Alert archive / Delaware / Sussex County
Weather alerts in Sussex County, Delaware, 2016
201 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 201
- Warnings
- 49
- Watches
- 23
- Advisories
- 64
- Busiest month
- July44 alerts
- Busiest day
- July 28, 201611 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, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 21 | 8 | 62% | 12 | 42% | 25 min |
| Flash flood warnings | 5 | 2 | 60% | 2 | 100% | 72 min |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 4 | 1 | 75% | 2 | 50% | 0 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 192 | 98 | 49% | 402 | 76% | 21 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 37 | 16 | 57% | 28 | 96% | 45 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 9, 2:38 PM EST | Coastal Flood Advisory | PHI | 31 hr |
| Jan 12, 3:30 PM EST | Wind Advisory | PHI | 12 hr |
| Jan 15, 11:48 PM EST | Areal Flood Advisory | PHI | 3 hr |
| Jan 17, 12:55 PM EST | Winter Weather Advisory | PHI | 6 hr |
| Jan 20, 3:21 PM EST | Winter Storm Watch | PHI | 37 hr |
| Jan 20, 4:37 PM EST | Coastal Flood Watch | PHI | 34 hr |
| Jan 21, 10:56 AM EST | High Wind Watch | PHI | 17 hr |
| Jan 22, 2:20 AM EST | Coastal Flood Warning | PHI | 57 hr |
| Jan 22, 3:38 AM EST | High Wind Warning | PHI | 41 hr |
| Jan 22, 4:16 AM EST | Winter Storm Warning | PHI | 44 hr |
| Jan 22, 5:19 PM EST | Special Weather Statement | PHI | 3 hr |
| Feb 4, 3:27 PM EST | Winter Weather Advisory | PHI | 21 hr |
| Feb 7, 3:22 PM EST | Coastal Flood Watch | PHI | 23 hr |
| Feb 7, 3:22 PM EST | Coastal Flood Advisory | PHI | 23 hr |
| Feb 8, 4:06 AM EST | Coastal Flood Warning | PHI | 35 hr |
| Feb 8, 1:59 PM EST | Coastal Flood Advisory | PHI | 36 hr |
| Feb 8, 3:22 PM EST | Winter Weather Advisory | PHI | 30 hr |
| Feb 12, 2:19 PM EST | Wind Advisory | PHI | 28 hr |
| Feb 12, 2:36 PM EST | Wind Chill Advisory | PHI | 42 hr |
| Feb 13, 5:39 AM EST | Special Weather Statement | PHI | 66 min |
| Feb 14, 3:12 PM EST | Winter Weather Advisory | PHI | 40 hr |
| Feb 15, 10:41 AM EST | Winter Storm Warning | PHI | 8 hr |
| Feb 16, 10:34 AM EST | Special Weather Statement | PHI | 41 min |
| Feb 16, 11:15 AM EST | Special Weather Statement | PHI | 60 min |
| Feb 24, 3:19 AM EST | Wind Advisory | PHI | 22 hr |
| Feb 24, 3:06 PM EST | Mesoscale Discussion | SPC | 54 min |
| Feb 24, 3:20 PM EST | Tornado Watch | SPC | 8 hr |
| Feb 24, 5:20 PM EST | Severe Thunderstorm Warning | PHI | 25 min |
| Feb 24, 5:45 PM EST | Severe Thunderstorm Warning | PHI | 30 min |
| Feb 24, 8:48 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Feb 24, 10:50 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Mar 3, 3:32 AM EST | Winter Weather Advisory | PHI | 33 hr |
| Mar 28, 4:00 AM EDT | Wind Advisory | PHI | 20 hr |
| Apr 1, 4:08 AM EDT | High Wind Watch | PHI | 24 hr |
| Apr 1, 9:36 AM EDT | Special Weather Statement | PHI | 24 min |
| Apr 1, 10:07 AM EDT | Special Weather Statement | PHI | 8 min |
| Apr 2, 3:58 AM EDT | High Wind Warning | PHI | 32 hr |
| Apr 4, 4:28 AM EDT | Freeze Watch | PHI | 30 hr |
| Apr 5, 9:59 AM EDT | Freeze Warning | PHI | 23 hr |
| Apr 7, 3:30 AM EDT | Wind Advisory | PHI | 12 hr |
| Apr 7, 10:49 AM EDT | Special Weather Statement | PHI | 86 min |
| Apr 7, 11:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 7, 3:16 PM EDT | Special Weather Statement | PHI | 44 min |
| Apr 7, 6:27 PM EDT | Special Weather Statement | PHI | 48 min |
| Apr 7, 6:37 PM EDT | Severe Thunderstorm Warning | PHI | 38 min |
| Apr 8, 4:00 AM EDT | Freeze Watch | PHI | 17 hr |
| Apr 8, 8:47 PM EDT | Freeze Warning | PHI | 37 hr |
| Apr 13, 6:30 PM EDT | Frost Advisory | PHI | 13 hr |
| Apr 16, 3:29 PM EDT | Frost Advisory | PHI | 17 hr |
| Apr 18, 2:00 PM EDT | Fire Weather Watch | PHI | 13 hr |
| Apr 19, 3:00 AM EDT | Red Flag Warning | PHI | 17 hr |
| Apr 22, 3:15 PM EDT | Special Weather Statement | PHI | 60 min |
| Apr 26, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 26, 6:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 2, 10:15 PM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| May 2, 10:22 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 2, 10:45 PM EDT | Flash Flood Warning | PHI | 6 hr |
| May 2, 10:59 PM EDT | Severe Thunderstorm Warning | PHI | 22 min |
| May 3, 12:11 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 4, 3:49 AM EDT | Coastal Flood Advisory | PHI | 19 hr |
| May 5, 3:57 AM EDT | Coastal Flood Advisory | PHI | 7 hr |
| May 5, 3:57 AM EDT | Coastal Flood Advisory | PHI | 23 hr |
| May 5, 2:45 PM EDT | Coastal Flood Warning | PHI | 34 hr |
| May 7, 12:50 AM EDT | Coastal Flood Advisory | PHI | 26 hr |
| May 14, 3:41 PM EDT | Special Weather Statement | PHI | 79 min |
| May 14, 6:11 PM EDT | Severe Thunderstorm Warning | PHI | 34 min |
| May 30, 5:56 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jun 4, 2:55 PM EDT | Coastal Flood Advisory | PHI | 7 hr |
| Jun 5, 3:12 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 4:05 PM EDT | Special Weather Statement | PHI | 40 min |
| Jun 5, 4:35 PM EDT | Severe Thunderstorm Warning | PHI | 40 min |
| Jun 5, 9:47 PM EDT | Special Weather Statement | PHI | 28 min |
| Jun 8, 12:35 PM EDT | Special Weather Statement | PHI | 40 min |
| Jun 16, 1:20 AM EDT | Special Weather Statement | PHI | 25 min |
| Jun 21, 3:37 AM EDT | Special Weather Statement | PHI | 83 min |
| Jun 21, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 21, 2:51 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Jun 21, 2:55 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jun 21, 3:36 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Jun 21, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Jun 21, 4:28 PM EDT | Special Weather Statement | PHI | 62 min |
| Jun 21, 6:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 21, 6:36 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Jun 21, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | 40 min |
| Jun 24, 12:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 24, 1:55 PM EDT | Special Weather Statement | PHI | 50 min |
| Jun 24, 2:05 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 24, 2:10 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Jun 24, 3:10 PM EDT | Special Weather Statement | PHI | 50 min |
| Jun 24, 3:53 PM EDT | Special Weather Statement | PHI | 52 min |
| Jun 28, 12:01 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 1, 1:56 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 1, 5:05 PM EDT | Special Weather Statement | PHI | 25 min |
| Jul 8, 5:22 PM EDT | Special Weather Statement | PHI | 53 min |
| Jul 9, 2:38 PM EDT | Special Weather Statement | PHI | 22 min |
| Jul 9, 3:13 PM EDT | Special Weather Statement | PHI | 62 min |
| Jul 13, 2:16 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 13, 2:44 PM EDT | Heat Advisory | PHI | 29 hr |
| Jul 13, 3:02 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 13, 4:03 PM EDT | Special Weather Statement | PHI | 27 min |
| Jul 13, 4:39 PM EDT | Special Weather Statement | PHI | 51 min |
| Jul 13, 5:02 PM EDT | Special Weather Statement | PHI | 58 min |
| Jul 18, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 3:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jul 18, 6:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 20, 1:50 AM EDT | Special Weather Statement | PHI | 40 min |
| Jul 20, 1:53 AM EDT | Special Weather Statement | PHI | 22 min |
| Jul 20, 1:55 AM EDT | Special Weather Statement | PHI | 35 min |
| Jul 20, 2:04 AM EDT | Severe Thunderstorm Warning | PHI | 56 min |
| Jul 20, 2:56 AM EDT | Special Weather Statement | PHI | 64 min |
| Jul 20, 3:22 AM EDT | Severe Thunderstorm Warning | PHI | 33 min |
| Jul 20, 4:11 AM EDT | Special Weather Statement | PHI | 49 min |
| Jul 21, 3:34 AM EDT | Excessive Heat Watch | PHI | 61 hr |
| Jul 22, 3:35 PM EDT | Heat Advisory | PHI | 28 hr |
| Jul 23, 4:12 PM EDT | Heat Advisory | PHI | 50 hr |
| Jul 25, 3:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 25, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 5:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 25, 7:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 26, 12:31 AM EDT | Special Weather Statement | PHI | 44 min |
| Jul 26, 9:41 AM EDT | Heat Advisory | PHI | 9 hr |
| Jul 27, 3:53 PM EDT | Flash Flood Watch | PHI | 42 hr |
| Jul 28, 12:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 1:20 PM EDT | Severe Thunderstorm Warning | PHI | 40 min |
| Jul 28, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jul 28, 1:58 PM EDT | Special Weather Statement | PHI | 62 min |
| Jul 28, 4:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 28, 5:24 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Jul 28, 6:15 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 28, 6:25 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jul 28, 6:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 28, 6:53 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 28, 7:22 PM EDT | Special Weather Statement | PHI | 38 min |
| Jul 28, 11:04 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 29, 4:42 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 1, 2:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 1, 2:56 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 1, 3:36 PM EDT | Special Weather Statement | PHI | 84 min |
| Aug 1, 6:20 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 2, 3:27 PM EDT | Coastal Flood Advisory | PHI | 7 hr |
| Aug 10, 3:20 PM EDT | Excessive Heat Warning | PHI | 6 days |
| Aug 11, 11:50 AM EDT | Heat Advisory | PHI | 32 hr |
| Aug 11, 3:24 PM EDT | Excessive Heat Watch | PHI | 37 hr |
| Aug 14, 9:42 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Aug 14, 10:36 PM EDT | Special Weather Statement | PHI | 24 min |
| Aug 15, 3:21 PM EDT | Heat Advisory | PHI | 29 hr |
| Aug 17, 4:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 17, 9:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 17, 10:44 PM EDT | Severe Thunderstorm Warning | PHI | 61 min |
| Aug 17, 11:46 PM EDT | Special Weather Statement | PHI | 59 min |
| Aug 21, 4:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 21, 5:09 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 21, 5:46 PM EDT | Special Weather Statement | PHI | 14 min |
| Aug 21, 5:54 PM EDT | Special Weather Statement | PHI | 36 min |
| Aug 21, 6:31 PM EDT | Special Weather Statement | PHI | 29 min |
| Aug 21, 7:04 PM EDT | Special Weather Statement | PHI | 26 min |
| Aug 29, 6:05 AM EDT | Beach Hazards Statement | PHI | 4 days |
| Aug 31, 5:00 AM EDT | Tropical Storm Warning | NHC | 10 days |
| Sep 1, 4:40 PM EDT | Tropical Storm Watch | PHI | 43 hr |
| Sep 2, 5:41 PM EDT | Tropical Storm Warning | PHI | 4 days |
| Sep 4, 5:04 PM EDT | Coastal Flood Warning | PHI | 14 hr |
| Sep 4, 5:04 PM EDT | Coastal Flood Advisory | PHI | 22 hr |
| Sep 5, 3:24 PM EDT | Rip Current Statement | PHI | 38 hr |
| Sep 6, 11:04 AM EDT | Coastal Flood Advisory | PHI | 4 hr |
| Sep 7, 11:50 AM EDT | Heat Advisory | PHI | 3 days |
| Sep 16, 11:32 AM EDT | Rip Current Statement | PHI | 8 hr |
| Sep 19, 6:28 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Sep 19, 12:34 PM EDT | Areal Flood Advisory | PHI | 8 hr |
| Sep 28, 3:48 PM EDT | Flash Flood Watch | PHI | 43 hr |
| Sep 28, 5:38 PM EDT | Rip Current Statement | PHI | 48 hr |
| Sep 29, 12:21 AM EDT | Areal Flood Advisory | PHI | 8 hr |
| Sep 29, 1:38 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Sep 29, 2:13 AM EDT | Flash Flood Warning | PHI | 9 hr |
| Sep 29, 4:28 AM EDT | Flash Flood Warning | PHI | 5 hr |
| Sep 29, 5:08 AM EDT | Coastal Flood Advisory | PHI | 8 hr |
| Sep 29, 10:27 AM EDT | Coastal Flood Warning | PHI | 15 hr |
| Sep 29, 12:59 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Sep 29, 2:32 PM EDT | Areal Flood Warning | PHI | 15 hr |
| Sep 29, 2:45 PM EDT | Wind Advisory | PHI | 20 hr |
| Sep 30, 1:40 AM EDT | Coastal Flood Advisory | PHI | 13 hr |
| Sep 30, 5:29 AM EDT | Areal Flood Warning | PHI | 4 hr |
| Sep 30, 9:02 AM EDT | Areal Flood Warning | PHI | 39 hr |
| Sep 30, 3:03 PM EDT | Coastal Flood Advisory | PHI | 20 hr |
| Sep 30, 6:04 PM EDT | Rip Current Statement | PHI | 3 hr |
| Oct 8, 9:33 AM EDT | Flash Flood Watch | PHI | 26 hr |
| Oct 8, 8:20 PM EDT | Wind Advisory | PHI | 31 hr |
| Oct 9, 12:50 AM EDT | Areal Flood Advisory | PHI | 8 hr |
| Oct 9, 4:46 AM EDT | Areal Flood Warning | PHI | 8 hr |
| Oct 9, 7:36 AM EDT | Areal Flood Warning | PHI | 5 hr |
| Oct 9, 4:16 PM EDT | Areal Flood Warning | PHI | 9 hr |
| Oct 9, 9:41 PM EDT | Areal Flood Warning | PHI | 12 hr |
| Oct 25, 3:54 AM EDT | Frost Advisory | PHI | 29 hr |
| Nov 7, 3:42 PM EST | Frost Advisory | PHI | 16 hr |
| Nov 11, 3:26 PM EST | Freeze Watch | PHI | 23 hr |
| Nov 11, 4:45 PM EST | Frost Advisory | PHI | 15 hr |
| Nov 12, 2:31 PM EST | Freeze Warning | PHI | 17 hr |
| Nov 19, 3:42 AM EST | Wind Advisory | PHI | 63 hr |
| Nov 30, 3:14 AM EST | Dense Fog Advisory | PHI | 8 hr |
| Dec 16, 3:45 AM EST | Winter Weather Advisory | PHI | 37 hr |
| Dec 17, 7:28 PM EST | Dense Fog Advisory | PHI | 11 hr |
| Dec 18, 3:52 PM EST | Special Weather Statement | PHI | 38 min |
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 archive20152017
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.