Alert archive / New Jersey / Union County
Weather alerts in Union County, New Jersey, 2025
127 weather alerts in 2025, 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 2025. Tap one for its archive.
- Alerts
- 127
- Warnings
- 28
- Watches
- 19
- Advisories
- 42
- Busiest month
- July36 alerts
- Busiest day
- June 19, 20257 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, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 7 | 50% | 23 | 91% | 20 min |
| Flash flood warnings | 5 | 5 | 0% | 20 | 95% | 102 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New York, NY: severe thunderstorm warnings | 50 | 34 | 32% | 138 | 84% | 24 min |
| NWS New York, NY: flash flood warnings | 26 | 23 | 12% | 94 | 96% | 94 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 8, 11:18 PM EST | Wind Advisory | OKX | 22 hr |
| Jan 17, 3:08 PM EST | Winter Storm Watch | OKX | 24 hr |
| Jan 18, 2:57 PM EST | Winter Storm Warning | OKX | 36 hr |
| Jan 18, 2:57 PM EST | Winter Weather Advisory | OKX | 36 hr |
| Jan 29, 3:09 AM EST | Wind Advisory | OKX | 19 hr |
| Feb 4, 3:09 PM EST | Winter Weather Advisory | OKX | 46 hr |
| Feb 6, 3:18 PM EST | Winter Storm Watch | OKX | 24 hr |
| Feb 7, 3:14 PM EST | Winter Weather Advisory | OKX | 37 hr |
| Feb 8, 6:24 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 12, 1:30 PM EST | Coastal Flood Advisory | OKX | 25 hr |
| Feb 15, 3:25 AM EST | High Wind Watch | OKX | 25 hr |
| Feb 16, 3:59 AM EST | Wind Advisory | OKX | 38 hr |
| Mar 5, 7:54 PM EST | Areal Flood Advisory | OKX | 81 min |
| Mar 6, 3:28 AM EST | Wind Advisory | OKX | 37 hr |
| Mar 30, 6:28 AM EDT | Coastal Flood Statement | OKX | 21 hr |
| Mar 31, 8:24 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Apr 6, 1:07 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Apr 8, 3:17 AM EDT | Freeze Warning | OKX | 30 hr |
| Apr 11, 2:54 PM EDT | Coastal Flood Statement | OKX | 23 hr |
| Apr 11, 2:54 PM EDT | Coastal Flood Statement | OKX | 21 hr |
| Apr 26, 6:12 PM EDT | Special Weather Statement | OKX | 33 min |
| May 3, 5:54 PM EDT | Special Weather Statement | OKX | 21 min |
| May 3, 9:43 PM EDT | Special Weather Statement | OKX | 47 min |
| May 6, 5:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 3:09 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| May 16, 1:08 PM EDT | Areal Flood Advisory | OKX | 82 min |
| May 21, 4:36 PM EDT | Coastal Flood Statement | OKX | 26 hr |
| May 30, 1:35 PM EDT | Flood Watch | OKX | 21 hr |
| Jun 10, 10:42 AM EDT | Areal Flood Advisory | OKX | 93 min |
| Jun 12, 4:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 2:39 PM EDT | Severe Thunderstorm Warning | OKX | 51 min |
| Jun 19, 3:14 PM EDT | Severe Thunderstorm Warning | OKX | 46 min |
| Jun 19, 3:43 PM EDT | Special Weather Statement | OKX | 47 min |
| Jun 19, 4:16 PM EDT | Severe Thunderstorm Warning | OKX | 44 min |
| Jun 19, 4:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 19, 6:39 PM EDT | Severe Thunderstorm Warning | OKX | 36 min |
| Jun 20, 2:10 PM EDT | Extreme Heat Watch | OKX | 47 hr |
| Jun 21, 2:24 AM EDT | Extreme Heat Warning | OKX | 4 days |
| Jun 22, 1:35 PM EDT | Heat Advisory | OKX | 3 days |
| Jun 26, 4:11 AM EDT | Coastal Flood Statement | OKX | 24 hr |
| Jun 26, 4:11 AM EDT | Coastal Flood Advisory | OKX | 23 hr |
| Jun 30, 5:05 PM EDT | Special Weather Statement | OKX | 40 min |
| Jul 1, 5:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 1:30 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 3:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 5:47 PM EDT | Severe Thunderstorm Warning | OKX | 43 min |
| Jul 7, 1:39 PM EDT | Heat Advisory | OKX | 30 hr |
| Jul 7, 3:37 PM EDT | Areal Flood Advisory | OKX | 83 min |
| Jul 8, 2:08 AM EDT | Flood Watch | OKX | 22 hr |
| Jul 8, 12:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 8, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 6:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 14, 1:59 AM EDT | Flood Watch | OKX | 22 hr |
| Jul 14, 1:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 4:04 PM EDT | Areal Flood Advisory | OKX | 15 min |
| Jul 14, 4:13 PM EDT | Flash Flood Warning | OKX | 4 hr |
| Jul 14, 5:25 PM EDT | Flash Flood Warning | OKX | 4 hr |
| Jul 14, 5:30 PM EDT | Special Weather Statement | OKX | 45 min |
| Jul 14, 9:51 PM EDT | Areal Flood Warning | OKX | 2 hr |
| Jul 15, 2:14 PM EDT | Heat Advisory | OKX | 55 hr |
| Jul 20, 2:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 23, 2:16 PM EDT | Extreme Heat Watch | OKX | 12 hr |
| Jul 24, 1:47 AM EDT | Extreme Heat Warning | OKX | 40 hr |
| Jul 25, 1:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 25, 1:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 3:07 PM EDT | Special Weather Statement | OKX | 38 min |
| Jul 25, 3:18 PM EDT | Severe Thunderstorm Warning | OKX | 42 min |
| Jul 25, 3:54 PM EDT | Severe Thunderstorm Warning | OKX | 51 min |
| Jul 25, 4:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 26, 2:23 PM EDT | Heat Advisory | OKX | 4 days |
| Jul 28, 2:40 PM EDT | Extreme Heat Warning | OKX | 53 hr |
| Jul 30, 2:40 PM EDT | Flood Watch | OKX | 30 hr |
| Jul 31, 11:29 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 31, 1:15 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 1:41 PM EDT | Areal Flood Advisory | OKX | 2 hr |
| Jul 31, 1:41 PM EDT | Severe Thunderstorm Warning | OKX | 49 min |
| Jul 31, 1:52 PM EDT | Flash Flood Warning | OKX | 2 hr |
| Jul 31, 2:34 PM EDT | Severe Thunderstorm Warning | OKX | 41 min |
| Aug 13, 12:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 6:21 PM EDT | Special Weather Statement | OKX | 39 min |
| Aug 13, 6:39 PM EDT | Severe Thunderstorm Warning | OKX | 36 min |
| Aug 13, 6:51 PM EDT | Areal Flood Advisory | OKX | 26 min |
| Aug 13, 7:17 PM EDT | Flash Flood Warning | OKX | 46 min |
| Aug 17, 5:34 PM EDT | Special Weather Statement | OKX | 26 min |
| Aug 17, 5:39 PM EDT | Severe Thunderstorm Warning | OKX | 51 min |
| Aug 17, 5:56 PM EDT | Areal Flood Advisory | OKX | 64 min |
| Aug 17, 6:14 PM EDT | Flash Flood Warning | OKX | 81 min |
| Aug 17, 6:23 PM EDT | Special Weather Statement | OKX | 52 min |
| Aug 17, 6:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 20, 3:53 PM EDT | Coastal Flood Advisory | OKX | 33 hr |
| Aug 20, 3:53 PM EDT | Coastal Flood Advisory | OKX | 58 hr |
| Sep 4, 6:50 PM EDT | Special Weather Statement | OKX | 55 min |
| Sep 6, 11:56 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Sep 6, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 6, 2:51 PM EDT | Severe Thunderstorm Warning | OKX | 39 min |
| Sep 6, 3:23 PM EDT | Severe Thunderstorm Warning | OKX | 52 min |
| Sep 10, 4:03 AM EDT | Coastal Flood Advisory | OKX | 11 hr |
| Sep 10, 3:07 PM EDT | Coastal Flood Advisory | OKX | 25 hr |
| Sep 25, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Oct 9, 2:30 PM EDT | Coastal Flood Watch | OKX | 50 hr |
| Oct 10, 3:45 PM EDT | Coastal Flood Warning | OKX | 3 days |
| Oct 11, 3:04 PM EDT | Wind Advisory | OKX | 42 hr |
| Oct 13, 7:55 PM EDT | Coastal Flood Statement | OKX | 21 hr |
| Oct 20, 3:17 AM EDT | Special Weather Statement | OKX | 43 min |
| Oct 26, 2:22 PM EDT | Frost Advisory | OKX | 19 hr |
| Oct 29, 2:41 PM EDT | Coastal Flood Statement | OKX | 29 hr |
| Oct 29, 2:41 PM EDT | Coastal Flood Advisory | OKX | 30 hr |
| Oct 30, 2:45 PM EDT | Wind Advisory | OKX | 33 hr |
| Oct 30, 3:05 PM EDT | Areal Flood Advisory | OKX | 115 min |
| Nov 4, 12:56 PM EST | High Wind Watch | OKX | 24 hr |
| Nov 5, 2:44 AM EST | Wind Advisory | OKX | 26 hr |
| Nov 6, 1:10 AM EST | Frost Advisory | OKX | 31 hr |
| Nov 9, 4:48 PM EST | Freeze Watch | OKX | 9 hr |
| Nov 10, 1:23 AM EST | Freeze Warning | OKX | 32 hr |
| Nov 16, 2:12 PM EST | Wind Advisory | OKX | 7 hr |
| Dec 12, 1:39 PM EST | Winter Weather Advisory | OKX | 49 hr |
| Dec 17, 1:33 PM EST | Wind Advisory | OKX | 58 hr |
| Dec 18, 4:11 AM EST | Coastal Flood Advisory | OKX | 33 hr |
| Dec 19, 3:18 PM EST | Severe Thunderstorm Warning | OKX | 57 min |
| Dec 24, 1:07 PM EST | Winter Storm Watch | OKX | 24 hr |
| Dec 25, 1:19 PM EST | Winter Storm Warning | OKX | 41 hr |
| Dec 26, 4:41 PM EST | Special Weather Statement | OKX | 34 min |
| Dec 26, 6:32 PM EST | Special Weather Statement | OKX | 118 min |
| Dec 27, 1:08 PM EST | Winter Weather Advisory | OKX | 37 hr |
| Dec 29, 6:43 AM EST | Dense Fog Advisory | OKX | 5 hr |
| Dec 29, 12:43 PM EST | Wind Advisory | OKX | 28 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 | 14 |
| Severe Thunderstorm Watch | 6 |
| Mesoscale Discussion | 17 |
| Special Weather Statement | 14 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 5 |
| Flood Watch | 4 |
| Areal Flood Advisory | 12 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 5 |
| Heat | |
| Extreme Heat Warning | 3 |
| Extreme Heat Watch | 2 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Watch | 2 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Watch | 1 |
| Coastal Flood Advisory | 8 |
| Coastal Flood Statement | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.