Alert archive / Maryland / Carroll County
Weather alerts in Carroll County, Maryland, 2013
140 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Carroll County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 140
- Warnings
- 33
- Watches
- 34
- Advisories
- 27
- Busiest month
- June38 alerts
- Busiest day
- June 10, 20138 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 Carroll County in 2013 had a tornado report inside them.
Carroll County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 13 | 9 | 31% | 22 | 77% | 24 min |
| Flash flood warnings | 5 | 3 | 40% | 1 | 100% | 149 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 22 | 9 | 59% | 21 | 62% | 11 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 210 | 141 | 33% | 495 | 74% | 21 min |
| NWS Baltimore/Washington: flash flood warnings | 81 | 51 | 37% | 124 | 78% | 74 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 11, 4:39 PM EST | Dense Fog Advisory | LWX | 19 hr |
| Jan 12, 7:27 PM EST | Dense Fog Advisory | LWX | 18 hr |
| Jan 13, 4:27 PM EST | Dense Fog Advisory | LWX | 13 hr |
| Jan 15, 1:13 PM EST | Winter Weather Advisory | LWX | 22 hr |
| Jan 23, 3:58 PM EST | Winter Weather Advisory | LWX | 19 hr |
| Jan 24, 7:52 PM EST | Winter Weather Advisory | LWX | 46 hr |
| Jan 27, 4:02 AM EST | Winter Weather Advisory | LWX | 32 hr |
| Jan 29, 2:54 PM EST | Wind Advisory | LWX | 47 hr |
| Jan 30, 4:07 AM EST | Flash Flood Watch | LWX | 21 hr |
| Jan 30, 12:54 PM EST | Mesoscale Discussion | SPC | 96 min |
| Jan 30, 2:15 PM EST | Special Weather Statement | LWX | 45 min |
| Jan 30, 2:50 PM EST | Special Weather Statement | LWX | 40 min |
| Jan 30, 6:26 PM EST | Flash Flood Warning | LWX | 6 hr |
| Jan 30, 6:31 PM EST | Tornado Watch | SPC | 8 hr |
| Jan 30, 9:38 PM EST | Mesoscale Discussion | SPC | 67 min |
| Jan 30, 9:39 PM EST | Areal Flood Warning | LWX | 6 hr |
| Feb 7, 3:09 PM EST | Winter Weather Advisory | LWX | 19 hr |
| Feb 8, 1:26 PM EST | Wind Advisory | LWX | 17 hr |
| Feb 22, 3:27 AM EST | Winter Weather Advisory | LWX | 30 hr |
| Feb 25, 2:30 PM EST | Flood Watch | LWX | 25 hr |
| Mar 4, 3:11 AM EST | Winter Storm Watch | LWX | 36 hr |
| Mar 4, 8:48 PM EST | Winter Storm Warning | LWX | 42 hr |
| Mar 6, 3:25 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 6, 2:29 PM EST | Winter Weather Advisory | LWX | 105 min |
| Mar 12, 2:31 PM EDT | Areal Flood Warning | LWX | 4 hr |
| Mar 17, 3:27 PM EDT | Winter Weather Advisory | LWX | 17 hr |
| Mar 24, 4:26 AM EDT | Winter Weather Advisory | LWX | 38 hr |
| Mar 25, 5:31 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 2, 3:32 PM EDT | Fire Weather Watch | LWX | 13 hr |
| Apr 3, 4:30 AM EDT | Red Flag Warning | LWX | 16 hr |
| Apr 10, 11:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Apr 12, 6:36 PM EDT | Special Weather Statement | LWX | 24 min |
| Apr 12, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Apr 12, 7:04 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Apr 19, 1:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 19, 2:31 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 19, 4:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 19, 6:43 PM EDT | Special Weather Statement | LWX | 32 min |
| Apr 20, 10:28 PM EDT | Freeze Warning | LWX | 10 hr |
| Apr 21, 2:46 PM EDT | Frost Advisory | LWX | 18 hr |
| Apr 24, 3:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 24, 6:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 8, 11:27 PM EDT | Dense Fog Advisory | LWX | 9 hr |
| May 11, 1:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 12, 1:53 PM EDT | Freeze Watch | LWX | 25 hr |
| May 13, 3:15 PM EDT | Frost Advisory | LWX | 17 hr |
| May 22, 3:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 23, 3:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 23, 7:09 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 2, 3:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 2:18 PM EDT | Flash Flood Watch | LWX | 30 hr |
| Jun 9, 9:09 PM EDT | Flash Flood Watch | LWX | 26 hr |
| Jun 10, 2:41 AM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 10, 12:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 2:02 PM EDT | Tornado Watch | SPC | 10 hr |
| Jun 10, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 10, 6:56 PM EDT | Tornado Warning | LWX | 34 min |
| Jun 10, 7:13 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 10, 7:24 PM EDT | Tornado Warning | LWX | 36 min |
| Jun 12, 1:50 PM EDT | Flash Flood Watch | LWX | 30 hr |
| Jun 13, 2:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 3:58 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 5:27 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 7:26 AM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Jun 13, 8:07 AM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jun 13, 8:10 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 13, 8:31 AM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 24, 1:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 24, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 24, 4:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 25, 5:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 25, 6:20 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 8:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 25, 9:20 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jun 25, 9:55 PM EDT | Severe Thunderstorm Warning | LWX | 65 min |
| Jun 26, 1:19 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 2:55 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 26, 4:50 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jun 27, 1:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 27, 1:58 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 28, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 28, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:09 PM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Jun 28, 3:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 4:11 AM EDT | Flash Flood Watch | LWX | 40 hr |
| Jun 30, 11:48 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 4:12 AM EDT | Flash Flood Watch | LWX | 13 hr |
| Jul 7, 1:16 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 7, 3:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 7, 5:04 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Jul 12, 3:46 AM EDT | Flash Flood Watch | LWX | 14 hr |
| Jul 18, 7:41 PM EDT | Heat Advisory | LWX | 22 hr |
| Jul 19, 6:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 1:07 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 22, 1:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 27, 5:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 28, 10:31 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Aug 7, 9:03 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Aug 13, 1:36 AM EDT | Flash Flood Watch | LWX | 10 hr |
| Aug 20, 2:49 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| Aug 22, 2:26 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 12, 1:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Sep 12, 2:50 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 12, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Oct 7, 8:10 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 7, 8:56 AM EDT | Tornado Watch | SPC | 8 hr |
| Oct 11, 6:42 AM EDT | Flood Watch | LWX | 23 hr |
| Oct 11, 10:06 AM EDT | Areal Flood Warning | LWX | 20 hr |
| Oct 20, 1:13 PM EDT | Frost Advisory | LWX | 19 hr |
| Oct 23, 1:28 PM EDT | Freeze Watch | LWX | 24 hr |
| Oct 24, 1:34 PM EDT | Freeze Warning | LWX | 19 hr |
| Oct 25, 11:40 AM EDT | Freeze Warning | LWX | 21 hr |
| Nov 1, 3:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Nov 1, 4:17 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Nov 1, 5:41 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Nov 1, 7:39 AM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Nov 10, 12:27 PM EST | Red Flag Warning | LWX | 5 hr |
| Nov 17, 1:11 AM EST | Dense Fog Advisory | LWX | 8 hr |
| Nov 18, 2:31 AM EST | Mesoscale Discussion | SPC | 89 min |
| Nov 23, 11:05 AM EST | Fire Weather Watch | LWX | 17 hr |
| Nov 24, 3:23 AM EST | Red Flag Warning | LWX | 15 hr |
| Nov 25, 9:58 AM EST | Winter Weather Advisory | LWX | 62 hr |
| Nov 27, 3:06 AM EST | Flood Watch | LWX | 2 hr |
| Dec 5, 9:45 AM EST | Dense Fog Advisory | LWX | 2 hr |
| Dec 6, 12:07 PM EST | Winter Storm Watch | LWX | 32 hr |
| Dec 7, 8:34 PM EST | Winter Storm Warning | LWX | 36 hr |
| Dec 8, 11:05 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 8, 2:30 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 9, 10:09 AM EST | Winter Storm Watch | LWX | 4 hr |
| Dec 9, 2:29 PM EST | Winter Weather Advisory | LWX | 21 hr |
| Dec 9, 5:22 PM EST | Dense Fog Advisory | LWX | 10 hr |
| Dec 9, 8:54 PM EST | Winter Storm Warning | LWX | 15 hr |
| Dec 10, 4:37 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 13, 4:21 AM EST | Winter Storm Watch | LWX | 10 hr |
| Dec 13, 2:33 PM EST | Winter Storm Warning | LWX | 34 hr |
| Dec 13, 2:33 PM EST | Winter Weather Advisory | LWX | 34 hr |
| Dec 17, 1:42 PM EST | Winter Weather Advisory | LWX | 3 hr |
| Dec 22, 3:37 AM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Dec 22, 6:14 AM EST | Mesoscale Discussion | SPC | 61 min |
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 | 13 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 42 |
| Special Weather Statement | 4 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 5 |
| Flash Flood Watch | 8 |
| Flood Watch | 3 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.