Frederick County weather alerts
There are no active weather alerts for Frederick County, MD right now.
Since 2016 the National Weather Service has issued about 1,286 alerts that included Frederick County, roughly 129 a year. The most common is the severe thunderstorm warning (399 from 2016 to 2025). The last tornado warning was issued on July 18, 2026. 35 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Frederick County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Washington County, Loudoun County, Carroll County, Montgomery County.
Frederick County alert history
Alert events that included Frederick County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 399 | 53 | September 4, 2026 |
| Flood Warning | 110 | 2 | October 12, 2026 |
| Severe Thunderstorm Watch | 102 | 21 | October 16, 2026 |
| Wind Advisory | 97 | 3 | March 16, 2026 |
| Flood Watch | 94 | 5 | July 21, 2026 |
| Winter Weather Advisory | 77 | 1 | March 2, 2026 |
| Dense Fog Advisory | 72 | 3 | March 6, 2026 |
| Frost Advisory | 44 | 3 | October 25, 2026 |
| Heat Advisory | 39 | 4 | July 16, 2026 |
| Freeze Warning | 37 | 6 | October 25, 2026 |
| Flash Flood Warning | 29 | 3 | August 10, 2026 |
| Freeze Watch | 29 | 4 | October 18, 2026 |
| Winter Storm Warning | 25 | 2 | February 22, 2026 |
| Winter Storm Watch | 20 | 2 | February 22, 2026 |
| Tornado Watch | 19 | 3 | July 18, 2026 |
| Tornado Warning | 16 | 5 | July 18, 2026 |
| Cold Weather Advisory | 12 | 9 | February 9, 2026 |
| Extreme Heat Watch | 12 | 2 | July 4, 2026 |
| Red Flag Warning | 11 | 0 | March 26, 2025 |
| Fire Weather Watch | 10 | 0 | March 26, 2025 |
| High Wind Warning | 9 | 1 | February 7, 2026 |
| High Wind Watch | 8 | 0 | February 16, 2025 |
| Snow Squall Warning | 7 | 3 | January 1, 2026 |
| Extreme Heat Warning | 6 | 3 | July 4, 2026 |
| Blizzard Warning | 1 | 0 | January 22, 2016 |
| Ice Storm Warning | 1 | 0 | December 15, 2022 |
| Extreme Cold Watch | 0 | 1 | February 7, 2026 |
| Extreme Cold Warning | 0 | 1 | February 7, 2026 |
Tornado history in Frederick County
35 tornadoes have been recorded in Frederick County since 1950, injuring 1 people. That ranks 1 of 24 counties in Maryland. The most recent was on May 3, 2021 (rated EF0).
Strongest tornadoes in Frederick County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 22, 1983 | F3 | Frederick County | 2 mi | 37 yd | 0 | 0 |
| September 17, 2004 | F2 | Frederick County | 3 mi | 200 yd | 0 | 0 |
| July 31, 1978 | F2 | Frederick County | 1.5 mi | 100 yd | 0 | 0 |
| July 19, 1963 | F1 | Frederick County | 14.4 mi | 600 yd | 0 | 0 |
| September 17, 2004 | F1 | Frederick County | 7 mi | 100 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 3, 2021 | EF0 | Frederick County | 0.6 mi | 150 yd | 0 | 0 |
| May 3, 2021 | EF0 | Frederick County | 0.8 mi | 200 yd | 0 | 0 |
| February 7, 2020 | EF1 | Frederick County | 6.7 mi | 150 yd | 0 | 0 |
| May 30, 2019 | EF0 | Frederick County | 6.5 mi | 75 yd | 0 | 0 |
| June 20, 2015 | EF0 | Frederick County | 1.5 mi | 75 yd | 0 | 0 |
About Frederick County
- Population: 299,317 (2024 estimate)
- State: Maryland
- NOAA Weather Radio SAME code: 024021 (how to use it)