Flood events in Somerset County, New Jersey The flood events on record, by date and by year

This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).

NCEI has 221 flood events on record for Somerset County, New Jersey, from 1996 through 30 Jun 2026.

The newest flood event on record is on 31 Jul 2025.

From 2016 through 2025, NCEI has 60 flood events on record for the county.

The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.
The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.
Zone (NWS Forecast Zone): A zone is a geographic area defined by the NWS for issuing forecasts, watches, and warnings. While zones often align with counties, they can also represent smaller or subdivided areas within a county to account for differences in weather conditions, such as elevation or proximity to water. Larger-scale events—such as heat, cold, drought, and winter storms—are typically recorded by zone.
The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on 2 Oct 2026.

Date of the data: NCEI storm events through 30 Jun 2026. Event types on this page: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.

Newest flood events on record

Jul 31 2025

Flash Flood

2 miles NE of GREEN BROOK

Flash Flood

1 mile SE of PLUCKEMIN

Jul 14 2025

Flood

2 miles NE of BOUND BROOK

Flash Flood

3 miles NE of WATCHUNG

Flash Flood

1 mile W of BOUND BROOK

Flash Flood

1 mile SE of MANVILLE. Damage estimate: $15 thousand

Flash Flood

1 mile SW of GREEN BROOK. Damage estimate: $30 thousand

Flash Flood

1 mile NW of BOUND BROOK

Flash Flood

2 miles SW of GREEN BROOK

Flash Flood

6 miles NE of WATCHUNG

May 14 2025

Flash Flood

4 miles ENE of GREEN BROOK

Aug 18 2024

Flash Flood

1 mile SE of SOMERVILLE

Jan 10 2024

Flood

1 mile NW of SOMERVILLE ARPT

Dec 28 2023

Flood

1 mile SE of FAR HILLS

Dec 18 2023

Flood

2 miles W of PLUCKEMIN

Jul 15 2023

Flash Flood

2 miles E of CLYDE

Jul 9 2023

Flash Flood

1 mile NW of SOMERVILLE ARPT

Aug 22 2022

Flash Flood

2 miles WSW of NORTH BRANCH

Jun 1 2022

Flash Flood

2 miles ENE of GREEN BROOK

Oct 26 2021

Flash Flood

1 mile N of BOUND BROOK JCT

Flash Flood

2 miles NNW of MONTGOMERY

Flash Flood

1 mile SSW of SOUTH BRANCH

Flash Flood

1 mile SE of GREEN BROOK

Sep 1 2021

Flash Flood

1 mile WNW of BRANCHBURG PARK. Damage estimate: $85 million

Flash Flood

1 mile WNW of BRANCHBURG PARK. Damage estimate: $26 million

A place is the text of the NCEI record: a distance and a direction from a reference place. The site does not show a place text that names a private property or reads as a person. NCEI gives no magnitude for this hazard.

Flood events by year

Flood events on record for Somerset County by year, 1950 to 2026
Decade	Year that ends in 0	Year that ends in 1	Year that ends in 2	Year that ends in 3	Year that ends in 4	Year that ends in 5	Year that ends in 6	Year that ends in 7	Year that ends in 8	Year that ends in 9	All
1950s	0	0	0	0	0	0	0	0	0	0	0
1960s	0	0	0	0	0	0	0	0	0	0	0
1970s	0	0	0	0	0	0	0	0	0	0	0
1980s	0	0	0	0	0	0	0	0	0	0	0
1990s	0	0	0	0	0	0	10	2	4	3	19
2000s	4	3	5	16	11	11	6	9	9	12	86
2010s	7	14	7	11	11	6	4	6	9	9	84
2020s	1	12	2	4	2	11	0 (part of the year)				32

A darker cell has a larger count. The number is in each cell.

Flood and flash flood events are on record from 1996. The year 2026 has the events through 30 Jun 2026 only.

By month, all years

Jan18 events
Feb9 events
Mar21 events
Apr18 events
May7 events
Jun15 events
Jul39 events
Aug35 events
Sep10 events
Oct19 events
Nov6 events
Dec24 events

Beside the other counties

Flood events on record: Somerset County beside the total of the counties of New Jersey and of the United States
Measure	Somerset	All counties of New Jersey	All counties of the United States
Flood events, 1996 to 2026	221	3,014	177,902
Events for each 100 square miles	73.2	41.0	5.0
Events for each 10,000 residents	6.4	3.3	5.4

The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. A forecast zone with another name than a county counts for the state only.

More flood events on record

Flood events on record for Somerset County, newest first, without the 25 newest events above
Date	Event type	Magnitude	Damage estimate	Deaths	Injuries	On record for
22 Aug 2021	Flash Flood	not recorded	none	0	0	County
22 Aug 2021	Flash Flood	not recorded	none	0	0	County
22 Aug 2021	Flash Flood	not recorded	none	0	0	County
22 Aug 2021	Flash Flood	not recorded	none	0	0	County
17 Jul 2021	Flash Flood	not recorded	none	0	0	County
17 Jul 2021	Flash Flood	not recorded	none	0	0	County
24 Jul 2020	Flash Flood	not recorded	none	0	0	County
22 Jul 2019	Flash Flood	not recorded	none	0	0	County
22 Jul 2019	Flash Flood	not recorded	none	0	0	County
22 Jul 2019	Flash Flood	not recorded	none	0	0	County
18 Jul 2019	Flash Flood	not recorded	none	0	0	County
18 Jul 2019	Flash Flood	not recorded	none	0	0	County
18 Jul 2019	Flash Flood	not recorded	none	0	0	County
17 Jul 2019	Flash Flood	not recorded	none	0	0	County
18 Jun 2019	Flash Flood	not recorded	none	0	0	County
30 May 2019	Flash Flood	not recorded	none	0	0	County
17 Aug 2018	Flash Flood	not recorded	none	0	0	County
11 Aug 2018	Flash Flood	not recorded	none	0	0	County
4 Aug 2018	Flash Flood	not recorded	none	0	0	County
4 Aug 2018	Flash Flood	not recorded	none	0	0	County
27 May 2018	Flash Flood	not recorded	none	0	0	County
16 Apr 2018	Flood	not recorded	none	0	0	County
16 Apr 2018	Flood	not recorded	none	0	0	County
16 Apr 2018	Flood	not recorded	none	0	0	County
3 Mar 2018	Flood	not recorded	none	0	0	County
29 Oct 2017	Flood	not recorded	$20	0	0	County
22 Aug 2017	Flood	not recorded	none	0	0	County
22 Aug 2017	Flood	not recorded	none	0	0	County
22 Jul 2017	Flood	not recorded	none	0	0	County
24 Jun 2017	Flood	not recorded	none	0	0	County
31 Mar 2017	Flood	not recorded	none	0	0	County
31 Jul 2016	Flash Flood	not recorded	none	0	0	County
25 Jul 2016	Flood	not recorded	none	0	0	County
8 Jul 2016	Flood	not recorded	none	0	0	County
24 Feb 2016	Flash Flood	not recorded	none	0	0	County
19 Aug 2015	Flash Flood	not recorded	$10 thousand	0	0	County
19 Aug 2015	Flood	not recorded	none	0	0	County
31 May 2015	Flash Flood	not recorded	$50 thousand	0	0	County
14 Mar 2015	Flood	not recorded	none	0	0	County
11 Mar 2015	Flood	not recorded	none	0	0	County
18 Jan 2015	Flood	not recorded	none	0	0	County
9 Dec 2014	Flood	not recorded	none	0	0	County
21 Aug 2014	Flash Flood	not recorded	none	0	0	County
16 Jul 2014	Flood	not recorded	none	0	0	County
3 Jul 2014	Flash Flood	not recorded	none	0	0	County
1 May 2014	Flood	not recorded	$1.0 million	0	0	County
30 Apr 2014	Flood	not recorded	$1.0 million	0	0	County
15 Apr 2014	Flood	not recorded	none	0	0	County
1 Apr 2014	Flood	not recorded	none	0	0	County
30 Mar 2014	Flood	not recorded	none	0	0	County
22 Feb 2014	Flood	not recorded	none	0	0	County
6 Jan 2014	Flood	not recorded	none	0	0	County
22 Aug 2013	Flash Flood	not recorded	$50 thousand	0	0	County
22 Aug 2013	Flash Flood	not recorded	none	0	0	County
22 Aug 2013	Flood	not recorded	none	0	0	County
28 Jul 2013	Flash Flood	not recorded	none	0	0	County
28 Jul 2013	Flood	not recorded	none	0	0	County
1 Jul 2013	Flash Flood	not recorded	none	0	0	County
27 Jun 2013	Flash Flood	not recorded	none	0	0	County
27 Jun 2013	Flood	not recorded	none	0	0	County
14 Jun 2013	Flood	not recorded	none	0	0	County
10 Jun 2013	Flood	not recorded	none	0	0	County
7 Jun 2013	Flood	not recorded	none	0	0	County
27 Dec 2012	Flood	not recorded	none	0	0	County
21 Dec 2012	Flood	not recorded	none	0	0	County
1 Aug 2012	Flash Flood	not recorded	none	0	0	County
1 Aug 2012	Flash Flood	not recorded	none	0	0	County
23 Apr 2012	Flood	not recorded	none	0	0	County
12 Jan 2012	Flood	not recorded	none	0	0	County
12 Jan 2012	Flood	not recorded	none	0	0	County
7 Dec 2011	Flood	not recorded	none	0	0	County
23 Nov 2011	Flood	not recorded	none	0	0	County
28 Sep 2011	Flood	not recorded	none	0	0	County
6 Sep 2011	Flood	not recorded	$1.0 million	0	0	County
28 Aug 2011	Flood	not recorded	$200 million	0	0	County
27 Aug 2011	Flash Flood	not recorded	none	0	0	County
22 Aug 2011	Flood	not recorded	none	0	0	County
14 Aug 2011	Flash Flood	not recorded	none	0	0	County
14 Aug 2011	Flood	not recorded	none	0	0	County
9 Aug 2011	Flash Flood	not recorded	none	0	0	County
16 Apr 2011	Flood	not recorded	none	0	0	County
10 Mar 2011	Flood	not recorded	none	0	0	County
6 Mar 2011	Flood	not recorded	none	0	0	County
25 Feb 2011	Flood	not recorded	none	0	0	County
1 Oct 2010	Flood	not recorded	none	0	0	County
1 Apr 2010	Flood	not recorded	none	0	0	County
29 Mar 2010	Flood	not recorded	none	0	0	County
23 Mar 2010	Flood	not recorded	none	0	0	County
13 Mar 2010	Flood	not recorded	$15 million	0	0	County
24 Feb 2010	Flood	not recorded	none	0	0	County
25 Jan 2010	Flood	not recorded	none	0	0	County
26 Dec 2009	Flood	not recorded	none	0	0	County
9 Dec 2009	Flood	not recorded	none	0	0	County
28 Oct 2009	Flood	not recorded	none	0	0	County
25 Oct 2009	Flood	not recorded	none	0	0	County
15 Apr 2007	Flood	not recorded	$48 million	0	0	County
12 Oct 2005	Flash Flood	not recorded	none	0	0	County
9 Oct 2005	Flood	not recorded	none	0	0	Forecast zone
8 Oct 2005	Flash Flood	not recorded	none	0	0	County
14 Sep 2005	Flash Flood	not recorded	none	0	0	County
2 Apr 2005	Flood	not recorded	none	0	0	Forecast zone
28 Mar 2005	Flood	not recorded	none	0	0	Forecast zone
15 Feb 2005	Flood	not recorded	none	0	0	Forecast zone
14 Jan 2005	Flood	not recorded	none	0	0	Forecast zone
1 Dec 2004	Flood	not recorded	none	0	0	Forecast zone
28 Nov 2004	Flood	not recorded	none	0	0	Forecast zone
29 Sep 2004	Flood	not recorded	none	0	0	Forecast zone
28 Sep 2004	Flash Flood	not recorded	none	0	0	County
27 Jul 2004	Flash Flood	not recorded	none	0	0	County
24 Jul 2004	Flood	not recorded	none	0	0	Forecast zone
23 Jul 2004	Flash Flood	not recorded	none	0	0	County
14 Jul 2004	Flash Flood	not recorded	none	0	0	County
27 Apr 2004	Flood	not recorded	none	0	0	Forecast zone
13 Apr 2004	Flood	not recorded	none	0	0	Forecast zone
6 Feb 2004	Flood	not recorded	none	0	0	Forecast zone
24 Dec 2003	Flood	not recorded	none	0	0	Forecast zone
17 Dec 2003	Flood	not recorded	none	0	0	Forecast zone
14 Dec 2003	Flood	not recorded	none	0	0	Forecast zone
11 Dec 2003	Flood	not recorded	none	0	0	Forecast zone
19 Nov 2003	Flood	not recorded	none	0	0	Forecast zone
29 Oct 2003	Flood	not recorded	none	0	0	Forecast zone
27 Oct 2003	Flood	not recorded	none	0	0	Forecast zone
5 Aug 2003	Flash Flood	not recorded	none	0	0	County
21 Jun 2003	Flood	not recorded	none	0	0	Forecast zone
4 Jun 2003	Flood	not recorded	none	0	0	Forecast zone
26 May 2003	Flood	not recorded	none	0	0	Forecast zone
21 Mar 2003	Flood	not recorded	none	0	0	Forecast zone
6 Mar 2003	Flood	not recorded	none	0	0	Forecast zone
2 Mar 2003	Flood	not recorded	none	0	0	Forecast zone
22 Feb 2003	Flood	not recorded	none	0	0	Forecast zone
1 Jan 2003	Flood	not recorded	none	0	0	Forecast zone
25 Dec 2002	Flood	not recorded	none	0	0	Forecast zone
13 Dec 2002	Flood	not recorded	none	0	0	Forecast zone
13 Dec 2002	Flood	not recorded	none	0	0	Forecast zone
17 Nov 2002	Flash Flood	not recorded	none	0	0	County
19 Jul 2002	Flood	not recorded	none	0	0	County
17 Jun 2001	Flash Flood	not recorded	none	0	0	County
2 Jun 2001	Flood	not recorded	none	0	0	Forecast zone
30 Mar 2001	Flood	not recorded	none	0	0	Forecast zone
17 Dec 2000	Flash Flood	not recorded	none	0	0	County
1 Sep 2000	Flash Flood	not recorded	none	0	0	County
27 Aug 2000	Flash Flood	not recorded	none	0	0	County
12 Aug 2000	Flash Flood	not recorded	none	0	0	County
16 Sep 1999	Flash Flood	not recorded	$358 million	2	100	County
22 Mar 1999	Flash Flood	not recorded	none	0	0	County
19 Jan 1999	Flood	not recorded	none	0	0	Forecast zone
10 May 1998	Flood	not recorded	none	0	0	Forecast zone
10 Apr 1998	Flood	not recorded	none	0	0	Forecast zone
1 Apr 1998	Flash Flood	not recorded	none	0	0	County
24 Jan 1998	Flood	not recorded	none	0	0	Forecast zone
24 Jul 1997	Flash Flood	not recorded	none	0	0	County
25 Jan 1997	Flood	not recorded	none	0	0	Forecast zone
14 Dec 1996	Flood	not recorded	none	0	0	Forecast zone
8 Dec 1996	Flood	not recorded	none	0	0	Forecast zone
7 Dec 1996	Flash Flood	not recorded	none	0	0	County
2 Dec 1996	Flood	not recorded	none	0	0	Forecast zone
19 Oct 1996	Flash Flood	not recorded	$31 million	0	0	County
19 Oct 1996	Flood	not recorded	none	0	0	Forecast zone
19 Jun 1996	Flash Flood	not recorded	none	0	0	County
27 Jan 1996	Flood	not recorded	none	0	0	Forecast zone
19 Jan 1996	Flood	not recorded	$250 thousand	0	0	Forecast zone
19 Jan 1996	Flash Flood	not recorded	none	0	0	County

The site keeps 187 of the 221 events for this page. It keeps the newest 120 events. It also keeps 80 events with the most damage, injuries or deaths. A damage figure is an estimate in the NCEI record.

Official channels

NCEI Storm Events Database (opens in a new tab)Search the full NCEI record by state, county and date.
National Weather Service: Philadelphia/Mt Holly (opens in a new tab)The forecast office that issues the weather warnings for the county.
FEMA Flood Map Service Center: Search By Address (opens in a new tab)Search an address to see its flood map. This site has no flood-zone data.

These links open the pages of the agencies. The site checked the links on 2 Oct 2026.

Cite this page

County Hazards. "Flood events on record for Somerset County, New Jersey". https://countyhazards.com/county/nj/somerset/flood/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026. Page made on 2 Oct 2026.

Questions

Which month has the most flood events on record for Somerset County?: July has 39 of the 221 flood events on record from 1996 through 30 Jun 2026.
How many flood events are on record for New Jersey?: NCEI has 3,787 flood events on record for New Jersey from 1996 through 30 Jun 2026. That count has every forecast zone of the state.
How does Somerset County compare with the other counties of New Jersey?: The counties of New Jersey have 41.0 flood events for each 100 square miles. Somerset County has 73.2.
Why are some flood events on record for a forecast zone?: NCEI records some event types for a National Weather Service forecast zone and not for a county. This page counts a zone event when the zone has the name of the county.