Alert archive / Maryland / Cecil County
Weather alerts in Cecil County, Maryland, 2018
187 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cecil County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 187
- Warnings
- 39
- Watches
- 28
- Advisories
- 80
- Busiest month
- July33 alerts
- Busiest day
- May 12, 20188 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Cecil County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 18 | 6 | 67% | 3 | 67% | 6 min |
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 10 | 2 | 80% | 4 | 50% | 6 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 110 | 56 | 49% | 277 | 81% | 27 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 113 | 54 | 52% | 174 | 94% | 92 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 3, 4:03 AM EST | Winter Weather Advisory | PHI | 38 hr |
| Jan 4, 3:48 AM EST | Wind Chill Advisory | PHI | 3 days |
| Jan 7, 2:50 PM EST | Winter Weather Advisory | PHI | 33 hr |
| Jan 11, 2:34 PM EST | Wind Advisory | PHI | 13 hr |
| Jan 23, 9:58 AM EST | Special Weather Statement | PHI | 47 min |
| Jan 23, 10:42 AM EST | Special Weather Statement | PHI | 48 min |
| Feb 4, 6:01 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Feb 6, 3:37 PM EST | Winter Weather Advisory | PHI | 27 hr |
| Feb 10, 3:20 AM EST | Flood Watch | PHI | 39 hr |
| Feb 10, 6:45 PM EST | Areal Flood Advisory | PHI | 2 hr |
| Feb 10, 10:58 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Feb 10, 11:01 PM EST | Dense Fog Advisory | PHI | 8 hr |
| Feb 11, 5:07 AM EST | Areal Flood Advisory | PHI | 4 hr |
| Feb 11, 10:57 AM EST | Areal Flood Advisory | PHI | 12 hr |
| Feb 17, 3:45 AM EST | Winter Weather Advisory | PHI | 20 hr |
| Feb 19, 11:00 PM EST | Dense Fog Advisory | PHI | 11 hr |
| Feb 24, 3:24 AM EST | Dense Fog Advisory | PHI | 5 hr |
| Feb 25, 10:36 PM EST | Dense Fog Advisory | PHI | 7 hr |
| Feb 28, 3:12 PM EST | High Wind Watch | PHI | 24 hr |
| Mar 1, 11:44 AM EST | High Wind Warning | PHI | 40 hr |
| Mar 1, 3:30 PM EST | Wind Advisory | PHI | 45 hr |
| Mar 5, 3:34 AM EST | Winter Storm Watch | PHI | 36 hr |
| Mar 6, 3:37 AM EST | Winter Storm Warning | PHI | 41 hr |
| Mar 6, 2:30 PM EST | Coastal Flood Advisory | PHI | 37 hr |
| Mar 6, 3:40 PM EST | Winter Weather Advisory | PHI | 12 hr |
| Mar 7, 5:55 AM EST | Coastal Flood Warning | PHI | 4 hr |
| Mar 19, 3:36 PM EDT | Winter Storm Watch | PHI | 13 hr |
| Mar 19, 3:36 PM EDT | Winter Weather Advisory | PHI | 13 hr |
| Mar 20, 4:41 AM EDT | Winter Storm Warning | PHI | 47 hr |
| Mar 20, 12:19 PM EDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 25, 9:17 AM EDT | Special Weather Statement | PHI | 118 min |
| Mar 30, 1:40 PM EDT | Special Weather Statement | PHI | 50 min |
| Apr 1, 4:08 AM EDT | Winter Weather Advisory | PHI | 33 hr |
| Apr 3, 3:32 PM EDT | Wind Advisory | PHI | 28 hr |
| Apr 4, 12:01 AM EDT | Dense Fog Advisory | PHI | 10 hr |
| Apr 16, 3:56 AM EDT | Severe Thunderstorm Warning | PHI | 24 min |
| Apr 16, 4:23 AM EDT | Special Weather Statement | PHI | 37 min |
| Apr 16, 4:38 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 16, 4:55 AM EDT | Special Weather Statement | PHI | 50 min |
| Apr 16, 5:34 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Apr 16, 12:04 PM EDT | Special Weather Statement | PHI | 26 min |
| Apr 16, 1:18 PM EDT | Coastal Flood Advisory | PHI | 13 hr |
| Apr 17, 2:36 PM EDT | Freeze Warning | PHI | 17 hr |
| Apr 19, 3:04 PM EDT | Freeze Warning | PHI | 17 hr |
| Apr 20, 3:35 PM EDT | Freeze Warning | PHI | 16 hr |
| Apr 28, 5:16 AM EDT | Dense Fog Advisory | PHI | 4 hr |
| Apr 28, 8:12 PM EDT | Special Weather Statement | PHI | 33 min |
| Apr 29, 3:32 PM EDT | Fire Weather Watch | PHI | 12 hr |
| Apr 30, 3:31 AM EDT | Red Flag Warning | PHI | 16 hr |
| May 4, 10:28 PM EDT | Special Weather Statement | PHI | 62 min |
| May 10, 6:51 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| May 12, 3:59 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 12, 4:58 PM EDT | Tornado Watch | SPC | 5 hr |
| May 12, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | 44 min |
| May 12, 7:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 12, 7:25 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| May 12, 7:43 PM EDT | Special Weather Statement | PHI | 32 min |
| May 12, 7:45 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| May 12, 7:57 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 12, 8:11 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| May 13, 10:17 PM EDT | Special Weather Statement | PHI | 28 min |
| May 15, 3:40 AM EDT | Flash Flood Watch | PHI | 21 hr |
| May 15, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 15, 3:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 15, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | 40 min |
| May 15, 6:58 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 15, 7:18 PM EDT | Severe Thunderstorm Warning | PHI | 57 min |
| May 16, 3:35 PM EDT | Flood Watch | PHI | 3 days |
| May 17, 2:32 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 19, 9:27 PM EDT | Dense Fog Advisory | PHI | 9 hr |
| May 26, 11:38 PM EDT | Flash Flood Watch | PHI | 23 hr |
| Jun 2, 12:42 AM EDT | Special Weather Statement | PHI | 63 min |
| Jun 2, 3:26 AM EDT | Flash Flood Watch | PHI | 24 hr |
| Jun 2, 2:15 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 2, 11:27 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jun 3, 6:16 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 5, 3:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 1:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 3:48 AM EDT | Flash Flood Watch | PHI | 28 hr |
| Jun 11, 1:16 AM EDT | Areal Flood Advisory | PHI | 8 hr |
| Jun 11, 3:16 AM EDT | Areal Flood Advisory | PHI | 8 hr |
| Jun 24, 6:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 27, 7:37 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 29, 3:41 PM EDT | Heat Advisory | PHI | 5 days |
| Jul 3, 7:39 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Jul 3, 7:54 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 5, 2:59 PM EDT | Flash Flood Watch | PHI | 20 hr |
| Jul 17, 2:50 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 20, 2:44 PM EDT | Flash Flood Watch | PHI | 34 hr |
| Jul 22, 1:41 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| Jul 22, 2:32 PM EDT | Special Weather Statement | PHI | 43 min |
| Jul 22, 4:13 PM EDT | Special Weather Statement | PHI | 32 min |
| Jul 22, 4:44 PM EDT | Special Weather Statement | PHI | 31 min |
| Jul 22, 5:30 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 22, 8:18 PM EDT | Areal Flood Warning | PHI | 117 min |
| Jul 22, 10:09 PM EDT | Areal Flood Warning | PHI | 3 hr |
| Jul 23, 12:46 AM EDT | Areal Flood Warning | PHI | 4 hr |
| Jul 23, 3:45 AM EDT | Flash Flood Watch | PHI | 68 hr |
| Jul 23, 12:28 PM EDT | Special Weather Statement | PHI | 32 min |
| Jul 23, 1:01 PM EDT | Areal Flood Advisory | PHI | 34 min |
| Jul 23, 2:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 12:56 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 24, 3:03 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 24, 3:24 AM EDT | Flash Flood Warning | PHI | 3 hr |
| Jul 24, 4:56 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 24, 12:50 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 25, 3:16 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 25, 4:34 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jul 25, 8:16 PM EDT | River Flood Warning | PHI | 56 hr |
| Jul 25, 8:24 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jul 27, 9:50 AM EDT | Flash Flood Watch | PHI | 13 hr |
| Jul 27, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 27, 4:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 27, 5:44 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 27, 6:03 PM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Jul 27, 6:06 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 27, 7:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Aug 1, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | 47 min |
| Aug 1, 11:35 PM EDT | Severe Thunderstorm Warning | PHI | 20 min |
| Aug 2, 11:46 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 8, 10:42 PM EDT | Special Weather Statement | PHI | 63 min |
| Aug 11, 3:24 AM EDT | Flash Flood Watch | PHI | 20 hr |
| Aug 11, 4:19 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 11, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | 29 min |
| Aug 11, 5:20 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 11, 5:24 PM EDT | Special Weather Statement | PHI | 36 min |
| Aug 11, 6:12 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 11, 9:11 PM EDT | Areal Flood Advisory | PHI | 81 min |
| Aug 12, 10:08 PM EDT | Flash Flood Watch | PHI | 24 hr |
| Aug 13, 5:12 AM EDT | Areal Flood Advisory | PHI | 103 min |
| Aug 13, 6:57 PM EDT | Special Weather Statement | PHI | 48 min |
| Aug 13, 7:17 PM EDT | Special Weather Statement | PHI | 28 min |
| Aug 18, 12:56 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 18, 3:16 AM EDT | Flash Flood Watch | PHI | 20 hr |
| Aug 21, 7:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 21, 8:05 PM EDT | Special Weather Statement | PHI | 40 min |
| Aug 22, 12:32 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 27, 2:58 AM EDT | Heat Advisory | PHI | 65 hr |
| Aug 31, 4:41 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Aug 31, 5:38 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Sep 3, 3:02 AM EDT | Heat Advisory | PHI | 4 days |
| Sep 8, 3:34 AM EDT | Flood Watch | PHI | 60 hr |
| Sep 8, 8:15 AM EDT | Areal Flood Advisory | PHI | 119 min |
| Sep 12, 2:05 AM EDT | Dense Fog Advisory | PHI | 8 hr |
| Sep 12, 4:36 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 18, 2:09 AM EDT | Special Weather Statement | PHI | 81 min |
| Sep 18, 2:38 AM EDT | Areal Flood Advisory | PHI | 4 hr |
| Sep 18, 9:27 AM EDT | Flash Flood Watch | PHI | 6 hr |
| Sep 24, 4:27 AM EDT | Coastal Flood Advisory | PHI | 42 hr |
| Sep 26, 3:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 26, 5:02 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 26, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Sep 26, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | 43 min |
| Sep 26, 7:31 PM EDT | Areal Flood Advisory | PHI | 106 min |
| Sep 26, 7:53 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| Sep 27, 3:24 AM EDT | Flood Watch | PHI | 27 hr |
| Sep 28, 3:03 AM EDT | Areal Flood Advisory | PHI | 6 hr |
| Oct 10, 3:16 PM EDT | Flash Flood Watch | PHI | 38 hr |
| Oct 11, 3:24 AM EDT | Wind Advisory | PHI | 31 hr |
| Oct 11, 8:27 PM EDT | Areal Flood Advisory | PHI | 8 hr |
| Oct 18, 3:05 AM EDT | Frost Advisory | PHI | 30 hr |
| Oct 20, 10:38 PM EDT | Special Weather Statement | PHI | 22 min |
| Oct 21, 3:07 AM EDT | Frost Advisory | PHI | 30 hr |
| Oct 24, 3:12 PM EDT | Frost Advisory | PHI | 18 hr |
| Nov 2, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Nov 2, 9:48 PM EDT | Special Weather Statement | PHI | 27 min |
| Nov 2, 10:09 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Nov 2, 10:45 PM EDT | Areal Flood Warning | PHI | 13 hr |
| Nov 5, 1:55 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Nov 6, 11:47 AM EST | Areal Flood Advisory | PHI | 2 hr |
| Nov 9, 2:03 PM EST | Freeze Warning | PHI | 43 hr |
| Nov 14, 3:31 PM EST | Winter Weather Advisory | PHI | 29 hr |
| Nov 15, 9:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 24, 5:52 PM EST | Areal Flood Advisory | PHI | 6 hr |
| Nov 25, 3:25 PM EST | Coastal Flood Advisory | PHI | 34 hr |
| Nov 25, 3:35 PM EST | Flood Watch | PHI | 27 hr |
| Nov 27, 3:13 PM EST | Wind Advisory | PHI | 27 hr |
| Dec 2, 8:24 AM EST | Dense Fog Advisory | PHI | 21 hr |
| Dec 14, 7:44 AM EST | Dense Fog Advisory | PHI | 3 hr |
| Dec 16, 12:28 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Dec 16, 3:41 PM EST | Areal Flood Warning | PHI | 4 hr |
| Dec 18, 3:16 PM EST | Flood Watch | PHI | 3 days |
| Dec 21, 4:02 AM EST | Areal Flood Warning | PHI | 4 hr |
| Dec 21, 4:43 AM EST | Areal Flood Warning | PHI | 8 hr |
| Dec 21, 8:04 AM EST | Areal Flood Warning | PHI | 7 hr |
| Dec 27, 3:13 PM EST | Flood Watch | PHI | 28 hr |
| Dec 28, 8:57 PM EST | Dense Fog Advisory | PHI | 9 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 | 18 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 24 |
| Flooding | |
| Areal Flood Warning | 8 |
| Flash Flood Warning | 3 |
| River Flood Warning | 1 |
| Flash Flood Watch | 13 |
| Flood Watch | 7 |
| Areal Flood Advisory | 45 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.