM EDTMesoscale DiscussionSPC95 min
Jul 27, 2:11 PM EDTMesoscale DiscussionSPC2 hr
Jul 27, 2:49 PM EDTFlood WatchOKX47 hr
Jul 27, 5:27 PM EDTSpecial Weather StatementOKX48 min
Jul 27, 5:58 PM EDTAreal Flood AdvisoryOKX116 min
Jul 27, 7:16 PM EDTMesoscale DiscussionSPC119 min
Jul 28, 12:51 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 28, 2:30 PM EDTMesoscale DiscussionSPC2 hr
Jul 28, 3:16 PM EDTSpecial Weather StatementOKX44 min
Jul 28, 3:20 PM EDTSevere Thunderstorm WarningOKX40 min
Jul 28, 3:25 PM EDTAreal Flood AdvisoryOKX3 hr
Jul 28, 3:38 PM EDTFlash Flood WarningOKX3 hr
Jul 28, 4:06 PM EDTSevere Thunderstorm WarningOKX39 min
Jul 28, 10:47 PM EDTAreal Flood AdvisoryOKX8 min
Jul 28, 10:55 PM EDTFlash Flood WarningOKX3 hr
Aug 2, 2:29 PM EDTFlood WatchOKX24 hr
Aug 3, 12:29 AM EDTMesoscale DiscussionSPC2 hr
Aug 3, 2:28 AM EDTAreal Flood AdvisoryOKX61 min
Aug 3, 2:57 AM EDTAreal Flood AdvisoryOKX3 hr
Aug 3, 3:28 AM EDTMesoscale DiscussionSPC2 hr
Aug 3, 5:22 AM EDTAreal Flood AdvisoryOKX3 hr
Aug 3, 5:41 AM EDTFlash Flood WarningOKX6 hr
Aug 3, 10:43 AM EDTAreal Flood AdvisoryOKX3 hr
Aug 5, 1:44 PM EDTHeat AdvisoryOKX3 days
Aug 5, 5:42 PM EDTAreal Flood AdvisoryOKX108 min
Aug 7, 12:50 PM EDTMesoscale DiscussionSPC2 hr
Aug 7, 1:22 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 7, 4:04 PM EDTMesoscale DiscussionSPC116 min
Aug 7, 5:20 PM EDTSevere Thunderstorm WarningOKX40 min
Aug 7, 5:54 PM EDTFlash Flood WarningOKX2 hr
Aug 9, 2:51 AM EDTHeat AdvisoryOKX36 hr
Aug 10, 1:38 PM EDTMesoscale DiscussionSPC2 hr
Aug 10, 2:10 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 10, 4:19 PM EDTMesoscale DiscussionSPC116 min
Aug 10, 5:12 PM EDTSpecial Weather StatementOKX48 min
Aug 11, 2:40 PM EDTMesoscale DiscussionSPC2 hr
Aug 20, 2:38 AM EDTFlood WatchOKX19 hr
Aug 20, 4:53 PM EDTSpecial Weather StatementOKX52 min
Aug 20, 5:30 PM EDTAreal Flood AdvisoryOKX2 hr
Aug 20, 5:39 PM EDTFlash Flood WarningOKX2 hr
Aug 23, 4:52 AM EDTAreal Flood AdvisoryOKX80 min
Aug 23, 5:53 AM EDTSevere Thunderstorm WarningOKX22 min
Aug 23, 6:12 AM EDTFlash Flood WarningOKX108 min
Aug 26, 2:27 PM EDTFlood WatchOKX29 hr
Aug 27, 8:47 AM EDTSpecial Weather StatementOKX43 min
Aug 27, 10:57 AM EDTMesoscale DiscussionSPC2 hr
Aug 27, 12:27 PM EDTAreal Flood AdvisoryOKX53 min
Aug 27, 12:35 PM EDTFlash Flood WarningOKX2 hr
Aug 27, 12:51 PM EDTSevere Thunderstorm WatchSPC9 hr
Aug 27, 1:30 PM EDTSpecial Weather StatementOKX45 min
Aug 27, 3:15 PM EDTSpecial Weather StatementOKX45 min
Aug 27, 3:28 PM EDTAreal Flood AdvisoryOKX9 min
Aug 27, 3:33 PM EDTFlash Flood WarningOKX3 hr
Aug 27, 3:58 PM EDTSpecial Weather StatementOKX47 min
Sep 1, 3:13 PM EDTMesoscale DiscussionSPC2 hr
Sep 1, 4:32 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 1, 6:22 PM EDTSevere Thunderstorm WarningOKX34 min
Sep 1, 6:32 PM EDTMesoscale DiscussionSPC88 min
Sep 1, 6:50 PM EDTSevere Thunderstorm WarningOKX40 min
Sep 1, 6:56 PM EDTAreal Flood AdvisoryOKX9 min
Sep 1, 7:05 PM EDTFlash Flood WarningOKX82 min
Sep 4, 1:13 AM EDTAreal Flood AdvisoryOKX86 min
Sep 12, 2:20 AM EDTFlood WatchOKX36 hr
Sep 13, 8:18 AM EDTAreal Flood AdvisoryOKX3 hr
Sep 23, 4:43 PM EDTCoastal Flood StatementOKX37 hr
Sep 24, 2:29 PM EDTWind AdvisoryOKX64 hr
Sep 24, 9:08 PM EDTCoastal Flood AdvisoryOKX69 hr
Sep 25, 5:27 AM EDTCoastal Flood WarningOKX61 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 archive2025

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.