Alert archive / Maryland / Carroll County
Weather alerts in Carroll County, Maryland, 2022
148 weather alerts in 2022, 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 2022. Tap one for its archive.
- Alerts
- 148
- Warnings
- 44
- Watches
- 28
- Advisories
- 36
- Busiest month
- July33 alerts
- Busiest day
- March 31, 20229 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 4 tornado warnings covering Carroll County in 2022 had a tornado report inside them.
Carroll County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 26 | 21 | 19% | 41 | 93% | 25 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 38 | 6 | 84% | 10 | 80% | 9 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 413 | 300 | 27% | 1,177 | 78% | 21 min |
| NWS Baltimore/Washington: flash flood warnings | 77 | 34 | 56% | 84 | 88% | 90 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 1, 5:40 AM EST | Dense Fog Advisory | LWX | 4 hr |
| Jan 1, 4:29 PM EST | Dense Fog Advisory | LWX | 5 hr |
| Jan 2, 4:28 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Jan 5, 2:33 PM EST | Winter Storm Warning | LWX | 38 hr |
| Jan 5, 2:33 PM EST | Winter Weather Advisory | LWX | 39 hr |
| Jan 7, 2:02 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 8, 3:54 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Jan 14, 3:33 AM EST | Winter Storm Watch | LWX | 33 hr |
| Jan 15, 12:30 PM EST | Winter Weather Advisory | LWX | 34 hr |
| Jan 16, 3:24 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 16, 8:33 PM EST | Wind Advisory | LWX | 22 hr |
| Jan 19, 1:09 PM EST | Winter Weather Advisory | LWX | 22 hr |
| Jan 28, 7:32 AM EST | Special Weather Statement | LWX | 58 min |
| Feb 2, 7:22 AM EST | Dense Fog Advisory | LWX | 3 hr |
| Feb 3, 3:39 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Feb 12, 10:00 AM EST | Winter Weather Advisory | LWX | 27 hr |
| Feb 14, 6:08 AM EST | Special Weather Statement | LWX | 37 min |
| Feb 14, 6:46 AM EST | Special Weather Statement | LWX | 44 min |
| Feb 17, 3:49 AM EST | High Wind Warning | LWX | 29 hr |
| Feb 17, 3:49 AM EST | Wind Advisory | LWX | 30 hr |
| Feb 18, 2:18 PM EST | Wind Advisory | LWX | 29 hr |
| Feb 24, 3:42 AM EST | Winter Weather Advisory | LWX | 29 hr |
| Feb 24, 9:13 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 6, 7:27 PM EST | Wind Advisory | LWX | 30 hr |
| Mar 7, 4:54 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 7, 7:24 PM EST | Severe Thunderstorm Warning | LWX | 51 min |
| Mar 11, 3:57 AM EST | Winter Storm Warning | LWX | 45 hr |
| Mar 11, 3:57 AM EST | Winter Weather Advisory | LWX | 35 hr |
| Mar 11, 3:26 PM EST | Wind Advisory | LWX | 34 hr |
| Mar 17, 11:16 PM EDT | Dense Fog Advisory | LWX | 4 min |
| Mar 17, 11:20 PM EDT | Dense Fog Advisory | LWX | 11 hr |
| Mar 25, 4:16 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Mar 28, 10:25 AM EDT | Special Weather Statement | LWX | 35 min |
| Mar 29, 1:52 PM EDT | Winter Weather Advisory | LWX | 21 hr |
| Mar 31, 1:41 PM EDT | Wind Advisory | LWX | 6 hr |
| Mar 31, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 31, 3:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 5:56 PM EDT | Severe Thunderstorm Warning | LWX | 26 min |
| Mar 31, 7:04 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Mar 31, 7:13 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Mar 31, 7:13 PM EDT | Tornado Warning | LWX | 12 min |
| Mar 31, 7:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Mar 31, 7:42 PM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Mar 31, 9:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Apr 9, 9:42 PM EDT | Frost Advisory | LWX | 35 hr |
| Apr 14, 2:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Apr 16, 9:48 AM EDT | Freeze Watch | LWX | 22 hr |
| Apr 17, 8:13 AM EDT | Freeze Warning | LWX | 23 hr |
| Apr 19, 3:10 AM EDT | Freeze Warning | LWX | 29 hr |
| Apr 26, 2:33 PM EDT | Freeze Watch | LWX | 21 hr |
| Apr 27, 11:15 AM EDT | Freeze Watch | LWX | 27 hr |
| Apr 27, 11:15 AM EDT | Freeze Warning | LWX | 21 hr |
| Apr 28, 2:23 PM EDT | Freeze Warning | LWX | 19 hr |
| Apr 29, 3:01 PM EDT | Frost Advisory | LWX | 18 hr |
| May 6, 3:13 AM EDT | Flood Watch | LWX | 33 hr |
| May 6, 4:14 PM EDT | Areal Flood Warning | LWX | 26 hr |
| May 7, 1:17 AM EDT | Areal Flood Warning | LWX | 8 hr |
| May 15, 3:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 20, 10:39 AM EDT | Mesoscale Discussion | SPC | 96 min |
| May 20, 11:35 AM EDT | Tornado Watch | SPC | 7 hr |
| May 20, 1:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| May 22, 12:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 22, 4:11 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| May 22, 4:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 22, 7:04 PM EDT | Severe Thunderstorm Warning | LWX | 56 min |
| May 27, 4:07 AM EDT | Flood Watch | LWX | 19 hr |
| May 27, 6:24 AM EDT | Tornado Watch | SPC | 8 hr |
| May 27, 10:59 AM EDT | Mesoscale Discussion | SPC | 91 min |
| May 27, 11:59 AM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| May 27, 12:24 PM EDT | Tornado Warning | LWX | 18 min |
| May 27, 12:29 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| May 27, 12:36 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 27, 1:15 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Jun 2, 1:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 2, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 8, 12:05 PM EDT | Flood Watch | LWX | 15 hr |
| Jun 8, 7:09 PM EDT | Severe Thunderstorm Warning | LWX | 26 min |
| Jun 8, 11:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 9, 1:39 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 16, 3:29 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 22, 3:05 AM EDT | Flood Watch | LWX | 20 hr |
| Jun 22, 12:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 22, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 2:56 PM EDT | Severe Thunderstorm Warning | LWX | 34 min |
| Jun 22, 3:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 22, 6:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 1, 11:59 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 1, 2:11 PM EDT | Severe Thunderstorm Warning | LWX | 23 min |
| Jul 1, 2:26 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Jul 1, 2:33 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jul 1, 2:57 PM EDT | Severe Thunderstorm Warning | LWX | 29 min |
| Jul 1, 3:12 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 1, 3:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 1:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 2, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 2, 4:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 6, 5:20 AM EDT | Flood Watch | LWX | 24 hr |
| Jul 8, 12:53 PM EDT | Flood Watch | LWX | 23 hr |
| Jul 12, 12:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 2:12 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 12, 3:48 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jul 12, 4:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 12, 4:20 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jul 12, 4:44 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jul 16, 1:36 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 2:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 18, 9:31 AM EDT | Flood Watch | LWX | 12 hr |
| Jul 18, 12:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 18, 1:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 3:06 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Jul 18, 3:38 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jul 18, 3:56 PM EDT | Tornado Warning | LWX | 22 min |
| Jul 18, 4:12 PM EDT | Tornado Warning | LWX | 14 min |
| Jul 18, 4:22 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 18, 4:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 23, 1:13 PM EDT | Heat Advisory | LWX | 31 hr |
| Jul 23, 7:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 25, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 25, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 3, 1:02 PM EDT | Heat Advisory | LWX | 31 hr |
| Aug 4, 5:19 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Aug 4, 5:24 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 5, 10:20 AM EDT | Flood Watch | LWX | 11 hr |
| Aug 9, 12:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 4:10 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 5, 9:06 PM EDT | Flood Watch | LWX | 12 hr |
| Sep 6, 5:37 AM EDT | Areal Flood Warning | LWX | 3 hr |
| Sep 12, 2:52 AM EDT | Flood Watch | LWX | 17 hr |
| Sep 12, 5:28 PM EDT | Areal Flood Warning | LWX | 5 hr |
| Sep 12, 5:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 25, 10:23 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 25, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 25, 1:53 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Oct 8, 9:12 AM EDT | Frost Advisory | LWX | 24 hr |
| Oct 18, 4:02 AM EDT | Freeze Warning | LWX | 29 hr |
| Oct 19, 1:32 PM EDT | Freeze Warning | LWX | 19 hr |
| Oct 20, 1:59 PM EDT | Frost Advisory | LWX | 19 hr |
| Oct 25, 4:42 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| Dec 7, 8:23 AM EST | Dense Fog Advisory | LWX | 3 hr |
| Dec 7, 10:40 PM EST | Dense Fog Advisory | LWX | 8 hr |
| Dec 14, 2:30 AM EST | Winter Weather Advisory | LWX | 37 hr |
| Dec 15, 3:27 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 21, 3:51 AM EST | Winter Weather Advisory | LWX | 36 hr |
| Dec 22, 12:37 PM EST | Wind Advisory | LWX | 29 hr |
| Dec 22, 2:55 PM EST | Wind Chill Advisory | LWX | 67 hr |
| Dec 23, 3:36 AM EST | Areal Flood Warning | LWX | 5 hr |
| Dec 31, 5:56 AM EST | Dense Fog Advisory | LWX | 16 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 | 26 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 36 |
| Special Weather Statement | 4 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flood Watch | 10 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.