Alert archive / Maryland / Caroline County
Weather alerts in Caroline County, Maryland, 2018
175 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Caroline County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 175
- Warnings
- 30
- Watches
- 19
- Advisories
- 71
- Busiest month
- May30 alerts
- Busiest day
- May 13, 20187 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Caroline County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 8 | 27% | 0 | ||
| Flash flood warnings | 8 | 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 Storm Warning | PHI | 38 hr |
| 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, 2:24 PM EST | Special Weather Statement | AKQ | 36 min |
| 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 11, 2:27 AM EST | Areal Flood Advisory | PHI | 4 hr |
| Feb 11, 5:07 AM EST | Areal Flood Advisory | PHI | 4 hr |
| Feb 11, 6:58 AM EST | Areal Flood Warning | PHI | 18 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, 5:31 AM EST | Dense Fog Advisory | PHI | 6 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 6, 2:30 PM EST | Coastal Flood Advisory | PHI | 15 hr |
| Mar 6, 2:30 PM EST | Coastal Flood Advisory | PHI | 37 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 20, 4:41 AM EDT | Winter Storm Warning | PHI | 47 hr |
| Apr 3, 3:32 PM EDT | Wind Advisory | PHI | 28 hr |
| Apr 4, 1:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 15, 6:08 AM EDT | Coastal Flood Advisory | PHI | 39 hr |
| 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 20, 3:35 PM EDT | Frost Advisory | PHI | 16 hr |
| Apr 25, 7:28 PM EDT | Areal Flood Advisory | PHI | 5 hr |
| 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 12, 4:58 PM EDT | Tornado Watch | SPC | 5 hr |
| 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, 7:57 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 12, 8:11 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| May 12, 8:40 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| May 12, 8:50 PM EDT | Flash Flood Warning | PHI | 3 hr |
| May 12, 8:51 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| May 12, 9:14 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| May 12, 9:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 12, 9:27 PM EDT | Severe Thunderstorm Warning | PHI | 63 min |
| May 13, 11:20 PM EDT | Special Weather Statement | PHI | 55 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, 5:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 15, 8:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| May 15, 8:43 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 15, 10:01 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 16, 3:35 PM EDT | Flood Watch | PHI | 3 days |
| May 18, 5:44 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| May 18, 8:34 AM EDT | Areal Flood Advisory | PHI | 10 hr |
| May 19, 5:12 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| May 19, 1:50 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 19, 8:41 PM EDT | Areal Flood Warning | PHI | 21 hr |
| May 26, 11:38 PM EDT | Flash Flood Watch | PHI | 23 hr |
| May 27, 4:52 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 27, 5:14 PM EDT | Special Weather Statement | PHI | 61 min |
| May 27, 6:18 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| May 27, 7:46 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| May 30, 4:43 AM EDT | Dense Fog Advisory | PHI | 4 hr |
| Jun 2, 3:26 AM EDT | Flash Flood Watch | PHI | 24 hr |
| Jun 5, 3:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | 40 min |
| Jun 9, 1:21 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| Jun 9, 1:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 2:00 PM EDT | Special Weather Statement | PHI | 30 min |
| Jun 9, 2:24 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Jun 9, 2:42 PM EDT | Areal Flood Advisory | PHI | 58 min |
| Jun 9, 5:31 PM EDT | Special Weather Statement | PHI | 44 min |
| Jun 10, 3:48 AM EDT | Flash Flood Watch | PHI | 28 hr |
| Jun 10, 3:50 PM EDT | Special Weather Statement | PHI | 40 min |
| Jun 10, 5:00 PM EDT | Flash Flood Warning | PHI | 108 min |
| Jun 10, 7:45 PM EDT | Special Weather Statement | PHI | 60 min |
| Jun 10, 9:07 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 11, 3:16 AM EDT | Areal Flood Advisory | PHI | 8 hr |
| Jun 19, 12:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 24, 8:22 PM EDT | Special Weather Statement | PHI | 23 min |
| Jun 24, 8:30 PM EDT | Severe Thunderstorm Warning | PHI | 45 min |
| Jun 27, 7:37 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 29, 3:41 PM EDT | Heat Advisory | PHI | 5 days |
| Jul 5, 2:18 PM EDT | Special Weather Statement | PHI | 42 min |
| Jul 6, 9:52 AM EDT | Special Weather Statement | PHI | 23 min |
| Jul 17, 4:31 PM EDT | Special Weather Statement | PHI | 29 min |
| Jul 17, 5:06 PM EDT | Special Weather Statement | PHI | 24 min |
| Jul 17, 5:28 PM EDT | Special Weather Statement | PHI | 47 min |
| Jul 20, 2:44 PM EDT | Flash Flood Watch | PHI | 34 hr |
| Jul 21, 3:03 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 23, 2:57 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 3:45 AM EDT | Flash Flood Watch | PHI | 68 hr |
| Jul 23, 10:50 AM EDT | Areal Flood Advisory | PHI | 110 min |
| Jul 23, 2:40 PM EDT | Mesoscale Discussion | SPC | 3 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, 10:31 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 24, 12:45 PM EDT | Special Weather Statement | PHI | 30 min |
| Jul 25, 1:57 PM EDT | Special Weather Statement | PHI | 33 min |
| Jul 25, 2:29 PM EDT | Special Weather Statement | PHI | 46 min |
| Jul 25, 3:16 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 25, 5:17 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 25, 6:00 PM EDT | Flash Flood Warning | PHI | 3 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, 5:08 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Jul 27, 7:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 31, 7:56 PM EDT | Special Weather Statement | PHI | 94 min |
| Jul 31, 9:04 PM EDT | Areal Flood Advisory | PHI | 117 min |
| Jul 31, 9:10 PM EDT | Special Weather Statement | PHI | 95 min |
| Aug 1, 12:57 AM EDT | Special Weather Statement | PHI | 48 min |
| Aug 1, 1:42 AM EDT | Special Weather Statement | PHI | 33 min |
| Aug 1, 3:17 AM EDT | Special Weather Statement | PHI | 43 min |
| Aug 7, 8:51 PM EDT | Special Weather Statement | PHI | 39 min |
| Aug 9, 12:03 AM EDT | Special Weather Statement | PHI | 57 min |
| Aug 11, 6:45 PM EDT | Flash Flood Warning | PHI | 5 hr |
| Aug 11, 6:55 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Aug 11, 7:42 PM EDT | Special Weather Statement | PHI | 48 min |
| Aug 13, 8:55 PM EDT | Special Weather Statement | PHI | 50 min |
| Aug 21, 2:56 PM EDT | Special Weather Statement | PHI | 94 min |
| Aug 21, 7:07 PM EDT | Special Weather Statement | PHI | 53 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, 5:38 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Sep 3, 3:02 AM EDT | Heat Advisory | PHI | 4 days |
| Sep 5, 5:30 PM EDT | Special Weather Statement | AKQ | 30 min |
| Sep 5, 5:58 PM EDT | Special Weather Statement | PHI | 62 min |
| Sep 5, 6:40 PM EDT | Special Weather Statement | PHI | 65 min |
| Sep 7, 3:20 PM EDT | Special Weather Statement | PHI | 40 min |
| Sep 7, 4:12 PM EDT | Areal Flood Advisory | PHI | 94 min |
| Sep 10, 4:40 AM EDT | Coastal Flood Advisory | PHI | 3 hr |
| Sep 10, 5:02 AM EDT | Coastal Flood Advisory | PHI | 21 hr |
| Sep 11, 4:40 AM EDT | Coastal Flood Advisory | PHI | 10 hr |
| Sep 11, 5:48 AM EDT | Coastal Flood Advisory | PHI | 14 hr |
| Sep 11, 2:31 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Sep 11, 2:45 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 11, 3:29 PM EDT | Special Weather Statement | AKQ | 46 min |
| Sep 12, 2:05 AM EDT | Dense Fog Advisory | PHI | 8 hr |
| Sep 14, 11:29 AM EDT | Coastal Flood Advisory | PHI | 17 hr |
| Sep 21, 3:01 AM EDT | Coastal Flood Advisory | PHI | 6 hr |
| Sep 24, 4:27 AM EDT | Coastal Flood Advisory | PHI | 42 hr |
| Sep 26, 5:02 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 26, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | 43 min |
| Sep 26, 8:53 PM EDT | Special Weather Statement | PHI | 37 min |
| Oct 8, 4:26 PM EDT | Flash Flood Warning | PHI | 3 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, 7:00 PM EDT | Areal Flood Advisory | PHI | 4 hr |
| Oct 11, 10:06 PM EDT | Flash Flood Warning | PHI | 6 hr |
| Oct 11, 11:47 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Oct 12, 3:28 AM EDT | Areal Flood Warning | PHI | 6 hr |
| Oct 12, 3:36 AM EDT | Areal Flood Warning | PHI | 6 hr |
| Oct 16, 1:05 AM EDT | Special Weather Statement | PHI | 40 min |
| Oct 18, 3:05 AM EDT | Frost Advisory | PHI | 30 hr |
| Oct 20, 3:40 PM EDT | Wind Advisory | PHI | 19 hr |
| Oct 20, 11:16 PM EDT | Special Weather Statement | PHI | 59 min |
| Oct 24, 3:12 PM EDT | Frost Advisory | PHI | 18 hr |
| Nov 2, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Nov 2, 11:43 PM EDT | Special Weather Statement | PHI | 32 min |
| Nov 5, 1:55 PM EST | Areal Flood Advisory | PHI | 4 hr |
| Nov 6, 12:11 PM EST | Mesoscale Discussion | SPC | 94 min |
| Nov 6, 12:13 PM EST | Special Weather Statement | PHI | 62 min |
| 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, 2:45 AM EST | Flood Watch | PHI | 13 hr |
| Nov 25, 3:25 PM EST | Coastal Flood Advisory | PHI | 34 hr |
| Nov 27, 3:13 PM EST | Wind Advisory | PHI | 27 hr |
| Dec 14, 7:44 AM EST | Dense Fog Advisory | PHI | 3 hr |
| Dec 18, 3:16 PM EST | Flood Watch | PHI | 3 days |
| Dec 21, 4:43 AM EST | Areal Flood Warning | PHI | 8 hr |
| Dec 28, 3:04 PM EST | Areal Flood Advisory | PHI | 4 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 | 11 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 40 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 8 |
| Flash Flood Watch | 8 |
| Flood Watch | 4 |
| Areal Flood Advisory | 36 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 3 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Advisory | 11 |
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.