Alert archive / Maryland / Frederick County / 2020
Weather alerts in Frederick County, Maryland, September 2020
13 weather alerts in September 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 13
- Warnings
- 7
- Watches
- 2
- Advisories
- 2
- Busiest day
- September 2, 20206 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|
| Sep 2, 3:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 2, 6:17 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Sep 2, 6:32 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Sep 2, 6:43 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 2, 6:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Sep 2, 7:06 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Sep 3, 3:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 3, 3:30 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Sep 3, 3:41 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Sep 3, 3:42 PM EDT | Tornado Watch | SPC | 6 hr |
| Sep 3, 3:43 PM EDT | Tornado Warning | LWX | 19 min |
| Sep 20, 1:43 PM EDT | Frost Advisory | LWX | 19 hr |
| Sep 21, 1:31 PM EDT | Frost Advisory | LWX | 19 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 | 6 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 2 |
| Cold | |
| Frost Advisory | 2 |
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.