The monitoring network within this area

Hydrionis holds 652 values from 2 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.

2

Gauges

652

Values held

1905–2026

Record spans

Gauges within the Middle Snake-Succor huc8 subbasin

2 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 SNAKE RIVER NR MURPHY ID

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1914–2025.

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	SNAKE RIVER NR MURPHY ID (m³/s)
1914	1,121
1916	833
1917	1,085
1918	1,339
1919	538
1920	665
1922	915
1923	773
1924	530
1925	765
1927	949
1928	750
1929	648
1930	447
1932	484
1933	340
1935	323
1936	830
1937	405
1938	799
1939	549
1940	340
1941	306
1942	677
1943	946
1944	850
1945	756
1946	875
1947	917
1948	682
1949	541
1950	807
1951	739
1952	1,017
1953	813
1954	453
1955	436
1956	1,022
1957	983
1958	552
1959	433
1960	433
1962	614
1963	793
1964	878
1966	566
1967	680
1968	578
1969	810
1970	748
1971	991
1972	898
1974	900
1975	799
1976	841
1978	541
1979	691
1980	821
1981	580
1983	917
1984	1,000
1986	600
1987	334
1989	456
1991	345
1993	668
1995	827
1996	801
1997	1,141
1998	875
1999	745
2002	277
2005	428
2006	850
2017	1,002
2018	677
2019	731
2020	462
2021	374
2022	297
2023	354
2024	580
2025	303

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	1914–2025
Completeness	74.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	18 separate periods inside 1914–2025 hold no value. The longest runs from 2007 to 2016 — 10 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1914 and is not continuous from it: 112 years separate the first value from the last, and 74% 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 SNAKE RIVER NR MURPHY ID, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1914–2025.

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	SNAKE RIVER NR MURPHY ID (mm)
1914	118
1915	81.0
1916	109
1917	131
1918	113
1919	82.0
1920	89.0
1921	112
1922	102
1923	97.0
1924	74.0
1925	107
1926	73.0
1927	96.0
1928	108
1929	89.0
1930	76.0
1931	65.0
1932	70.0
1933	68.0
1934	60.0
1935	62.0
1936	77.0
1937	70.0
1938	89.0
1939	78.0
1940	68.0
1941	68.0
1942	81.0
1943	115
1944	85.0
1945	92.0
1946	101
1947	90.0
1948	92.0
1949	92.0
1950	106
1951	115
1952	113
1953	88.0
1954	81.0
1955	77.0
1956	104
1957	95.0
1958	83.0
1959	73.0
1960	69.0
1961	61.0
1962	79.0
1963	80.0
1964	91.0
1965	112
1966	78.0
1967	76.0
1968	79.0
1969	98.0
1970	95.0
1971	143
1972	135
1973	91.0
1974	116
1975	118
1976	123
1977	66.0
1978	80.0
1979	82.0
1980	80.0
1981	72.0
1982	119
1983	142
1984	157
1985	103
1986	141
1987	72.0
1988	61.0
1989	67.0
1990	61.0
1991	60.0
1992	54.0
1993	72.0
1994	65.0
1995	79.0
1996	108
1997	156
1998	115
1999	112
2000	75.0
2001	57.0
2002	54.0
2003	51.0
2004	52.0
2005	56.0
2006	78.0
2007	57.0
2008	57.0
2009	76.0
2010	63.0
2011	117
2012	69.0
2013	53.0
2014	54.0
2015	56.0
2016	56.0
2017	106
2018	91.0
2019	78.0
2020	66.0
2021	53.0
2022	50.0
2023	56.0
2024	65.0
2025	55.0

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	1914–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1914 to 2025 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

1 automated snow station sits inside this drainage area, weighing the snowpack rather than measuring how deep it is.

241

Fullest snowpack recorded at Reynolds Creek, in 2023 (mm of water)

7

Thinnest, in 2026 (mm of water)

February

Month the pack is usually at its fullest

April

Month the pack has gone by, in half of years

Peak snowpack at Reynolds Creek

Water years 2002–2026. 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	Reynolds Creek (mm)
2002	41.0
2004	143
2005	13.0
2006	68.0
2007	24.0
2008	171
2009	82.0
2010	167
2011	67.0
2012	45.0
2013	98.0
2014	55.0
2015	32.0
2016	184
2017	205
2018	40.0
2019	196
2020	91.0
2021	151
2022	155
2023	241
2024	227
2025	208
2026	7.00

Read against the river

Reynolds Creek and SNAKE RIVER NR MURPHY ID both sit in this drainage area, and their records overlap by 23 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 Snake-Succor and what each holds
Gauge	Measures	Values	Record
SNAKE RIVER NR MURPHY ID	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	358	1913–2026
SUCCOR CREEK AT MOUTH NR HOMEDALE ID	catchment area, annual maximum river flow	6	1905–2026

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 — 17050103. 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
SNAKE RIVER NR MURPHY ID	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
SUCCOR CREEK AT MOUTH NR HOMEDALE ID	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 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	1	no
Years spanned	122	yes, 20 or more
Values held	652	no
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-13172500.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 Snake-Succor gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-snake-succor/

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 Snake-Succor 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 confidence2025-02-26

Source: USGS — National Water Information System, USGS site 13172500, 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.