The monitoring network within this area

Hydrionis holds 533,186 values from 33 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

33

Gauges

533,186

Values held

1900–2026

Record spans

30,638 km²

Area

Gauges within the Ångermanälven drainage basin

33 monitoring points, positioned as the publisher records them.

How low, how high and how variable this gauge runs

A hydrograph says what happened; these say how often. Read off RÖÅN's whole daily record between 1943 and 2026, they describe the shape of the record rather than any day in it — and they belong to this gauge and its reach, not to this drainage area.

1.700 m³/s

Q95 low flow

4.400 m³/s

Q50 median flow

11.600 m³/s

Q10 high flow

Largest day of each water year at RÖÅN

The highest daily mean discharge in each October-to-September water year, 1943–2025.

These are the largest daily means, not flood peaks. A peak lasting hours is averaged across a whole day here, so the true instantaneous maximum on the same day was higher — sometimes far higher on a fast-responding catchment. Flood frequency work needs a publisher's own instantaneous series; Hydrionis holds one for 2,236 American gauges and not for this one, so the two are never drawn together. A water year the gauge did not substantially cover produces no value at all rather than a low one.

View the data behind this chart

Underlying data
Period	RÖÅN (m³/s)
1943	13.4
1944	24.0
1945	16.3
1946	12.5
1947	17.3
1948	17.3
1949	19.8
1950	16.1
1951	16.8
1952	22.0
1953	17.1
1954	16.3
1955	17.8
1956	12.5
1957	13.8
1958	16.8
1959	12.1
1960	20.0
1961	11.3
1962	6.80
1963	13.8
1964	16.8
1965	19.7
1966	25.0
1967	21.0
1968	14.0
1969	11.4
1970	16.5
1971	15.0
1972	18.9
1973	12.8
1974	20.0
1975	11.0
1976	20.0
1977	11.2
1978	12.6
1979	18.6
1980	17.3
1981	17.3
1982	24.0
1983	14.2
1984	19.4
1985	17.6
1986	13.1
1987	19.4
1988	22.6
1989	14.0
1990	12.7
1991	14.8
1992	19.4
1993	16.5
1994	19.8
1995	9.38
1996	19.6
1997	15.4
1998	15.7
1999	14.4
2000	14.5
2001	15.2
2002	11.1
2003	12.6
2004	15.2
2005	14.6
2006	15.0
2007	15.5
2008	12.8
2009	12.6
2010	12.9
2011	16.2
2012	12.7
2013	14.0
2014	16.7
2015	14.3
2016	11.4
2017	18.7
2018	14.0
2019	11.5
2020	11.0
2021	13.7
2022	13.2
2023	17.2
2024	10.4
2025	11.8

The longest record here

Mean river flow at RÖÅN

Annual means of the daily record, 1944–2025. One gauge, not this drainage area.

Annual means computed by Hydrionis from the published daily record, drawn only for years with at least 300 days held. They summarise this gauge's own record and say nothing about any other watercourse in this area.

View the data behind this chart

Underlying data
Period	RÖÅN (m³/s)
1944	5.82
1945	8.46
1946	4.98
1947	3.48
1948	5.61
1949	4.96
1950	6.85
1951	5.50
1952	6.47
1953	6.91
1954	5.76
1955	4.63
1956	4.99
1957	4.64
1958	4.67
1959	5.04
1960	5.67
1961	8.07
1962	5.18
1963	3.51
1964	6.00
1965	5.20
1966	5.73
1967	7.98
1968	5.03
1969	3.31
1970	3.81
1971	4.94
1972	5.59
1973	5.06
1974	6.34
1975	5.45
1976	3.09
1977	5.49
1978	4.78
1979	5.25
1980	5.81
1981	6.42
1982	5.14
1983	7.11
1984	5.58
1985	8.49
1986	5.61
1987	7.04
1988	6.13
1989	5.78
1990	4.94
1991	5.09
1992	6.20
1993	9.41
1994	4.78
1995	5.37
1996	4.31
1997	5.31
1998	7.46
1999	5.70
2000	8.20
2001	9.09
2002	4.53
2003	4.84
2004	4.41
2005	7.73
2006	6.17
2007	5.74
2008	4.15
2009	6.83
2010	5.63
2011	6.65
2012	8.49
2013	5.99
2014	4.92
2015	6.16
2016	4.34
2017	5.08
2018	4.73
2019	4.98
2020	6.07
2021	5.84
2022	6.76
2023	5.82
2024	6.81
2025	6.69

Every gauge Hydrionis holds within this area

Gauges within the Ångermanälven and what each holds
Gauge	Measures	Values	Record
RÖÅN	mean river flow	30,376	1943–2026
ANKARVATTNET	mean river flow	30,224	1944–2026
FLÅSJÖN NEDRE	mean river flow	28,714	1947–2026
VOJMSJÖLUSPEN	mean river flow	28,275	1948–2026
HJÄLTA KRV	mean river flow	28,153	1949–2026
FÄTTJAURE	mean river flow	26,787	1945–2026
KILFORSENS KRV	mean river flow	26,692	1953–2026
BORGA NEDRE	mean river flow	25,231	1957–2026
LASELE KRV	mean river flow	25,231	1957–2026
KILVAMSKLIPPEN	mean river flow	25,110	1958–2026
SOLLEFTEÅ KRV	mean river flow	21,944	1966–2026
SPORRSJÖN VÄNGELÄLV 2	mean river flow	19,114	1973–2026
LÅNGSELE	mean river flow	17,746	1900–1948
STRÖMSVATTUDAL 3	mean river flow	17,196	1979–2026
MESJÖN ÖVRE	mean river flow	16,199	1982–2026
LAJKSJÖN 2	mean river flow	16,081	1981–2026
MALGOMAJS KRV	mean river flow	15,735	1983–2026
NYLUSPEN	mean river flow	14,488	1909–1948
FORSMO	mean river flow	13,514	1909–1945
MAKSJÖN	mean river flow	12,692	1922–1956
NEDRE KILFORSEN	mean river flow	11,537	1921–1952
JORMVATTNET	mean river flow	10,653	1913–1942
ÅSELE	mean river flow	9,345	1913–1938
BRATTÅSEN	mean river flow	8,523	1913–1936
TÅSJÖ	mean river flow	8,280	1913–1935
BORKAN	mean river flow	7,579	1944–1964
HOVERUDDE	mean river flow	7,124	1913–1932
FORSÅS	mean river flow	6,604	1913–1931
BORGA	mean river flow	6,446	1922–1950
MAKSJÖSTRAND	mean river flow	5,113	1909–1922
FÄRJETORP	mean river flow	4,566	1913–1925
TÅSJÖEDET	mean river flow	4,018	1936–1946
INVIKEN	mean river flow	3,896	1922–1932

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 38000. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
RÖÅN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
ANKARVATTNET	Stated by the publisher on the record this gauge’s observations came from.	With the observations
FLÅSJÖN NEDRE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
VOJMSJÖLUSPEN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
HJÄLTA KRV	Stated by the publisher on the record this gauge’s observations came from.	With the observations
FÄTTJAURE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
KILFORSENS KRV	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BORGA NEDRE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
LASELE KRV	Stated by the publisher on the record this gauge’s observations came from.	With the observations
KILVAMSKLIPPEN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
SOLLEFTEÅ KRV	Stated by the publisher on the record this gauge’s observations came from.	With the observations
SPORRSJÖN VÄNGELÄLV 2	Stated by the publisher on the record this gauge’s observations came from.	With the observations
LÅNGSELE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
STRÖMSVATTUDAL 3	Stated by the publisher on the record this gauge’s observations came from.	With the observations
MESJÖN ÖVRE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
LAJKSJÖN 2	Stated by the publisher on the record this gauge’s observations came from.	With the observations
MALGOMAJS KRV	Stated by the publisher on the record this gauge’s observations came from.	With the observations
NYLUSPEN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
FORSMO	Stated by the publisher on the record this gauge’s observations came from.	With the observations
MAKSJÖN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
NEDRE KILFORSEN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
JORMVATTNET	Stated by the publisher on the record this gauge’s observations came from.	With the observations
ÅSELE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BRATTÅSEN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
TÅSJÖ	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BORKAN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
HOVERUDDE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
FORSÅS	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BORGA	Stated by the publisher on the record this gauge’s observations came from.	With the observations
MAKSJÖSTRAND	Stated by the publisher on the record this gauge’s observations came from.	With the observations
FÄRJETORP	Stated by the publisher on the record this gauge’s observations came from.	With the observations
TÅSJÖEDET	Stated by the publisher on the record this gauge’s observations came from.	With the observations
INVIKEN	Stated by the publisher on the record this gauge’s observations came from.	With the observations

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 3 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	33	yes, 3 or more
Years spanned	127	yes, 20 or more
Values held	533,186	yes, 1000 or more
Distinct measurements	1	no
Publishers measuring it	1	no
Official identifiers	2	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/se-smhi-1378.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Attribution you are required to give

These are conditions of the licences the underlying data is published under. They are obligations to the publishers, not to Hydrionis, and they apply to you directly whether or not you mention Hydrionis at all.

Data from Sveriges meteorologiska och hydrologiska institut, used under CC BY 4.0.

Sveriges meteorologiska och hydrologiska institut — CC BY 4.0 (licence text)

Suggested citation for Hydrionis

Hydrionis (2026), Ångermanälven gauge records, accessed 2026-10-05, hydrionis.com/waters/sweden-angermanalven/

Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Ångermanälven gauge records changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

Where these figures come from

MeasuredMedium confidence2026-09-30

Source: SMHI — Swedish hydrological observations, 1378. Licence: Open — attribution required (attribution required).

Method: Daily discharge exactly as SMHI publishes it, from its corrected archive. SMHI computes the daily value from its own sub-daily measurement and rating curves; Hydrionis does not recompute it, because a mean derived from whatever sub-daily data happens to be exposed would be a different statistic under the same name.

Checked and approved by SMHI except 2026-05-03 to 2026-09-30 (not yet checked). Station in the ÅNGERMANÄLVEN main drainage basin, 584 km². Discharge is a property of this gauge and this reach, not of the river as a whole.

Retrieved 1 October 2026.