Alert archive / Pennsylvania / Philadelphia County
Weather alerts in Philadelphia County, Pennsylvania, 2012
245 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Philadelphia County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 245
- Warnings
- 51
- Watches
- 37
- Advisories
- 63
- Busiest month
- June40 alerts
- Busiest day
- September 18, 201210 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Philadelphia County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 18 | 15 | 17% | 3 | 100% | 17 min |
| Flash flood warnings | 4 | 2 | 50% | 1 | 100% | 36 min |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 8 | 1 | 88% | 3 | 33% | 1 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 238 | 159 | 33% | 410 | 90% | 28 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 57 | 25 | 56% | 49 | 73% | 55 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 11, 3:44 AM EST | Winter Weather Advisory | PHI | 31 days |
| Jan 12, 1:19 PM EST | Coastal Flood Warning | PHI | 73 min |
| Jan 12, 9:27 PM EST | Wind Advisory | PHI | 20 hr |
| Jan 15, 3:51 AM EST | Special Weather Statement | PHI | 54 min |
| Jan 15, 4:32 AM EST | Special Weather Statement | PHI | 43 min |
| Jan 20, 3:46 AM EST | Winter Weather Advisory | PHI | 41 days |
| Jan 21, 7:07 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 27, 8:27 AM EST | Special Weather Statement | PHI | 93 min |
| Jan 27, 2:15 PM EST | Wind Advisory | PHI | 6 hr |
| Feb 8, 12:12 PM EST | Winter Weather Advisory | PHI | 274 days |
| Feb 11, 3:37 PM EST | Wind Advisory | PHI | 12 hr |
| Feb 11, 6:16 PM EST | Special Weather Statement | PHI | 104 min |
| Feb 24, 3:40 AM EST | Wind Advisory | PHI | 42 hr |
| Feb 25, 10:35 AM EST | Special Weather Statement | PHI | 55 min |
| Feb 29, 7:45 PM EST | Special Weather Statement | PHI | 2 hr |
| Mar 3, 6:12 AM EST | Dense Fog Advisory | PHI | 3 hr |
| Mar 3, 4:15 PM EST | Wind Advisory | PHI | 2 hr |
| Mar 6, 2:37 PM EST | Fire Weather Watch | PHI | 13 hr |
| Mar 7, 3:31 AM EST | Red Flag Warning | PHI | 12 hr |
| Mar 9, 12:01 AM EST | Special Weather Statement | PHI | 59 min |
| Mar 9, 12:58 AM EST | Special Weather Statement | PHI | 62 min |
| Mar 20, 2:02 AM EDT | Dense Fog Advisory | PHI | 8 hr |
| Mar 21, 8:02 PM EDT | Dense Fog Advisory | PHI | 14 hr |
| Mar 25, 3:28 PM EDT | Freeze Watch | PHI | 12 hr |
| Mar 26, 3:46 AM EDT | Freeze Warning | PHI | 29 hr |
| Apr 4, 11:00 AM EDT | Red Flag Warning | PHI | 9 hr |
| Apr 5, 3:15 PM EDT | Fire Weather Watch | PHI | 11 hr |
| Apr 6, 2:40 AM EDT | Red Flag Warning | PHI | 17 hr |
| Apr 6, 3:10 PM EDT | Fire Weather Watch | PHI | 13 hr |
| Apr 6, 7:56 PM EDT | Red Flag Warning | PHI | 24 hr |
| Apr 7, 3:49 AM EDT | Fire Weather Watch | PHI | 18 hr |
| Apr 7, 8:14 PM EDT | Red Flag Warning | PHI | 24 hr |
| Apr 8, 4:07 AM EDT | Fire Weather Watch | PHI | 16 hr |
| Apr 8, 8:01 PM EDT | Red Flag Warning | PHI | 24 hr |
| Apr 9, 4:03 AM EDT | Wind Advisory | PHI | 14 hr |
| Apr 9, 3:12 PM EDT | Fire Weather Watch | PHI | 13 hr |
| Apr 9, 8:04 PM EDT | Red Flag Warning | PHI | 24 hr |
| Apr 16, 3:47 PM EDT | Fire Weather Watch | PHI | 12 hr |
| Apr 17, 3:28 AM EDT | Red Flag Warning | PHI | 17 hr |
| Apr 21, 3:15 PM EDT | Flood Watch | PHI | 36 hr |
| Apr 21, 8:41 PM EDT | Special Weather Statement | PHI | 109 min |
| Apr 21, 8:45 PM EDT | Severe Thunderstorm Warning | PHI | 30 min |
| Apr 21, 9:38 PM EDT | Severe Thunderstorm Warning | PHI | 67 min |
| Apr 22, 3:45 AM EDT | Wind Advisory | PHI | 20 hr |
| Apr 22, 4:14 AM EDT | Coastal Flood Advisory | PHI | 20 hr |
| Apr 22, 9:00 PM EDT | Areal Flood Advisory | PHI | 6 hr |
| May 4, 1:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 6, 3:47 AM EDT | Coastal Flood Advisory | PHI | 24 hr |
| May 7, 5:42 AM EDT | Coastal Flood Statement | PHI | 22 hr |
| May 15, 6:40 AM EDT | Special Weather Statement | PHI | 50 min |
| May 15, 7:30 AM EDT | Special Weather Statement | PHI | 2 hr |
| May 16, 12:20 AM EDT | Special Weather Statement | PHI | 55 min |
| May 16, 2:37 AM EDT | Areal Flood Warning | PHI | 3 hr |
| May 17, 9:55 PM EDT | Coastal Flood Statement | PHI | 108 min |
| May 24, 1:57 PM EDT | Special Weather Statement | PHI | 63 min |
| May 24, 2:01 PM EDT | Areal Flood Advisory | PHI | 83 min |
| May 26, 3:40 PM EDT | Excessive Heat Watch | PHI | 23 hr |
| May 27, 4:46 AM EDT | Special Weather Statement | PHI | 59 min |
| May 27, 4:58 AM EDT | Areal Flood Advisory | PHI | 83 min |
| May 27, 5:57 AM EDT | Flash Flood Warning | PHI | 2 hr |
| May 27, 10:07 AM EDT | Areal Flood Warning | PHI | 3 hr |
| May 27, 3:01 PM EDT | Excessive Heat Warning | PHI | 52 hr |
| May 29, 12:29 PM EDT | Flash Flood Watch | PHI | 8 hr |
| May 29, 2:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 29, 5:54 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 29, 6:46 PM EDT | Special Weather Statement | PHI | 89 min |
| May 29, 7:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 29, 7:34 PM EDT | Special Weather Statement | PHI | 56 min |
| May 29, 7:35 PM EDT | Areal Flood Advisory | PHI | 115 min |
| Jun 1, 6:20 AM EDT | Coastal Flood Advisory | PHI | 24 hr |
| Jun 1, 3:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 1, 4:15 PM EDT | Flash Flood Watch | PHI | 11 hr |
| Jun 1, 4:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jun 1, 8:01 PM EDT | Tornado Watch | SPC | 4 hr |
| Jun 1, 8:46 PM EDT | Areal Flood Advisory | PHI | 5 hr |
| Jun 2, 11:28 AM EDT | Coastal Flood Advisory | PHI | 15 hr |
| Jun 3, 3:57 AM EDT | Coastal Flood Advisory | PHI | 23 hr |
| Jun 3, 1:32 PM EDT | Special Weather Statement | PHI | 118 min |
| Jun 3, 1:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 2:47 PM EDT | Special Weather Statement | PHI | 118 min |
| Jun 3, 7:20 PM EDT | Special Weather Statement | PHI | 85 min |
| Jun 3, 8:10 PM EDT | Special Weather Statement | PHI | 95 min |
| Jun 4, 4:24 AM EDT | Coastal Flood Advisory | PHI | 23 hr |
| Jun 5, 3:44 AM EDT | Coastal Flood Advisory | PHI | 31 hr |
| Jun 6, 5:11 AM EDT | Coastal Flood Statement | PHI | 6 hr |
| Jun 6, 10:51 AM EDT | Coastal Flood Advisory | PHI | 23 hr |
| Jun 7, 4:51 AM EDT | Coastal Flood Statement | PHI | 23 hr |
| Jun 12, 10:17 PM EDT | Areal Flood Advisory | PHI | 106 min |
| Jun 15, 9:26 PM EDT | Coastal Flood Statement | PHI | 6 hr |
| Jun 18, 3:19 AM EDT | Excessive Heat Watch | PHI | 12 hr |
| Jun 18, 3:26 PM EDT | Excessive Heat Warning | PHI | 4 days |
| Jun 22, 12:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 1:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 4:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 22, 6:13 PM EDT | Special Weather Statement | PHI | 62 min |
| Jun 22, 6:16 PM EDT | Special Weather Statement | PHI | 119 min |
| Jun 22, 6:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 22, 7:02 PM EDT | Areal Flood Advisory | PHI | 102 min |
| Jun 22, 7:04 PM EDT | Severe Thunderstorm Warning | PHI | 56 min |
| Jun 25, 3:44 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 6:21 AM EDT | Mesoscale Discussion | SPC | 24 min |
| Jun 25, 6:39 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 3:42 PM EDT | Excessive Heat Watch | PHI | 36 hr |
| Jun 28, 3:59 AM EDT | Excessive Heat Warning | PHI | 4 days |
| Jun 29, 3:41 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 29, 3:51 AM EDT | Special Weather Statement | PHI | 54 min |
| Jun 29, 4:34 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 29, 5:00 AM EDT | Severe Thunderstorm Warning | PHI | 75 min |
| Jun 29, 11:51 PM EDT | Special Weather Statement | PHI | 54 min |
| Jul 1, 12:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 3, 3:47 AM EDT | Excessive Heat Watch | PHI | 12 hr |
| Jul 3, 3:28 PM EDT | Excessive Heat Warning | PHI | 5 days |
| Jul 4, 3:39 AM EDT | Excessive Heat Watch | PHI | 12 hr |
| Jul 7, 11:19 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 7, 5:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | 63 min |
| Jul 7, 6:14 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 14, 3:39 AM EDT | Excessive Heat Watch | PHI | 36 hr |
| Jul 15, 3:44 PM EDT | Excessive Heat Warning | PHI | 4 days |
| Jul 15, 8:27 PM EDT | Special Weather Statement | PHI | 63 min |
| Jul 15, 8:58 PM EDT | Special Weather Statement | PHI | 62 min |
| Jul 18, 10:25 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 12:41 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 18, 3:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 18, 5:51 PM EDT | Special Weather Statement | PHI | 54 min |
| Jul 20, 5:03 AM EDT | Areal Flood Advisory | PHI | 105 min |
| Jul 20, 5:43 AM EDT | Special Weather Statement | PHI | 92 min |
| Jul 20, 5:44 AM EDT | Areal Flood Advisory | PHI | 63 min |
| Jul 23, 1:24 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 23, 5:56 PM EDT | Special Weather Statement | PHI | 64 min |
| Jul 25, 3:09 PM EDT | Excessive Heat Warning | PHI | 51 hr |
| Jul 26, 3:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 26, 3:57 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 6:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 26, 6:46 PM EDT | Severe Thunderstorm Warning | PHI | 89 min |
| Jul 26, 7:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 28, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 1:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 1:46 PM EDT | Special Weather Statement | PHI | 59 min |
| Jul 28, 2:18 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 28, 4:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 28, 5:06 PM EDT | Special Weather Statement | PHI | 54 min |
| Jul 28, 8:26 PM EDT | Areal Flood Advisory | PHI | 101 min |
| Jul 28, 9:11 PM EDT | Special Weather Statement | PHI | 64 min |
| Jul 31, 9:51 PM EDT | Coastal Flood Statement | PHI | 5 hr |
| Aug 1, 3:31 PM EDT | Coastal Flood Statement | PHI | 11 hr |
| Aug 1, 3:35 PM EDT | Special Weather Statement | PHI | 55 min |
| Aug 1, 4:53 PM EDT | Special Weather Statement | PHI | 67 min |
| Aug 1, 5:06 PM EDT | Areal Flood Advisory | PHI | 12 min |
| Aug 1, 5:09 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 1, 5:46 PM EDT | Severe Thunderstorm Warning | PHI | 31 min |
| Aug 1, 6:16 PM EDT | Areal Flood Advisory | PHI | 46 min |
| Aug 2, 2:58 PM EDT | Heat Advisory | PHI | 28 hr |
| Aug 3, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | 63 min |
| Aug 3, 6:23 PM EDT | Severe Thunderstorm Warning | PHI | 43 min |
| Aug 4, 1:12 PM EDT | Special Weather Statement | PHI | 63 min |
| Aug 4, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | 34 min |
| Aug 5, 2:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 5, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 5, 5:22 PM EDT | Severe Thunderstorm Warning | PHI | 68 min |
| Aug 5, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | 74 min |
| Aug 5, 6:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 12:00 AM EDT | Special Weather Statement | PHI | 60 min |
| Aug 8, 6:27 AM EDT | Dense Fog Advisory | PHI | 4 hr |
| Aug 10, 8:21 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 8:41 AM EDT | Special Weather Statement | PHI | 94 min |
| Aug 10, 8:43 AM EDT | Special Weather Statement | PHI | 92 min |
| Aug 10, 9:08 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 10, 10:05 AM EDT | Special Weather Statement | PHI | 115 min |
| Aug 14, 9:22 AM EDT | Severe Thunderstorm Warning | PHI | 38 min |
| Aug 14, 9:56 AM EDT | Areal Flood Advisory | PHI | 108 min |
| Aug 14, 10:07 AM EDT | Special Weather Statement | PHI | 83 min |
| Aug 14, 4:15 PM EDT | Special Weather Statement | PHI | 60 min |
| Aug 27, 8:25 AM EDT | Special Weather Statement | PHI | 65 min |
| Aug 27, 10:00 AM EDT | Special Weather Statement | PHI | 30 min |
| Sep 3, 8:05 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 3, 10:28 AM EDT | Special Weather Statement | PHI | 62 min |
| Sep 3, 11:14 AM EDT | Areal Flood Advisory | PHI | 2 hr |
| Sep 3, 3:00 PM EDT | Flash Flood Watch | PHI | 49 hr |
| Sep 4, 3:41 AM EDT | Areal Flood Advisory | PHI | 2 hr |
| Sep 4, 4:00 AM EDT | Flash Flood Warning | PHI | 84 min |
| Sep 4, 12:08 PM EDT | Areal Flood Warning | PHI | 4 hr |
| Sep 4, 12:15 PM EDT | Areal Flood Warning | PHI | 106 min |
| Sep 4, 1:47 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Sep 4, 4:37 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 4, 5:22 PM EDT | Special Weather Statement | PHI | 53 min |
| Sep 4, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Sep 4, 7:01 PM EDT | Areal Flood Warning | PHI | 55 min |
| Sep 8, 12:15 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Sep 8, 2:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Sep 8, 4:07 PM EDT | Special Weather Statement | PHI | 83 min |
| Sep 8, 4:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 17, 2:54 PM EDT | Wind Advisory | PHI | 30 hr |
| Sep 18, 4:13 AM EDT | Coastal Flood Advisory | PHI | 21 hr |
| Sep 18, 11:14 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Sep 18, 11:19 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Sep 18, 12:10 PM EDT | Tornado Watch | SPC | 9 hr |
| Sep 18, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Sep 18, 4:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 18, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | 59 min |
| Sep 18, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | 78 min |
| Sep 18, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| Sep 18, 6:06 PM EDT | Areal Flood Advisory | PHI | 54 min |
| Sep 22, 3:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 22, 7:02 PM EDT | Special Weather Statement | PHI | 58 min |
| Sep 22, 7:39 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| Oct 3, 12:26 AM EDT | Dense Fog Advisory | PHI | 10 hr |
| Oct 15, 3:25 PM EDT | Special Weather Statement | PHI | 80 min |
| Oct 19, 4:15 AM EDT | Coastal Flood Statement | PHI | 14 hr |
| Oct 27, 4:51 AM EDT | Flood Watch | PHI | 71 hr |
| Oct 27, 5:05 AM EDT | High Wind Watch | PHI | 24 hr |
| Oct 27, 6:47 AM EDT | Coastal Flood Watch | PHI | 23 hr |
| Oct 27, 5:08 PM EDT | Coastal Flood Warning | PHI | 64 hr |
| Oct 28, 4:35 AM EDT | High Wind Warning | PHI | 52 hr |
| Oct 29, 7:40 AM EDT | Areal Flood Warning | PHI | 23 hr |
| Oct 29, 4:28 PM EDT | Special Weather Statement | PHI | 2 hr |
| Oct 30, 12:48 AM EDT | Areal Flood Advisory | PHI | 6 hr |
| Oct 30, 4:51 AM EDT | River Flood Warning | PHI | 5 hr |
| Oct 30, 6:03 AM EDT | Coastal Flood Advisory | PHI | 20 hr |
| Oct 30, 8:48 AM EDT | Wind Advisory | PHI | 3 hr |
| Nov 4, 4:02 AM EST | Freeze Watch | PHI | 11 hr |
| Nov 4, 2:56 PM EST | Freeze Warning | PHI | 13 hr |
| Nov 5, 3:20 PM EST | High Wind Watch | PHI | 24 hr |
| Nov 6, 2:52 PM EST | Coastal Flood Advisory | PHI | 43 hr |
| Nov 6, 3:41 PM EST | Wind Advisory | PHI | 27 hr |
| Nov 7, 3:40 AM EST | Winter Storm Warning | PHI | 12 hr |
| Nov 7, 12:55 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Nov 12, 2:42 AM EST | Dense Fog Advisory | PHI | 7 hr |
| Nov 13, 2:36 AM EST | Special Weather Statement | PHI | 84 min |
| Dec 1, 7:09 PM EST | Dense Fog Advisory | PHI | 14 hr |
| Dec 9, 7:23 PM EST | Dense Fog Advisory | PHI | 14 hr |
| Dec 16, 8:41 PM EST | Dense Fog Advisory | PHI | 16 hr |
| Dec 17, 3:27 PM EST | Dense Fog Advisory | PHI | 12 hr |
| Dec 18, 1:19 PM EST | Special Weather Statement | PHI | 56 min |
| Dec 18, 2:15 PM EST | Special Weather Statement | PHI | 60 min |
| Dec 20, 3:25 PM EST | Coastal Flood Advisory | PHI | 25 hr |
| Dec 20, 9:11 PM EST | Wind Advisory | PHI | 12 hr |
| Dec 21, 12:27 AM EST | Coastal Flood Warning | PHI | 11 hr |
| Dec 21, 7:49 AM EST | Areal Flood Warning | PHI | 11 hr |
| Dec 21, 3:16 PM EST | Wind Advisory | PHI | 27 hr |
| Dec 25, 3:03 PM EST | Flood Watch | PHI | 36 hr |
| Dec 26, 2:45 PM EST | Coastal Flood Advisory | PHI | 19 hr |
| Dec 26, 7:55 PM EST | Areal Flood Advisory | PHI | 6 hr |
| Dec 28, 3:49 AM EST | Winter Weather Advisory | PHI | 39 hr |
| Dec 30, 9:53 AM EST | Wind Advisory | PHI | 6 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 archive20112013
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.