Alert archive / New Jersey / Warren County
Weather alerts in Warren County, New Jersey, 2024
179 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Warren County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 179
- Warnings
- 77
- Watches
- 32
- Advisories
- 41
- Busiest month
- August35 alerts
- Busiest day
- February 17, 202410 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Warren County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 29 | 24 | 17% | 21 | 100% | 24 min |
| Flash flood warnings | 10 | 5 | 50% | 2 | 100% | 35 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 7 | 1 | 86% | 1 | 100% | 13 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 219 | 137 | 37% | 463 | 90% | 23 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 66 | 27 | 59% | 61 | 84% | 86 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 4, 3:40 PM EST | Winter Storm Watch | PHI | 21 hr |
| Jan 5, 12:55 PM EST | Winter Storm Warning | PHI | 38 hr |
| Jan 6, 4:27 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 6, 8:28 PM EST | Special Weather Statement | PHI | 3 hr |
| Jan 7, 3:15 PM EST | Flood Watch | PHI | 60 hr |
| Jan 8, 3:27 PM EST | Wind Advisory | PHI | 33 hr |
| Jan 9, 6:26 PM EST | Areal Flood Warning | PHI | 6 hr |
| Jan 9, 7:22 PM EST | Areal Flood Warning | PHI | 5 hr |
| Jan 10, 12:20 AM EST | Areal Flood Warning | PHI | 8 hr |
| Jan 10, 3:47 AM EST | Wind Advisory | PHI | 12 hr |
| Jan 10, 7:49 AM EST | Areal Flood Warning | PHI | 48 hr |
| Jan 10, 8:21 AM EST | Areal Flood Warning | PHI | 6 hr |
| Jan 11, 1:06 PM EST | Flood Watch | PHI | 39 hr |
| Jan 11, 3:48 PM EST | Wind Advisory | PHI | 49 hr |
| Jan 14, 2:48 AM EST | Wind Advisory | PHI | 15 hr |
| Jan 14, 11:07 AM EST | Snow Squall Warning | PHI | 38 min |
| Jan 14, 11:44 AM EST | Snow Squall Warning | PHI | 61 min |
| Jan 14, 11:49 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 14, 12:24 PM EST | Snow Squall Warning | PHI | 28 min |
| Jan 15, 4:12 AM EST | Winter Weather Advisory | PHI | 35 hr |
| Jan 17, 3:16 PM EST | Winter Weather Advisory | PHI | 53 hr |
| Jan 24, 2:14 PM EST | Dense Fog Advisory | PHI | 11 hr |
| Feb 10, 3:16 PM EST | Winter Storm Watch | PHI | 37 hr |
| Feb 11, 3:16 PM EST | Winter Storm Warning | PHI | 46 hr |
| Feb 15, 3:33 PM EST | Winter Weather Advisory | PHI | 42 hr |
| Feb 16, 10:33 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 17, 2:17 PM EST | Snow Squall Warning | PHI | 28 min |
| Feb 17, 2:24 PM EST | Snow Squall Warning | PHI | 21 min |
| Feb 17, 2:42 PM EST | Snow Squall Warning | PHI | 33 min |
| Feb 17, 2:48 PM EST | Snow Squall Warning | PHI | 27 min |
| Feb 17, 3:17 PM EST | Snow Squall Warning | PHI | 43 min |
| Feb 17, 4:09 PM EST | Snow Squall Warning | PHI | 36 min |
| Feb 17, 4:44 PM EST | Snow Squall Warning | PHI | 46 min |
| Feb 17, 5:01 PM EST | Snow Squall Warning | PHI | 29 min |
| Feb 17, 5:27 PM EST | Snow Squall Warning | PHI | 48 min |
| Feb 27, 3:16 PM EST | Wind Advisory | PHI | 35 hr |
| Mar 8, 1:03 PM EST | Flood Watch | PHI | 37 hr |
| Mar 9, 2:43 PM EST | Wind Advisory | PHI | 51 hr |
| Mar 9, 8:09 PM EST | Areal Flood Advisory | PHI | 3 hr |
| Mar 9, 8:11 PM EST | Areal Flood Advisory | PHI | 3 hr |
| Mar 9, 8:13 PM EST | Areal Flood Advisory | PHI | 5 hr |
| Mar 10, 1:46 PM EDT | Areal Flood Warning | PHI | 114 min |
| Mar 10, 7:43 PM EDT | Special Weather Statement | PHI | 32 min |
| Mar 21, 3:29 PM EDT | Flood Watch | PHI | 51 hr |
| Mar 22, 2:17 PM EDT | Wind Advisory | PHI | 36 hr |
| Mar 23, 12:42 PM EDT | Areal Flood Advisory | PHI | 5 hr |
| Mar 24, 12:17 AM EDT | Areal Flood Warning | PHI | 12 hr |
| Apr 2, 1:59 PM EDT | Flood Watch | PHI | 37 hr |
| Apr 4, 2:20 AM EDT | Areal Flood Warning | PHI | 26 hr |
| Apr 12, 12:13 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Apr 20, 9:37 AM EDT | Frost Advisory | PHI | 22 hr |
| Apr 21, 3:16 PM EDT | Frost Advisory | PHI | 18 hr |
| Apr 22, 9:51 AM EDT | Frost Advisory | PHI | 23 hr |
| Apr 22, 6:36 PM EDT | Freeze Warning | PHI | 14 hr |
| Apr 23, 2:41 PM EDT | Freeze Watch | PHI | 24 hr |
| Apr 24, 2:59 PM EDT | Frost Advisory | PHI | 18 hr |
| Apr 24, 2:59 PM EDT | Freeze Warning | PHI | 15 hr |
| Apr 25, 1:12 AM EDT | Freeze Watch | PHI | 11 hr |
| Apr 25, 12:37 PM EDT | Freeze Warning | PHI | 20 hr |
| Apr 26, 1:59 PM EDT | Frost Advisory | PHI | 19 hr |
| Apr 30, 7:38 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| Apr 30, 8:14 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| May 6, 12:06 AM EDT | Dense Fog Advisory | PHI | 10 hr |
| May 23, 8:21 AM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| May 23, 8:59 AM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| May 27, 11:53 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 27, 7:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 12:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 14, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 14, 4:14 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jun 14, 4:40 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Jun 14, 4:57 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 14, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Jun 14, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| Jun 14, 6:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jun 16, 3:47 AM EDT | Heat Advisory | PHI | 8 days |
| Jun 16, 3:14 PM EDT | Excessive Heat Watch | PHI | 6 days |
| Jun 22, 8:49 PM EDT | Severe Thunderstorm Warning | PHI | 26 min |
| Jun 22, 8:55 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jun 23, 3:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 4:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 26, 6:19 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 6:58 PM EDT | Severe Thunderstorm Warning | PHI | 47 min |
| Jun 26, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jun 26, 7:37 PM EDT | Severe Thunderstorm Warning | PHI | 38 min |
| Jun 29, 5:13 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 30, 9:55 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 11:09 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 30, 1:57 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Jun 30, 2:10 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Jun 30, 2:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 30, 2:42 PM EDT | Severe Thunderstorm Warning | PHI | 63 min |
| Jun 30, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Jul 4, 3:34 AM EDT | Heat Advisory | PHI | 64 hr |
| Jul 7, 2:42 PM EDT | Heat Advisory | PHI | 3 days |
| Jul 9, 3:01 PM EDT | Excessive Heat Warning | PHI | 29 hr |
| Jul 9, 5:02 PM EDT | Severe Thunderstorm Warning | PHI | 43 min |
| Jul 10, 7:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 11, 2:43 PM EDT | Flood Watch | PHI | 43 hr |
| Jul 12, 3:37 PM EDT | Excessive Heat Watch | PHI | 72 hr |
| Jul 12, 3:37 PM EDT | Heat Advisory | PHI | 5 days |
| Jul 14, 12:56 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 14, 3:03 PM EDT | Excessive Heat Warning | PHI | 3 days |
| Jul 16, 2:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 16, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 16, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jul 16, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| Jul 16, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Jul 17, 12:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 17, 2:25 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jul 17, 3:13 PM EDT | Severe Thunderstorm Warning | PHI | 62 min |
| Jul 17, 3:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 17, 6:40 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jul 17, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Jul 17, 7:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 7:18 PM EDT | Flash Flood Warning | PHI | 2 hr |
| Jul 31, 3:56 AM EDT | Heat Advisory | PHI | 64 hr |
| Aug 3, 12:20 PM EDT | Flood Watch | PHI | 9 hr |
| Aug 3, 12:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 3, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 3, 1:27 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Aug 3, 2:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 3, 3:41 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| Aug 5, 3:16 AM EDT | Flood Watch | PHI | 48 hr |
| Aug 6, 9:37 AM EDT | Heat Advisory | PHI | 9 hr |
| Aug 6, 1:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 6, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 6, 4:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 6, 6:37 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 6, 6:57 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 8, 3:13 PM EDT | Wind Advisory | PHI | 27 hr |
| Aug 8, 6:04 PM EDT | Flood Watch | PHI | 24 hr |
| Aug 9, 6:17 AM EDT | Tornado Watch | SPC | 8 hr |
| Aug 9, 10:26 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 9, 1:27 PM EDT | Tornado Watch | SPC | 7 hr |
| Aug 9, 3:31 PM EDT | Flash Flood Warning | PHI | 108 min |
| Aug 9, 4:11 PM EDT | Flash Flood Warning | PHI | 100 min |
| Aug 17, 3:26 PM EDT | Flood Watch | PHI | 33 hr |
| Aug 18, 1:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 18, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 18, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| Aug 18, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 18, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | 34 min |
| Aug 18, 4:56 PM EDT | Flash Flood Warning | PHI | 6 hr |
| Aug 18, 5:10 PM EDT | Severe Thunderstorm Warning | PHI | 29 min |
| Aug 18, 5:31 PM EDT | Flash Flood Warning | PHI | 6 hr |
| Aug 18, 5:38 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 18, 6:01 PM EDT | Flash Flood Warning | PHI | 6 hr |
| Aug 18, 11:52 PM EDT | Areal Flood Warning | PHI | 4 hr |
| Aug 19, 2:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 3:20 PM EDT | Excessive Heat Watch | PHI | 13 hr |
| Aug 27, 3:59 AM EDT | Heat Advisory | PHI | 40 hr |
| Oct 10, 3:19 AM EDT | Frost Advisory | PHI | 30 hr |
| Oct 14, 3:03 PM EDT | Frost Advisory | PHI | 18 hr |
| Oct 15, 1:41 PM EDT | Frost Advisory | PHI | 17 hr |
| Oct 15, 2:24 PM EDT | Freeze Watch | PHI | 12 hr |
| Oct 16, 2:46 AM EDT | Freeze Warning | PHI | 30 hr |
| Oct 25, 3:18 PM EDT | Red Flag Warning | PHI | 28 hr |
| Oct 31, 2:50 PM EDT | Red Flag Warning | PHI | 28 hr |
| Nov 7, 2:54 PM EST | Red Flag Warning | PHI | 27 hr |
| Nov 14, 3:37 PM EST | Fire Weather Watch | PHI | 23 hr |
| Nov 15, 2:28 PM EST | Red Flag Warning | PHI | 28 hr |
| Nov 21, 3:01 PM EST | Winter Weather Advisory | PHI | 28 hr |
| Dec 3, 3:03 PM EST | Wind Advisory | PHI | 55 hr |
| Dec 3, 3:41 PM EST | Snow Squall Warning | PHI | 49 min |
| Dec 3, 4:20 PM EST | Snow Squall Warning | PHI | 25 min |
| Dec 5, 8:39 AM EST | Snow Squall Warning | PHI | 36 min |
| Dec 5, 9:15 AM EST | Snow Squall Warning | PHI | 45 min |
| Dec 5, 9:23 AM EST | Snow Squall Warning | PHI | 52 min |
| Dec 9, 9:43 PM EST | Dense Fog Advisory | PHI | 13 hr |
| Dec 10, 2:42 PM EST | Wind Advisory | PHI | 30 hr |
| Dec 14, 2:38 PM EST | Winter Weather Advisory | PHI | 42 hr |
| Dec 20, 3:09 AM EST | Winter Weather Advisory | PHI | 28 hr |
| Dec 26, 3:14 PM EST | Winter Weather Advisory | PHI | 43 hr |
| Dec 28, 6:16 PM EST | Dense Fog Advisory | PHI | 16 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 | 29 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 2 |
| Flooding | |
| Areal Flood Warning | 9 |
| Flash Flood Warning | 10 |
| Flood Watch | 10 |
| Areal Flood Advisory | 5 |
| Winter | |
| Snow Squall Warning | 17 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 3 |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 3 |
| Frost Advisory | 8 |
| Wind and dust | |
| Wind Advisory | 10 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.