Alert archive / New Jersey / Bergen County
Weather alerts in Bergen County, New Jersey, 2020
158 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bergen County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 158
- Warnings
- 36
- Watches
- 21
- Advisories
- 47
- Busiest month
- July37 alerts
- Busiest day
- July 6, 202010 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Bergen County in 2020 had a tornado report inside them.
Bergen County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 18 | 13 | 28% | 27 | 93% | 32 min |
| Flash flood warnings | 6 | 3 | 50% | 7 | 100% | 84 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New York, NY: tornado warnings | 8 | 1 | 88% | 3 | 33% | 2 min |
| NWS New York, NY: severe thunderstorm warnings | 104 | 62 | 40% | 196 | 85% | 26 min |
| NWS New York, NY: flash flood warnings | 30 | 17 | 43% | 64 | 88% | 68 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, 11:36 AM EST | Dense Fog Advisory | OKX | 6 hr |
| Jan 8, 9:08 AM EST | Special Weather Statement | OKX | 37 min |
| Jan 8, 1:44 PM EST | Special Weather Statement | OKX | 46 min |
| Jan 8, 2:33 PM EST | Special Weather Statement | OKX | 42 min |
| Jan 11, 1:12 PM EST | Wind Advisory | OKX | 24 hr |
| Jan 15, 1:19 PM EST | Wind Advisory | OKX | 30 hr |
| Jan 17, 3:54 AM EST | Winter Weather Advisory | OKX | 45 hr |
| Feb 6, 3:37 PM EST | Wind Advisory | OKX | 30 hr |
| Feb 27, 10:08 AM EST | Wind Advisory | OKX | 8 hr |
| Feb 29, 11:24 AM EST | Special Weather Statement | OKX | 51 min |
| Mar 3, 9:18 PM EST | Special Weather Statement | OKX | 57 min |
| Mar 20, 5:40 AM EDT | Dense Fog Advisory | OKX | 8 hr |
| Apr 8, 3:44 PM EDT | Wind Advisory | OKX | 28 hr |
| Apr 9, 11:09 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 9, 12:01 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 10, 3:35 PM EDT | Fire Weather Watch | OKX | 12 hr |
| Apr 11, 3:57 AM EDT | Red Flag Warning | OKX | 15 hr |
| Apr 11, 4:12 PM EDT | High Wind Watch | OKX | 24 hr |
| Apr 12, 3:54 PM EDT | High Wind Warning | OKX | 27 hr |
| Apr 13, 9:35 AM EDT | Areal Flood Advisory | OKX | 115 min |
| Apr 13, 2:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 15, 3:27 PM EDT | Freeze Watch | OKX | 24 hr |
| Apr 16, 3:20 PM EDT | Freeze Warning | OKX | 17 hr |
| Apr 20, 3:51 PM EDT | Wind Advisory | OKX | 30 hr |
| Apr 21, 3:29 AM EDT | Freeze Warning | OKX | 29 hr |
| Apr 21, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 21, 1:40 PM EDT | Special Weather Statement | OKX | 50 min |
| Apr 21, 1:56 PM EDT | Severe Thunderstorm Warning | OKX | 34 min |
| Apr 21, 2:12 PM EDT | Severe Thunderstorm Warning | OKX | 48 min |
| Apr 22, 3:55 AM EDT | Freeze Warning | OKX | 29 hr |
| Apr 27, 3:21 PM EDT | Frost Advisory | OKX | 17 hr |
| Apr 29, 3:46 AM EDT | Flood Watch | OKX | 49 hr |
| Apr 30, 10:47 AM EDT | Wind Advisory | OKX | 12 hr |
| May 11, 4:50 PM EDT | Special Weather Statement | OKX | 40 min |
| May 15, 9:01 PM EDT | Special Weather Statement | OKX | 44 min |
| May 29, 2:12 PM EDT | Special Weather Statement | OKX | 48 min |
| May 29, 6:43 PM EDT | Special Weather Statement | OKX | 47 min |
| May 29, 8:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 3, 6:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 3, 7:48 PM EDT | Severe Thunderstorm Warning | OKX | 42 min |
| Jun 3, 7:57 PM EDT | Severe Thunderstorm Warning | OKX | 48 min |
| Jun 27, 12:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 12:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 28, 1:32 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 28, 4:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 5:24 PM EDT | Severe Thunderstorm Warning | OKX | 51 min |
| Jun 28, 6:18 PM EDT | Special Weather Statement | OKX | 42 min |
| Jun 28, 6:47 PM EDT | Severe Thunderstorm Warning | OKX | 35 min |
| Jun 28, 7:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 29, 5:21 PM EDT | Severe Thunderstorm Warning | OKX | 39 min |
| Jun 29, 5:49 PM EDT | Areal Flood Advisory | OKX | 48 min |
| Jun 30, 11:59 AM EDT | Areal Flood Advisory | OKX | 61 min |
| Jul 3, 3:48 PM EDT | Special Weather Statement | OKX | 57 min |
| Jul 3, 6:54 PM EDT | Special Weather Statement | OKX | 51 min |
| Jul 3, 7:26 PM EDT | Areal Flood Advisory | OKX | 94 min |
| Jul 3, 7:51 PM EDT | Severe Thunderstorm Warning | OKX | 28 min |
| Jul 6, 1:38 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 6, 3:02 PM EDT | Special Weather Statement | OKX | 43 min |
| Jul 6, 3:23 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 6, 3:31 PM EDT | Severe Thunderstorm Warning | OKX | 44 min |
| Jul 6, 3:59 PM EDT | Severe Thunderstorm Warning | OKX | 61 min |
| Jul 6, 4:02 PM EDT | Flash Flood Warning | OKX | 115 min |
| Jul 6, 4:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 6, 4:35 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 6, 4:39 PM EDT | Severe Thunderstorm Warning | OKX | 66 min |
| Jul 6, 4:49 PM EDT | Flash Flood Warning | OKX | 62 min |
| Jul 8, 5:24 AM EDT | Heat Advisory | OKX | 35 hr |
| Jul 8, 2:15 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 8, 3:00 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Jul 9, 4:05 PM EDT | Flash Flood Watch | OKX | 29 hr |
| Jul 10, 1:11 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 10, 1:30 PM EDT | Flash Flood Warning | OKX | 4 hr |
| Jul 10, 4:17 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 11, 2:25 PM EDT | Areal Flood Advisory | OKX | 3 hr |
| Jul 11, 2:47 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Jul 11, 2:51 PM EDT | Flash Flood Warning | OKX | 3 hr |
| Jul 11, 7:05 PM EDT | Special Weather Statement | OKX | 40 min |
| Jul 17, 3:41 PM EDT | Heat Advisory | OKX | 3 days |
| Jul 17, 7:57 PM EDT | Areal Flood Advisory | OKX | 2 hr |
| Jul 22, 1:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 2:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 22, 3:27 PM EDT | Heat Advisory | OKX | 28 hr |
| Jul 22, 6:30 PM EDT | Severe Thunderstorm Warning | OKX | 45 min |
| Jul 22, 7:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 23, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 4:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 6:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 25, 2:57 PM EDT | Heat Advisory | OKX | 3 days |
| Jul 30, 1:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 1, 4:21 PM EDT | Heat Advisory | OKX | 28 hr |
| Aug 2, 3:10 PM EDT | Tornado Watch | SPC | 7 hr |
| Aug 2, 3:32 PM EDT | Flash Flood Watch | OKX | 48 hr |
| Aug 2, 6:00 PM EDT | Tropical Storm Watch | OKX | 17 hr |
| Aug 2, 6:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 5:20 AM EDT | Tropical Storm Warning | OKX | 39 hr |
| Aug 3, 9:05 PM EDT | Special Weather Statement | OKX | 40 min |
| Aug 3, 9:31 PM EDT | Special Weather Statement | OKX | 44 min |
| Aug 4, 6:45 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 4, 7:23 AM EDT | Tornado Watch | SPC | 9 hr |
| Aug 4, 11:13 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Aug 4, 11:21 AM EDT | Special Weather Statement | OKX | 39 min |
| Aug 4, 11:51 AM EDT | Areal Flood Advisory | OKX | 3 hr |
| Aug 9, 3:52 PM EDT | Heat Advisory | OKX | 3 days |
| Aug 12, 5:25 AM EDT | Flash Flood Watch | OKX | 13 hr |
| Aug 12, 3:51 PM EDT | Severe Thunderstorm Warning | OKX | 39 min |
| Aug 12, 3:59 PM EDT | Areal Flood Advisory | OKX | 92 min |
| Aug 12, 4:28 PM EDT | Severe Thunderstorm Warning | OKX | 17 min |
| Aug 13, 10:20 AM EDT | Areal Flood Advisory | OKX | 95 min |
| Aug 13, 12:39 PM EDT | Areal Flood Advisory | OKX | 96 min |
| Aug 17, 6:46 PM EDT | Special Weather Statement | OKX | 44 min |
| Aug 17, 7:33 PM EDT | Special Weather Statement | OKX | 57 min |
| Aug 18, 2:17 AM EDT | Special Weather Statement | OKX | 58 min |
| Aug 22, 1:42 PM EDT | Areal Flood Advisory | OKX | 63 min |
| Aug 22, 2:24 PM EDT | Areal Flood Advisory | OKX | 66 min |
| Aug 25, 3:12 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 25, 5:25 PM EDT | Severe Thunderstorm Warning | OKX | 50 min |
| Aug 25, 6:00 PM EDT | Severe Thunderstorm Warning | OKX | 45 min |
| Aug 25, 6:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 6:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 27, 7:27 PM EDT | Special Weather Statement | OKX | 48 min |
| Aug 27, 7:34 PM EDT | Severe Thunderstorm Warning | OKX | 41 min |
| Aug 27, 9:15 PM EDT | Special Weather Statement | OKX | 30 min |
| Aug 29, 6:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 10, 4:55 PM EDT | Areal Flood Advisory | OKX | 2 hr |
| Sep 30, 2:59 AM EDT | Areal Flood Advisory | OKX | 4 hr |
| Sep 30, 3:36 AM EDT | Special Weather Statement | OKX | 54 min |
| Oct 6, 3:15 PM EDT | Wind Advisory | OKX | 31 hr |
| Oct 17, 3:28 AM EDT | Frost Advisory | OKX | 30 hr |
| Oct 21, 12:25 AM EDT | Dense Fog Advisory | OKX | 9 hr |
| Oct 29, 3:29 PM EDT | Freeze Watch | OKX | 12 hr |
| Oct 30, 3:39 AM EDT | Freeze Warning | OKX | 30 hr |
| Nov 1, 3:05 PM EST | Wind Advisory | OKX | 26 hr |
| Nov 1, 5:49 PM EST | Special Weather Statement | OKX | 41 min |
| Nov 1, 6:34 PM EST | Special Weather Statement | OKX | 41 min |
| Nov 15, 3:33 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 15, 6:52 PM EST | Mesoscale Discussion | SPC | 113 min |
| Nov 15, 7:01 PM EST | Mesoscale Discussion | SPC | 59 min |
| Nov 15, 7:32 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Nov 15, 7:57 PM EST | Severe Thunderstorm Warning | OKX | 63 min |
| Nov 15, 8:36 PM EST | Tornado Warning | OKX | 24 min |
| Nov 30, 10:54 AM EST | Wind Advisory | OKX | 11 hr |
| Nov 30, 4:37 PM EST | Mesoscale Discussion | SPC | 53 min |
| Nov 30, 5:49 PM EST | Special Weather Statement | OKX | 56 min |
| Nov 30, 5:56 PM EST | Areal Flood Advisory | OKX | 3 hr |
| Nov 30, 6:48 PM EST | Special Weather Statement | OKX | 87 min |
| Dec 12, 6:27 PM EST | Dense Fog Advisory | OKX | 17 min |
| Dec 12, 6:44 PM EST | Dense Fog Advisory | OKX | 3 hr |
| Dec 13, 12:03 AM EST | Dense Fog Advisory | OKX | 9 hr |
| Dec 14, 4:00 PM EST | Winter Storm Watch | OKX | 36 hr |
| Dec 15, 3:40 PM EST | Winter Storm Warning | OKX | 45 hr |
| Dec 16, 5:31 PM EST | Special Weather Statement | OKX | 74 min |
| Dec 16, 6:48 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 23, 2:43 PM EST | Flood Watch | OKX | 43 hr |
| Dec 23, 2:55 PM EST | High Wind Warning | OKX | 41 hr |
| Dec 23, 2:55 PM EST | Wind Advisory | OKX | 35 hr |
| Dec 25, 1:26 AM EST | Areal Flood Advisory | OKX | 58 min |
| Dec 25, 2:07 AM EST | Areal Flood Warning | OKX | 7 hr |
| Dec 25, 10:55 AM EST | River Flood Warning | OKX | 21 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 archive20192021
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.