National Weather ServiceMarylandFlood WatchArchive to October 1, 2026
Flood Watches in Maryland
The National Weather Service issued 47 flood watches for Maryland in 2025 and 24 a year on average in 2008-2025; in 2021-2025 it had the 11th most of any state. 2026 through September: 17, 14% below the average of 20 for those months in 2008-2025. Washington was covered most often (123 times since 2008).
How many flood watches does Maryland get?
Every flood watch that covered part of Maryland. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 17 |
| 2025 | 47 |
| 2024 | 57 |
| 2023 | 23 |
| 2022 | 27 |
| 2021 | 26 |
| 2020 | 22 |
| 2019 | 13 |
| 2018 | 67 |
| 2017 | 3 |
| 2016 | 13 |
| 2015 | 8 |
| 2014 | 18 |
| 2013 | 14 |
| 2012 | 12 |
| 2011 | 34 |
| 2010 | 11 |
| 2009 | 18 |
| 2008 | 16 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Maryland get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Maryland?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Washington | 123 | 32 | July 9, 2026 |
| Frederick | 116 | 35 | July 21, 2026 |
| Prince Georges | 112 | 47 | August 16, 2026 |
| Anne Arundel | 111 | 47 | August 5, 2026 |
| Southern Baltimore | 109 | 47 | August 5, 2026 |
| Central and Southeast Montgomery | 95 | 54 | August 16, 2026 |
| Northern Baltimore | 86 | 34 | July 28, 2026 |
| Cecil | 86 | 34 | July 28, 2026 |
| Northwest Montgomery | 80 | 45 | July 21, 2026 |
| Central and Southeast Howard | 80 | 44 | August 2, 2026 |
| Carroll | 76 | 29 | July 21, 2026 |
| Southeast Harford | 68 | 38 | August 5, 2026 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
What is a flood watch?
A flood watch means conditions may lead to flooding in the coming day or days; it is not yet happening. A watch means the conditions for the hazard are possible or favourable, but it is not yet happening: be ready to act if a warning follows. The national record · Every warning type in Maryland.