Washington Channel at SW Waterfront (IN MLLW)

Last updated: Apr 4, 2025, 8:17 AM UTC

No watches, warnings or advisories are in effect for this area.

Upstream gauge unavailable

Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.

No secondary data available. Transformations for Flow data and a secondary Y axis cannot be made at this time.

National Ocean Service

Scale to Flood Categories

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Traces and Thresholds Click to turn on/off display

Observed (OBS) 04/04/2025 3:48 AM EDT

Official Forecast (FCST) 04/03/2025 10:11 AM EDT

Record: 11.1 ft

CATEGORY STAGE

Major Flooding 7 ft

Moderate Flooding 5.3 ft

Minor Flooding 4.2 ft

Action 3.7 ft

Reliability of the Forecast:

NOTE: Forecasts are issued routinely year-round.

Caution: This water level forecast does not fully account for the effects of wind driven storm surge. Forecast errors of two feet or more are possible during major surge events. Other sources of error may include rainfall forecast uncertainties and hydrologic/hydraulic model uncertainties.
Gauge reading affected by tides.
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	CATEGORY	STAGE
	Major Flooding	7 ft
	Moderate Flooding	5.3 ft
	Minor Flooding	4.2 ft
	Action	3.7 ft

Flood Impacts 🅘

15 - Floodwaters approach the Pentagon East parking area, especially during a freshwater flood. Most of the Reagan National Airport runways are flooded. In a tidal flood, water covers portions of the economy parking at Reagan National Airport, and approaches nearby structures. Water approaches Arnold Avenue at Joint Base Anacostia Bolling. A tidal flood at this height could cause even more widespread flooding of the Base. Most of Fort McNair is flooded.
12 - Widespread flooding is occurring. Only a few high spots remain dry in East Potomac Park, and around the tidal basin. Floodwaters on Fort McNair go all the way up 5th Avenue. Near the Navy Yard, floodwaters cover past M Street SE. Some runways and taxiways at Reagan National Airport are partially flooded.
11 - Floodwaters reach both ends of the north-south runway at Reagan National Airport, and covers some taxiways. The George Washington Parkway is flooded in multiple locations between Arlington National Cemetery and the Airport. Floodwaters approach the back side of a business on the north side of Maine Avenue near I-395. Also, widespread flooding is occurring on the Anacostia, with water on the Navy Yard up to M Street SE.

Gauge Info

Coordinates	38.8733, -77.0211
RFC	MARFC
State	DC
WFO	LWX
County	District of Columbia
Data Provider(s)
National Ocean Service	National Ocean Service

Gauge Location

Current Stage:

undefined undefined at undefined UTC

Highest Forecast: undefined undefined

Current Mouse Location

Latitude:

Longitude:

Not selected

Recent Crests

1.	5.83 ft	on 09-24-2023	(P)
2.	5.48 ft	on 05-09-2022	(P)
3.	5.47 ft	on 01-17-2022	(P)
4.	7.12 ft	on 10-29-2021	(P)
5.	5.19 ft	on 05-01-2020	(P)

Historic Crests

1.	11.05 ft	on 10-17-1942
2.	10.55 ft	on 03-19-1936
3.	10.26 ft	on 09-19-2003
4.	9.95 ft	on 08-23-1933
5.	8.68 ft	on 06-24-1972

Vertical Datum Table

type	MLLW*
major Flooding	7.00 ft
moderate Flooding	5.30 ft
minor Flooding	4.20 ft
action	3.70 ft
Latest Value	2.40 ft
Gauge Zero	0.00 ft

Gauge Photos

No Images Found

Probability Information

No Images Available

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

Resources

Hydrologic Resource Links

Additional Resource Links

WFO Information

Weather Forecast Office

(Baltimore/Washington) Sterling

43858 Weather Service Rd.

Sterling, VA 20166

(571) 888-3500

Ask Questions/Webmaster

Official Homepage

1.	5.83 ft	on 09-24-2023	(P)
2.	5.48 ft	on 05-09-2022	(P)
3.	5.47 ft	on 01-17-2022	(P)
4.	7.12 ft	on 10-29-2021	(P)
5.	5.19 ft	on 05-01-2020	(P)
6.	5.17 ft	on 04-30-2020	(P)
7.	4.98 ft	on 04-05-2020	(P)
8.	5.05 ft	on 04-05-2020	(P)
9.	5.52 ft	on 11-01-2019	(P)
10.	5.61 ft	on 10-12-2019	(P)
11.	5.65 ft	on 10-12-2019	(P)
12.	5.03 ft	on 10-11-2019	(P)
13.	5.05 ft	on 09-08-2019	(P)
14.	5.11 ft	on 08-27-2019	(P)
15.	5.42 ft	on 12-21-2018
16.	5.82 ft	on 12-17-2018
17.	5.39 ft	on 11-27-2018
18.	4.74 ft	on 10-10-2018
19.	5.71 ft	on 09-30-2018
20.	5.30 ft	on 09-29-2018
21.	5.36 ft	on 09-21-2018
22.	5.98 ft	on 09-12-2018
23.	5.31 ft	on 09-12-2018
24.	6.15 ft	on 09-11-2018
25.	6.43 ft	on 09-11-2018
26.	6.40 ft	on 09-10-2018
27.	5.99 ft	on 09-10-2018
28.	5.72 ft	on 06-05-2018
29.	6.12 ft	on 06-05-2018
30.	5.39 ft	on 05-19-2018
31.	4.50 ft	on 04-17-2018
32.	5.20 ft	on 04-16-2018
33.	5.30 ft	on 03-07-2018
34.	5.49 ft	on 03-07-2018
35.	4.93 ft	on 03-06-2018
36.	4.87 ft	on 01-23-2017
37.	5.70 ft	on 02-25-2016
38.	5.38 ft	on 02-10-2016
39.	5.18 ft	on 10-29-2015
40.	5.29 ft	on 10-05-2015
41.	5.41 ft	on 10-04-2015
42.	4.70 ft	on 08-11-2015
43.	4.84 ft	on 06-27-2015
44.	4.93 ft	on 04-20-2015
45.	5.64 ft	on 05-16-2014
46.	4.77 ft	on 12-21-2012
47.	6.12 ft	on 10-30-2012
48.	5.28 ft	on 06-06-2012
49.	5.29 ft	on 10-13-2011
50.	4.95 ft	on 09-29-2011
51.	5.15 ft	on 09-08-2011
52.	5.49 ft	on 05-19-2011
53.	4.81 ft	on 05-14-2011
54.	5.14 ft	on 05-12-2011
55.	5.75 ft	on 04-16-2011
56.	5.35 ft	on 03-10-2011
57.	4.78 ft	on 10-01-2010
58.	4.99 ft	on 08-13-2010
59.	4.84 ft	on 03-29-2010
60.	6.58 ft	on 03-14-2010
61.	5.28 ft	on 01-25-2010
62.	5.03 ft	on 12-26-2009
63.	4.93 ft	on 09-18-2009
64.	4.97 ft	on 06-18-2009
65.	4.78 ft	on 10-21-2008
66.	4.88 ft	on 09-27-2008
67.	5.57 ft	on 05-14-2008
68.	4.79 ft	on 04-21-2008
69.	4.90 ft	on 06-14-2007
70.	4.74 ft	on 04-19-2007
71.	5.46 ft	on 11-16-2006
72.	5.02 ft	on 10-07-2006
73.	4.80 ft	on 09-13-2006
74.	6.68 ft	on 09-02-2006
75.	4.93 ft	on 02-03-2006
76.	4.75 ft	on 01-04-2006
77.	5.22 ft	on 07-08-2005
78.	4.73 ft	on 05-25-2005
79.	5.31 ft	on 04-02-2005
80.	5.00 ft	on 03-28-2005
81.	4.80 ft	on 12-11-2004
82.	5.71 ft	on 09-23-2003
83.	10.26 ft	on 09-19-2003
84.	4.87 ft	on 05-18-2003
85.	5.11 ft	on 04-11-2003
86.	5.31 ft	on 03-20-2003
87.	4.81 ft	on 01-03-2003
88.	5.21 ft	on 09-06-1999
89.	5.05 ft	on 05-14-1998
90.	5.47 ft	on 03-21-1998
91.	5.28 ft	on 03-09-1998
92.	4.73 ft	on 02-28-1998
93.	5.19 ft	on 02-17-1998
94.	6.09 ft	on 02-06-1998
95.	5.87 ft	on 01-30-1998
96.	4.95 ft	on 01-23-1998
97.	5.21 ft	on 11-09-1997
98.	4.80 ft	on 06-05-1997
99.	8.16 ft	on 09-09-1996
100.	7.87 ft	on 09-06-1996
101.	4.95 ft	on 03-19-1996
102.	8.09 ft	on 01-21-1996
103.	5.04 ft	on 08-20-1995
104.	4.82 ft	on 08-08-1995
105.	4.75 ft	on 03-30-1994
106.	5.26 ft	on 11-28-1993
107.	5.76 ft	on 03-05-1993
108.	5.32 ft	on 12-10-1992
109.	5.10 ft	on 11-01-1991
110.	4.83 ft	on 04-14-1988
111.	4.90 ft	on 04-28-1987
112.	5.26 ft	on 04-17-1987
113.	4.97 ft	on 03-31-1987
114.	5.55 ft	on 12-02-1986
115.	4.69 ft	on 04-21-1986
116.	7.86 ft	on 11-07-1985
117.	8.14 ft	on 11-04-1985
118.	5.09 ft	on 11-01-1985
119.	5.11 ft	on 02-12-1985
120.	4.83 ft	on 04-17-1984
121.	4.89 ft	on 04-16-1984
122.	5.38 ft	on 03-29-1984
123.	5.74 ft	on 02-16-1984
124.	4.95 ft	on 04-03-1983
125.	5.22 ft	on 03-28-1983
126.	5.45 ft	on 03-19-1983
127.	4.84 ft	on 09-27-1982
128.	5.05 ft	on 06-13-1982
129.	4.75 ft	on 01-19-1980
130.	4.79 ft	on 10-12-1979
131.	6.09 ft	on 09-06-1979
132.	7.16 ft	on 02-26-1979
133.	4.70 ft	on 01-24-1979
134.	6.15 ft	on 01-26-1978
135.	4.94 ft	on 12-20-1977
136.	4.89 ft	on 11-09-1977
137.	4.78 ft	on 09-26-1977
138.	4.79 ft	on 01-02-1976
139.	6.22 ft	on 09-26-1975
140.	4.76 ft	on 03-19-1975
141.	5.27 ft	on 12-02-1974
142.	7.42 ft	on 12-01-1974
143.	4.92 ft	on 04-27-1973
144.	4.85 ft	on 12-24-1972
145.	4.95 ft	on 12-22-1972
146.	8.68 ft	on 06-24-1972
147.	6.71 ft	on 06-22-1972
148.	4.95 ft	on 10-25-1971
149.	4.75 ft	on 10-02-1971
150.	4.74 ft	on 11-14-1970
151.	5.06 ft	on 04-02-1970
152.	4.80 ft	on 05-27-1968
153.	4.59 ft	on 11-28-1966
154.	4.81 ft	on 09-14-1966
155.	5.45 ft	on 11-10-1962
156.	4.95 ft	on 03-23-1962
157.	5.95 ft	on 03-08-1962
158.	5.05 ft	on 10-24-1961
159.	4.75 ft	on 04-16-1961
160.	4.95 ft	on 04-13-1961
161.	4.75 ft	on 04-06-1958
162.	5.15 ft	on 08-21-1955
163.	6.15 ft	on 08-18-1955
164.	5.25 ft	on 08-13-1955
165.	7.75 ft	on 10-15-1954
166.	4.75 ft	on 10-24-1953
167.	4.75 ft	on 01-24-1953
168.	5.45 ft	on 11-22-1952
169.	5.35 ft	on 11-21-1952
170.	5.65 ft	on 09-01-1952
171.	5.35 ft	on 03-14-1951
172.	5.25 ft	on 11-25-1950
173.	5.15 ft	on 09-13-1950
174.	4.85 ft	on 05-07-1948
175.	5.05 ft	on 11-03-1947
176.	5.15 ft	on 09-19-1945
177.	5.35 ft	on 09-18-1945
178.	11.05 ft	on 10-17-1942
179.	8.65 ft	on 04-28-1937
180.	6.45 ft	on 04-26-1937
181.	10.55 ft	on 03-19-1936
182.	4.85 ft	on 06-19-1934
183.	9.95 ft	on 08-23-1933
184.	5.35 ft	on 01-27-1933
185.	5.05 ft	on 11-09-1932

1.	11.05 ft	on 10-17-1942
2.	10.55 ft	on 03-19-1936
3.	10.26 ft	on 09-19-2003
4.	9.95 ft	on 08-23-1933
5.	8.68 ft	on 06-24-1972
6.	8.65 ft	on 04-28-1937
7.	8.16 ft	on 09-09-1996
8.	8.14 ft	on 11-04-1985
9.	8.09 ft	on 01-21-1996
10.	7.87 ft	on 09-06-1996
11.	7.86 ft	on 11-07-1985
12.	7.75 ft	on 10-15-1954
13.	7.42 ft	on 12-01-1974
14.	7.16 ft	on 02-26-1979
15.	7.12 ft	on 10-29-2021	(P)
16.	6.71 ft	on 06-22-1972
17.	6.68 ft	on 09-02-2006
18.	6.58 ft	on 03-14-2010
19.	6.45 ft	on 04-26-1937
20.	6.43 ft	on 09-11-2018
21.	6.40 ft	on 09-10-2018
22.	6.22 ft	on 09-26-1975
23.	6.15 ft	on 01-26-1978
24.	6.15 ft	on 09-11-2018
25.	6.15 ft	on 08-18-1955
26.	6.12 ft	on 06-05-2018
27.	6.12 ft	on 10-30-2012
28.	6.09 ft	on 09-06-1979
29.	6.09 ft	on 02-06-1998
30.	5.99 ft	on 09-10-2018
31.	5.98 ft	on 09-12-2018
32.	5.95 ft	on 03-08-1962
33.	5.87 ft	on 01-30-1998
34.	5.83 ft	on 09-24-2023	(P)
35.	5.82 ft	on 12-17-2018
36.	5.76 ft	on 03-05-1993
37.	5.75 ft	on 04-16-2011
38.	5.74 ft	on 02-16-1984
39.	5.72 ft	on 06-05-2018
40.	5.71 ft	on 09-23-2003
41.	5.71 ft	on 09-30-2018
42.	5.70 ft	on 02-25-2016
43.	5.65 ft	on 10-12-2019	(P)
44.	5.65 ft	on 09-01-1952
45.	5.64 ft	on 05-16-2014
46.	5.61 ft	on 10-12-2019	(P)
47.	5.57 ft	on 05-14-2008
48.	5.55 ft	on 12-02-1986
49.	5.52 ft	on 11-01-2019	(P)
50.	5.49 ft	on 03-07-2018
51.	5.49 ft	on 05-19-2011
52.	5.48 ft	on 05-09-2022	(P)
53.	5.47 ft	on 03-21-1998
54.	5.47 ft	on 01-17-2022	(P)
55.	5.46 ft	on 11-16-2006
56.	5.45 ft	on 11-10-1962
57.	5.45 ft	on 03-19-1983
58.	5.45 ft	on 11-22-1952
59.	5.42 ft	on 12-21-2018
60.	5.41 ft	on 10-04-2015
61.	5.39 ft	on 05-19-2018
62.	5.39 ft	on 11-27-2018
63.	5.38 ft	on 03-29-1984
64.	5.38 ft	on 02-10-2016
65.	5.36 ft	on 09-21-2018
66.	5.35 ft	on 01-27-1933
67.	5.35 ft	on 03-10-2011
68.	5.35 ft	on 11-21-1952
69.	5.35 ft	on 03-14-1951
70.	5.35 ft	on 09-18-1945
71.	5.32 ft	on 12-10-1992
72.	5.31 ft	on 03-20-2003
73.	5.31 ft	on 09-12-2018
74.	5.31 ft	on 04-02-2005
75.	5.30 ft	on 09-29-2018
76.	5.30 ft	on 03-07-2018
77.	5.29 ft	on 10-13-2011
78.	5.29 ft	on 10-05-2015
79.	5.28 ft	on 06-06-2012
80.	5.28 ft	on 03-09-1998
81.	5.28 ft	on 01-25-2010
82.	5.27 ft	on 12-02-1974
83.	5.26 ft	on 04-17-1987
84.	5.26 ft	on 11-28-1993
85.	5.25 ft	on 08-13-1955
86.	5.25 ft	on 11-25-1950
87.	5.22 ft	on 07-08-2005
88.	5.22 ft	on 03-28-1983
89.	5.21 ft	on 09-06-1999
90.	5.21 ft	on 11-09-1997
91.	5.20 ft	on 04-16-2018
92.	5.19 ft	on 05-01-2020	(P)
93.	5.19 ft	on 02-17-1998
94.	5.18 ft	on 10-29-2015
95.	5.17 ft	on 04-30-2020	(P)
96.	5.15 ft	on 08-21-1955
97.	5.15 ft	on 09-08-2011
98.	5.15 ft	on 09-13-1950
99.	5.15 ft	on 09-19-1945
100.	5.14 ft	on 05-12-2011
101.	5.11 ft	on 08-27-2019	(P)
102.	5.11 ft	on 04-11-2003
103.	5.11 ft	on 02-12-1985
104.	5.10 ft	on 11-01-1991
105.	5.09 ft	on 11-01-1985
106.	5.06 ft	on 04-02-1970
107.	5.05 ft	on 11-09-1932
108.	5.05 ft	on 10-24-1961
109.	5.05 ft	on 06-13-1982
110.	5.05 ft	on 09-08-2019	(P)
111.	5.05 ft	on 04-05-2020	(P)
112.	5.05 ft	on 05-14-1998
113.	5.05 ft	on 11-03-1947
114.	5.04 ft	on 08-20-1995
115.	5.03 ft	on 10-11-2019	(P)
116.	5.03 ft	on 12-26-2009
117.	5.02 ft	on 10-07-2006
118.	5.00 ft	on 03-28-2005
119.	4.99 ft	on 08-13-2010
120.	4.98 ft	on 04-05-2020	(P)
121.	4.97 ft	on 06-18-2009
122.	4.97 ft	on 03-31-1987
123.	4.95 ft	on 03-23-1962
124.	4.95 ft	on 04-13-1961
125.	4.95 ft	on 12-22-1972
126.	4.95 ft	on 09-29-2011
127.	4.95 ft	on 01-23-1998
128.	4.95 ft	on 03-19-1996
129.	4.95 ft	on 04-03-1983
130.	4.95 ft	on 10-25-1971
131.	4.94 ft	on 12-20-1977
132.	4.93 ft	on 03-06-2018
133.	4.93 ft	on 04-20-2015
134.	4.93 ft	on 09-18-2009
135.	4.93 ft	on 02-03-2006
136.	4.92 ft	on 04-27-1973
137.	4.90 ft	on 04-28-1987
138.	4.90 ft	on 06-14-2007
139.	4.89 ft	on 04-16-1984
140.	4.89 ft	on 11-09-1977
141.	4.88 ft	on 09-27-2008
142.	4.87 ft	on 05-18-2003
143.	4.87 ft	on 01-23-2017
144.	4.85 ft	on 05-07-1948
145.	4.85 ft	on 12-24-1972
146.	4.85 ft	on 06-19-1934
147.	4.84 ft	on 03-29-2010
148.	4.84 ft	on 09-27-1982
149.	4.84 ft	on 06-27-2015
150.	4.83 ft	on 04-14-1988
151.	4.83 ft	on 04-17-1984
152.	4.82 ft	on 08-08-1995
153.	4.81 ft	on 09-14-1966
154.	4.81 ft	on 01-03-2003
155.	4.81 ft	on 05-14-2011
156.	4.80 ft	on 09-13-2006
157.	4.80 ft	on 12-11-2004
158.	4.80 ft	on 06-05-1997
159.	4.80 ft	on 05-27-1968
160.	4.79 ft	on 01-02-1976
161.	4.79 ft	on 04-21-2008
162.	4.79 ft	on 10-12-1979
163.	4.78 ft	on 10-21-2008
164.	4.78 ft	on 10-01-2010
165.	4.78 ft	on 09-26-1977
166.	4.77 ft	on 12-21-2012
167.	4.76 ft	on 03-19-1975
168.	4.75 ft	on 04-16-1961
169.	4.75 ft	on 04-06-1958
170.	4.75 ft	on 10-24-1953
171.	4.75 ft	on 01-24-1953
172.	4.75 ft	on 10-02-1971
173.	4.75 ft	on 03-30-1994
174.	4.75 ft	on 01-19-1980
175.	4.75 ft	on 01-04-2006
176.	4.74 ft	on 04-19-2007
177.	4.74 ft	on 10-10-2018
178.	4.74 ft	on 11-14-1970
179.	4.73 ft	on 05-25-2005
180.	4.73 ft	on 02-28-1998
181.	4.70 ft	on 01-24-1979
182.	4.70 ft	on 08-11-2015
183.	4.69 ft	on 04-21-1986
184.	4.59 ft	on 11-28-1966
185.	4.50 ft	on 04-17-2018