The monitoring network within this area

Hydrionis holds 2,347 values from 6 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.

6

Gauges

2,347

Values held

1878–2026

Record spans

Gauges within the Middle Columbia-Hood huc8 subbasin

6 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 WHITE SALMON RIVER NEAR UNDERWOOD, WA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1916–2025.

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	WHITE SALMON RIVER NEAR UNDERWOOD, WA (m³/s)
1916	116
1917	60.3
1919	164
1920	108
1921	122
1923	193
1924	86.6
1925	147
1926	78.7
1927	125
1929	77.0
1930	91.2
1936	98.8
1937	119
1939	64.0
1940	111
1941	49.6
1943	170
1945	97.4
1946	196
1948	182
1949	204
1950	149
1951	177
1952	167
1953	203
1954	125
1955	66.0
1957	120
1958	145
1959	135
1960	107
1961	180
1962	86.9
1964	141
1966	75.0
1967	129
1968	196
1969	140
1970	227
1971	129
1972	237
1974	433
1975	138
1977	42.5
1979	64.8
1980	92.9
1982	351
1983	166
1984	92.3
1985	93.7
1986	180
1987	85.8
1989	91.2
1990	178
1992	79.9
1993	90.3
1994	42.5
1995	183
1996	1,280
1997	233
1998	180
1999	180
2001	50.1
2002	130
2003	309
2004	82.1
2005	94.6
2006	227
2007	135
2009	144
2010	74.8
2011	202
2012	83.8
2014	110
2015	79.9
2017	109
2019	65.1
2020	69.7
2021	133
2022	64.6
2023	82.1
2025	85.8

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	1916–2025
Completeness	75.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	23 separate periods inside 1916–2025 hold no value. The longest runs from 1931 to 1935 — 5 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1916 and is not continuous from it: 110 years separate the first value from the last, and 75% 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 COLUMBIA RIVER AT THE DALLES, 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. 1879–2024.

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	COLUMBIA RIVER AT THE DALLES, OR (mm)
1879	354
1880	390
1881	366
1882	339
1883	298
1884	326
1885	309
1886	294
1887	389
1888	290
1889	188
1890	286
1891	248
1892	289
1893	335
1894	450
1895	266
1896	349
1897	351
1898	323
1899	363
1900	320
1901	304
1902	286
1903	326
1904	331
1905	206
1906	240
1907	326
1908	282
1909	290
1910	306
1911	260
1912	270
1913	314
1914	274
1915	205
1916	349
1917	309
1918	292
1919	243
1920	246
1921	331
1922	257
1923	261
1924	200
1925	292
1926	182
1927	328
1928	300
1929	189
1930	192
1931	177
1932	279
1933	309
1934	286
1935	239
1936	230
1937	198
1938	273
1939	219
1940	220
1941	206
1942	243
1943	299
1944	173
1945	221
1946	295
1947	287
1948	332
1949	262
1950	330
1951	325
1952	277
1953	268
1954	306
1955	267
1956	349
1957	277
1958	269
1959	325
1960	262
1961	272
1962	257
1963	243
1964	283
1965	318
1966	234
1967	283
1968	246
1969	296
1970	242
1971	333
1972	358
1973	198
1974	346
1975	280
1976	314
1977	171
1978	254
1979	218
1980	236
1981	273
1982	336
1983	318
1984	306
1985	243
1986	272
1987	207
1988	201
1989	225
1990	268
1991	286
1992	203
1993	224
1994	192
1995	270
1996	356
1997	389
1998	269
1999	325
2000	258
2001	163
2002	247
2003	224
2004	219
2005	215
2006	274
2007	238
2008	248
2009	237
2010	218
2011	349
2012	318
2013	251
2014	264
2015	225
2016	246
2017	327
2018	287
2019	224
2020	251
2021	220
2022	235
2023	194
2024	190

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	1879–2024
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1879 to 2024 is held.
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.

2,442

Fullest snowpack recorded at Red Hill, in 2008 (mm of water)

126

Thinnest, in 2015 (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 Red Hill

Water years 1979–2026. 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	Red Hill (mm)
1979	1,141
1980	1,288
1981	386
1982	1,302
1983	1,068
1984	1,290
1985	1,550
1986	1,006
1987	988
1988	1,087
1989	1,368
1990	1,210
1991	926
1992	367
1993	1,153
1994	1,026
1995	922
1996	930
1997	1,972
1998	1,304
1999	1,658
2000	1,274
2001	795
2002	1,849
2003	763
2004	1,238
2005	287
2006	1,336
2007	1,311
2008	2,442
2009	1,273
2010	1,037
2011	1,623
2012	1,633
2013	1,109
2014	956
2015	126
2016	1,054
2017	1,527
2018	1,087
2019	986
2020	1,191
2021	1,368
2022	1,701
2023	1,417
2024	976
2025	1,059
2026	448

Read against the river

Red Hill and COLUMBIA RIVER AT THE DALLES, OR both sit in this drainage area, and their records overlap by 46 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 Middle Columbia-Hood and what each holds
Gauge	Measures	Values	Record
COLUMBIA RIVER AT THE DALLES, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	430	1878–2026
WHITE SALMON RIVER NEAR UNDERWOOD, WA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	350	1915–2026
HOOD RIVER AT TUCKER BRIDGE, NEAR HOOD RIVER, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	216	1897–2026
HOOD RIVER + PPEL CONDUIT,NR HOOD RIVER OREG.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	177	1913–2026
WHITE SALMON RIVER AT HUSUM, WA	catchment area, annual maximum river flow	27	1909–2026
TROUT LAKE CREEK NEAR TROUT LAKE, WA	catchment area, annual maximum river flow	13	1909–2026

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 — 17070105. 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
COLUMBIA RIVER AT THE DALLES, 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
WHITE SALMON RIVER NEAR UNDERWOOD, WA	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
HOOD RIVER AT TUCKER BRIDGE, NEAR HOOD RIVER, 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
HOOD RIVER + PPEL CONDUIT,NR HOOD RIVER 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
WHITE SALMON RIVER AT HUSUM, WA	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
TROUT LAKE CREEK NEAR TROUT LAKE, WA	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	4	yes, 3 or more
Years spanned	149	yes, 20 or more
Values held	2,347	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-14105700.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), Middle Columbia-Hood gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-columbia-hood/

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 Middle Columbia-Hood 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 confidence2025-04-16

Source: USGS — National Water Information System, USGS site 14105700, 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.