Alert archive / Delaware / Sussex County
Weather alerts in Sussex County, Delaware, 2015
162 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sussex County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 162
- Warnings
- 25
- Watches
- 14
- Advisories
- 52
- Busiest month
- June34 alerts
- Busiest day
- August 5, 20159 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sussex County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 12 | 4 | 67% | 6 | 67% | 28 min |
| Flash flood warnings | 4 | 1 | 75% | 1 | 100% | 38 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 10 | 1 | 90% | 3 | 33% | 11 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 120 | 60 | 50% | 230 | 84% | 24 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 54 | 27 | 50% | 62 | 68% | 48 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, 3:31 PM EST | Wind Advisory | PHI | 9 hr |
| Jan 5, 3:26 PM EST | Winter Weather Advisory | PHI | 27 hr |
| Jan 6, 3:34 PM EST | Wind Chill Advisory | PHI | 45 hr |
| Jan 14, 3:14 AM EST | Winter Weather Advisory | PHI | 12 hr |
| Jan 18, 11:22 AM EST | Areal Flood Advisory | PHI | 6 hr |
| Jan 20, 3:36 PM EST | Winter Weather Advisory | PHI | 40 hr |
| Jan 25, 3:40 AM EST | Winter Storm Watch | PHI | 24 hr |
| Jan 25, 4:02 PM EST | Coastal Flood Watch | PHI | 11 hr |
| Jan 26, 2:56 AM EST | Coastal Flood Warning | PHI | 25 hr |
| Jan 26, 3:34 AM EST | Winter Weather Advisory | PHI | 21 hr |
| Jan 30, 3:35 AM EST | Wind Advisory | PHI | 26 hr |
| Feb 1, 4:33 AM EST | Winter Weather Advisory | PHI | 52 hr |
| Feb 2, 4:06 AM EST | Wind Advisory | PHI | 17 hr |
| Feb 8, 4:42 AM EST | Winter Weather Advisory | PHI | 53 hr |
| Feb 12, 3:54 AM EST | Wind Chill Advisory | PHI | 32 hr |
| Feb 12, 5:25 PM EST | Wind Advisory | PHI | 8 hr |
| Feb 13, 4:16 AM EST | High Wind Watch | PHI | 23 hr |
| Feb 14, 3:40 AM EST | Wind Chill Advisory | PHI | 55 hr |
| Feb 14, 3:43 AM EST | High Wind Warning | PHI | 32 hr |
| Feb 15, 10:14 AM EST | Wind Advisory | PHI | 5 hr |
| Feb 15, 3:52 PM EST | Winter Storm Watch | PHI | 12 hr |
| Feb 16, 4:13 AM EST | Winter Storm Warning | PHI | 30 hr |
| Feb 16, 10:33 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 18, 3:53 AM EST | Wind Chill Advisory | PHI | 60 hr |
| Feb 25, 4:14 AM EST | Winter Weather Advisory | PHI | 32 hr |
| Feb 25, 9:54 PM EST | Winter Storm Warning | PHI | 14 hr |
| Feb 28, 3:19 PM EST | Winter Weather Advisory | PHI | 41 hr |
| Mar 1, 3:43 AM EST | Winter Storm Warning | PHI | 18 hr |
| Mar 1, 8:43 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 1, 1:57 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 3, 3:04 PM EST | Winter Storm Watch | PHI | 25 hr |
| Mar 4, 3:47 AM EST | Winter Storm Warning | PHI | 41 hr |
| Mar 4, 8:08 PM EST | Dense Fog Advisory | PHI | 3 hr |
| Mar 5, 11:55 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Apr 14, 5:06 PM EDT | Special Weather Statement | PHI | 69 min |
| Apr 22, 4:05 PM EDT | Severe Thunderstorm Warning | PHI | 25 min |
| Apr 24, 3:28 PM EDT | Frost Advisory | PHI | 17 hr |
| May 7, 8:09 PM EDT | Dense Fog Advisory | PHI | 13 hr |
| May 8, 3:33 PM EDT | Dense Fog Advisory | PHI | 19 hr |
| May 9, 3:41 PM EDT | Dense Fog Advisory | PHI | 19 hr |
| May 10, 3:39 PM EDT | Dense Fog Advisory | PHI | 12 hr |
| May 18, 2:25 PM EDT | Special Weather Statement | PHI | 35 min |
| May 18, 2:30 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| May 27, 12:54 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 27, 2:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 2:13 PM EDT | Special Weather Statement | PHI | 62 min |
| May 29, 2:58 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 1, 4:20 AM EDT | Flash Flood Watch | PHI | 26 hr |
| Jun 1, 7:54 PM EDT | Special Weather Statement | PHI | 111 min |
| Jun 1, 11:32 PM EDT | Areal Flood Advisory | PHI | 6 hr |
| Jun 1, 11:50 PM EDT | Special Weather Statement | PHI | 55 min |
| Jun 6, 1:51 PM EDT | Special Weather Statement | PHI | 39 min |
| Jun 6, 2:18 PM EDT | Areal Flood Advisory | PHI | 57 min |
| Jun 6, 2:59 PM EDT | Special Weather Statement | PHI | 31 min |
| Jun 14, 3:21 PM EDT | Special Weather Statement | PHI | 24 min |
| Jun 14, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | 36 min |
| Jun 14, 4:32 PM EDT | Special Weather Statement | PHI | 28 min |
| Jun 14, 5:06 PM EDT | Special Weather Statement | PHI | 24 min |
| Jun 14, 5:15 PM EDT | Areal Flood Advisory | PHI | 5 hr |
| Jun 14, 5:29 PM EDT | Special Weather Statement | PHI | 31 min |
| Jun 14, 7:21 PM EDT | Special Weather Statement | PHI | 39 min |
| Jun 16, 12:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 2:55 AM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Jun 19, 2:18 PM EDT | Flood Watch | PHI | 40 hr |
| Jun 20, 6:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 20, 8:31 PM EDT | Special Weather Statement | PHI | 3 hr |
| Jun 20, 8:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 20, 8:56 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 20, 10:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 20, 10:32 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jun 21, 12:25 AM EDT | Special Weather Statement | PHI | 35 min |
| Jun 21, 12:35 AM EDT | Severe Thunderstorm Warning | PHI | 55 min |
| Jun 21, 5:12 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jun 23, 1:45 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 23, 4:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 5:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 23, 7:41 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jun 23, 7:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 27, 1:54 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 27, 4:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 30, 6:11 PM EDT | Special Weather Statement | PHI | 34 min |
| Jun 30, 10:40 PM EDT | Special Weather Statement | PHI | 50 min |
| Jul 2, 5:54 AM EDT | Special Weather Statement | PHI | 21 min |
| Jul 2, 10:17 AM EDT | Special Weather Statement | PHI | 58 min |
| Jul 2, 10:28 AM EDT | Special Weather Statement | PHI | 47 min |
| Jul 2, 11:24 AM EDT | Special Weather Statement | PHI | 66 min |
| Jul 6, 4:03 PM EDT | Special Weather Statement | PHI | 57 min |
| Jul 6, 4:54 PM EDT | Special Weather Statement | PHI | 36 min |
| Jul 9, 4:57 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 9, 7:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 9, 8:15 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| Jul 9, 8:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 9, 9:01 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| Jul 9, 9:45 PM EDT | Special Weather Statement | PHI | 30 min |
| Jul 18, 12:44 PM EDT | Heat Advisory | PHI | 55 hr |
| Jul 18, 5:02 PM EDT | Special Weather Statement | PHI | 43 min |
| Jul 18, 5:27 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jul 18, 6:46 PM EDT | Special Weather Statement | PHI | 74 min |
| Jul 20, 3:21 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 20, 3:32 PM EDT | Special Weather Statement | PHI | 13 min |
| Jul 20, 4:00 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Jul 21, 12:50 PM EDT | Special Weather Statement | PHI | 25 min |
| Jul 21, 1:01 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 21, 1:54 PM EDT | Special Weather Statement | PHI | 36 min |
| Jul 21, 2:22 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 21, 2:31 PM EDT | Special Weather Statement | PHI | 44 min |
| Jul 21, 3:01 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 28, 4:48 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 28, 5:31 PM EDT | Special Weather Statement | PHI | 74 min |
| Jul 28, 5:49 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 29, 4:17 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 1, 10:30 PM EDT | Special Weather Statement | PHI | 60 min |
| Aug 1, 10:53 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 2, 12:16 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 4, 3:48 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 4, 6:11 PM EDT | Special Weather Statement | PHI | 64 min |
| Aug 4, 6:20 PM EDT | Severe Thunderstorm Warning | PHI | 20 min |
| Aug 4, 10:24 PM EDT | Special Weather Statement | PHI | 51 min |
| Aug 4, 11:06 PM EDT | Special Weather Statement | PHI | 24 min |
| Aug 4, 11:18 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 4, 11:28 PM EDT | Severe Thunderstorm Warning | PHI | 32 min |
| Aug 4, 11:35 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 4, 11:43 PM EDT | Special Weather Statement | PHI | 47 min |
| Aug 5, 12:04 AM EDT | Special Weather Statement | PHI | 41 min |
| Aug 5, 12:39 AM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 5, 12:52 AM EDT | Special Weather Statement | PHI | 23 min |
| Aug 11, 5:12 PM EDT | Special Weather Statement | PHI | 93 min |
| Aug 20, 2:29 PM EDT | Special Weather Statement | PHI | 46 min |
| Sep 3, 6:34 PM EDT | Special Weather Statement | PHI | 26 min |
| Sep 5, 3:58 AM EDT | Rip Current Statement | PHI | 16 hr |
| Sep 10, 10:42 AM EDT | Special Weather Statement | PHI | 63 min |
| Sep 12, 1:38 PM EDT | Special Weather Statement | PHI | 37 min |
| Sep 20, 9:27 PM EDT | Rip Current Statement | PHI | 71 hr |
| Sep 23, 9:19 PM EDT | Rip Current Statement | PHI | 23 hr |
| Sep 24, 2:31 PM EDT | Coastal Flood Advisory | PHI | 3 days |
| Sep 24, 8:46 PM EDT | Rip Current Statement | PHI | 23 hr |
| Sep 25, 8:40 PM EDT | Rip Current Statement | PHI | 47 hr |
| Sep 27, 8:23 PM EDT | Rip Current Statement | PHI | 24 hr |
| Sep 28, 8:14 PM EDT | Rip Current Statement | PHI | 44 hr |
| Sep 30, 4:11 PM EDT | Coastal Flood Watch | PHI | 37 hr |
| Sep 30, 4:44 PM EDT | High Wind Watch | PHI | 36 hr |
| Oct 1, 4:52 AM EDT | Coastal Flood Warning | PHI | 4 days |
| Oct 1, 3:33 PM EDT | Wind Advisory | PHI | 3 days |
| Oct 2, 4:23 AM EDT | High Wind Warning | PHI | 14 hr |
| Oct 3, 8:22 PM EDT | Coastal Flood Advisory | PHI | 46 hr |
| Oct 9, 6:55 PM EDT | Special Weather Statement | PHI | 95 min |
| Oct 9, 7:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Oct 17, 2:48 PM EDT | Freeze Warning | PHI | 42 hr |
| Oct 18, 3:22 AM EDT | Frost Advisory | PHI | 11 hr |
| Oct 18, 4:54 PM EDT | Special Weather Statement | PHI | 66 min |
| Oct 27, 3:50 PM EDT | Coastal Flood Advisory | PHI | 22 hr |
| Nov 4, 11:06 PM EST | Dense Fog Advisory | PHI | 8 hr |
| Dec 13, 9:46 PM EST | Dense Fog Advisory | PHI | 12 hr |
| Dec 22, 11:26 PM EST | Dense Fog Advisory | PHI | 16 hr |
| Dec 24, 8:25 AM EST | Special Weather Statement | PHI | 35 min |
| Dec 24, 8:36 AM EST | Severe Thunderstorm Warning | PHI | 24 min |
| Dec 24, 12:49 PM EST | Special Weather Statement | PHI | 41 min |
| Dec 24, 1:23 PM EST | Special Weather Statement | PHI | 37 min |
| Dec 24, 10:15 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Dec 25, 1:12 AM EST | Dense Fog Advisory | PHI | 9 hr |
| Dec 26, 12:22 AM EST | Dense Fog Advisory | PHI | 3 hr |
| Dec 27, 3:00 AM EST | Dense Fog Advisory | PHI | 6 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 | 12 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 17 |
| Special Weather Statement | 47 |
| Flooding | |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Areal Flood Advisory | 17 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
| Coast and beach | |
| Coastal Flood Warning | 2 |
| Coastal Flood Watch | 2 |
| Coastal Flood Advisory | 3 |
| Rip Current Statement | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.