Alert archive / Maryland / Charles County
Weather alerts in Charles County, Maryland, 2010
194 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Charles County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 194
- Warnings
- 46
- Watches
- 44
- Advisories
- 40
- Busiest month
- June25 alerts
- Busiest day
- October 27, 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 5 tornado warnings covering Charles County in 2010 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Charles County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 25 | 22 | 12% | 33 | 88% | 24 min |
| Flash flood warnings | 4 | 3 | 25% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 31 | 2 | 94% | 4 | 50% | 17 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 257 | 198 | 23% | 762 | 86% | 21 min |
| NWS Baltimore/Washington: flash flood warnings | 64 | 35 | 45% | 139 | 92% | 166 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, 4:21 AM EST | Wind Advisory | LWX | 38 hr |
| Jan 7, 3:48 AM EST | Winter Weather Advisory | LWX | 57 hr |
| Jan 23, 1:08 PM EST | Flash Flood Watch | LWX | 48 hr |
| Jan 24, 10:03 AM EST | Coastal Flood Advisory | LWX | 19 hr |
| Jan 24, 6:02 PM EST | Coastal Flood Warning | LWX | 21 hr |
| Jan 24, 6:06 PM EST | Wind Advisory | LWX | 19 hr |
| Jan 25, 3:19 PM EST | Coastal Flood Advisory | LWX | 14 hr |
| Jan 29, 11:00 AM EST | Winter Weather Advisory | LWX | 38 hr |
| Jan 29, 6:05 PM EST | Winter Storm Warning | LWX | 33 hr |
| Jan 30, 8:10 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 30, 11:03 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 2, 3:07 AM EST | Winter Weather Advisory | LWX | 26 hr |
| Feb 3, 2:45 PM EST | Winter Storm Watch | LWX | 19 hr |
| Feb 4, 9:59 AM EST | Winter Storm Warning | LWX | 55 hr |
| Feb 5, 11:45 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 5, 1:09 PM EST | Coastal Flood Advisory | LWX | 32 hr |
| Feb 5, 3:06 PM EST | Blizzard Warning | LWX | 26 hr |
| Feb 5, 6:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 12:03 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 7, 3:15 PM EST | Winter Storm Watch | LWX | 35 hr |
| Feb 8, 3:04 PM EST | Winter Storm Warning | LWX | 46 hr |
| Feb 9, 7:04 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 3:45 AM EST | Blizzard Warning | LWX | 23 hr |
| Feb 23, 5:31 AM EST | Winter Storm Watch | LWX | 55 hr |
| Feb 24, 1:48 PM EST | Winter Weather Advisory | LWX | 15 hr |
| Feb 25, 9:35 AM EST | High Wind Watch | LWX | 6 hr |
| Feb 25, 3:41 PM EST | High Wind Warning | LWX | 26 hr |
| Feb 25, 3:41 PM EST | Wind Advisory | LWX | 24 hr |
| Mar 10, 5:46 AM EST | Flood Watch | LWX | 3 days |
| Mar 12, 11:02 AM EST | Coastal Flood Watch | LWX | 17 hr |
| Mar 12, 5:54 PM EST | Coastal Flood Advisory | LWX | 10 hr |
| Mar 13, 4:09 AM EST | Coastal Flood Warning | LWX | 4 days |
| Mar 15, 4:15 AM EDT | Coastal Flood Advisory | LWX | 31 hr |
| Mar 16, 7:00 PM EDT | Coastal Flood Advisory | LWX | 41 hr |
| Mar 22, 2:48 PM EDT | Severe Thunderstorm Warning | LWX | 27 min |
| Mar 28, 9:13 AM EDT | Coastal Flood Advisory | LWX | 42 hr |
| Apr 8, 6:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Apr 8, 7:45 PM EDT | Severe Thunderstorm Warning | LWX | 29 min |
| Apr 8, 8:12 PM EDT | Severe Thunderstorm Warning | LWX | 31 min |
| Apr 16, 6:16 PM EDT | Special Weather Statement | LWX | 74 min |
| Apr 16, 6:20 PM EDT | Special Weather Statement | LWX | 70 min |
| Apr 16, 7:21 PM EDT | Special Weather Statement | LWX | 84 min |
| Apr 17, 9:31 AM EDT | Red Flag Warning | LWX | 11 hr |
| Apr 22, 12:37 AM EDT | Dense Fog Advisory | LWX | 8 hr |
| Apr 25, 2:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| 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 26, 4:33 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Apr 26, 5:19 PM EDT | Special Weather Statement | LWX | 26 min |
| Apr 26, 5:40 PM EDT | Tornado Warning | LWX | 35 min |
| Apr 26, 6:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 2, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 12, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 14, 2:29 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 14, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | 54 min |
| May 14, 7:24 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 14, 7:34 PM EDT | Tornado Warning | LWX | 26 min |
| May 27, 3:20 AM EDT | Flash Flood Watch | LWX | 24 hr |
| 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, 2:31 PM EDT | Coastal Flood Advisory | LWX | 21 hr |
| 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, 3:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 3, 4:42 PM EDT | Severe Thunderstorm Warning | LWX | 63 min |
| Jun 3, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | 45 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, 7:03 PM EDT | Mesoscale Discussion | SPC | 57 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, 3:58 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Jun 12, 2:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 12, 3:10 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 12, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 12, 5:37 PM EDT | Special Weather Statement | LWX | 23 min |
| Jun 22, 11:35 AM EDT | Mesoscale Discussion | SPC | 25 min |
| Jun 22, 7:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 22, 7:52 PM EDT | Severe Thunderstorm Warning | LWX | 53 min |
| Jun 22, 8:23 PM EDT | Severe Thunderstorm Warning | LWX | 37 min |
| Jun 24, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 28, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:12 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 1:50 PM EDT | Heat Advisory | LWX | 54 hr |
| Jul 5, 7:38 PM EDT | Excessive Heat Watch | LWX | 9 hr |
| Jul 13, 2:21 PM EDT | Flash Flood Watch | LWX | 13 hr |
| Jul 13, 6:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 13, 8:05 PM EDT | Special Weather Statement | LWX | 40 min |
| Jul 13, 11:22 PM EDT | Special Weather Statement | LWX | 53 min |
| Jul 14, 12:15 AM EDT | Special Weather Statement | LWX | 60 min |
| Jul 14, 1:11 AM EDT | Special Weather Statement | LWX | 49 min |
| Jul 16, 3:10 AM EDT | Heat Advisory | LWX | 15 hr |
| Jul 16, 7:02 PM EDT | Special Weather Statement | LWX | 58 min |
| Jul 19, 9:52 PM EDT | Special Weather Statement | LWX | 38 min |
| Jul 22, 2:06 PM EDT | Excessive Heat Watch | LWX | 31 hr |
| Jul 22, 2:06 PM EDT | Heat Advisory | LWX | 31 hr |
| Jul 23, 9:14 PM EDT | Excessive Heat Warning | LWX | 24 hr |
| Jul 23, 9:14 PM EDT | Heat Advisory | LWX | 47 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, 3:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 25, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 25, 3:42 PM EDT | Severe Thunderstorm Warning | LWX | 63 min |
| Jul 25, 4:17 PM EDT | Severe Thunderstorm Warning | LWX | 58 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, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 4, 3:07 PM EDT | Heat Advisory | LWX | 29 hr |
| Aug 4, 5:30 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Aug 4, 5:52 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 4, 7:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 4, 7:56 PM EDT | Severe Thunderstorm Warning | LWX | 64 min |
| 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, 3:45 PM EDT | Severe Thunderstorm Warning | LWX | 60 min |
| Aug 5, 3:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 5, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | 53 min |
| Aug 5, 6:19 PM EDT | Special Weather Statement | LWX | 26 min |
| Aug 5, 6:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 12, 7:40 AM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Aug 12, 8:12 AM EDT | Severe Thunderstorm Warning | LWX | 63 min |
| Aug 12, 9:19 AM EDT | Flash Flood Warning | LWX | 86 min |
| Aug 12, 1:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 12, 2:51 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 12, 4:15 PM EDT | Severe Thunderstorm Warning | LWX | 60 min |
| Aug 12, 7:10 PM EDT | Coastal Flood Advisory | LWX | 3 days |
| Aug 16, 2:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 16, 2:13 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 17, 2:58 PM EDT | Flood Watch | LWX | 29 hr |
| Aug 24, 2:50 PM EDT | Coastal Flood Advisory | LWX | 30 hr |
| Sep 1, 3:28 PM EDT | Coastal Flood Watch | LWX | 24 hr |
| Sep 2, 3:14 AM EDT | Coastal Flood Advisory | LWX | 24 hr |
| Sep 7, 2:39 PM EDT | Fire Weather Watch | LWX | 19 hr |
| Sep 7, 9:44 PM EDT | Coastal Flood Advisory | LWX | 13 hr |
| Sep 22, 10:54 AM EDT | Coastal Flood Advisory | LWX | 10 hr |
| Sep 22, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Sep 22, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 27, 3:43 AM EDT | Flash Flood Watch | LWX | 28 hr |
| Sep 27, 10:41 AM EDT | Coastal Flood Advisory | LWX | 39 hr |
| Sep 29, 2:21 AM EDT | Flash Flood Watch | LWX | 50 hr |
| Sep 29, 2:41 AM EDT | Coastal Flood Watch | LWX | 18 hr |
| Sep 29, 8:48 PM EDT | Coastal Flood Advisory | LWX | 25 hr |
| Sep 30, 4:55 AM EDT | Tornado Watch | SPC | 8 hr |
| Sep 30, 4:57 AM EDT | Flash Flood Warning | LWX | 6 hr |
| Sep 30, 8:09 AM EDT | Coastal Flood Warning | LWX | 21 hr |
| Sep 30, 8:25 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Sep 30, 10:38 AM EDT | Flash Flood Warning | LWX | 6 hr |
| Sep 30, 10:49 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 30, 12:39 PM EDT | Tornado Watch | SPC | 6 hr |
| Sep 30, 6:13 PM EDT | Flash Flood Warning | LWX | 6 hr |
| Oct 1, 3:08 AM EDT | Coastal Flood Advisory | LWX | 8 hr |
| Oct 26, 7:19 PM EDT | Tornado Watch | SPC | 12 hr |
| 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, 12:57 PM EDT | Special Weather Statement | LWX | 63 min |
| Oct 27, 1:25 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Oct 27, 2:38 PM EDT | Special Weather Statement | LWX | 52 min |
| Oct 27, 3:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Oct 27, 4:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Oct 27, 5:21 PM EDT | Tornado Warning | LWX | 39 min |
| Oct 27, 5:43 PM EDT | Special Weather Statement | LWX | 47 min |
| Oct 27, 7:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Oct 27, 7:36 PM EDT | Tornado Warning | LWX | 42 min |
| Oct 27, 7:46 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 27, 9:56 PM EDT | Dense Fog Advisory | LWX | 7 hr |
| Nov 1, 4:02 AM EDT | Freeze Watch | LWX | 10 hr |
| Nov 1, 1:57 PM EDT | Frost Advisory | LWX | 19 hr |
| Nov 2, 2:18 PM EDT | Frost Advisory | LWX | 19 hr |
| Nov 12, 2:21 AM EST | Coastal Flood Advisory | LWX | 56 hr |
| Nov 16, 11:27 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 17, 12:03 AM EST | Severe Thunderstorm Warning | LWX | 42 min |
| Nov 17, 12:06 AM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Nov 17, 12:43 AM EST | Severe Thunderstorm Warning | LWX | 47 min |
| Nov 17, 1:04 AM EST | Severe Thunderstorm Warning | LWX | 86 min |
| Nov 22, 2:08 AM EST | Dense Fog Advisory | LWX | 8 hr |
| Nov 30, 3:12 AM EST | Wind Advisory | LWX | 32 hr |
| Nov 30, 9:59 AM EST | Coastal Flood Watch | LWX | 8 hr |
| Dec 1, 3:48 AM EST | Tornado Watch | SPC | 7 hr |
| Dec 1, 6:37 AM EST | Severe Thunderstorm Warning | LWX | 53 min |
| Dec 1, 7:51 AM EST | Mesoscale Discussion | SPC | 84 min |
| Dec 1, 9:28 AM EST | Tornado Warning | LWX | 17 min |
| Dec 13, 2:09 AM EST | Winter Weather Advisory | LWX | 7 hr |
| Dec 13, 10:28 AM EST | Wind Advisory | LWX | 36 hr |
| Dec 15, 2:21 PM EST | Winter Weather Advisory | LWX | 29 hr |
| Dec 25, 3:09 AM EST | Winter Storm Watch | LWX | 13 hr |
| Dec 25, 3:42 PM EST | Winter Storm Warning | LWX | 31 hr |
| Dec 25, 3:42 PM EST | Winter Weather Advisory | LWX | 48 hr |
| Dec 26, 2:42 PM EST | Wind Advisory | LWX | 30 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 | 25 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 17 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 49 |
| Special Weather Statement | 15 |
| Flooding | |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 5 |
| Flood Watch | 2 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 7 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| 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 | 3 |
| Coast and beach | |
| Coastal Flood Warning | 3 |
| Coastal Flood Watch | 4 |
| Coastal Flood Advisory | 17 |
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.