The monitoring network within this area

Hydrionis holds 406 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.

Gauges

406

Values held

1911–2026

Record spans

Gauges within the Little Snake 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 LITTLE SNAKE RIVER NEAR LILY, CO

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1923–2025.

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	LITTLE SNAKE RIVER NEAR LILY, CO (m³/s)
1923	151
1924	107
1925	86.6
1926	402
1927	204
1928	184
1929	213
1930	102
1932	201
1933	186
1934	28.2
1935	107
1936	187
1937	165
1938	243
1939	104
1940	99.7
1941	247
1942	163
1943	311
1944	176
1945	161
1946	93.7
1947	167
1948	119
1949	157
1950	131
1951	91.2
1952	256
1953	112
1954	71.9
1955	77.0
1956	162
1957	195
1958	144
1959	78.7
1960	91.7
1961	53.8
1962	289
1963	75.3
1964	137
1965	183
1966	219
1967	107
1968	137
1969	106
1970	214
1971	275
1972	92.9
1973	166
1974	212
1975	180
1976	125
1977	71.1
1978	148
1979	141
1980	175
1981	129
1982	157
1983	216
1984	473
1985	162
1986	188
1987	71.9
1988	138
1989	76.2
1990	82.7
1991	90.6
1992	56.4
1993	168
1994	80.4
1995	176
1996	157
1997	144
1998	134
1999	183
2000	119
2001	91.2
2002	31.7
2003	124
2004	39.1
2005	123
2006	131
2007	68.2
2008	231
2009	184
2010	180
2011	292
2012	43.6
2013	63.1
2014	132
2015	137
2016	185
2017	92.6
2018	58.9
2019	119
2020	148
2021	36.5
2022	87.2
2023	171
2024	110
2025	52.1

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	1923–2025
Completeness	99.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1923–2025 holds no value: 1931. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1923 and is not continuous from it: 103 years separate the first value from the last, and 99% of the years between them are held. The span is not the record.
Last read from the publisher	2026-08-31
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 LITTLE SNAKE RIVER NEAR LILY, CO, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1922–2024.

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	LITTLE SNAKE RIVER NEAR LILY, CO (mm)
1922	53.0
1923	56.0
1924	46.0
1925	52.0
1926	62.0
1927	68.0
1928	69.0
1929	103
1930	32.0
1931	55.0
1932	88.0
1933	61.0
1934	9.00
1935	30.0
1936	43.0
1937	58.0
1938	58.0
1939	33.0
1940	32.0
1941	50.0
1942	50.0
1943	40.0
1944	47.0
1945	57.0
1946	39.0
1947	55.0
1948	33.0
1949	65.0
1950	51.0
1951	36.0
1952	84.0
1953	32.0
1954	21.0
1955	28.0
1956	48.0
1957	62.0
1958	49.0
1959	27.0
1960	33.0
1961	22.0
1962	64.0
1963	24.0
1964	38.0
1965	59.0
1966	34.0
1967	41.0
1968	57.0
1969	48.0
1970	62.0
1971	75.0
1972	42.0
1973	62.0
1974	62.0
1975	52.0
1976	44.0
1977	12.0
1978	59.0
1979	50.0
1980	66.0
1981	31.0
1982	66.0
1983	81.0
1984	108
1985	64.0
1986	71.0
1987	30.0
1988	38.0
1989	23.0
1990	22.0
1991	28.0
1992	19.0
1993	59.0
1994	24.0
1995	76.0
1996	48.0
1997	80.0
1998	62.0
1999	64.0
2000	34.0
2001	31.0
2002	13.0
2003	31.0
2004	23.0
2005	45.0
2006	33.0
2007	30.0
2008	66.0
2009	70.0
2010	61.0
2011	120
2012	20.0
2013	18.0
2014	46.0
2015	32.0
2016	54.0
2017	41.0
2018	19.0
2019	50.0
2020	38.0
2021	15.0
2022	30.0
2023	71.0
2024	42.0

About this series

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	1922–2024
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1922 to 2024 is held.
Last read from the publisher	2026-08-24
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

Every gauge Hydrionis holds within this area

Gauges within the Little Snake and what each holds
Gauge	Measures	Values	Record
LITTLE SNAKE RIVER NEAR LILY, CO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	242	1922–2026
LITTLE SNAKE RIVER NEAR DIXON, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	164	1911–2026

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 — 14050003. 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
LITTLE SNAKE RIVER NEAR LILY, CO	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	2026-08-26
LITTLE SNAKE RIVER NEAR DIXON, WY	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	2026-08-26

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	2	no
Years spanned	116	yes, 20 or more
Values held	406	no
Distinct measurements	4	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-09260000.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), Little Snake gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-little-snake/

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 Little Snake 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 confidence2025-05-14

Source: USGS — National Water Information System, USGS site 09260000, 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 31 August 2026.