Alert archive / Maryland / Frederick County / 2021
Weather alerts in Frederick County, Maryland, May 2021
18 weather alerts in May 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 18
- Warnings
- 12
- Watches
- 2
- Advisories
- 1
- Busiest day
- May 26, 202110 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 |
|---|---|---|---|
| May 3, 6:50 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| May 3, 7:16 PM EDT | Mesoscale Discussion | SPC | 29 min |
| May 3, 7:40 PM EDT | Tornado Warning | LWX | 35 min |
| May 3, 8:11 PM EDT | Tornado Warning | LWX | 34 min |
| May 3, 8:47 PM EDT | Areal Flood Warning | LWX | 3 hr |
| May 3, 8:49 PM EDT | Severe Thunderstorm Warning | LWX | 26 min |
| May 4, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 17, 2:51 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| May 26, 1:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 26, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 26, 2:51 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 26, 3:21 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 26, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| May 26, 3:56 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| May 26, 3:59 PM EDT | Severe Thunderstorm Warning | LWX | 9 min |
| May 26, 6:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 26, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 26, 7:21 PM EDT | Severe Thunderstorm Warning | LWX | 39 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 | 9 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 3 |
| Flooding | |
| Areal Flood Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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. Rebuilt daily.