Siuslaw River near Mapleton

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

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US Geological Survey
Observations courtesy of U.S. Geological Survey

Scale to Flood Categories

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Observed (OBS) 04/04/2025 1:00 AM PDT

Official Forecast (FCST) 04/03/2025 3:07 PM PDT

Record: 30.2 ft

CATEGORY STAGE

Major Flooding 28 ft

Moderate Flooding 22 ft

Minor Flooding 18 ft

Action 15 ft

Reliability of the Forecast:

NOTE: Forecasts are issued routinely year-round.
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	CATEGORY	STAGE
	Major Flooding	28 ft
	Moderate Flooding	22 ft
	Minor Flooding	18 ft
	Action	15 ft

Flood Impacts 🅘

32.5 - the flow at this level is about 62,000 cfs and has a 1 percent chance of happening in a given year (aka 100-year flood).
30.6 - the flow at this level is about 56,000 cfs and has a 2 percent chance of happening in a given year (aka 50-year flood).
28 - expect major flooding along Riverview Avenue area and numerous homes and businesses in Mapleton. Flooding of roads adjacent to the Siuslaw River in the vicinity of Mapleton is likely. Flooding of Highways 126 and 36 will be significant.

Gauge Info

Coordinates	44.0633, -123.883
RFC	NWRFC
State	OR
WFO	PQR
County	Lane
Data Provider(s)
US Geological Survey	USGS--Water Resources of the United States
USGS	14307620

Gauge Location

Recent Crests

1.	18.87 ft	on 03-16-2025	(P)
2.	19.73 ft	on 04-08-2019
3.	22.36 ft	on 12-18-2015
4.	18.36 ft	on 12-07-2015
5.	22.80 ft	on 12-21-2014

Historic Crests

1.	30.21 ft	on 02-07-1996
2.	28.45 ft	on 01-21-1972
3.	28.28 ft	on 01-16-1974
4.	28.07 ft	on 01-19-2012
5.	28.00 ft	on 12-16-1964

Gauge Photos

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Probability Information

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Weekly Chance of Exceeding Levels
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Chance of Exceeding Levels During Entire Period
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Unique Local Info

10-day Forecast/Trend, Northwest River Forecast Center

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

WFO Information

Weather Forecast Office

Portland

5241 NE 122nd Avenue

Portland, OR 97230-1089

(503) 261-9246

Ask Questions/Webmaster

Official Homepage

1.	18.87 ft	on 03-16-2025	(P)
2.	19.73 ft	on 04-08-2019
3.	22.36 ft	on 12-18-2015
4.	18.36 ft	on 12-07-2015
5.	22.80 ft	on 12-21-2014
6.	18.02 ft	on 02-12-2014
7.	18.27 ft	on 11-19-2012
8.	20.39 ft	on 03-30-2012
9.	28.07 ft	on 01-19-2012
10.	18.42 ft	on 12-28-2008
11.	21.48 ft	on 12-04-2007
12.	18.75 ft	on 11-07-2006
13.	20.48 ft	on 01-18-2006
14.	22.69 ft	on 01-11-2006
15.	23.98 ft	on 12-30-2005
16.	19.67 ft	on 12-28-2005
17.	18.35 ft	on 12-13-2003
18.	20.12 ft	on 12-31-2002
19.	21.87 ft	on 11-26-1999
20.	25.79 ft	on 12-28-1998
21.	20.64 ft	on 12-02-1998
22.	30.21 ft	on 02-07-1996
23.	21.60 ft	on 01-14-1995
24.	18.49 ft	on 01-07-1990
25.	18.86 ft	on 01-15-1988
26.	18.91 ft	on 01-10-1988
27.	20.19 ft	on 12-10-1987
28.	23.01 ft	on 02-23-1986
29.	22.35 ft	on 02-13-1984
30.	18.60 ft	on 02-18-1983
31.	22.75 ft	on 12-16-1982
32.	21.08 ft	on 01-23-1982
33.	23.67 ft	on 12-06-1981
34.	25.73 ft	on 12-25-1980
35.	21.13 ft	on 12-02-1980
36.	22.70 ft	on 01-06-1978
37.	23.99 ft	on 12-13-1977
38.	21.67 ft	on 11-25-1977
39.	18.37 ft	on 01-06-1977
40.	23.58 ft	on 01-08-1976
41.	21.20 ft	on 12-04-1975
42.	28.28 ft	on 01-16-1974
43.	21.32 ft	on 12-21-1973
44.	21.77 ft	on 11-15-1973
45.	20.19 ft	on 03-02-1972
46.	28.45 ft	on 01-21-1972
47.	18.78 ft	on 11-26-1971
48.	22.63 ft	on 01-17-1971
49.	22.93 ft	on 01-27-1970
50.	19.94 ft	on 01-23-1970
51.	19.04 ft	on 12-10-1968
52.	22.63 ft	on 12-04-1968
53.	28.00 ft	on 12-16-1964

1.	30.21 ft	on 02-07-1996
2.	28.45 ft	on 01-21-1972
3.	28.28 ft	on 01-16-1974
4.	28.07 ft	on 01-19-2012
5.	28.00 ft	on 12-16-1964
6.	25.79 ft	on 12-28-1998
7.	25.73 ft	on 12-25-1980
8.	23.99 ft	on 12-13-1977
9.	23.98 ft	on 12-30-2005
10.	23.67 ft	on 12-06-1981
11.	23.58 ft	on 01-08-1976
12.	23.01 ft	on 02-23-1986
13.	22.93 ft	on 01-27-1970
14.	22.80 ft	on 12-21-2014
15.	22.75 ft	on 12-16-1982
16.	22.70 ft	on 01-06-1978
17.	22.69 ft	on 01-11-2006
18.	22.63 ft	on 01-17-1971
19.	22.63 ft	on 12-04-1968
20.	22.36 ft	on 12-18-2015
21.	22.35 ft	on 02-13-1984
22.	21.87 ft	on 11-26-1999
23.	21.77 ft	on 11-15-1973
24.	21.67 ft	on 11-25-1977
25.	21.60 ft	on 01-14-1995
26.	21.48 ft	on 12-04-2007
27.	21.32 ft	on 12-21-1973
28.	21.20 ft	on 12-04-1975
29.	21.13 ft	on 12-02-1980
30.	21.08 ft	on 01-23-1982
31.	20.64 ft	on 12-02-1998
32.	20.48 ft	on 01-18-2006
33.	20.39 ft	on 03-30-2012
34.	20.19 ft	on 12-10-1987
35.	20.19 ft	on 03-02-1972
36.	20.12 ft	on 12-31-2002
37.	19.94 ft	on 01-23-1970
38.	19.73 ft	on 04-08-2019
39.	19.67 ft	on 12-28-2005
40.	19.04 ft	on 12-10-1968
41.	18.91 ft	on 01-10-1988
42.	18.87 ft	on 03-16-2025	(P)
43.	18.86 ft	on 01-15-1988
44.	18.78 ft	on 11-26-1971
45.	18.75 ft	on 11-07-2006
46.	18.60 ft	on 02-18-1983
47.	18.49 ft	on 01-07-1990
48.	18.42 ft	on 12-28-2008
49.	18.37 ft	on 01-06-1977
50.	18.36 ft	on 12-07-2015
51.	18.35 ft	on 12-13-2003
52.	18.27 ft	on 11-19-2012
53.	18.02 ft	on 02-12-2014