Alert archive / Maryland / Kent County
Weather alerts in Kent County, Maryland, 2017
152 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Kent County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 152
- Warnings
- 38
- Watches
- 14
- Advisories
- 52
- Busiest month
- July46 alerts
- Busiest day
- August 18, 201710 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 2 tornado warnings covering Kent County in 2017 had a tornado report inside them.
Kent County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 30 | 17 | 43% | 3 | 67% | 15 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 13 | 1 | 92% | 6 | 33% | 2 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 197 | 120 | 39% | 396 | 79% | 26 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 52 | 15 | 71% | 54 | 78% | 91 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 5, 11:13 AM EST | Winter Weather Advisory | PHI | 18 hr |
| Jan 6, 4:42 PM EST | Winter Weather Advisory | PHI | 25 hr |
| Jan 14, 3:25 AM EST | Winter Weather Advisory | PHI | 19 hr |
| Jan 21, 3:29 PM EST | Dense Fog Advisory | PHI | 22 hr |
| Jan 22, 3:44 AM EST | High Wind Warning | PHI | 40 hr |
| Jan 22, 3:44 AM EST | Wind Advisory | PHI | 38 hr |
| Jan 26, 11:15 AM EST | Wind Advisory | PHI | 7 hr |
| Jan 29, 3:24 AM EST | Winter Weather Advisory | PHI | 29 hr |
| Feb 8, 4:01 AM EST | Winter Weather Advisory | PHI | 32 hr |
| Feb 9, 3:35 AM EST | Wind Advisory | PHI | 18 hr |
| Feb 12, 3:55 AM EST | High Wind Watch | PHI | 11 hr |
| Feb 12, 2:45 PM EST | High Wind Warning | PHI | 22 hr |
| Feb 12, 2:45 PM EST | Wind Advisory | PHI | 27 hr |
| Feb 12, 11:14 PM EST | Severe Thunderstorm Warning | PHI | 46 min |
| Feb 23, 2:58 AM EST | Dense Fog Advisory | PHI | 7 hr |
| Feb 25, 12:24 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 25, 1:30 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 25, 3:05 PM EST | Special Weather Statement | PHI | 55 min |
| Feb 25, 4:04 PM EST | Severe Thunderstorm Warning | PHI | 41 min |
| Feb 25, 4:11 PM EST | Severe Thunderstorm Warning | PHI | 49 min |
| Feb 25, 4:26 PM EST | Mesoscale Discussion | SPC | 94 min |
| Feb 25, 5:07 PM EST | Special Weather Statement | PHI | 38 min |
| Mar 1, 1:13 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 1, 2:00 PM EST | Severe Thunderstorm Warning | PHI | 45 min |
| Mar 1, 2:09 PM EST | Severe Thunderstorm Warning | PHI | 51 min |
| Mar 1, 3:09 PM EST | Wind Advisory | PHI | 19 hr |
| Mar 10, 5:23 PM EST | Special Weather Statement | PHI | 52 min |
| Mar 12, 3:08 PM EDT | Winter Storm Warning | PHI | 48 hr |
| Mar 13, 4:21 AM EDT | Winter Weather Advisory | PHI | 33 hr |
| Mar 14, 5:57 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Mar 14, 9:02 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Mar 15, 3:41 AM EDT | Wind Advisory | PHI | 16 hr |
| Mar 27, 3:30 AM EDT | Dense Fog Advisory | PHI | 6 hr |
| Apr 5, 2:50 PM EDT | Wind Advisory | PHI | 25 hr |
| Apr 6, 11:58 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 6, 12:17 PM EDT | Severe Thunderstorm Warning | PHI | 24 min |
| Apr 6, 12:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 6, 12:45 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 6, 2:13 PM EDT | Special Weather Statement | PHI | 47 min |
| Apr 6, 3:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 6, 4:02 PM EDT | Areal Flood Advisory | PHI | 6 hr |
| Apr 7, 12:38 AM EDT | Coastal Flood Advisory | PHI | 5 hr |
| Apr 20, 9:47 PM EDT | Special Weather Statement | PHI | 28 min |
| Apr 30, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 5, 9:00 AM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| May 5, 10:00 AM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| May 19, 3:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 19, 4:40 PM EDT | Special Weather Statement | PHI | 35 min |
| May 19, 5:12 PM EDT | Special Weather Statement | PHI | 48 min |
| May 19, 8:13 PM EDT | Severe Thunderstorm Warning | PHI | 32 min |
| May 22, 7:25 AM EDT | Areal Flood Advisory | PHI | 9 hr |
| May 25, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| May 25, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| May 25, 7:56 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Jun 19, 11:13 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 19, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 2:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 19, 3:45 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 19, 4:17 PM EDT | Special Weather Statement | PHI | 58 min |
| Jun 19, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| Jun 19, 5:14 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 19, 8:32 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 21, 2:38 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 21, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Jun 23, 8:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 1, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 1, 4:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 4:12 PM EDT | Special Weather Statement | PHI | 33 min |
| Jul 1, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | 67 min |
| Jul 1, 5:20 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 6, 4:08 PM EDT | Special Weather Statement | PHI | 67 min |
| Jul 6, 4:16 PM EDT | Flash Flood Watch | PHI | 3 hr |
| Jul 6, 4:17 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 6, 5:39 PM EDT | Special Weather Statement | PHI | 66 min |
| Jul 6, 6:15 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 6, 7:36 PM EDT | Areal Flood Warning | PHI | 10 hr |
| Jul 12, 3:10 PM EDT | Heat Advisory | PHI | 29 hr |
| Jul 13, 11:09 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 13, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jul 13, 7:23 PM EDT | Special Weather Statement | PHI | 52 min |
| Jul 14, 11:40 AM EDT | Flash Flood Watch | PHI | 11 hr |
| Jul 14, 12:06 PM EDT | Heat Advisory | PHI | 7 hr |
| Jul 14, 1:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 14, 3:57 PM EDT | Flash Flood Warning | PHI | 2 hr |
| Jul 14, 4:05 PM EDT | Special Weather Statement | PHI | 40 min |
| Jul 14, 4:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 14, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jul 15, 11:35 AM EDT | Tornado Warning | PHI | 25 min |
| Jul 17, 4:46 PM EDT | Areal Flood Advisory | PHI | 119 min |
| Jul 17, 5:11 PM EDT | Special Weather Statement | PHI | 49 min |
| Jul 17, 6:13 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jul 20, 3:43 AM EDT | Heat Advisory | PHI | 15 hr |
| Jul 22, 1:12 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 2:38 PM EDT | Special Weather Statement | PHI | 67 min |
| Jul 23, 3:44 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 3:53 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 24, 12:41 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 1:05 AM EDT | Severe Thunderstorm Warning | PHI | 55 min |
| Jul 24, 1:27 AM EDT | Tornado Warning | PHI | 21 min |
| Jul 24, 1:52 AM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Jul 24, 2:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 24, 6:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 9:52 PM EDT | Severe Thunderstorm Warning | PHI | 38 min |
| Jul 24, 10:06 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| Jul 27, 3:08 PM EDT | Flash Flood Watch | PHI | 42 hr |
| Jul 28, 5:06 AM EDT | Special Weather Statement | PHI | 54 min |
| Jul 28, 11:13 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 29, 1:38 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 29, 3:03 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 2, 1:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 6:00 PM EDT | Special Weather Statement | PHI | 30 min |
| Aug 2, 6:28 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 2, 6:55 PM EDT | Severe Thunderstorm Warning | PHI | 35 min |
| Aug 2, 8:38 PM EDT | Special Weather Statement | PHI | 37 min |
| Aug 2, 9:12 PM EDT | Severe Thunderstorm Warning | PHI | 34 min |
| Aug 3, 6:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 6, 3:12 PM EDT | Flash Flood Watch | PHI | 26 hr |
| Aug 7, 8:54 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 12, 8:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 15, 1:39 PM EDT | Special Weather Statement | PHI | 66 min |
| Aug 15, 3:21 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 16, 3:11 AM EDT | Dense Fog Advisory | PHI | 5 hr |
| Aug 18, 3:39 AM EDT | Flash Flood Watch | PHI | 18 hr |
| Aug 18, 1:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 2:27 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 18, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 18, 5:03 PM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Aug 18, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | 66 min |
| Aug 18, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Aug 18, 6:12 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 18, 7:07 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Aug 18, 7:53 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Aug 19, 10:02 PM EDT | Special Weather Statement | PHI | 28 min |
| Aug 19, 10:29 PM EDT | Special Weather Statement | PHI | 31 min |
| Aug 21, 5:03 PM EDT | Special Weather Statement | PHI | 27 min |
| Aug 22, 10:07 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Aug 22, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | 62 min |
| Aug 23, 1:56 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 29, 2:14 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 29, 2:26 PM EDT | Areal Flood Advisory | PHI | 6 hr |
| Sep 5, 5:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Oct 23, 3:04 PM EDT | Wind Advisory | PHI | 24 hr |
| Oct 24, 5:54 AM EDT | Coastal Flood Advisory | PHI | 6 hr |
| Oct 29, 3:23 AM EDT | Wind Advisory | PHI | 32 hr |
| Nov 9, 3:34 AM EST | Freeze Watch | PHI | 11 hr |
| Nov 9, 2:15 PM EST | Freeze Warning | PHI | 44 hr |
| Nov 18, 2:46 PM EST | Wind Advisory | PHI | 24 hr |
| Dec 8, 3:04 AM EST | Winter Weather Advisory | PHI | 45 hr |
| Dec 15, 3:26 AM EST | Winter Weather Advisory | PHI | 18 hr |
| Dec 24, 3:18 AM EST | Wind Advisory | PHI | 35 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 | 30 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 7 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 22 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 24 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 11 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Coast and beach | |
| Coastal Flood Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.