The monitoring network within this area

Hydrionis holds 2,063 values from 4 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.

4

Gauges

2,063

Values held

1903–2026

Record spans

Gauges within the Clear huc8 subbasin

4 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 PINEY CREEK AT KEARNY, WY

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1903–2015.

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	PINEY CREEK AT KEARNY, WY (m³/s)
1903	23.6
1904	32.3
1905	46.4
1906	54.1
1911	18.0
1912	35.1
1915	26.7
1916	25.8
1917	34.5
1919	12.7
1920	32.0
1921	22.5
1922	28.9
1923	35.7
1941	33.4
1942	48.1
1943	25.9
1944	72.8
1945	50.7
1946	30.3
1947	28.9
1948	45.0
1949	34.8
1950	28.6
1951	13.9
1952	35.7
1953	41.9
1954	20.2
1955	17.3
1956	52.1
1957	41.1
1958	35.4
1959	14.7
1960	8.89
1961	16.5
1962	45.6
1963	96.6
1964	55.2
1965	27.6
1966	10.8
1967	40.5
1968	49.6
1969	10.4
1970	30.9
1971	34.3
1972	37.7
1973	53.2
1974	30.0
1975	34.3
1976	16.6
1977	40.2
1978	36.2
1979	13.3
1980	10.5
1981	28.3
1982	22.4
1983	30.6
1984	35.7
1985	3.43
1986	36.2
1987	11.7
1988	27.4
1989	8.21
1990	28.9
1991	38.5
1992	24.6
1993	26.6
1994	20.7
1995	50.1
1996	23.2
1997	53.0
1998	13.9
1999	36.2
2000	27.4
2001	4.79
2002	9.57
2003	24.9
2004	2.12
2005	28.3
2009	12.4
2010	39.9
2011	31.7
2012	18.3
2013	31.7
2014	28.2
2015	37.1

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	1903–2015
Completeness	76.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	5 separate periods inside 1903–2015 hold no value. The longest runs from 1924 to 1940 — 17 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1903 and is not continuous from it: 113 years separate the first value from the last, and 76% 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 CLEAR CREEK NEAR BUFFALO, WY, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1918–2025.

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	CLEAR CREEK NEAR BUFFALO, WY (mm)
1918	205
1919	99.0
1920	256
1921	132
1922	225
1923	382
1924	349
1925	243
1926	284
1939	78.0
1940	96.0
1941	189
1942	102
1943	218
1944	229
1945	196
1946	163
1947	184
1948	138
1949	148
1950	138
1951	108
1952	143
1953	111
1954	53.0
1955	78.0
1956	114
1957	173
1958	159
1959	147
1960	91.0
1961	109
1962	207
1963	259
1964	125
1965	142
1966	103
1967	239
1968	206
1969	107
1970	118
1971	219
1972	223
1973	155
1974	161
1975	245
1976	212
1977	121
1978	295
1979	203
1980	182
1981	141
1982	220
1983	207
1984	254
1985	103
1986	183
1987	174
1988	111
1989	142
1990	193
1991	234
2015	202
2016	127
2017	343
2018	212
2019	229
2020	118
2021	157
2022	121
2023	303
2024	151
2025	114

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	1918–2025
Completeness	67.6% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1918–2025 hold no value. The longest runs from 1992 to 2014 — 23 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1918 and is not continuous from it: 108 years separate the first value from the last, and 68% 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

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

627

Fullest snowpack recorded at Cloud Peak Reservoir, in 1986 (mm of water)

247

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 Cloud Peak Reservoir

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	Cloud Peak Reservoir (mm)
1979	274
1980	341
1981	247
1982	397
1983	492
1984	581
1985	350
1986	627
1987	300
1988	421
1989	306
1990	437
1991	441
1992	336
1993	321
1994	463
1995	584
1996	505
1997	501
1998	437
1999	573
2000	411
2001	284
2002	356
2003	404
2004	331
2005	411
2006	318
2007	388
2008	489
2009	488
2010	438
2011	592
2012	392
2013	343
2014	570
2015	333
2016	294
2017	471
2018	434
2019	347
2020	382
2021	428
2022	371
2023	398
2024	399
2025	288
2026	254

Read against the river

Cloud Peak Reservoir and CLEAR CREEK NEAR BUFFALO, WY 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 Clear and what each holds
Gauge	Measures	Values	Record
CLEAR CREEK NEAR BUFFALO, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	263	1917–2026
PINEY CREEK AT KEARNY, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	236	1903–2026
CLEAR CREEK NEAR ARVADA, WY	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	209	1915–2026
PINEY CREEK AT UCROSS, WY	catchment area, annual maximum river flow	43	1916–2026

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 — 10090206. 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
CLEAR CREEK NEAR BUFFALO, 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	2026-10-02
PINEY CREEK AT KEARNY, 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	2026-10-02
CLEAR CREEK NEAR ARVADA, 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	2026-10-02
PINEY CREEK AT UCROSS, 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	2026-10-02

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	3	yes, 3 or more
Years spanned	124	yes, 20 or more
Values held	2,063	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-06318500.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), Clear gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-clear/

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 Clear 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 confidence2025-05-13

Source: USGS — National Water Information System, USGS site 06318500, 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.