Alert archive / Maryland / Garrett County
Weather alerts in Garrett County, Maryland, 2020
42 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Garrett County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 42
- Warnings
- 10
- Watches
- 3
- Advisories
- 2
- Busiest month
- August15 alerts
- Busiest day
- August 25, 20207 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Garrett County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 6 | 40% | 8 | 100% | 28 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 27 | 6 | 78% | 15 | 47% | 9 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 456 | 314 | 31% | 1,047 | 79% | 23 min |
| NWS Baltimore/Washington: flash flood warnings | 66 | 34 | 48% | 130 | 90% | 72 min |
| NWS Pittsburgh, PA: tornado warnings | 10 | 3 | 70% | 8 | 38% | 4 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 213 | 143 | 33% | 555 | 83% | 19 min |
| NWS Pittsburgh, PA: flash flood warnings | 24 | 19 | 21% | 49 | 90% | 83 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 7, 8:49 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 11, 5:41 PM EST | Special Weather Statement | PBZ | 79 min |
| Feb 26, 2:49 PM EST | Mesoscale Discussion | SPC | 116 min |
| Mar 3, 1:22 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 3, 4:27 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 9:20 PM EST | Special Weather Statement | PBZ | 25 min |
| Mar 20, 12:21 PM EDT | Special Weather Statement | PBZ | 54 min |
| Mar 28, 5:38 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Mar 28, 5:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 7, 11:40 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 8, 1:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 8, 2:24 AM EDT | Special Weather Statement | PBZ | 36 min |
| Apr 8, 2:32 AM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Apr 13, 3:57 AM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| May 10, 8:19 PM EDT | Special Weather Statement | PBZ | 56 min |
| May 10, 9:20 PM EDT | Special Weather Statement | PBZ | 40 min |
| May 28, 4:05 PM EDT | Special Weather Statement | PBZ | 25 min |
| Jun 3, 3:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 4:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 22, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 6, 6:48 PM EDT | Areal Flood Advisory | PBZ | 117 min |
| Jul 7, 5:47 PM EDT | Special Weather Statement | PBZ | 28 min |
| Jul 16, 9:22 PM EDT | Special Weather Statement | PBZ | 53 min |
| Jul 22, 10:48 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 22, 11:39 AM EDT | Special Weather Statement | PBZ | 36 min |
| Aug 1, 7:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 1, 8:12 PM EDT | Special Weather Statement | PBZ | 48 min |
| Aug 12, 7:11 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Aug 25, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 25, 2:26 PM EDT | Severe Thunderstorm Warning | PBZ | 23 min |
| Aug 25, 2:50 PM EDT | Special Weather Statement | PBZ | 25 min |
| Aug 25, 4:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 25, 4:48 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Aug 25, 5:03 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Aug 25, 5:19 PM EDT | Special Weather Statement | PBZ | 26 min |
| Aug 27, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 5:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 27, 7:40 PM EDT | Severe Thunderstorm Warning | PBZ | 65 min |
| Aug 27, 8:42 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Aug 28, 7:12 PM EDT | Special Weather Statement | PBZ | 33 min |
| Nov 15, 3:38 PM EST | Severe Thunderstorm Warning | LWX | 55 min |
| Nov 15, 4:58 PM EST | Severe Thunderstorm Warning | LWX | 47 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 | 10 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 14 |
| Flooding | |
| Areal Flood Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.