Alert archive / Maryland / Garrett County
Weather alerts in Garrett County, Maryland, 2009
35 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 35
- Warnings
- 11
- Watches
- 5
- Advisories
- 1
- Busiest month
- June15 alerts
- Busiest day
- June 18, 20097 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, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 4 | 56% | 3 | 100% | 36 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 14 | 0 | 100% | 0 | ||
| NWS Pittsburgh, PA: severe thunderstorm warnings | 115 | 66 | 43% | 119 | 78% | 25 min |
| NWS Pittsburgh, PA: flash flood warnings | 9 | 6 | 33% | 11 | 91% | 72 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 28, 12:31 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 11, 5:32 PM EST | Mesoscale Discussion | SPC | 88 min |
| Feb 11, 5:53 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 11, 7:26 PM EST | Severe Thunderstorm Warning | PBZ | 64 min |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 18, 1:05 AM EST | Mesoscale Discussion | SPC | 4 hr |
| May 4, 8:32 AM EDT | Areal Flood Warning | PBZ | 12 hr |
| May 16, 12:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 28, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 8:43 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 9, 1:14 PM EDT | Severe Thunderstorm Warning | PBZ | 61 min |
| Jun 9, 1:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 9, 2:03 PM EDT | Severe Thunderstorm Warning | PBZ | 57 min |
| Jun 9, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 9, 3:05 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Jun 17, 9:00 PM EDT | Severe Thunderstorm Warning | PBZ | 60 min |
| Jun 17, 9:22 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Jun 17, 9:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 17, 9:56 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 17, 10:17 PM EDT | Severe Thunderstorm Warning | PBZ | 58 min |
| Jun 17, 11:27 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| Jun 18, 12:20 AM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jun 19, 5:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 19, 6:28 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 20, 3:14 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 21, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 21, 5:31 PM EDT | Severe Thunderstorm Warning | PBZ | 44 min |
| Jul 25, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 12, 12:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 18, 2:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 20, 6:54 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 20, 10:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Oct 24, 5:25 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Dec 8, 1:14 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 19, 6:57 AM EST | Mesoscale Discussion | SPC | 6 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 | 9 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 18 |
| Flooding | |
| Areal Flood Warning | 2 |
| Areal Flood Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.