Alert archive / Pennsylvania / Delaware County
Weather alerts in Delaware County, Pennsylvania, 2020
229 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Delaware County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 229
- Warnings
- 92
- Watches
- 31
- Advisories
- 61
- Busiest month
- August51 alerts
- Busiest day
- July 6, 202015 alerts
Over time
By month
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, 8:33 AM EST | Dense Fog Advisory | PHI | 4 hr |
| Jan 7, 6:19 AM EST | Winter Weather Advisory | PHI | 14 hr |
| Jan 7, 2:27 PM EST | Wind Advisory | PHI | 28 hr |
| Jan 8, 8:28 AM EST | Snow Squall Warning | PHI | 47 min |
| Jan 8, 8:28 AM EST | Snow Squall Warning | PHI | 47 min |
| Jan 8, 12:49 PM EST | Snow Squall Warning | PHI | 26 min |
| Jan 11, 1:12 PM EST | Wind Advisory | PHI | 24 hr |
| Jan 12, 5:54 AM EST | Special Weather Statement | PHI | 51 min |
| Jan 15, 1:18 PM EST | Wind Advisory | PHI | 30 hr |
| Jan 17, 3:37 AM EST | Winter Weather Advisory | PHI | 41 hr |
| Jan 25, 10:32 AM EST | Areal Flood Warning | PHI | 4 hr |
| Jan 25, 11:52 AM EST | Areal Flood Advisory | PHI | 3 hr |
| Jan 25, 11:52 AM EST | River Flood Warning | PHI | 4 hr |
| Jan 25, 12:02 PM EST | Areal Flood Warning | PHI | 3 hr |
| Jan 25, 2:59 PM EST | Areal Flood Warning | PHI | 3 hr |
| Jan 25, 3:00 PM EST | Areal Flood Warning | PHI | 2 hr |
| Jan 25, 8:00 PM EST | River Flood Warning | PHI | 6 hr |
| Feb 1, 2:02 AM EST | Dense Fog Advisory | PHI | 9 hr |
| Feb 5, 2:56 PM EST | Flood Watch | PHI | 29 hr |
| Feb 6, 2:55 PM EST | Wind Advisory | PHI | 27 hr |
| Feb 7, 8:03 AM EST | Coastal Flood Advisory | PHI | 11 hr |
| Feb 7, 8:52 AM EST | Severe Thunderstorm Warning | PHI | 53 min |
| Feb 7, 9:36 AM EST | Severe Thunderstorm Warning | PHI | 39 min |
| Feb 7, 9:39 AM EST | Tornado Warning | PHI | 36 min |
| Feb 7, 9:50 AM EST | Mesoscale Discussion | SPC | 85 min |
| Feb 27, 9:10 AM EST | Wind Advisory | PHI | 9 hr |
| Mar 3, 6:50 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 8:09 PM EST | Special Weather Statement | PHI | 51 min |
| Mar 3, 8:39 PM EST | Severe Thunderstorm Warning | PHI | 51 min |
| Mar 3, 9:09 PM EST | Severe Thunderstorm Warning | PHI | 51 min |
| Mar 3, 10:52 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 20, 2:32 AM EDT | Dense Fog Advisory | PHI | 6 hr |
| Mar 30, 2:42 PM EDT | Special Weather Statement | PHI | 33 min |
| Mar 30, 4:31 PM EDT | Special Weather Statement | PHI | 44 min |
| Apr 3, 2:36 PM EDT | Coastal Flood Advisory | PHI | 23 hr |
| Apr 7, 9:30 PM EDT | Coastal Flood Advisory | PHI | 33 hr |
| Apr 8, 1:55 AM EDT | Special Weather Statement | PHI | 50 min |
| Apr 8, 2:30 AM EDT | Severe Thunderstorm Warning | PHI | 30 min |
| Apr 8, 7:19 PM EDT | Wind Advisory | PHI | 24 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 9, 1:00 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| Apr 9, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Apr 9, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Apr 9, 1:33 PM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Apr 9, 3:32 PM EDT | Wind Advisory | PHI | 27 hr |
| Apr 9, 11:49 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| Apr 11, 3:32 PM EDT | High Wind Watch | PHI | 21 hr |
| Apr 12, 12:25 PM EDT | High Wind Warning | PHI | 29 hr |
| Apr 12, 3:18 PM EDT | Coastal Flood Advisory | PHI | 30 hr |
| Apr 13, 6:11 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 13, 6:48 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 13, 10:34 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 13, 11:09 AM EDT | Areal Flood Warning | PHI | 3 hr |
| Apr 13, 11:33 AM EDT | Tornado Watch | SPC | 5 hr |
| Apr 13, 12:29 PM EDT | River Flood Warning | PHI | 12 hr |
| Apr 13, 1:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 13, 2:37 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Apr 13, 2:41 PM EDT | Severe Thunderstorm Warning | PHI | 64 min |
| Apr 16, 3:19 PM EDT | Frost Advisory | PHI | 18 hr |
| Apr 21, 3:34 AM EDT | Freeze Warning | PHI | 28 hr |
| Apr 21, 12:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 21, 1:04 PM EDT | Severe Thunderstorm Warning | PHI | 26 min |
| Apr 21, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 21, 1:38 PM EDT | Special Weather Statement | PHI | 52 min |
| Apr 21, 1:49 PM EDT | Severe Thunderstorm Warning | PHI | 56 min |
| Apr 25, 3:20 AM EDT | Dense Fog Advisory | PHI | 3 hr |
| Apr 29, 3:14 AM EDT | Flood Watch | PHI | 48 hr |
| Apr 29, 3:15 PM EDT | Wind Advisory | PHI | 29 hr |
| Apr 30, 4:00 AM EDT | High Wind Warning | PHI | 16 hr |
| Apr 30, 10:20 AM EDT | Coastal Flood Advisory | PHI | 13 hr |
| May 5, 3:33 PM EDT | Coastal Flood Advisory | PHI | 36 hr |
| May 25, 9:01 PM EDT | Dense Fog Advisory | PHI | 12 hr |
| May 26, 3:21 PM EDT | Dense Fog Advisory | PHI | 17 hr |
| May 29, 12:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 29, 8:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 3, 10:08 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 3, 11:34 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 3, 11:59 AM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jun 3, 12:06 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| Jun 3, 3:52 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 3, 7:02 PM EDT | Severe Thunderstorm Warning | PHI | 58 min |
| Jun 3, 7:21 PM EDT | Tornado Warning | PHI | 24 min |
| Jun 3, 7:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 4, 6:06 AM EDT | Coastal Flood Advisory | PHI | 22 hr |
| Jun 4, 10:05 PM EDT | Special Weather Statement | PHI | 40 min |
| Jun 4, 10:31 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jun 5, 9:47 AM EDT | Flash Flood Watch | PHI | 12 hr |
| Jun 5, 3:48 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 5, 5:19 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jun 10, 3:16 AM EDT | Heat Advisory | PHI | 15 hr |
| Jun 23, 6:12 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Jun 23, 7:09 PM EDT | Special Weather Statement | PHI | 36 min |
| Jun 27, 3:16 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 28, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | 36 min |
| Jul 6, 3:16 AM EDT | Heat Advisory | PHI | 12 hr |
| Jul 6, 12:33 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 6, 12:52 PM EDT | Flash Flood Watch | PHI | 8 hr |
| Jul 6, 12:57 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jul 6, 1:08 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 6, 1:38 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 6, 2:51 PM EDT | Severe Thunderstorm Warning | PHI | 24 min |
| Jul 6, 2:57 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 6, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Jul 6, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | 38 min |
| Jul 6, 4:07 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 6, 4:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 6, 5:20 PM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Jul 6, 5:43 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 6, 6:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 8:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 3:00 PM EDT | Flash Flood Watch | PHI | 30 hr |
| Jul 10, 11:02 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 10, 11:08 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 10, 12:56 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 10, 4:05 PM EDT | River Flood Warning | PHI | 4 hr |
| Jul 10, 4:48 PM EDT | Areal Flood Warning | PHI | 4 hr |
| Jul 11, 2:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 12, 10:25 PM EDT | Special Weather Statement | PHI | 50 min |
| Jul 16, 3:43 PM EDT | Excessive Heat Watch | PHI | 36 hr |
| Jul 18, 3:55 AM EDT | Excessive Heat Warning | PHI | 64 hr |
| Jul 20, 7:57 PM EDT | Heat Advisory | PHI | 48 hr |
| Jul 22, 10:48 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 22, 2:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 22, 4:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 22, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| Jul 22, 5:33 PM EDT | Severe Thunderstorm Warning | PHI | 57 min |
| Jul 22, 7:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 23, 11:10 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jul 23, 11:16 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| Jul 23, 11:44 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jul 27, 3:06 PM EDT | Heat Advisory | PHI | 29 hr |
| Jul 30, 10:11 PM EDT | Special Weather Statement | PHI | 49 min |
| Jul 30, 10:35 PM EDT | Special Weather Statement | PHI | 40 min |
| Jul 30, 10:55 PM EDT | Special Weather Statement | PHI | 50 min |
| Jul 30, 11:06 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| Aug 1, 3:20 PM EDT | Heat Advisory | PHI | 29 hr |
| Aug 2, 3:33 PM EDT | Flash Flood Watch | PHI | 48 hr |
| Aug 2, 5:04 PM EDT | Tropical Storm Watch | PHI | 18 hr |
| Aug 3, 5:08 AM EDT | Tropical Storm Warning | PHI | 39 hr |
| Aug 3, 4:26 PM EDT | Coastal Flood Advisory | PHI | 38 hr |
| Aug 4, 5:17 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 4, 6:45 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 4, 7:23 AM EDT | Tornado Warning | PHI | 20 min |
| Aug 4, 7:23 AM EDT | Tornado Watch | SPC | 9 hr |
| Aug 4, 7:28 AM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 4, 8:19 AM EDT | River Flood Warning | PHI | 15 hr |
| Aug 4, 10:02 AM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 4, 10:20 AM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 4, 12:48 PM EDT | River Flood Warning | PHI | 24 hr |
| Aug 4, 1:59 PM EDT | Areal Flood Warning | PHI | 9 hr |
| Aug 4, 2:09 PM EDT | Areal Flood Warning | PHI | 15 hr |
| Aug 6, 3:37 AM EDT | Flash Flood Watch | PHI | 44 hr |
| Aug 7, 1:30 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 7, 5:03 PM EDT | Flash Flood Warning | PHI | 5 hr |
| Aug 7, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| Aug 7, 5:49 PM EDT | Tornado Warning | PHI | 26 min |
| Aug 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Aug 7, 6:00 PM EDT | Tornado Warning | PHI | 30 min |
| Aug 7, 7:10 PM EDT | River Flood Warning | PHI | 7 hr |
| Aug 7, 9:48 PM EDT | Areal Flood Warning | PHI | 105 min |
| Aug 11, 3:48 PM EDT | Flash Flood Watch | PHI | 28 hr |
| Aug 12, 12:43 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 12, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Aug 12, 1:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 1:47 PM EDT | Flash Flood Warning | PHI | 2 hr |
| Aug 12, 1:54 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Aug 12, 2:40 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 12, 2:44 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Aug 12, 3:20 PM EDT | Severe Thunderstorm Warning | PHI | 29 min |
| Aug 13, 3:02 AM EDT | Flash Flood Watch | PHI | 17 hr |
| Aug 13, 3:56 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Aug 16, 5:14 AM EDT | Coastal Flood Advisory | PHI | 22 hr |
| Aug 17, 5:08 AM EDT | Coastal Flood Advisory | PHI | 23 hr |
| Aug 17, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | 16 min |
| Aug 23, 12:59 PM EDT | Special Weather Statement | PHI | 61 min |
| Aug 23, 2:07 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 23, 8:42 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Aug 25, 3:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 25, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 27, 6:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 28, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 28, 3:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 28, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Aug 28, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Aug 28, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| Aug 28, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| Sep 2, 6:43 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 2, 8:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Sep 3, 3:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 3, 3:42 PM EDT | Tornado Watch | SPC | 6 hr |
| Sep 3, 7:17 PM EDT | Special Weather Statement | PHI | 43 min |
| Sep 9, 5:08 PM EDT | Flash Flood Watch | PHI | 29 hr |
| Sep 25, 8:01 AM EDT | Dense Fog Advisory | PHI | 119 min |
| Sep 29, 3:26 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 30, 1:46 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Oct 20, 10:49 PM EDT | Dense Fog Advisory | PHI | 11 hr |
| Oct 22, 12:25 AM EDT | Dense Fog Advisory | PHI | 9 hr |
| Oct 23, 2:54 AM EDT | Dense Fog Advisory | PHI | 6 hr |
| Oct 28, 3:10 PM EDT | Flood Watch | PHI | 27 hr |
| Oct 29, 3:21 PM EDT | Freeze Warning | PHI | 42 hr |
| Nov 1, 3:10 AM EST | Wind Advisory | PHI | 36 hr |
| Nov 11, 6:34 PM EST | Areal Flood Advisory | PHI | 3 hr |
| Nov 15, 3:33 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 15, 5:35 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Nov 15, 6:52 PM EST | Mesoscale Discussion | SPC | 113 min |
| Nov 15, 6:53 PM EST | Severe Thunderstorm Warning | PHI | 67 min |
| Nov 15, 7:50 PM EST | Severe Thunderstorm Warning | PHI | 70 min |
| Nov 30, 12:15 PM EST | Areal Flood Advisory | PHI | 3 hr |
| Nov 30, 12:26 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Nov 30, 1:07 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 30, 2:18 PM EST | Coastal Flood Advisory | PHI | 2 hr |
| Nov 30, 2:41 PM EST | Severe Thunderstorm Warning | PHI | 49 min |
| Nov 30, 2:48 PM EST | Areal Flood Warning | PHI | 8 hr |
| Nov 30, 3:01 PM EST | Severe Thunderstorm Warning | PHI | 44 min |
| Nov 30, 3:02 PM EST | Mesoscale Discussion | SPC | 88 min |
| Nov 30, 4:17 PM EST | Areal Flood Warning | PHI | 10 hr |
| Nov 30, 5:30 PM EST | River Flood Warning | PHI | 16 hr |
| Nov 30, 5:35 PM EST | River Flood Warning | PHI | 4 hr |
| Dec 1, 1:37 PM EST | Coastal Flood Advisory | PHI | 2 hr |
| Dec 10, 3:53 PM EST | Freezing Fog Advisory | PHI | 12 hr |
| Dec 13, 7:15 PM EST | Winter Storm Watch | PHI | 44 hr |
| Dec 15, 3:18 AM EST | Winter Storm Warning | PHI | 51 hr |
| Dec 22, 3:22 PM EST | Flood Watch | PHI | 66 hr |
| Dec 23, 3:23 PM EST | Wind Advisory | PHI | 38 hr |
| Dec 24, 8:47 PM EST | Areal Flood Advisory | PHI | 6 hr |
| Dec 24, 9:38 PM EST | Areal Flood Warning | PHI | 14 hr |
| Dec 24, 10:30 PM EST | River Flood Warning | PHI | 10 hr |
| Dec 25, 3:33 AM EST | River Flood Warning | PHI | 17 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 | 44 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 31 |
| Special Weather Statement | 14 |
| Flooding | |
| Areal Flood Warning | 12 |
| Flash Flood Warning | 10 |
| River Flood Warning | 11 |
| Flash Flood Watch | 8 |
| Flood Watch | 4 |
| Areal Flood Advisory | 20 |
| Winter | |
| Snow Squall Warning | 3 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
| Freezing Fog Advisory | 1 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| Coastal Flood Advisory | 12 |
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. Rebuilt daily.