The monitoring network within this area

Hydrionis holds 2,693 values from 7 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.

7

Gauges

2,693

Values held

1904–2026

Record spans

Gauges within the Wallowa huc8 subbasin

7 monitoring points, positioned as the publisher records them.

Flood peaks, as measured

This gauge's flood record, as measured. Unlike a daily mean it is the discharge at the moment the river was highest, which is the figure flood frequency analysis is built on.

Largest measured flow of each year at LOSTINE RIVER NEAR LOSTINE, OR

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1913–2012.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Published by the gauge's own operator from its sub-daily record; Hydrionis stores the figure rather than recomputing it. A year the gauge did not cover produces no value rather than a low one, and the gaps are stated below the chart. A peak is a property of this gauge and its reach: a larger flood upstream or downstream of it is not in this series.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	LOSTINE RIVER NEAR LOSTINE, OR (m³/s)
1913	71.9
1926	18.8
1927	56.9
1928	56.9
1929	44.5
1930	30.9
1931	29.4
1932	51.0
1933	65.4
1934	30.6
1935	32.8
1936	50.1
1937	36.5
1938	52.7
1939	32.8
1940	35.1
1941	27.1
1942	36.2
1943	50.4
1944	33.4
1945	50.4
1946	41.9
1947	42.5
1948	55.5
1949	41.9
1950	49.8
1951	35.4
1952	48.1
1953	45.9
1954	37.9
1955	47.9
1956	53.2
1957	61.4
1958	49.3
1959	50.4
1960	39.9
1961	49.3
1962	44.2
1963	38.2
1964	41.9
1965	51.5
1966	31.1
1967	51.5
1968	37.9
1969	62.6
1970	60.9
1971	64.8
1972	54.9
1973	33.1
1974	72.2
1975	64.3
1976	39.1
1977	34.8
1978	40.8
1979	36.2
1980	38.5
1981	44.5
1982	53.5
1983	49.3
1984	64.3
1985	49.6
1986	60.3
1987	34.3
1988	31.4
1989	50.1
1990	34.3
1991	36.8
1996	54.1
1997	52.4
1998	27.7
1999	54.4
2000	31.7
2001	30.6
2002	47.0
2003	59.5
2004	39.6
2005	30.3
2006	48.4
2008	51.8
2009	46.7
2010	60.6
2011	45.6
2012	42.8

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Measured
Period held	1913–2012
Completeness	83.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	3 separate periods inside 1913–2012 hold no value. The longest runs from 1914 to 1925 — 12 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1913 and is not continuous from it: 100 years separate the first value from the last, and 83% of the years between them are held. The span is not the record.
Last read from the publisher	2026-10-01
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

How much of the rain came back out

A discharge in cubic metres per second cannot be compared with anything: the larger number may only mean the larger catchment. Divided by the area draining to the gauge it becomes a depth of water over that land, which answers a question a reader already has — of the rain that fell here, how much came back out as river?

Water leaving the catchment above LOSTINE RIVER NEAR LOSTINE, OR, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1913–2011.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Computed by Hydrionis from the published annual mean flow and the catchment area the station's own publisher states. It is not a water balance: the difference between rainfall and runoff is not evaporation alone but also change in groundwater storage, water abstracted and taken elsewhere, and water imported by transfer schemes — which is why a catchment can yield more runoff than the rain that fell on it without anything being measured wrongly. A different area figure rescales every value here by the ratio between them.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	LOSTINE RIVER NEAR LOSTINE, OR (mm)
1913	1,329
1926	677
1927	1,324
1928	1,002
1929	691
1930	699
1931	603
1932	971
1933	985
1934	816
1935	733
1936	817
1937	695
1938	1,053
1939	700
1940	753
1941	849
1942	870
1943	1,146
1944	672
1945	950
1946	1,173
1947	1,079
1948	1,158
1949	987
1950	1,097
1951	885
1952	1,052
1953	1,056
1954	886
1955	842
1956	1,256
1957	1,050
1958	1,198
1959	1,131
1960	829
1961	920
1962	1,028
1963	786
1964	912
1965	1,243
1966	617
1967	1,030
1968	886
1969	941
1970	1,104
1971	1,193
1972	1,096
1973	703
1974	1,313
1975	1,157
1976	982
1977	525
1978	1,089
1979	783
1980	976
1981	888
1982	1,207
1983	971
1984	1,127
1985	825
1986	888
1987	613
1988	651
1989	851
1990	827
1996	1,166
1997	1,254
1998	845
1999	1,014
2000	855
2001	573
2002	879
2003	844
2004	964
2005	753
2006	1,060
2007	701
2008	1,061
2009	894
2010	862
2011	1,072

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Derived Computed by Hydrionis
Period held	1913–2011
Completeness	82.8% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1913–2011 hold no value. The longest runs from 1914 to 1925 — 12 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1913 and is not continuous from it: 99 years separate the first value from the last, and 83% of the years between them are held. The span is not the record.
Inputs last read	2026-10-01 · when the records this was computed from were last read from their publishers
Calculation date	2026-08-24 · when the calculation method was last versioned, not a reading of any publisher
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

The snow standing above this water

2 automated snow stations sit inside this drainage area, weighing the snowpack rather than measuring how deep it is.

850

Fullest snowpack recorded at Mt. Howard, in 1997 (mm of water)

201

Thinnest, in 1981 (mm of water)

April

Month the pack is usually at its fullest

June

Month the pack has gone by, in half of years

Peak snowpack at Mt. Howard

Water years 1981–2026. Each point is the fullest month of that snow season.

A water year runs October to September and is named for the year it ends, so the snow of one winter stays in one point. The value is the fullest month, not the fullest day: a pack that peaked sharply mid-month reads lower here than a single measurement taken at the right moment would.

View the data behind this chart

Underlying data
Period	Mt. Howard (mm)
1981	201
1982	710
1983	269
1984	671
1985	307
1986	574
1987	354
1988	411
1989	527
1990	378
1991	541
1992	220
1993	404
1994	239
1995	515
1996	435
1997	850
1998	456
1999	500
2000	472
2001	340
2002	474
2003	569
2004	328
2005	381
2006	567
2007	315
2008	567
2009	559
2010	426
2011	476
2012	565
2013	399
2014	577
2015	335
2016	363
2017	589
2018	406
2019	530
2020	392
2021	314
2022	514
2023	488
2024	399
2025	404
2026	242

Read against the river

Mt. Howard and EAST FORK WALLOWA RIVER NEAR JOSEPH, OR both sit in this drainage area, and their records overlap by 44 years. That is the span the two have in common, not a count of years both actually hold — either record may have gaps inside it. The two are shown separately rather than on one axis: millimetres of stored water and cubic metres per second are not commensurable, and a difference between them would mean nothing.

Being in the same drainage area does not put the snowpack upstream of the gauge. A subbasin is an area, and snow on one tributary can join the river below a gauge on another — so a weak relationship here may say more about which tributary was measured than about the snow.

Every gauge Hydrionis holds within this area

Gauges within the Wallowa and what each holds
Gauge	Measures	Values	Record
LOSTINE RIVER NEAR LOSTINE, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	287	1912–2026
BEAR CREEK NEAR WALLOWA, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	270	1915–2026
WALLOWA RIVER AT JOSEPH,OREG.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	234	1904–2026
MINAM RIVER AT MINAM, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	219	1912–2026
EAST FK WALLOWA R & W FLS PP TR NR JOSEPH,OREG.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	209	1924–2026
EAST FORK WALLOWA RIVER NEAR JOSEPH, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	204	1924–2026
HURRICANE CREEK NEAR JOSEPH, OREG.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	199	1915–2026

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 — 17060105. 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
LOSTINE RIVER NEAR LOSTINE, OR	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
BEAR CREEK NEAR WALLOWA, OR	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
WALLOWA RIVER AT JOSEPH,OREG.	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
MINAM RIVER AT MINAM, OR	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
EAST FK WALLOWA R & W FLS PP TR NR JOSEPH,OREG.	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
EAST FORK WALLOWA RIVER NEAR JOSEPH, OR	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
HURRICANE CREEK NEAR JOSEPH, OREG.	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02

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 5 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	7	yes, 3 or more
Years spanned	123	yes, 20 or more
Values held	2,693	yes, 1000 or more
Distinct measurements	6	yes, 2 or more
Publishers measuring it	2	yes, 2 or more
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-13330000.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

Suggested citation for Hydrionis

Hydrionis (2026), Wallowa gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-wallowa/

Cite Hydrionis where you rely on values Hydrionis computed, on the method that produced them, or on the compilation itself. The underlying measurements remain the publishers’ and their attribution requirements apply to you directly.

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 Wallowa 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.

None of the contributing licences requires attribution. Crediting the publishers is still good practice and they are listed above.

Where these figures come from

MeasuredHigh confidence2012-06-05

Source: USGS — National Water Information System, USGS site 13330000, annual peak streamflow. Licence: Open.

Method: The instantaneous maximum discharge of each water year as published by USGS, dated to the day it occurred. One value per October-to-September water year; where the publisher lists both a systematic and a historic peak for a year, the larger is the annual maximum. Values the publisher marks as maximum daily averages are not held here, because they are not instantaneous peaks. Values marked as bounded rather than measured are held as censored observations carrying the bound. Cubic feet per second are converted to cubic metres per second and the publisher unit is recorded alongside.

Rating curves are extrapolated at extreme discharges, so the largest values in a peak series carry the largest measurement uncertainty. Data from the U.S. Geological Survey National Water Information System, a work of the United States government and therefore in the public domain.

Retrieved 1 October 2026.