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Flood in Baltimore County, Maryland

476 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.

476 events · 2 deaths recorded · peak month July · county share of state 13.4%

2025-08-14: Flood2025-08-13: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-31: Flood2025-07-14: Flood2025-07-14: Flood2025-07-13: Flood2025-07-13: Flood2025-07-13: Flood2025-07-13: Flood2025-07-13: Flood2025-07-09: Flood2025-07-09: Flood2025-07-01: Flood2025-07-01: Flood2025-06-30: Flood2025-06-30: Flood2025-05-30: Flood2024-08-06: Flood2024-08-06: Flood2024-08-02: Flood2024-08-02: Flood2024-08-02: Flood2024-08-02: Flood2024-07-17: Flood2024-07-17: Flood2024-07-17: Flood2024-07-09: Flood2024-05-27: Flood2024-01-09: Flood2024-01-09: Flood2024-01-09: Flood2024-01-09: Flood2024-01-09: Flood2024-01-09: Flood2023-12-18: Flood2023-09-13: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-09-12: Flood2023-07-25: Flood2023-07-25: Flood2023-07-25: Flood2023-07-25: Flood2023-07-07: Flood2023-07-03: Flood2023-07-03: Flood2023-07-03: Flood2022-09-12: Flood2022-09-12: Flood2022-09-12: Flood2022-09-12: Flood2022-08-22: Flood2022-08-05: Flood2022-08-04: Flood2022-08-04: Flood2022-08-04: Flood2022-08-04: Flood2022-08-04: Flood2022-07-16: Flood2022-07-02: Flood2022-07-02: Flood2022-07-02: Flood2022-07-02: Flood2022-07-02: Flood2022-07-02: Flood2022-06-08: Flood2022-06-08: Flood2022-06-08: Flood2021-09-23: Flood2021-09-23: Flood2021-09-23: Flood2021-09-23: Flood2021-09-23: Flood2021-09-01: Flood2021-09-01: Flood2021-09-01: Flood2021-09-01: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-07-17: Flood2021-06-14: Flood2021-06-14: Flood2021-06-11: Flood2021-06-11: Flood2021-06-10: Flood2021-06-10: Flood2021-06-10: Flood2021-06-10: Flood2021-06-10: Flood2021-06-10: Flood2021-06-10: Flood2021-06-03: Flood2020-12-25: Flood2020-11-30: Flood2020-11-30: Flood2020-11-30: Flood2020-07-24: Flood2020-07-24: Flood2020-07-24: Flood2020-07-24: Flood2020-07-24: Flood2019-08-06: Flood2018-07-24: Flood2018-05-27: Flood2017-07-17: Flood2016-06-21: Flood2015-08-24: Flood2015-06-27: Flood2015-06-08: Flood2014-08-12: Flood2008-09-27: Flood2008-09-27: Flood
Flood event locations in and around Baltimore County. Dots: Flood event locations in the kept record. Boundaries: US Census Bureau.

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.

Baltimore County, Maryland, has 476 flood events in the NCEI record since 1950, with at least one in 26 different years.

July is the busiest month, with 151 of the recorded events. The last 20 years account for 444 events against 32 in the 20 years before, a change that reflects reporting practice as much as weather.

The county holds 13.4% of the 3,545 flood events recorded in Maryland; its 79.6 per 100 square miles compares with 36.5 statewide.

NCEI attributes 2 deaths in the county to floods and flash floods.

Compared with Maryland

MeasureBaltimore CountyMarylandUS
Flood events since 19504763,545183,559
Per 100 square miles79.636.55.2
Per 10,000 residents5.65.85.5
Deaths recorded2242,961
Busiest monthJulyJulyJune

By year

195019882026
Flood events recorded in Baltimore County per year, 1950 to 2026 (2026 is partial).

Seasonality

Jan
7Feb
5Mar
7Apr
19May
15Jun
52Jul
151Aug
114Sep
79Oct
9Nov
8Dec
10
Flood events in Baltimore County by month of occurrence, all years.

Recorded events

The 150 events kept for this page are the 120 most recent plus the 80 with the most damage, deaths or injuries out of 476. Magnitude is hail size, tornado rating or wind speed as recorded.

DateEvent typeMagnitudeProperty damageCrop damageDeathsInjuriesGeography
14 Aug 2025Flash Flood—————County
13 Aug 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
31 Jul 2025Flash Flood—————County
14 Jul 2025Flood—————County
14 Jul 2025Flood—————County
13 Jul 2025Flash Flood—————County
13 Jul 2025Flash Flood—————County
13 Jul 2025Flash Flood—————County
13 Jul 2025Flash Flood—————County
13 Jul 2025Flood—————County
9 Jul 2025Flash Flood—————County
9 Jul 2025Flood—————County
1 Jul 2025Flash Flood—————County
1 Jul 2025Flash Flood—————County
30 Jun 2025Flash Flood—————County
30 Jun 2025Flood—————County
30 May 2025Flood—————County
6 Aug 2024Flash Flood—————County
6 Aug 2024Flash Flood—————County
2 Aug 2024Flash Flood—————County
2 Aug 2024Flash Flood—————County
2 Aug 2024Flash Flood—————County
2 Aug 2024Flash Flood—————County
17 Jul 2024Flood—————County
17 Jul 2024Flood—————County
17 Jul 2024Flash Flood—————County
9 Jul 2024Flash Flood—————County
27 May 2024Flash Flood—————County
9 Jan 2024Flood—————County
9 Jan 2024Flood—————County
9 Jan 2024Flood—————County
9 Jan 2024Flood—————County
9 Jan 2024Flood—————County
9 Jan 2024Flood—————County
18 Dec 2023Flood—————County
13 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—————County
12 Sep 2023Flash Flood—$500K———County
25 Jul 2023Flash Flood—————County
25 Jul 2023Flash Flood—————County
25 Jul 2023Flash Flood—————County
25 Jul 2023Flash Flood—————County
7 Jul 2023Flood—————County
3 Jul 2023Flood—————County
3 Jul 2023Flash Flood—————County
3 Jul 2023Flash Flood—————County
12 Sep 2022Flash Flood—————County
12 Sep 2022Flood—————County
12 Sep 2022Flood—————County
12 Sep 2022Flood—————County
22 Aug 2022Flood—————County
5 Aug 2022Flood—————County
4 Aug 2022Flash Flood—————County
4 Aug 2022Flash Flood—————County
4 Aug 2022Flash Flood—————County
4 Aug 2022Flash Flood—————County
4 Aug 2022Flood—————County
16 Jul 2022Flood—————County
2 Jul 2022Flood—————County
2 Jul 2022Flood—————County
2 Jul 2022Flash Flood—————County
2 Jul 2022Flash Flood—————County
2 Jul 2022Flash Flood—————County
2 Jul 2022Flash Flood—————County
8 Jun 2022Flash Flood—————County
8 Jun 2022Flood—————County
8 Jun 2022Flash Flood—————County
23 Sep 2021Flood—————County
23 Sep 2021Flood—————County
23 Sep 2021Flood—————County
23 Sep 2021Flood—————County
23 Sep 2021Flood—————County
1 Sep 2021Flood—————County
1 Sep 2021Flood—————County
1 Sep 2021Flood—————County
1 Sep 2021Flood—————County
17 Jul 2021Flash Flood—————County
17 Jul 2021Flood—————County
17 Jul 2021Flood—————County
17 Jul 2021Flood—————County
17 Jul 2021Flash Flood—————County
17 Jul 2021Flash Flood—————County
17 Jul 2021Flash Flood—————County
17 Jul 2021Flash Flood—————County
17 Jul 2021Flash Flood—————County
17 Jul 2021Flash Flood—————County
17 Jul 2021Flash Flood—————County
14 Jun 2021Flash Flood—————County
14 Jun 2021Flash Flood—————County
11 Jun 2021Flood—————County
11 Jun 2021Flood—————County
10 Jun 2021Flash Flood—————County
10 Jun 2021Flood—————County
10 Jun 2021Flood—————County
10 Jun 2021Flood—————County
10 Jun 2021Flood—————County
10 Jun 2021Flood—————County
10 Jun 2021Flood—————County
3 Jun 2021Flood—————County
25 Dec 2020Flood—————County
30 Nov 2020Flood—————County
30 Nov 2020Flood—————County
30 Nov 2020Flood—————County
24 Jul 2020Flash Flood—$50K———County
24 Jul 2020Flash Flood—$50K———County
24 Jul 2020Flash Flood—$30K———County
24 Jul 2020Flash Flood—$20K———County
24 Jul 2020Flash Flood—$10K———County
6 Aug 2019Flash Flood—$500K———County
24 Jul 2018Flood—$30K———County
27 May 2018Flash Flood—$8.6M———County
17 Jul 2017Flash Flood—$10K———County
21 Jun 2016Flood—$5K———County
24 Aug 2015Flash Flood—$5K———County
27 Jun 2015Flash Flood—$20K———County
8 Jun 2015Flash Flood—$10K———County
12 Aug 2014Flash Flood—$20K———County
27 Sep 2008Flash Flood—$1K———County
27 Sep 2008Flash Flood—$1K———County
27 Jun 2006Flash Flood—$50K———County
25 Jun 2006Flash Flood—$100K———County
24 Jun 2006Flash Flood—$40K———County
2 Jun 2006Flash Flood—$25K———County
1 Jun 2006Flash Flood—$10K———County
7 Jul 2004Flash Flood—$25K———County
16 Sep 1999Flash Flood—$10K———County
26 Aug 1999Flash Flood—$2.5M———County
13 Dec 1996Flash Flood—$10K———County
8 Sep 1996Flash Flood—$10K———County
8 Jul 1996Flash Flood—$10K———County
19 Jun 1996Flash Flood—$25K—2—County
19 Jun 1996Flash Flood—$25K———County
17 Jun 1996Flash Flood—$50K———County

Questions and answers

How many flood events has Baltimore County had?

476 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 Baltimore County?

14 Aug 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.

What was the most damaging flood event recorded in Baltimore County?

The flash flood of 27 May 2018, with property damage estimated by NCEI at $8.6M.

How does Baltimore County compare with Maryland for flood?

79.6 events per 100 square miles against 36.5 statewide; the county holds 476 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.