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
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 17 | 14 | 18% | 17 | 82% | 19 min |
| Flash flood warnings | 12 | 11 | 8% | 13 | 92% | 75 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New York, NY: tornado warnings | 5 | 1 | 80% | 5 | 20% | 3 min |
| NWS New York, NY: severe thunderstorm warnings | 77 | 67 | 13% | 252 | 78% | 23 min |
| NWS New York, NY: flash flood warnings | 61 | 49 | 20% | 219 | 90% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 3:00 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 1, 5:12 AM EST | Snow Squall Warning | OKX | 63 min |
| Jan 3, 3:27 PM EST | Coastal Flood Statement | OKX | 19 hr |
| Jan 17, 1:20 PM EST | Winter Weather Advisory | OKX | 39 hr |
| Jan 22, 12:26 PM EST | Winter Storm Watch | OKX | 25 hr |
| Jan 22, 1:07 PM EST | Cold Weather Advisory | OKX | 47 hr |
| Jan 23, 1:12 PM EST | Winter Storm Warning | OKX | 60 hr |
| Jan 24, 1:44 PM EST | Coastal Flood Statement | OKX | 40 hr |
| Jan 25, 6:01 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 25, 11:55 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 25, 3:02 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 27, 1:04 AM EST | Cold Weather Advisory | OKX | 33 hr |
| Jan 28, 12:33 PM EST | Cold Weather Advisory | OKX | 17 hr |
| Jan 29, 12:51 AM EST | Cold Weather Advisory | OKX | 3 days |
| Jan 31, 3:32 PM EST | Coastal Flood Statement | OKX | 22 hr |
| Feb 5, 1:03 PM EST | Extreme Cold Watch | OKX | 13 hr |
| Feb 6, 2:27 AM EST | Extreme Cold Warning | OKX | 59 hr |
| Feb 6, 2:27 AM EST | Wind Advisory | OKX | 46 hr |
| Feb 8, 1:44 AM EST | Cold Weather Advisory | OKX | 32 hr |
| Feb 10, 12:58 AM EST | Winter Weather Advisory | OKX | 26 hr |
| Feb 17, 12:53 PM EST | Dense Fog Advisory | OKX | 21 hr |
| Feb 20, 1:12 PM EST | Winter Storm Watch | OKX | 14 hr |
| Feb 21, 2:44 AM EST | Blizzard Warning | OKX | 62 hr |
| Feb 21, 2:44 AM EST | Winter Storm Warning | OKX | 23 hr |
| Feb 21, 2:44 PM EST | Coastal Flood Warning | OKX | 39 hr |
| Feb 22, 4:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 23, 12:45 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 3, 5:58 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 5, 11:20 PM EST | Areal Flood Advisory | OKX | 103 min |
| Mar 7, 1:30 PM EST | Dense Fog Advisory | OKX | 24 hr |
| Mar 11, 9:10 PM EDT | Special Weather Statement | OKX | 35 min |
| Mar 15, 2:26 PM EDT | Wind Advisory | OKX | 42 hr |
| Mar 16, 8:32 AM EDT | Dense Fog Advisory | OKX | 2 hr |
| Mar 16, 10:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 16, 11:01 PM EDT | Special Weather Statement | OKX | 119 min |
| Mar 16, 11:54 PM EDT | Severe Thunderstorm Warning | OKX | 36 min |
| Apr 2, 5:08 AM EDT | Coastal Flood Statement | OKX | 17 hr |
| Apr 7, 2:12 AM EDT | Freeze Watch | OKX | 12 hr |
| Apr 7, 2:34 PM EDT | Freeze Warning | OKX | 18 hr |
| Apr 8, 2:30 PM EDT | Frost Advisory | OKX | 19 hr |
| Apr 16, 11:15 PM EDT | Special Weather Statement | OKX | 60 min |
| Apr 17, 2:31 PM EDT | Coastal Flood Statement | OKX | 7 hr |
| Apr 17, 9:57 PM EDT | Coastal Flood Advisory | OKX | 28 hr |
| Apr 19, 2:19 AM EDT | Freeze Watch | OKX | 24 hr |
| Apr 19, 2:18 PM EDT | Freeze Warning | OKX | 43 hr |
| May 18, 2:49 PM EDT | Heat Advisory | OKX | 53 hr |
| May 20, 1:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 20, 2:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 20, 5:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 20, 6:07 PM EDT | Severe Thunderstorm Warning | OKX | 53 min |
| May 20, 6:51 PM EDT | Severe Thunderstorm Warning | OKX | 39 min |
| May 20, 6:57 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jun 6, 4:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 6, 4:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 6, 6:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 6, 6:45 PM EDT | Severe Thunderstorm Warning | OKX | 60 min |
| Jun 6, 7:27 PM EDT | Severe Thunderstorm Warning | OKX | 63 min |
| Jun 7, 1:37 PM EDT | Special Weather Statement | OKX | 23 min |
| Jun 9, 2:39 PM EDT | Heat Advisory | OKX | 3 days |
| Jun 11, 3:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 11, 6:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 11, 7:14 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 11, 9:44 PM EDT | Severe Thunderstorm Warning | OKX | 24 min |
| Jun 11, 10:24 PM EDT | Special Weather Statement | OKX | 51 min |
| Jun 12, 1:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 12, 3:04 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 13, 3:33 PM EDT | Coastal Flood Statement | OKX | 5 hr |
| Jun 13, 3:33 PM EDT | Coastal Flood Advisory | OKX | 33 hr |
| Jun 14, 3:03 PM EDT | Coastal Flood Statement | OKX | 35 hr |
| Jun 14, 9:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 11:52 PM EDT | Areal Flood Advisory | OKX | 65 min |
| Jun 22, 2:07 AM EDT | Flood Watch | OKX | 28 hr |
| Jun 22, 2:54 PM EDT | Special Weather Statement | OKX | 51 min |
| Jun 22, 3:06 PM EDT | Severe Thunderstorm Warning | OKX | 39 min |
| Jun 22, 3:40 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jun 22, 9:46 PM EDT | Areal Flood Advisory | OKX | 119 min |
| Jun 22, 10:37 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Jun 28, 2:12 PM EDT | Extreme Heat Watch | OKX | 4 days |
| Jun 30, 2:41 AM EDT | Extreme Heat Warning | OKX | 5 days |
| Jul 1, 2:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 1, 6:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 3, 3:25 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 6:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 3, 7:47 PM EDT | Severe Thunderstorm Warning | OKX | 28 min |
| Jul 3, 8:02 PM EDT | Severe Thunderstorm Warning | OKX | 28 min |
| Jul 4, 3:28 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 3:51 AM EDT | Flood Watch | OKX | 46 hr |
| Jul 5, 8:56 PM EDT | Special Weather Statement | OKX | 49 min |
| Jul 9, 12:38 PM EDT | Special Weather Statement | OKX | 82 min |
| Jul 9, 1:08 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 11, 3:47 AM EDT | Coastal Flood Statement | OKX | 19 hr |
| Jul 11, 3:36 PM EDT | Coastal Flood Statement | OKX | 32 hr |
| Jul 13, 2:25 AM EDT | Heat Advisory | OKX | 64 hr |
| Jul 15, 3:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 15, 4:29 PM EDT | Severe Thunderstorm Warning | OKX | 46 min |
| Jul 15, 4:47 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 15, 5:05 PM EDT | Severe Thunderstorm Warning | OKX | 40 min |
| Jul 17, 2:35 PM EDT | Flood Watch | OKX | 32 hr |
| Jul 18, 10:56 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 18, 11:01 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 18, 11:20 AM EDT | Special Weather Statement | OKX | 40 min |
| Jul 18, 11:53 AM EDT | Flash Flood Warning | OKX | 2 hr |
| Jul 18, 7:01 PM EDT | Special Weather Statement | OKX | 44 min |
| Jul 18, 8:21 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Jul 20, 2:31 PM EDT | Flood Watch | OKX | 29 hr |
| Jul 21, 1:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 2:06 PM EDT | Tornado Watch | SPC | 7 hr |
| Jul 21, 3:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 27, 2:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 2:49 PM EDT | Flood Watch | OKX | 47 hr |
| Jul 27, 5:27 PM EDT | Special Weather Statement | OKX | 48 min |
| Jul 27, 5:58 PM EDT | Areal Flood Advisory | OKX | 116 min |
| Jul 27, 7:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 28, 12:51 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 2:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 3:16 PM EDT | Special Weather Statement | OKX | 44 min |
| Jul 28, 3:20 PM EDT | Severe Thunderstorm Warning | OKX | 40 min |
| Jul 28, 3:25 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 28, 3:38 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Jul 28, 4:06 PM EDT | Severe Thunderstorm Warning | OKX | 39 min |
| Jul 28, 10:47 PM EDT | Areal Flood Advisory | OKX | 8 min |
| Jul 28, 10:55 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Aug 2, 2:29 PM EDT | Flood Watch | OKX | 24 hr |
| Aug 3, 12:29 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 2:28 AM EDT | Areal Flood Advisory | OKX | 61 min |
| Aug 3, 2:57 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Aug 3, 3:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 5:22 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Aug 3, 5:41 AM EDT | Flash Flood Warning | OKX | 6 hr |
| Aug 3, 10:43 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Aug 5, 1:44 PM EDT | Heat Advisory | OKX | 3 days |
| Aug 5, 5:42 PM EDT | Areal Flood Advisory | OKX | 108 min |
| Aug 7, 12:50 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 7, 4:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 7, 5:20 PM EDT | Severe Thunderstorm Warning | OKX | 40 min |
| Aug 7, 5:54 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Aug 9, 2:51 AM EDT | Heat Advisory | OKX | 36 hr |
| Aug 10, 1:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 2:10 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 4:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 10, 5:12 PM EDT | Special Weather Statement | OKX | 48 min |
| Aug 11, 2:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 2:38 AM EDT | Flood Watch | OKX | 19 hr |
| Aug 20, 4:53 PM EDT | Special Weather Statement | OKX | 52 min |
| Aug 20, 5:30 PM EDT | Areal Flood Advisory | OKX | 2 hr |
| Aug 20, 5:39 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Aug 23, 4:52 AM EDT | Areal Flood Advisory | OKX | 80 min |
| Aug 23, 5:53 AM EDT | Severe Thunderstorm Warning | OKX | 22 min |
| Aug 23, 6:12 AM EDT | Flash Flood Warning | OKX | 108 min |
| Aug 26, 2:27 PM EDT | Flood Watch | OKX | 29 hr |
| Aug 27, 8:47 AM EDT | Special Weather Statement | OKX | 43 min |
| Aug 27, 10:57 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 12:27 PM EDT | Areal Flood Advisory | OKX | 53 min |
| Aug 27, 12:35 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Aug 27, 12:51 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 27, 1:30 PM EDT | Special Weather Statement | OKX | 45 min |
| Aug 27, 3:15 PM EDT | Special Weather Statement | OKX | 45 min |
| Aug 27, 3:28 PM EDT | Areal Flood Advisory | OKX | 9 min |
| Aug 27, 3:33 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Aug 27, 3:58 PM EDT | Special Weather Statement | OKX | 47 min |
| Sep 1, 3:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 1, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 1, 6:22 PM EDT | Severe Thunderstorm Warning | OKX | 34 min |
| Sep 1, 6:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 1, 6:50 PM EDT | Severe Thunderstorm Warning | OKX | 40 min |
| Sep 1, 6:56 PM EDT | Areal Flood Advisory | OKX | 9 min |
| Sep 1, 7:05 PM EDT | Flash Flood Warning | OKX | 82 min |
| Sep 4, 1:13 AM EDT | Areal Flood Advisory | OKX | 86 min |
| Sep 12, 2:20 AM EDT | Flood Watch | OKX | 36 hr |
| Sep 13, 8:18 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Sep 23, 4:43 PM EDT | Coastal Flood Statement | OKX | 37 hr |
| Sep 24, 2:29 PM EDT | Wind Advisory | OKX | 64 hr |
| Sep 24, 9:08 PM EDT | Coastal Flood Advisory | OKX | 69 hr |
| Sep 25, 5:27 AM EDT | Coastal Flood Warning | OKX | 61 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.