Alert archive / New Jersey / Atlantic County
Weather alerts in Atlantic County, New Jersey, 2009
196 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Atlantic County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 196
- Warnings
- 47
- Watches
- 25
- Advisories
- 78
- Busiest month
- August31 alerts
- Busiest day
- September 11, 200911 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Atlantic County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 27 | 10 | 63% | 6 | 50% | 11 min |
| Flash flood warnings | 3 | 2 | 33% | 6 | 50% | 72 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 13 | 1 | 92% | 2 | 50% | 38 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 235 | 113 | 52% | 260 | 82% | 26 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 67 | 20 | 70% | 69 | 62% | 85 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 7, 8:21 AM EST | Areal Flood Advisory | PHI | 8 hr |
| Jan 27, 3:18 AM EST | Winter Storm Warning | PHI | 40 hr |
| Jan 27, 3:18 AM EST | Winter Weather Advisory | PHI | 27 hr |
| Jan 28, 12:31 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 28, 10:01 AM EST | Dense Fog Advisory | PHI | 7 hr |
| Feb 2, 2:53 PM EST | Winter Storm Watch | PHI | 13 hr |
| Feb 2, 2:53 PM EST | Winter Weather Advisory | PHI | 37 hr |
| Feb 3, 9:40 PM EST | Winter Storm Warning | PHI | 6 hr |
| Feb 11, 2:50 PM EST | Wind Advisory | PHI | 13 hr |
| Feb 11, 10:14 PM EST | Mesoscale Discussion | SPC | 61 min |
| Feb 12, 3:30 AM EST | High Wind Warning | PHI | 16 hr |
| Feb 12, 6:51 PM EST | Wind Advisory | PHI | 5 hr |
| Feb 28, 4:10 AM EST | Winter Storm Watch | PHI | 23 hr |
| Mar 1, 3:30 AM EST | Winter Storm Warning | PHI | 37 hr |
| Mar 1, 4:07 PM EST | Coastal Flood Advisory | PHI | 13 hr |
| Mar 1, 9:09 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 9, 4:12 AM EDT | Wind Advisory | PHI | 12 hr |
| Mar 23, 4:23 AM EDT | Red Flag Warning | PHI | 19 hr |
| Mar 29, 7:53 PM EDT | Severe Thunderstorm Warning | PHI | 67 min |
| Mar 29, 8:19 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| Apr 3, 3:08 PM EDT | Wind Advisory | PHI | 29 hr |
| Apr 6, 6:59 AM EDT | Severe Thunderstorm Warning | PHI | 61 min |
| Apr 6, 7:37 AM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Apr 6, 10:27 AM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Apr 6, 11:22 AM EDT | Mesoscale Discussion | SPC | 53 min |
| Apr 15, 2:27 PM EDT | Coastal Flood Advisory | PHI | 13 hr |
| Apr 16, 3:01 PM EDT | Frost Advisory | PHI | 17 hr |
| Apr 23, 4:00 AM EDT | Frost Advisory | PHI | 28 hr |
| Apr 28, 10:34 AM EDT | Red Flag Warning | PHI | 9 hr |
| May 7, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | 40 min |
| May 16, 3:41 AM EDT | Dense Fog Advisory | PHI | 5 hr |
| May 18, 4:27 AM EDT | Frost Advisory | PHI | 28 hr |
| May 26, 3:40 PM EDT | Coastal Flood Advisory | PHI | 10 hr |
| May 28, 4:15 AM EDT | Dense Fog Advisory | PHI | 7 hr |
| May 29, 12:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 29, 1:26 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 29, 4:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 29, 6:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 2, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 2, 4:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 2, 4:22 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Jun 2, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Jun 3, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 3, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jun 3, 7:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 4, 3:04 PM EDT | Coastal Flood Statement | PHI | 31 hr |
| Jun 9, 4:17 AM EDT | Dense Fog Advisory | PHI | 5 hr |
| Jun 9, 6:01 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 9, 8:30 AM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| Jun 9, 8:42 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 9, 8:43 AM EDT | Severe Thunderstorm Warning | PHI | 62 min |
| Jun 9, 8:47 AM EDT | Severe Thunderstorm Warning | PHI | 70 min |
| Jun 9, 9:09 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 11, 4:10 PM EDT | Coastal Flood Statement | PHI | 12 hr |
| Jun 11, 10:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 17, 5:20 AM EDT | Coastal Flood Statement | PHI | 14 hr |
| Jun 20, 6:55 PM EDT | Coastal Flood Advisory | PHI | 5 hr |
| Jun 21, 4:40 AM EDT | Coastal Flood Watch | PHI | 11 hr |
| Jun 21, 3:28 PM EDT | Coastal Flood Warning | PHI | 33 hr |
| Jun 23, 5:04 AM EDT | Coastal Flood Advisory | PHI | 24 hr |
| Jun 24, 6:00 AM EDT | Coastal Flood Advisory | PHI | 24 hr |
| Jun 26, 2:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 26, 2:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 7:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 26, 7:45 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jun 26, 9:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 1, 12:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 16, 4:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 17, 6:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 20, 11:46 AM EDT | Coastal Flood Advisory | PHI | 12 hr |
| Jul 21, 6:03 AM EDT | Coastal Flood Advisory | PHI | 19 hr |
| Jul 21, 8:24 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 22, 5:37 AM EDT | Coastal Flood Advisory | PHI | 20 hr |
| Jul 23, 4:11 AM EDT | Coastal Flood Advisory | PHI | 23 hr |
| Jul 26, 1:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 26, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 29, 12:49 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 29, 5:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 29, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | 38 min |
| Jul 29, 6:42 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 29, 6:42 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| Jul 31, 12:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 31, 1:18 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 3:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 4:31 PM EDT | Severe Thunderstorm Warning | PHI | 59 min |
| Jul 31, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 31, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | 96 min |
| Jul 31, 5:07 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Jul 31, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| Jul 31, 5:48 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 2, 11:30 AM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| Aug 2, 12:13 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 9, 10:33 AM EDT | Areal Flood Advisory | PHI | 69 min |
| Aug 9, 11:57 AM EDT | Flash Flood Watch | PHI | 11 hr |
| Aug 9, 1:56 PM EDT | Heat Advisory | PHI | 30 hr |
| Aug 9, 3:18 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 9, 6:48 PM EDT | Severe Thunderstorm Warning | PHI | 72 min |
| Aug 9, 7:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 7:21 PM EDT | Severe Thunderstorm Warning | PHI | 69 min |
| Aug 12, 1:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 12, 3:01 PM EDT | Severe Thunderstorm Warning | PHI | 59 min |
| Aug 12, 3:17 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 12, 3:32 PM EDT | Areal Flood Advisory | PHI | 118 min |
| Aug 12, 4:01 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 13, 3:36 AM EDT | Flood Watch | PHI | 36 min |
| Aug 13, 4:12 AM EDT | Flash Flood Watch | PHI | 15 hr |
| Aug 18, 8:21 PM EDT | Severe Thunderstorm Warning | PHI | 69 min |
| Aug 19, 6:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 20, 3:30 PM EDT | Coastal Flood Advisory | PHI | 7 hr |
| Aug 21, 6:11 AM EDT | Coastal Flood Statement | PHI | 9 hr |
| Aug 21, 12:36 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 21, 2:47 PM EDT | Flash Flood Watch | PHI | 35 hr |
| Aug 21, 3:12 PM EDT | High Surf Advisory | PHI | 53 hr |
| Aug 21, 5:55 PM EDT | Mesoscale Discussion | SPC | 80 min |
| Aug 22, 4:26 AM EDT | Areal Flood Advisory | PHI | 6 hr |
| Aug 22, 9:01 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 23, 3:30 AM EDT | Coastal Flood Advisory | PHI | 10 hr |
| Aug 28, 7:55 AM EDT | Severe Thunderstorm Warning | PHI | 70 min |
| Aug 28, 12:04 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 28, 12:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 29, 5:42 AM EDT | Coastal Flood Statement | PHI | 14 hr |
| Sep 5, 4:46 AM EDT | Coastal Flood Statement | PHI | 15 hr |
| Sep 6, 4:50 AM EDT | Coastal Flood Statement | PHI | 15 hr |
| Sep 7, 4:45 AM EDT | Coastal Flood Statement | PHI | 15 hr |
| Sep 8, 3:00 PM EDT | Coastal Flood Advisory | PHI | 24 hr |
| Sep 9, 4:02 AM EDT | Coastal Flood Watch | PHI | 10 hr |
| Sep 9, 4:02 AM EDT | Coastal Flood Statement | PHI | 16 hr |
| Sep 9, 2:30 PM EDT | Coastal Flood Advisory | PHI | 25 hr |
| Sep 10, 3:30 AM EDT | Wind Advisory | PHI | 18 hr |
| Sep 10, 3:02 PM EDT | Coastal Flood Statement | PHI | 20 hr |
| Sep 11, 2:46 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 3:07 AM EDT | Coastal Flood Advisory | PHI | 12 hr |
| Sep 11, 4:12 AM EDT | Tornado Watch | SPC | 8 hr |
| Sep 11, 5:36 AM EDT | Severe Thunderstorm Warning | PHI | 69 min |
| Sep 11, 5:52 AM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Sep 11, 6:12 AM EDT | Areal Flood Advisory | PHI | 2 hr |
| Sep 11, 6:49 AM EDT | Severe Thunderstorm Warning | PHI | 86 min |
| Sep 11, 7:39 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 8:18 AM EDT | Areal Flood Advisory | PHI | 117 min |
| Sep 11, 8:31 AM EDT | Areal Flood Advisory | PHI | 119 min |
| Sep 11, 8:58 AM EDT | Coastal Flood Statement | PHI | 35 hr |
| Sep 15, 2:52 PM EDT | Coastal Flood Advisory | PHI | 59 hr |
| Sep 27, 7:50 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Oct 3, 5:04 AM EDT | Areal Flood Advisory | PHI | 116 min |
| Oct 4, 2:24 AM EDT | Dense Fog Advisory | PHI | 7 hr |
| Oct 6, 3:19 PM EDT | Wind Advisory | PHI | 29 hr |
| Oct 14, 3:58 AM EDT | Coastal Flood Watch | PHI | 65 hr |
| Oct 14, 4:15 AM EDT | High Wind Watch | PHI | 23 hr |
| Oct 14, 2:51 PM EDT | Wind Advisory | PHI | 37 hr |
| Oct 15, 3:39 AM EDT | High Wind Warning | PHI | 12 hr |
| Oct 15, 10:06 AM EDT | Coastal Flood Advisory | PHI | 13 hr |
| Oct 15, 3:26 PM EDT | Coastal Flood Warning | PHI | 20 hr |
| Oct 16, 4:09 PM EDT | Coastal Flood Warning | PHI | 44 hr |
| Oct 16, 9:23 PM EDT | Coastal Flood Watch | PHI | 5 hr |
| Oct 18, 9:18 AM EDT | Coastal Flood Advisory | PHI | 30 hr |
| Oct 19, 1:12 PM EDT | Frost Advisory | PHI | 18 hr |
| Oct 24, 7:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Oct 30, 3:05 AM EDT | Coastal Flood Statement | PHI | 10 hr |
| Nov 1, 1:35 PM EST | Coastal Flood Advisory | PHI | 22 hr |
| Nov 2, 2:55 PM EST | Freeze Watch | PHI | 11 hr |
| Nov 2, 11:33 PM EST | Coastal Flood Advisory | PHI | 15 hr |
| Nov 3, 2:09 AM EST | Frost Advisory | PHI | 30 hr |
| Nov 3, 2:09 AM EST | Freeze Warning | PHI | 30 hr |
| Nov 10, 3:26 PM EST | Coastal Flood Watch | PHI | 36 hr |
| Nov 11, 4:20 AM EST | High Surf Advisory | PHI | 3 days |
| Nov 11, 9:43 AM EST | High Wind Warning | PHI | 42 hr |
| Nov 11, 9:43 AM EST | Wind Advisory | PHI | 53 hr |
| Nov 11, 3:09 PM EST | Coastal Flood Warning | PHI | 67 hr |
| Nov 12, 3:00 AM EST | Coastal Flood Advisory | PHI | 3 days |
| Nov 23, 3:48 AM EST | Coastal Flood Advisory | PHI | 11 hr |
| Nov 23, 3:13 PM EST | Coastal Flood Advisory | PHI | 23 hr |
| Nov 27, 3:16 PM EST | Wind Advisory | PHI | 24 hr |
| Dec 2, 3:34 AM EST | Coastal Flood Advisory | PHI | 29 hr |
| Dec 2, 3:34 AM EST | High Surf Advisory | PHI | 23 hr |
| Dec 2, 3:46 AM EST | Wind Advisory | PHI | 24 hr |
| Dec 3, 12:12 AM EST | Mesoscale Discussion | SPC | 93 min |
| Dec 4, 8:44 PM EST | Coastal Flood Advisory | PHI | 16 hr |
| Dec 8, 2:40 PM EST | Flash Flood Watch | PHI | 21 hr |
| Dec 9, 5:04 AM EST | Wind Advisory | PHI | 4 hr |
| Dec 9, 7:01 AM EST | Areal Flood Advisory | PHI | 4 hr |
| Dec 9, 12:00 PM EST | Wind Advisory | PHI | 33 hr |
| Dec 17, 3:30 PM EST | Winter Storm Watch | PHI | 22 hr |
| Dec 18, 2:29 AM EST | Coastal Flood Advisory | PHI | 36 hr |
| Dec 18, 4:40 AM EST | Winter Storm Warning | PHI | 46 hr |
| Dec 18, 4:10 PM EST | High Surf Advisory | PHI | 34 hr |
| Dec 19, 2:57 AM EST | Wind Advisory | PHI | 17 hr |
| Dec 19, 6:57 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 19, 2:55 PM EST | Coastal Flood Advisory | PHI | 11 hr |
| Dec 19, 7:25 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 20, 3:44 AM EST | Coastal Flood Advisory | PHI | 9 hr |
| Dec 26, 2:04 PM EST | Areal Flood Warning | PHI | 14 hr |
| Dec 27, 9:44 AM EST | Areal Flood Warning | PHI | 48 hr |
| Dec 28, 1:42 PM EST | Wind Advisory | PHI | 27 hr |
| Dec 29, 5:30 AM EST | Areal Flood Warning | PHI | 18 hr |
| Dec 31, 3:22 AM EST | Winter Weather Advisory | PHI | 8 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 | 27 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 34 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 4 |
| Flood Watch | 1 |
| Areal Flood Advisory | 18 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 3 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 1 |
| Wind Advisory | 14 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
| Coast and beach | |
| Coastal Flood Warning | 4 |
| Coastal Flood Watch | 5 |
| Coastal Flood Advisory | 28 |
| High Surf Advisory | 4 |
| Coastal Flood Statement | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.