Alert archive / New Jersey / Morris County
Weather alerts in Morris County, New Jersey, 2025
100 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Morris County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 100
- Warnings
- 30
- Watches
- 19
- Advisories
- 28
- Busiest month
- July38 alerts
- Busiest day
- June 19, 20256 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Morris County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 12 | 8% | 12 | 100% | 27 min |
| Flash flood warnings | 7 | 6 | 14% | 4 | 100% | 84 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 29 | 1 | 97% | 5 | 20% | 0 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 233 | 131 | 44% | 502 | 91% | 23 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 96 | 55 | 43% | 203 | 96% | 67 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, 2:57 PM EST | Wind Advisory | PHI | 34 hr |
| Jan 17, 3:04 PM EST | Winter Storm Watch | PHI | 24 hr |
| Jan 18, 2:49 PM EST | Winter Storm Warning | PHI | 33 hr |
| Jan 19, 3:51 PM EST | Cold Weather Advisory | PHI | 68 hr |
| Jan 19, 4:34 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 28, 1:18 PM EST | Wind Advisory | PHI | 29 hr |
| Jan 30, 3:14 AM EST | Winter Weather Advisory | PHI | 30 hr |
| Feb 4, 2:06 PM EST | Winter Weather Advisory | PHI | 48 hr |
| Feb 7, 1:01 PM EST | Winter Weather Advisory | PHI | 38 hr |
| Feb 8, 6:24 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 11, 3:30 PM EST | Winter Weather Advisory | PHI | 45 hr |
| Feb 14, 3:30 AM EST | Winter Weather Advisory | PHI | 57 hr |
| Feb 15, 2:57 AM EST | High Wind Watch | PHI | 11 hr |
| Feb 15, 2:17 PM EST | High Wind Warning | PHI | 49 hr |
| Feb 17, 2:41 AM EST | Wind Advisory | PHI | 12 hr |
| Mar 6, 1:38 AM EST | Wind Advisory | PHI | 38 hr |
| Mar 31, 3:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Apr 15, 1:09 PM EDT | Wind Advisory | PHI | 7 hr |
| Apr 15, 4:58 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| May 3, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 5:51 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 6, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 6, 2:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 6, 4:37 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 6, 5:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 3:24 PM EDT | Flash Flood Warning | PHI | 4 hr |
| May 14, 5:45 PM EDT | River Flood Warning | PHI | 4 hr |
| May 15, 9:34 PM EDT | Dense Fog Advisory | PHI | 12 hr |
| May 30, 2:13 AM EDT | Flood Watch | PHI | 28 hr |
| May 31, 4:00 AM EDT | Areal Flood Warning | PHI | 9 hr |
| May 31, 6:20 PM EDT | River Flood Warning | PHI | 12 hr |
| Jun 12, 4:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 12:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 19, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 19, 2:44 PM EDT | Severe Thunderstorm Warning | PHI | 31 min |
| Jun 19, 3:14 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jun 19, 3:31 PM EDT | Severe Thunderstorm Warning | PHI | 29 min |
| Jun 19, 6:14 PM EDT | Severe Thunderstorm Warning | PHI | 31 min |
| Jun 20, 2:12 AM EDT | Extreme Heat Watch | PHI | 24 hr |
| Jun 21, 2:06 AM EDT | Extreme Heat Warning | PHI | 5 days |
| Jul 1, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 1, 5:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 12:57 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, 4:02 PM EDT | Severe Thunderstorm Warning | PHI | 43 min |
| Jul 3, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| Jul 3, 5:53 PM EDT | Severe Thunderstorm Warning | PHI | 37 min |
| Jul 7, 2:06 AM EDT | Heat Advisory | PHI | 42 hr |
| Jul 7, 10:59 PM EDT | Flood Watch | PHI | 23 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, 3:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 8, 6:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 13, 1:44 PM EDT | Flood Watch | PHI | 32 hr |
| Jul 14, 1:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 4:49 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Jul 14, 5:25 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 14, 5:36 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 14, 5:47 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 14, 6:45 PM EDT | River Flood Warning | PHI | 13 hr |
| Jul 14, 9:25 PM EDT | Areal Flood Warning | PHI | 16 hr |
| Jul 14, 9:32 PM EDT | Areal Flood Warning | PHI | 3 hr |
| Jul 15, 2:37 PM EDT | Flood Watch | PHI | 34 hr |
| Jul 16, 1:55 AM EDT | Heat Advisory | PHI | 42 hr |
| Jul 20, 2:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 23, 1:41 PM EDT | Heat Advisory | PHI | 55 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, 2:29 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jul 25, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Jul 28, 3:00 AM EDT | Heat Advisory | PHI | 65 hr |
| Jul 30, 2:10 PM EDT | Flood Watch | PHI | 31 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, 1:27 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Jul 31, 1:48 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 31, 2:30 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 13, 12:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | 36 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 25, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Oct 9, 1:56 AM EDT | Frost Advisory | PHI | 31 hr |
| Oct 30, 2:52 PM EDT | Wind Advisory | PHI | 30 hr |
| Nov 4, 1:03 PM EST | High Wind Watch | PHI | 13 hr |
| Nov 5, 2:18 AM EST | Wind Advisory | PHI | 26 hr |
| Nov 15, 7:05 PM EST | Wind Advisory | PHI | 24 hr |
| Dec 1, 1:28 AM EST | Winter Weather Advisory | PHI | 39 hr |
| Dec 2, 9:51 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 12, 1:37 PM EST | Winter Weather Advisory | PHI | 47 hr |
| Dec 17, 2:07 PM EST | Wind Advisory | PHI | 59 hr |
| Dec 19, 2:41 PM EST | Severe Thunderstorm Warning | PHI | 64 min |
| Dec 22, 12:34 PM EST | Winter Weather Advisory | PHI | 25 hr |
| Dec 24, 1:11 PM EST | Winter Storm Watch | PHI | 24 hr |
| Dec 25, 1:14 PM EST | Winter Storm Warning | PHI | 32 hr |
| Dec 25, 1:14 PM EST | Winter Weather Advisory | PHI | 45 hr |
| Dec 27, 1:20 PM EST | Winter Weather Advisory | PHI | 37 hr |
| Dec 28, 1:25 PM EST | Wind Advisory | PHI | 51 hr |
| Dec 28, 9:32 PM EST | Dense Fog Advisory | PHI | 14 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 | 13 |
| Severe Thunderstorm Watch | 9 |
| Mesoscale Discussion | 23 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 7 |
| River Flood Warning | 3 |
| Flood Watch | 5 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 10 |
| Heat | |
| Extreme Heat Warning | 1 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 4 |
| Cold | |
| Cold Weather Advisory | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
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.