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Flood in Washington County, Maryland
118 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 118 flood events in Washington County, Maryland, between 1950 and 2026, spread over 19 years.
September is the busiest month, with 35 of the recorded events. The last 20 years account for 84 events against 34 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 3.3% of the 3,545 flood events recorded in Maryland; its 25.8 per 100 square miles compares with 36.5 statewide.
Compared with Maryland
| Measure | Washington County | Maryland | US |
|---|---|---|---|
| Flood events since 1950 | 118 | 3,545 | 183,559 |
| Per 100 square miles | 25.8 | 36.5 | 5.2 |
| Per 10,000 residents | 7.6 | 5.8 | 5.5 |
| Deaths recorded | 0 | 24 | 2,961 |
| Busiest month | September | July | June |
By year
Seasonality
5Feb
1Mar
5Apr
4May
31Jun
23Jul
8Aug
2Sep
35Oct
1Nov
1Dec
2
Recorded events
All 118 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 14 May 2025 | Flood | — | — | — | — | — | County |
| 14 May 2025 | Flood | — | — | — | — | — | County |
| 14 May 2025 | Flood | — | — | — | — | — | County |
| 14 May 2025 | Flood | — | — | — | — | — | County |
| 22 Jul 2024 | Flash Flood | — | — | — | — | — | County |
| 22 Jul 2024 | Flash Flood | — | — | — | — | — | County |
| 22 Jul 2024 | Flash Flood | — | — | — | — | — | County |
| 7 Sep 2022 | Flash Flood | — | — | — | — | — | County |
| 7 Sep 2022 | Flood | — | — | — | — | — | County |
| 7 Sep 2022 | Flood | — | — | — | — | — | County |
| 7 Sep 2022 | Flood | — | — | — | — | — | County |
| 7 May 2022 | Flood | — | — | — | — | — | County |
| 7 May 2022 | Flood | — | — | — | — | — | County |
| 23 Sep 2021 | Flood | — | — | — | — | — | County |
| 15 Sep 2021 | Flood | — | — | — | — | — | County |
| 15 Sep 2021 | Flood | — | — | — | — | — | County |
| 15 Sep 2021 | Flash Flood | — | — | — | — | — | County |
| 2 Sep 2021 | Flood | — | — | — | — | — | County |
| 2 Sep 2021 | Flood | — | — | — | — | — | County |
| 2 Sep 2021 | Flood | — | — | — | — | — | County |
| 2 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 11 Jun 2021 | Flood | — | — | — | — | — | County |
| 25 Dec 2020 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 19 May 2019 | Flood | — | — | — | — | — | County |
| 28 Sep 2018 | Flood | — | — | — | — | — | County |
| 28 Sep 2018 | Flood | — | — | — | — | — | County |
| 28 Sep 2018 | Flood | — | — | — | — | — | County |
| 28 Sep 2018 | Flood | — | — | — | — | — | County |
| 28 Sep 2018 | Flood | — | — | — | — | — | County |
| 28 Sep 2018 | Flood | — | — | — | — | — | County |
| 13 Sep 2018 | Flood | — | — | — | — | — | County |
| 9 Sep 2018 | Flood | — | — | — | — | — | County |
| 9 Sep 2018 | Flood | — | — | — | — | — | County |
| 9 Sep 2018 | Flood | — | — | — | — | — | County |
| 9 Sep 2018 | Flood | — | — | — | — | — | County |
| 7 Sep 2018 | Flood | — | — | — | — | — | County |
| 7 Sep 2018 | Flood | — | — | — | — | — | County |
| 21 Aug 2018 | Flood | — | — | — | — | — | County |
| 2 Aug 2018 | Flood | — | — | — | — | — | County |
| 23 Jul 2018 | Flood | — | — | — | — | — | County |
| 4 Jun 2018 | Flood | — | — | — | — | — | County |
| 4 Jun 2018 | Flood | — | — | — | — | — | County |
| 3 Jun 2018 | Flood | — | — | — | — | — | County |
| 2 Jun 2018 | Flood | — | — | — | — | — | County |
| 2 Jun 2018 | Flood | — | — | — | — | — | County |
| 2 Jun 2018 | Flood | — | — | — | — | — | County |
| 1 Jun 2018 | Flood | — | — | — | — | — | County |
| 1 Jun 2018 | Flood | — | — | — | — | — | County |
| 1 Jun 2018 | Flood | — | — | — | — | — | County |
| 26 May 2018 | Flood | — | — | — | — | — | County |
| 26 May 2018 | Flood | — | — | — | — | — | County |
| 15 May 2018 | Flash Flood | — | — | — | — | — | County |
| 15 May 2018 | Flash Flood | — | — | — | — | — | County |
| 15 May 2018 | Flash Flood | — | $50K | — | — | — | County |
| 15 May 2018 | Flood | — | — | — | — | — | County |
| 15 May 2018 | Flash Flood | — | $50K | — | — | — | County |
| 15 May 2018 | Flash Flood | — | — | — | — | — | County |
| 15 May 2018 | Flash Flood | — | $4.6M | — | — | — | County |
| 13 Jan 2018 | Flood | — | — | — | — | — | County |
| 1 Jul 2014 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2014 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2014 | Flash Flood | — | — | — | — | — | County |
| 25 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 25 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 12 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 12 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 16 May 2014 | Flash Flood | — | — | — | — | — | County |
| 16 May 2014 | Flood | — | — | — | — | — | County |
| 16 May 2014 | Flood | — | — | — | — | — | County |
| 30 Oct 2012 | Flood | — | — | — | — | — | County |
| 29 May 2012 | Flash Flood | — | — | — | — | — | County |
| 29 May 2012 | Flash Flood | — | — | — | — | — | County |
| 28 Apr 2011 | Flash Flood | — | — | — | — | — | County |
| 28 Apr 2011 | Flood | — | — | — | — | — | County |
| 28 Apr 2011 | Flash Flood | — | — | — | — | — | County |
| 28 Apr 2011 | Flash Flood | — | — | — | — | — | County |
| 12 May 2008 | Flood | — | $20K | — | — | — | County |
| 27 Jun 2006 | Flash Flood | — | $25K | — | — | — | County |
| 25 Jun 2006 | Flash Flood | — | — | — | — | — | County |
| 28 Mar 2005 | Flash Flood | — | — | — | — | — | County |
| 28 Sep 2004 | Flash Flood | — | — | — | — | — | County |
| 28 Sep 2004 | Flood | — | — | — | — | — | Forecast zone |
| 17 Sep 2004 | Flash Flood | — | — | — | — | — | County |
| 8 Sep 2004 | Flash Flood | — | $25K | — | — | — | County |
| 14 Jun 2004 | Flash Flood | — | — | — | — | — | County |
| 11 Dec 2003 | Flood | — | — | — | — | — | Forecast zone |
| 4 Sep 2003 | Flood | — | — | — | — | — | Forecast zone |
| 3 Sep 2003 | Flash Flood | — | $20K | — | — | — | County |
| 13 Jun 2003 | Flash Flood | — | — | — | — | — | County |
| 7 Jun 2003 | Flood | — | — | — | — | — | Forecast zone |
| 3 Jun 2003 | Flash Flood | — | — | — | — | — | County |
| 3 Jun 2003 | Flood | — | — | — | — | — | Forecast zone |
| 16 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 16 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 20 Mar 2003 | Flood | — | — | — | — | — | Forecast zone |
| 1 Jan 2003 | Flood | — | — | — | — | — | Forecast zone |
| 1 Jan 2003 | Flood | — | — | — | — | — | Forecast zone |
| 22 Mar 2000 | Flood | — | — | — | — | — | Forecast zone |
| 21 Mar 2000 | Flash Flood | — | — | — | — | — | County |
| 8 May 1998 | Flash Flood | — | $3K | — | — | — | County |
| 20 Mar 1998 | Flash Flood | — | $10K | — | — | — | County |
| 4 Feb 1998 | Flash Flood | — | $5K | — | — | — | County |
| 7 Nov 1997 | Flash Flood | — | $5K | — | — | — | County |
| 10 Sep 1997 | Flash Flood | — | $15K | — | — | — | County |
| 6 Sep 1996 | Flood | — | $500K | $20K | — | — | Forecast zone |
| 6 Sep 1996 | Flash Flood | — | $150K | $35K | — | — | County |
| 30 Jul 1996 | Flash Flood | — | $15K | — | — | — | County |
| 20 Jun 1996 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 1996 | Flash Flood | — | $1.0M | — | — | — | County |
| 19 Jan 1996 | Flash Flood | — | $1.0M | — | — | — | County |
| 19 Jan 1996 | Flood | — | $15M | — | — | — | Forecast zone |
Questions and answers
How many flood events has Washington County had?
118 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Washington County?
14 May 2025 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Washington County?
The flood of 19 Jan 1996, with property damage estimated by NCEI at $15M.
How does Washington County compare with Maryland for flood?
25.8 events per 100 square miles against 36.5 statewide; the county holds 118 of the state's 3,545 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.