Alert archive / Maryland / Somerset County
Weather alerts in Somerset County, Maryland, 2017
132 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Somerset County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 132
- Warnings
- 10
- Watches
- 10
- Advisories
- 46
- Busiest month
- July28 alerts
- Busiest day
- August 7, 20178 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Somerset County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 1 | 80% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: tornado warnings | 35 | 8 | 77% | 25 | 68% | 14 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 183 | 103 | 44% | 289 | 79% | 19 min |
| NWS Wakefield, VA: flash flood warnings | 7 | 5 | 29% | 5 | 100% | 46 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 5, 10:20 AM EST | Winter Storm Watch | AKQ | 17 hr |
| Jan 6, 3:45 AM EST | Winter Storm Warning | AKQ | 39 hr |
| Jan 6, 3:45 AM EST | Winter Weather Advisory | AKQ | 54 hr |
| Jan 7, 8:11 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 22, 3:09 PM EST | Wind Advisory | AKQ | 25 hr |
| Jan 23, 6:51 AM EST | Coastal Flood Advisory | AKQ | 29 hr |
| Feb 9, 8:56 AM EST | Special Weather Statement | AKQ | 34 min |
| Feb 9, 5:41 PM EST | Special Weather Statement | AKQ | 64 min |
| Feb 12, 4:08 AM EST | Wind Advisory | AKQ | 36 hr |
| Feb 25, 12:24 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 25, 1:30 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 25, 4:26 PM EST | Mesoscale Discussion | SPC | 94 min |
| Mar 1, 12:50 PM EST | Mesoscale Discussion | SPC | 55 min |
| Mar 1, 1:13 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 1, 2:50 PM EST | Mesoscale Discussion | SPC | 55 min |
| Mar 13, 3:27 PM EDT | Wind Advisory | AKQ | 22 hr |
| Mar 15, 2:42 AM EDT | Wind Advisory | AKQ | 15 hr |
| Mar 31, 5:59 AM EDT | Coastal Flood Statement | AKQ | 15 hr |
| Apr 6, 7:06 AM EDT | Tornado Watch | SPC | 8 hr |
| Apr 6, 9:10 AM EDT | Coastal Flood Advisory | AKQ | 6 hr |
| Apr 6, 12:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 6, 4:33 PM EDT | Coastal Flood Statement | AKQ | 6 hr |
| Apr 6, 10:07 PM EDT | Coastal Flood Advisory | AKQ | 5 hr |
| Apr 7, 3:16 AM EDT | Coastal Flood Advisory | AKQ | 8 hr |
| Apr 15, 10:01 PM EDT | Special Weather Statement | AKQ | 29 min |
| Apr 21, 9:19 PM EDT | Special Weather Statement | AKQ | 41 min |
| Apr 21, 10:01 PM EDT | Special Weather Statement | AKQ | 44 min |
| Apr 25, 4:29 AM EDT | Coastal Flood Statement | AKQ | 12 hr |
| Apr 25, 4:44 PM EDT | Coastal Flood Advisory | AKQ | 12 hr |
| Apr 26, 11:48 PM EDT | Coastal Flood Statement | AKQ | 7 hr |
| Apr 27, 12:02 AM EDT | Dense Fog Advisory | AKQ | 5 hr |
| May 5, 3:16 PM EDT | Coastal Flood Statement | AKQ | 13 hr |
| May 6, 6:08 PM EDT | Coastal Flood Statement | AKQ | 11 hr |
| May 7, 7:51 PM EDT | Special Weather Statement | AKQ | 39 min |
| May 11, 6:04 PM EDT | Coastal Flood Statement | AKQ | 24 hr |
| May 12, 5:54 PM EDT | Coastal Flood Advisory | AKQ | 14 hr |
| May 19, 7:29 PM EDT | Special Weather Statement | AKQ | 46 min |
| May 24, 5:32 AM EDT | Coastal Flood Advisory | AKQ | 34 hr |
| May 25, 12:59 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 25, 4:58 PM EDT | Coastal Flood Warning | AKQ | 13 hr |
| May 25, 5:38 PM EDT | Severe Thunderstorm Warning | AKQ | 37 min |
| May 25, 6:11 PM EDT | Severe Thunderstorm Warning | AKQ | 49 min |
| May 28, 9:53 PM EDT | Coastal Flood Statement | AKQ | 10 hr |
| May 29, 4:39 PM EDT | Coastal Flood Advisory | AKQ | 17 hr |
| May 30, 10:17 AM EDT | Coastal Flood Statement | AKQ | 10 hr |
| May 30, 4:11 PM EDT | Coastal Flood Advisory | AKQ | 15 hr |
| Jun 7, 6:41 PM EDT | Coastal Flood Advisory | AKQ | 33 hr |
| Jun 14, 1:12 PM EDT | Special Weather Statement | AKQ | 48 min |
| Jun 14, 2:01 PM EDT | Special Weather Statement | AKQ | 44 min |
| Jun 19, 12:48 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 8:01 PM EDT | Severe Thunderstorm Warning | AKQ | 44 min |
| Jun 19, 11:37 PM EDT | Special Weather Statement | AKQ | 53 min |
| Jun 23, 5:24 PM EDT | Coastal Flood Statement | AKQ | 9 hr |
| Jun 24, 6:19 AM EDT | Special Weather Statement | AKQ | 41 min |
| Jun 27, 9:27 PM EDT | Special Weather Statement | AKQ | 33 min |
| Jul 1, 7:48 PM EDT | Special Weather Statement | AKQ | 57 min |
| Jul 4, 2:16 PM EDT | Special Weather Statement | AKQ | 44 min |
| Jul 6, 11:09 AM EDT | Special Weather Statement | AKQ | 51 min |
| Jul 6, 11:37 AM EDT | Special Weather Statement | AKQ | 38 min |
| Jul 6, 12:13 PM EDT | Special Weather Statement | AKQ | 47 min |
| Jul 8, 5:46 PM EDT | Special Weather Statement | AKQ | 44 min |
| Jul 8, 6:13 PM EDT | Severe Thunderstorm Warning | AKQ | 47 min |
| Jul 12, 3:40 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 13, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 14, 4:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 14, 7:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jul 14, 7:20 PM EDT | Special Weather Statement | AKQ | 40 min |
| Jul 14, 7:42 PM EDT | Special Weather Statement | AKQ | 48 min |
| Jul 14, 9:15 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jul 20, 3:46 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 21, 3:51 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 22, 7:46 PM EDT | Special Weather Statement | AKQ | 44 min |
| Jul 23, 12:33 AM EDT | Special Weather Statement | AKQ | 42 min |
| Jul 23, 12:42 AM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jul 24, 4:48 PM EDT | Coastal Flood Statement | AKQ | 12 hr |
| Jul 24, 6:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 26, 4:29 PM EDT | Coastal Flood Statement | AKQ | 18 hr |
| Jul 27, 3:20 PM EDT | Flash Flood Watch | AKQ | 42 hr |
| Jul 28, 6:58 PM EDT | Special Weather Statement | AKQ | 47 min |
| Jul 28, 7:17 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jul 29, 3:54 PM EDT | Coastal Flood Advisory | AKQ | 32 hr |
| Jul 31, 3:38 AM EDT | Coastal Flood Statement | AKQ | 9 hr |
| Jul 31, 4:44 PM EDT | Coastal Flood Statement | AKQ | 7 hr |
| Aug 7, 3:32 AM EDT | Flash Flood Watch | AKQ | 18 hr |
| Aug 7, 12:16 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 12:25 PM EDT | Special Weather Statement | AKQ | 50 min |
| Aug 7, 1:22 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 7, 4:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 7, 4:28 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 7, 6:03 PM EDT | Coastal Flood Statement | AKQ | 13 hr |
| Aug 7, 6:28 PM EDT | Special Weather Statement | AKQ | 47 min |
| Aug 12, 2:06 AM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 12, 6:27 AM EDT | Special Weather Statement | AKQ | 78 min |
| Aug 12, 7:45 AM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 18, 2:27 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 18, 3:59 PM EDT | Coastal Flood Advisory | AKQ | 10 hr |
| Aug 18, 8:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 18, 8:52 PM EDT | Special Weather Statement | AKQ | 38 min |
| Aug 18, 9:17 PM EDT | Severe Thunderstorm Warning | AKQ | 43 min |
| Aug 28, 3:36 AM EDT | Flash Flood Watch | AKQ | 41 hr |
| Aug 28, 2:58 PM EDT | Wind Advisory | AKQ | 33 hr |
| Aug 29, 12:50 PM EDT | Areal Flood Advisory | AKQ | 115 min |
| Aug 29, 2:46 PM EDT | Areal Flood Advisory | AKQ | 119 min |
| Aug 30, 5:25 PM EDT | Coastal Flood Advisory | AKQ | 11 hr |
| Aug 31, 6:10 AM EDT | Coastal Flood Advisory | AKQ | 8 hr |
| Sep 2, 5:17 PM EDT | Coastal Flood Advisory | AKQ | 8 hr |
| Sep 2, 6:49 PM EDT | Special Weather Statement | AKQ | 41 min |
| Sep 2, 7:46 PM EDT | Special Weather Statement | AKQ | 44 min |
| Sep 5, 10:44 PM EDT | Special Weather Statement | AKQ | 46 min |
| Sep 6, 5:43 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Sep 18, 5:50 PM EDT | Coastal Flood Advisory | AKQ | 4 days |
| Sep 20, 4:02 AM EDT | Coastal Flood Warning | AKQ | 15 hr |
| Sep 22, 7:09 AM EDT | Coastal Flood Advisory | AKQ | 23 hr |
| Sep 23, 6:27 AM EDT | Coastal Flood Advisory | AKQ | 25 hr |
| Sep 23, 1:59 PM EDT | Coastal Flood Advisory | AKQ | 19 hr |
| Oct 12, 4:48 AM EDT | Coastal Flood Statement | AKQ | 37 hr |
| Oct 12, 4:53 PM EDT | Coastal Flood Advisory | AKQ | 31 hr |
| Oct 23, 10:17 PM EDT | Coastal Flood Statement | AKQ | 11 hr |
| Oct 24, 8:58 AM EDT | Coastal Flood Advisory | AKQ | 12 hr |
| Oct 29, 7:07 PM EDT | Coastal Flood Statement | AKQ | 3 hr |
| Oct 29, 10:17 PM EDT | Coastal Flood Advisory | AKQ | 5 hr |
| Nov 5, 3:10 AM EST | Coastal Flood Statement | AKQ | 13 hr |
| Nov 6, 4:15 AM EST | Coastal Flood Advisory | AKQ | 15 hr |
| Nov 6, 8:05 PM EST | Special Weather Statement | AKQ | 40 min |
| Nov 7, 8:22 PM EST | Coastal Flood Advisory | AKQ | 50 hr |
| Nov 9, 3:33 AM EST | Freeze Watch | AKQ | 24 hr |
| Nov 10, 3:18 AM EST | Freeze Warning | AKQ | 31 hr |
| Nov 16, 10:17 AM EST | Coastal Flood Statement | AKQ | 4 hr |
| Dec 8, 6:06 AM EST | Winter Weather Advisory | AKQ | 40 hr |
| Dec 8, 2:52 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 8, 3:09 PM EST | Winter Storm Warning | AKQ | 28 hr |
| Dec 24, 3:09 PM EST | Wind Advisory | AKQ | 21 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 | 5 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 31 |
| Flooding | |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 10 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Coast and beach | |
| Coastal Flood Warning | 2 |
| Coastal Flood Advisory | 24 |
| Coastal Flood Statement | 20 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.