Alert archive / Maryland / Caroline County
Weather alerts in Caroline County, Maryland, 2010
215 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 215
- Warnings
- 57
- Watches
- 28
- Advisories
- 40
- Busiest month
- June37 alerts
- Busiest day
- September 30, 201013 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Caroline County in 2010 had a tornado report inside them.
Caroline County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 32 | 16 | 50% | 5 | 100% | 27 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 12 | 1 | 92% | 4 | 25% | 1 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 183 | 107 | 42% | 252 | 82% | 29 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 14 | 2 | 86% | 15 | 60% | 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 2, 10:45 AM EST | Wind Advisory | PHI | 32 hr |
| Jan 7, 3:31 PM EST | Winter Weather Advisory | PHI | 17 hr |
| Jan 24, 11:17 AM EST | Coastal Flood Advisory | PHI | 29 hr |
| Jan 24, 3:13 PM EST | Wind Advisory | PHI | 22 hr |
| Jan 25, 11:19 AM EST | Areal Flood Advisory | PHI | 29 days |
| Jan 29, 3:00 PM EST | Winter Weather Advisory | PHI | 13 hr |
| Jan 30, 4:16 AM EST | Winter Storm Warning | PHI | 23 hr |
| Jan 30, 11:03 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 2, 11:07 AM EST | Winter Weather Advisory | PHI | 20 hr |
| Feb 4, 3:23 AM EST | Winter Storm Watch | PHI | 10 hr |
| Feb 4, 1:43 PM EST | Blizzard Warning | PHI | 51 hr |
| Feb 4, 1:43 PM EST | Winter Storm Warning | PHI | 51 hr |
| Feb 5, 11:45 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 5, 6:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 5, 11:53 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 6:53 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 12:03 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 4:17 PM EST | Winter Storm Warning | PHI | 3 hr |
| Feb 8, 3:45 AM EST | Winter Storm Watch | PHI | 24 hr |
| Feb 8, 3:51 PM EST | Winter Storm Warning | PHI | 54 hr |
| Feb 9, 7:04 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 4:33 AM EST | Blizzard Warning | PHI | 19 hr |
| Feb 10, 7:27 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 10, 12:20 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 23, 3:30 PM EST | Winter Storm Watch | PHI | 24 hr |
| Feb 24, 3:16 PM EST | Winter Storm Warning | PHI | 48 hr |
| Feb 25, 11:17 AM EST | Wind Advisory | PHI | 24 hr |
| Feb 26, 4:34 AM EST | Winter Weather Advisory | PHI | 11 hr |
| Mar 11, 3:42 PM EST | Flood Watch | PHI | 59 hr |
| Mar 12, 3:23 PM EST | Coastal Flood Advisory | PHI | 41 hr |
| Mar 13, 10:06 AM EST | Areal Flood Advisory | PHI | 8 hr |
| Mar 13, 11:10 PM EST | Coastal Flood Advisory | PHI | 3 days |
| Mar 28, 4:13 AM EDT | Coastal Flood Advisory | PHI | 68 hr |
| Mar 29, 3:43 AM EDT | Areal Flood Warning | PHI | 25 hr |
| Apr 10, 10:50 AM EDT | Red Flag Warning | PHI | 8 hr |
| Apr 25, 4:37 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 25, 6:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 25, 8:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 27, 2:34 PM EDT | Fire Weather Watch | PHI | 14 hr |
| Apr 28, 4:12 AM EDT | Fire Weather Watch | PHI | 16 hr |
| Apr 28, 4:12 AM EDT | Red Flag Warning | PHI | 16 hr |
| Apr 28, 7:55 PM EDT | Red Flag Warning | PHI | 24 hr |
| May 8, 4:15 AM EDT | Wind Advisory | PHI | 25 hr |
| May 8, 2:02 PM EDT | Red Flag Warning | PHI | 6 hr |
| May 8, 7:59 PM EDT | Fire Weather Watch | PHI | 8 hr |
| May 9, 4:02 AM EDT | Red Flag Warning | PHI | 16 hr |
| May 9, 3:57 PM EDT | Fire Weather Watch | PHI | 12 hr |
| May 10, 4:17 AM EDT | Red Flag Warning | PHI | 16 hr |
| May 10, 2:32 PM EDT | Frost Advisory | PHI | 17 hr |
| May 14, 3:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 14, 8:04 PM EDT | Severe Thunderstorm Warning | PHI | 56 min |
| May 14, 8:49 PM EDT | Severe Thunderstorm Warning | PHI | 56 min |
| May 14, 9:45 PM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| May 23, 5:12 AM EDT | Special Weather Statement | PHI | 2 hr |
| May 27, 11:28 AM EDT | Mesoscale Discussion | SPC | 92 min |
| May 27, 1:23 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 27, 4:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 27, 8:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 28, 12:38 AM EDT | Special Weather Statement | PHI | 52 min |
| May 28, 1:11 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 1, 3:10 PM EDT | Severe Thunderstorm Warning | PHI | 50 min |
| Jun 1, 4:02 PM EDT | Special Weather Statement | PHI | 58 min |
| Jun 3, 11:27 AM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 3, 1:32 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 3, 2:58 PM EDT | Special Weather Statement | PHI | 62 min |
| Jun 3, 3:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 3, 4:31 PM EDT | Special Weather Statement | PHI | 59 min |
| Jun 3, 5:23 PM EDT | Special Weather Statement | PHI | 52 min |
| Jun 3, 5:34 PM EDT | Severe Thunderstorm Warning | PHI | 56 min |
| Jun 3, 6:17 PM EDT | Severe Thunderstorm Warning | PHI | 88 min |
| Jun 3, 6:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 4, 2:39 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 4, 4:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 4, 7:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 5, 9:17 PM EDT | Special Weather Statement | PHI | 58 min |
| Jun 6, 11:42 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 6, 12:40 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 6, 2:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 6, 2:49 PM EDT | Severe Thunderstorm Warning | PHI | 47 min |
| Jun 12, 7:08 PM EDT | Special Weather Statement | PHI | 82 min |
| Jun 13, 3:44 PM EDT | Special Weather Statement | PHI | 91 min |
| Jun 22, 8:00 PM EDT | Severe Thunderstorm Warning | PHI | 30 min |
| Jun 22, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | 46 min |
| Jun 22, 9:12 PM EDT | Severe Thunderstorm Warning | PHI | 18 min |
| Jun 22, 9:33 PM EDT | Severe Thunderstorm Warning | PHI | 27 min |
| Jun 22, 9:39 PM EDT | Special Weather Statement | PHI | 66 min |
| Jun 22, 9:46 PM EDT | Severe Thunderstorm Warning | PHI | 59 min |
| Jun 24, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 5:02 PM EDT | Special Weather Statement | PHI | 58 min |
| Jun 24, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | 87 min |
| Jun 28, 4:33 AM EDT | Heat Advisory | PHI | 12 hr |
| Jun 28, 1:12 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 2:40 PM EDT | Special Weather Statement | PHI | 95 min |
| Jun 28, 3:07 PM EDT | Special Weather Statement | PHI | 83 min |
| Jun 28, 3:10 PM EDT | Severe Thunderstorm Warning | PHI | 65 min |
| Jun 28, 3:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | 64 min |
| Jul 6, 3:23 AM EDT | Heat Advisory | PHI | 17 hr |
| Jul 6, 4:04 PM EDT | Heat Advisory | PHI | 26 hr |
| Jul 7, 12:55 PM EDT | Red Flag Warning | PHI | 9 hr |
| Jul 10, 9:00 AM EDT | Areal Flood Advisory | PHI | 6 hr |
| Jul 10, 9:35 PM EDT | Special Weather Statement | PHI | 55 min |
| Jul 10, 10:20 PM EDT | Areal Flood Advisory | PHI | 115 min |
| Jul 13, 3:51 AM EDT | Areal Flood Advisory | PHI | 114 min |
| Jul 13, 5:39 AM EDT | Special Weather Statement | PHI | 66 min |
| Jul 13, 5:48 AM EDT | Areal Flood Advisory | PHI | 76 min |
| Jul 13, 6:30 AM EDT | Tornado Warning | PHI | 45 min |
| Jul 13, 6:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 13, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | 64 min |
| Jul 14, 2:58 AM EDT | Special Weather Statement | PHI | 62 min |
| Jul 17, 1:24 AM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Jul 18, 11:12 PM EDT | Special Weather Statement | PHI | 93 min |
| Jul 19, 12:00 AM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| Jul 19, 8:23 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| Jul 23, 1:09 PM EDT | Heat Advisory | PHI | 2 hr |
| Jul 23, 3:24 PM EDT | Heat Advisory | PHI | 51 hr |
| Jul 25, 1:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 25, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 3:22 PM EDT | Severe Thunderstorm Warning | PHI | 53 min |
| Jul 25, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 25, 4:11 PM EDT | Severe Thunderstorm Warning | PHI | 94 min |
| Jul 29, 11:36 AM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 29, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 29, 1:25 PM EDT | Special Weather Statement | PHI | 95 min |
| Jul 29, 1:50 PM EDT | Severe Thunderstorm Warning | PHI | 85 min |
| Jul 29, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | 41 min |
| Jul 29, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 29, 8:47 PM EDT | Special Weather Statement | PHI | 58 min |
| Jul 29, 9:42 PM EDT | Special Weather Statement | PHI | 63 min |
| Aug 4, 6:17 AM EDT | Special Weather Statement | PHI | 58 min |
| Aug 4, 2:56 PM EDT | Heat Advisory | PHI | 29 hr |
| Aug 4, 8:36 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 5, 12:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 5, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 3:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 5, 4:17 PM EDT | Severe Thunderstorm Warning | PHI | 58 min |
| Aug 5, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | 60 min |
| Aug 5, 6:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 12, 7:01 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 12, 7:13 AM EDT | Special Weather Statement | PHI | 62 min |
| Aug 12, 7:56 AM EDT | Special Weather Statement | PHI | 2 hr |
| Aug 12, 9:29 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 16, 2:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 18, 11:10 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 22, 5:06 PM EDT | Special Weather Statement | PHI | 54 min |
| Aug 24, 9:47 PM EDT | Coastal Flood Advisory | PHI | 10 hr |
| Sep 4, 4:19 AM EDT | Red Flag Warning | PHI | 13 hr |
| Sep 14, 11:00 AM EDT | Red Flag Warning | PHI | 7 hr |
| Sep 22, 3:43 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 22, 9:03 PM EDT | Special Weather Statement | PHI | 57 min |
| Sep 22, 10:49 PM EDT | Special Weather Statement | PHI | 56 min |
| Sep 27, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Sep 28, 7:02 AM EDT | Special Weather Statement | PHI | 58 min |
| Sep 28, 8:00 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 28, 9:13 AM EDT | Tornado Warning | PHI | 32 min |
| Sep 28, 10:41 AM EDT | Special Weather Statement | PHI | 64 min |
| Sep 29, 3:52 AM EDT | Flood Watch | PHI | 49 hr |
| Sep 29, 3:19 PM EDT | Coastal Flood Advisory | PHI | 30 hr |
| Sep 29, 3:24 PM EDT | Wind Advisory | PHI | 38 hr |
| Sep 30, 4:02 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 30, 4:55 AM EDT | Tornado Watch | SPC | 8 hr |
| Sep 30, 6:06 AM EDT | Areal Flood Warning | PHI | 4 hr |
| Sep 30, 8:25 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Sep 30, 10:49 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 30, 12:39 PM EDT | Tornado Watch | SPC | 6 hr |
| Sep 30, 1:48 PM EDT | Areal Flood Warning | PHI | 6 hr |
| Sep 30, 3:15 PM EDT | Special Weather Statement | PHI | 45 min |
| Sep 30, 3:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 30, 3:47 PM EDT | Special Weather Statement | PHI | 58 min |
| Sep 30, 6:23 PM EDT | Special Weather Statement | PHI | 37 min |
| Sep 30, 7:49 PM EDT | Coastal Flood Warning | PHI | 6 hr |
| Sep 30, 7:50 PM EDT | Areal Flood Warning | PHI | 16 hr |
| Oct 1, 12:01 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Oct 1, 12:40 AM EDT | Special Weather Statement | PHI | 65 min |
| Oct 11, 10:16 PM EDT | Special Weather Statement | PHI | 59 min |
| Oct 11, 10:20 PM EDT | Severe Thunderstorm Warning | PHI | 55 min |
| Oct 11, 11:17 PM EDT | Special Weather Statement | PHI | 58 min |
| Oct 27, 5:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 27, 11:54 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Oct 27, 12:13 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 27, 1:02 PM EDT | Special Weather Statement | PHI | 58 min |
| Oct 27, 2:01 PM EDT | Special Weather Statement | PHI | 59 min |
| Oct 27, 2:37 PM EDT | Special Weather Statement | PHI | 53 min |
| Oct 27, 3:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Oct 27, 3:31 PM EDT | Severe Thunderstorm Warning | PHI | 59 min |
| Oct 27, 4:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Oct 27, 9:06 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Nov 1, 3:58 AM EDT | Freeze Watch | PHI | 11 hr |
| Nov 1, 3:10 PM EDT | Freeze Warning | PHI | 17 hr |
| Nov 12, 4:31 AM EST | Coastal Flood Advisory | PHI | 11 hr |
| Nov 12, 12:09 PM EST | Coastal Flood Advisory | PHI | 13 hr |
| Nov 14, 11:02 PM EST | Dense Fog Advisory | PHI | 11 hr |
| Nov 15, 3:16 PM EST | Dense Fog Advisory | PHI | 12 hr |
| Nov 16, 3:27 PM EST | Wind Advisory | PHI | 27 hr |
| Nov 17, 12:06 AM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Nov 17, 1:08 AM EST | Severe Thunderstorm Warning | PHI | 52 min |
| Nov 17, 1:59 AM EST | Special Weather Statement | PHI | 61 min |
| Nov 17, 2:03 AM EST | Severe Thunderstorm Warning | PHI | 57 min |
| Nov 17, 11:19 AM EST | Coastal Flood Statement | PHI | 5 hr |
| Nov 22, 3:00 AM EST | Dense Fog Advisory | PHI | 8 hr |
| Nov 30, 3:15 PM EST | Wind Advisory | PHI | 23 hr |
| Dec 1, 6:55 AM EST | Severe Thunderstorm Warning | PHI | 65 min |
| Dec 1, 7:12 AM EST | Special Weather Statement | PHI | 63 min |
| Dec 1, 7:51 AM EST | Mesoscale Discussion | SPC | 84 min |
| Dec 1, 8:08 AM EST | Special Weather Statement | PHI | 52 min |
| Dec 1, 8:36 AM EST | Special Weather Statement | PHI | 54 min |
| Dec 1, 9:31 AM EST | Special Weather Statement | PHI | 59 min |
| Dec 1, 10:17 AM EST | Special Weather Statement | PHI | 43 min |
| Dec 1, 10:33 AM EST | Severe Thunderstorm Warning | PHI | 42 min |
| Dec 1, 10:49 AM EST | Special Weather Statement | PHI | 56 min |
| Dec 16, 3:45 AM EST | Winter Weather Advisory | PHI | 8 hr |
| Dec 16, 11:47 AM EST | Winter Weather Advisory | PHI | 7 hr |
| Dec 25, 4:16 AM EST | Winter Storm Watch | PHI | 11 hr |
| Dec 25, 3:24 PM EST | Winter Storm Warning | PHI | 38 hr |
| Dec 27, 4:14 AM EST | Wind Advisory | PHI | 17 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 | 32 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 13 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 45 |
| Special Weather Statement | 44 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flood Watch | 2 |
| Areal Flood Advisory | 8 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 6 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 9 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Advisory | 8 |
| Coastal Flood Statement | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.