Alert archive / New Jersey / Mercer County
Weather alerts in Mercer County, New Jersey, 2019
252 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mercer County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 252
- Warnings
- 64
- Watches
- 38
- Advisories
- 82
- Busiest month
- July55 alerts
- Busiest day
- August 7, 201920 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 2 tornado warnings covering Mercer County in 2019 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Mercer County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 37 | 29 | 22% | 35 | 83% | 25 min |
| Flash flood warnings | 13 | 9 | 31% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 32 | 4 | 88% | 17 | 35% | 5 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 410 | 276 | 33% | 1,175 | 87% | 25 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 86 | 51 | 41% | 211 | 94% | 96 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 |
|---|---|---|---|
| Dec 31, 9:53 PM EST | Areal Flood Advisory | PHI | 8 hr |
| Jan 7, 3:16 AM EST | Winter Weather Advisory | PHI | 27 hr |
| Jan 19, 11:37 AM EST | Coastal Flood Advisory | PHI | 27 hr |
| Jan 19, 2:47 PM EST | Flood Watch | PHI | 19 hr |
| Jan 20, 1:11 AM EST | Areal Flood Advisory | PHI | 8 hr |
| Jan 20, 1:13 AM EST | Special Weather Statement | PHI | 47 min |
| Jan 20, 3:38 AM EST | Wind Chill Advisory | PHI | 50 hr |
| Jan 20, 4:48 AM EST | Areal Flood Advisory | PHI | 4 hr |
| Jan 20, 9:49 AM EST | Wind Advisory | PHI | 30 hr |
| Jan 23, 3:58 AM EST | Flood Watch | PHI | 36 hr |
| Jan 24, 11:53 AM EST | Areal Flood Advisory | PHI | 4 hr |
| Jan 24, 1:13 PM EST | Special Weather Statement | PHI | 32 min |
| Jan 28, 3:16 PM EST | Winter Weather Advisory | PHI | 30 hr |
| Jan 29, 4:12 AM EST | Winter Weather Advisory | PHI | 17 hr |
| Jan 29, 9:08 PM EST | Wind Chill Advisory | PHI | 37 hr |
| Jan 30, 3:32 AM EST | Wind Advisory | PHI | 17 hr |
| Jan 30, 11:10 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 30, 1:08 PM EST | Special Weather Statement | PHI | 82 min |
| Jan 30, 2:05 PM EST | Snow Squall Warning | PHI | 55 min |
| Jan 30, 2:12 PM EST | Special Weather Statement | PHI | 3 hr |
| Jan 30, 2:42 PM EST | Snow Squall Warning | PHI | 93 min |
| Feb 11, 4:37 AM EST | Winter Weather Advisory | PHI | 37 hr |
| Feb 13, 2:52 PM EST | Special Weather Statement | PHI | 38 min |
| Feb 18, 3:16 PM EST | Winter Storm Watch | PHI | 24 hr |
| Feb 19, 2:55 PM EST | Winter Weather Advisory | PHI | 37 hr |
| Feb 23, 4:02 AM EST | High Wind Watch | PHI | 23 hr |
| Feb 23, 2:58 PM EST | High Wind Warning | PHI | 48 hr |
| Feb 25, 2:58 PM EST | Wind Advisory | PHI | 3 hr |
| Mar 2, 3:35 AM EST | Winter Storm Watch | PHI | 24 hr |
| Mar 3, 4:01 AM EST | Winter Storm Warning | PHI | 24 hr |
| Mar 3, 5:41 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 3, 10:44 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 15, 7:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 20, 8:18 PM EDT | Coastal Flood Advisory | PHI | 34 hr |
| Mar 21, 3:22 AM EDT | Flood Watch | PHI | 24 hr |
| Mar 21, 11:50 PM EDT | Areal Flood Advisory | PHI | 5 hr |
| Mar 22, 12:12 AM EDT | Areal Flood Advisory | PHI | 5 hr |
| Apr 2, 3:02 PM EDT | Fire Weather Watch | PHI | 12 hr |
| Apr 3, 3:16 AM EDT | Red Flag Warning | PHI | 20 hr |
| Apr 14, 11:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 1:05 AM EDT | Tornado Watch | SPC | 5 hr |
| Apr 15, 3:19 AM EDT | Wind Advisory | PHI | 18 hr |
| Apr 15, 3:27 AM EDT | Severe Thunderstorm Warning | PHI | 32 min |
| Apr 15, 3:39 AM EDT | Severe Thunderstorm Warning | PHI | 37 min |
| Apr 15, 3:50 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 15, 3:59 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 18, 3:17 PM EDT | Flash Flood Watch | PHI | 42 hr |
| Apr 18, 4:15 PM EDT | Coastal Flood Advisory | PHI | 12 hr |
| Apr 19, 3:49 PM EDT | Coastal Flood Advisory | PHI | 12 hr |
| Apr 20, 5:26 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 20, 4:01 PM EDT | Coastal Flood Advisory | PHI | 13 hr |
| Apr 26, 1:33 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 26, 4:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Apr 26, 5:15 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 26, 5:44 PM EDT | Severe Thunderstorm Warning | PHI | 61 min |
| Apr 26, 5:57 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 2, 4:19 AM EDT | Dense Fog Advisory | PHI | 5 hr |
| May 4, 3:11 PM EDT | Flash Flood Watch | PHI | 21 hr |
| May 5, 5:50 AM EDT | Coastal Flood Advisory | PHI | 24 hr |
| May 7, 1:45 AM EDT | Coastal Flood Advisory | PHI | 4 hr |
| May 7, 8:51 PM EDT | Special Weather Statement | PHI | 24 min |
| May 13, 8:34 AM EDT | Coastal Flood Advisory | PHI | 3 hr |
| May 13, 2:28 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 13, 4:21 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| May 13, 6:18 PM EDT | Coastal Flood Advisory | PHI | 8 hr |
| May 14, 2:10 AM EDT | Coastal Flood Advisory | PHI | 11 hr |
| May 15, 10:02 PM EDT | Coastal Flood Advisory | PHI | 4 hr |
| May 16, 5:14 PM EDT | Coastal Flood Advisory | PHI | 10 hr |
| May 17, 4:51 PM EDT | Coastal Flood Advisory | PHI | 10 hr |
| May 19, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 19, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 19, 9:46 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| May 19, 10:27 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| May 19, 10:34 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| May 23, 3:36 PM EDT | Special Weather Statement | PHI | 24 min |
| May 28, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 28, 1:48 PM EDT | Tornado Watch | SPC | 8 hr |
| May 28, 4:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 8:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 29, 3:18 AM EDT | Flash Flood Watch | PHI | 18 hr |
| May 29, 12:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 29, 1:10 PM EDT | Tornado Watch | SPC | 8 hr |
| May 29, 3:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 29, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| May 29, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| May 29, 4:53 PM EDT | Severe Thunderstorm Warning | PHI | 67 min |
| May 29, 5:27 PM EDT | Flash Flood Warning | PHI | 4 hr |
| May 29, 5:33 PM EDT | Tornado Warning | PHI | 27 min |
| May 29, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| May 29, 6:06 PM EDT | Flash Flood Warning | PHI | 4 hr |
| May 30, 3:20 AM EDT | Flash Flood Watch | PHI | 18 hr |
| May 30, 3:33 AM EDT | Dense Fog Advisory | PHI | 4 hr |
| May 30, 12:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 30, 3:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 30, 4:36 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| May 30, 4:57 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 30, 5:17 PM EDT | Flash Flood Warning | PHI | 4 hr |
| May 30, 5:23 PM EDT | Special Weather Statement | PHI | 37 min |
| May 30, 7:35 PM EDT | Special Weather Statement | PHI | 25 min |
| May 30, 7:56 PM EDT | Special Weather Statement | PHI | 34 min |
| Jun 2, 1:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 3:54 PM EDT | Special Weather Statement | PHI | 36 min |
| Jun 2, 7:56 PM EDT | Special Weather Statement | PHI | 34 min |
| Jun 2, 8:24 PM EDT | Special Weather Statement | PHI | 36 min |
| Jun 5, 11:19 PM EDT | Special Weather Statement | PHI | 26 min |
| Jun 5, 11:34 PM EDT | Areal Flood Advisory | PHI | 116 min |
| Jun 5, 11:41 PM EDT | Special Weather Statement | PHI | 34 min |
| Jun 13, 7:25 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 13, 11:57 PM EDT | Coastal Flood Advisory | PHI | 2 hr |
| Jun 17, 3:51 AM EDT | Flash Flood Watch | PHI | 47 hr |
| Jun 18, 12:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 18, 12:38 PM EDT | Areal Flood Advisory | PHI | 7 hr |
| Jun 18, 1:51 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jun 18, 2:11 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jun 18, 2:11 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 3:26 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jun 18, 4:25 PM EDT | Special Weather Statement | PHI | 35 min |
| Jun 18, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 18, 5:00 PM EDT | Areal Flood Advisory | PHI | 67 min |
| Jun 18, 7:24 PM EDT | Areal Flood Warning | PHI | 4 hr |
| Jun 19, 3:17 AM EDT | Flash Flood Watch | PHI | 43 hr |
| Jun 19, 4:52 PM EDT | Areal Flood Advisory | PHI | 94 min |
| Jun 20, 1:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 2:48 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jun 20, 3:20 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jun 20, 3:36 PM EDT | Special Weather Statement | PHI | 54 min |
| Jun 20, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Jun 20, 4:24 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 29, 11:34 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 29, 12:08 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 29, 1:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 29, 4:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 2, 5:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 7:03 PM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Jul 2, 7:46 PM EDT | Severe Thunderstorm Warning | PHI | 18 min |
| Jul 5, 3:27 AM EDT | Heat Advisory | PHI | 11 hr |
| Jul 5, 2:48 PM EDT | Excessive Heat Warning | PHI | 28 hr |
| Jul 6, 1:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 4:54 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 6, 5:25 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Jul 6, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | 15 min |
| Jul 11, 3:44 AM EDT | Flash Flood Watch | PHI | 18 hr |
| Jul 11, 5:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 6:15 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 11, 6:17 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 11, 6:58 PM EDT | Severe Thunderstorm Warning | PHI | 62 min |
| Jul 11, 7:27 PM EDT | Areal Flood Advisory | PHI | 7 hr |
| Jul 11, 7:44 PM EDT | Severe Thunderstorm Warning | PHI | 61 min |
| Jul 16, 3:30 AM EDT | Excessive Heat Watch | PHI | 11 hr |
| Jul 16, 2:44 PM EDT | Excessive Heat Warning | PHI | 5 days |
| Jul 17, 3:54 AM EDT | Flash Flood Watch | PHI | 19 hr |
| Jul 17, 1:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 3:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 17, 8:15 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| Jul 17, 8:40 PM EDT | Special Weather Statement | PHI | 65 min |
| Jul 17, 8:55 PM EDT | Areal Flood Advisory | PHI | 49 min |
| Jul 17, 9:02 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Jul 18, 1:49 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 3:48 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 18, 4:53 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 18, 5:13 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Jul 21, 3:15 AM EDT | Flash Flood Watch | PHI | 51 hr |
| Jul 21, 3:09 PM EDT | Heat Advisory | PHI | 27 hr |
| Jul 22, 12:16 AM EDT | Special Weather Statement | PHI | 29 min |
| Jul 22, 1:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 22, 2:17 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 22, 4:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 22, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | 80 min |
| Jul 22, 5:43 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 22, 5:50 PM EDT | Severe Thunderstorm Warning | PHI | 40 min |
| Jul 22, 8:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 22, 10:36 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 22, 11:04 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 23, 10:34 PM EDT | Areal Flood Advisory | PHI | 55 min |
| Jul 31, 3:28 AM EDT | Flash Flood Watch | PHI | 17 hr |
| Jul 31, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 1:30 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| Jul 31, 1:46 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Jul 31, 2:11 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Jul 31, 2:29 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jul 31, 2:32 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 31, 2:46 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| Jul 31, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Jul 31, 3:49 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| Jul 31, 4:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Aug 1, 3:02 PM EDT | Coastal Flood Advisory | PHI | 12 hr |
| Aug 7, 10:02 AM EDT | Flash Flood Watch | PHI | 11 hr |
| Aug 7, 1:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 7, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Aug 7, 1:40 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Aug 7, 2:01 PM EDT | Areal Flood Advisory | PHI | 97 min |
| Aug 7, 2:07 PM EDT | Severe Thunderstorm Warning | PHI | 38 min |
| Aug 7, 2:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 7, 3:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 7, 4:03 PM EDT | Special Weather Statement | PHI | 42 min |
| Aug 7, 4:06 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 7, 4:09 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| Aug 7, 4:20 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 7, 4:34 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| Aug 7, 4:39 PM EDT | Flash Flood Warning | PHI | 6 hr |
| Aug 7, 5:02 PM EDT | Severe Thunderstorm Warning | PHI | 22 min |
| Aug 7, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | 59 min |
| Aug 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | 78 min |
| Aug 7, 6:01 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 7, 6:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 7, 7:42 PM EDT | Areal Flood Warning | PHI | 3 hr |
| Aug 8, 3:56 PM EDT | Areal Flood Advisory | PHI | 104 min |
| Aug 12, 3:34 PM EDT | Flash Flood Watch | PHI | 23 hr |
| Aug 15, 2:23 AM EDT | Dense Fog Advisory | PHI | 6 hr |
| Aug 17, 3:31 PM EDT | Excessive Heat Watch | PHI | 12 hr |
| Aug 18, 3:32 AM EDT | Heat Advisory | PHI | 4 days |
| Aug 19, 4:30 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| Aug 21, 11:31 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 21, 3:27 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 21, 10:28 PM EDT | Special Weather Statement | PHI | 32 min |
| Aug 22, 8:27 PM EDT | Special Weather Statement | PHI | 48 min |
| Sep 2, 1:31 PM EDT | Special Weather Statement | PHI | 29 min |
| Sep 2, 2:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 2, 4:56 PM EDT | Areal Flood Advisory | PHI | 78 min |
| Sep 4, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 12, 2:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 28, 5:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 2, 7:06 PM EDT | Special Weather Statement | PHI | 39 min |
| Oct 10, 3:36 PM EDT | Coastal Flood Advisory | PHI | 65 hr |
| Oct 15, 3:27 PM EDT | Wind Advisory | PHI | 51 hr |
| Oct 16, 6:29 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Oct 18, 3:16 AM EDT | Frost Advisory | PHI | 30 hr |
| Oct 26, 5:32 AM EDT | Coastal Flood Advisory | PHI | 35 hr |
| Oct 27, 12:07 PM EDT | Special Weather Statement | PHI | 53 min |
| Oct 28, 3:48 PM EDT | Coastal Flood Advisory | PHI | 25 hr |
| Oct 31, 3:08 PM EDT | Coastal Flood Advisory | PHI | 11 hr |
| Oct 31, 3:16 PM EDT | Wind Advisory | PHI | 18 hr |
| Oct 31, 7:56 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Oct 31, 9:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 31, 11:24 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| Oct 31, 11:54 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| Oct 31, 11:54 PM EDT | Tornado Warning | PHI | 36 min |
| Nov 1, 9:12 AM EDT | Freeze Warning | PHI | 25 hr |
| Nov 27, 3:37 AM EST | Wind Advisory | PHI | 38 hr |
| Nov 30, 3:43 AM EST | Winter Weather Advisory | PHI | 3 days |
| Nov 30, 3:41 PM EST | Winter Storm Warning | PHI | 60 hr |
| Dec 2, 10:43 AM EST | Special Weather Statement | PHI | 47 min |
| Dec 13, 3:40 PM EST | Flood Watch | PHI | 17 hr |
| Dec 15, 3:24 PM EST | Winter Weather Advisory | PHI | 51 hr |
| Dec 17, 12:51 AM EST | Areal Flood Advisory | PHI | 6 hr |
| Dec 17, 4:44 AM EST | Areal Flood Advisory | PHI | 2 hr |
| Dec 18, 4:09 PM EST | Snow Squall Warning | PHI | 36 min |
| Dec 18, 4:44 PM EST | Special Weather Statement | PHI | 61 min |
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 | 37 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 41 |
| Special Weather Statement | 27 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 13 |
| Flash Flood Watch | 12 |
| Flood Watch | 4 |
| Areal Flood Advisory | 40 |
| Winter | |
| Snow Squall Warning | 3 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Coastal Flood Advisory | 19 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.