The monitoring network within this area

Hydrionis holds 952 values from 3 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

952

Values held

1897–2026

Record spans

Gauges within the Lower Gasconade huc8 subbasin

3 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 Gasconade River at Jerome, MO

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1897–2024.

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	Gasconade River at Jerome, MO (m³/s)
1897	3,398
1904	960
1905	1,274
1915	3,228
1923	439
1924	861
1925	394
1927	1,288
1928	1,730
1929	926
1930	830
1931	212
1932	314
1933	1,773
1934	242
1935	2,175
1937	765
1938	1,073
1939	830
1940	411
1941	1,546
1942	895
1944	354
1945	2,860
1946	2,478
1947	1,699
1948	827
1949	898
1950	1,379
1951	1,181
1953	348
1955	708
1956	861
1957	1,625
1958	1,334
1959	436
1961	1,778
1962	694
1963	779
1964	711
1965	796
1966	1,257
1967	487
1968	711
1969	1,368
1970	643
1972	787
1973	1,328
1975	779
1976	340
1977	697
1978	1,087
1979	1,478
1980	260
1981	821
1982	847
1984	1,291
1985	2,268
1986	1,540
1987	1,133
1988	620
1990	1,464
1992	408
1993	3,115
1995	966
1996	728
1998	1,147
1999	883
2001	861
2002	1,464
2003	282
2004	773
2005	1,070
2006	852
2007	436
2008	3,341
2009	779
2011	2,410
2012	1,376
2013	3,908
2015	1,611
2017	5,578
2018	1,390
2019	1,178
2020	1,376
2021	1,099
2022	1,555
2023	1,699
2024	1,042

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	1897–2024
Completeness	69.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	20 separate periods inside 1897–2024 hold no value. The longest runs from 1906 to 1914 — 9 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1897 and is not continuous from it: 128 years separate the first value from the last, and 70% 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 Gasconade River at Jerome, MO, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1905–2025.

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	Gasconade River at Jerome, MO (mm)
1905	471
1923	235
1924	309
1925	243
1926	234
1927	750
1928	428
1929	370
1930	225
1931	188
1932	167
1933	284
1934	143
1935	495
1936	107
1937	281
1938	355
1939	283
1940	182
1941	307
1942	409
1943	360
1944	186
1945	627
1946	459
1947	277
1948	288
1949	543
1950	500
1951	567
1952	271
1953	140
1954	80.0
1955	165
1956	118
1957	426
1958	356
1959	240
1960	189
1961	340
1962	223
1963	163
1964	120
1965	224
1966	300
1967	279
1968	319
1969	286
1970	303
1971	206
1972	252
1973	533
1974	423
1975	378
1976	127
1977	179
1978	249
1979	403
1980	157
1981	206
1982	416
1983	449
1984	512
1985	780
1986	297
1987	310
1988	326
1989	231
1990	490
1991	340
1992	271
1993	600
1994	428
1995	425
1996	403
1997	290
1998	376
1999	289
2000	75.0
2001	171
2002	362
2003	210
2004	297
2005	227
2006	179
2007	219
2008	597
2009	440
2010	338
2011	464
2012	199
2013	517
2014	153
2015	593
2016	250
2017	440
2018	316
2019	488
2020	599
2021	368
2022	431
2023	315
2024	408
2025	350

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	1905–2025
Completeness	86.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1905–2025 holds no value: 1906 to 1922, 17 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1905 and is not continuous from it: 121 years separate the first value from the last, and 86% 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

Every gauge Hydrionis holds within this area

Gauges within the Lower Gasconade and what each holds
Gauge	Measures	Values	Record
Gasconade River at Jerome, MO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	351	1897–2026
Little Piney Creek at Newburg, MO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	328	1915–2026
Gasconade River near Rich Fountain, MO	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	273	1922–2026

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 — 10290203. 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
Gasconade River at Jerome, MO	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
Little Piney Creek at Newburg, MO	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
Gasconade River near Rich Fountain, MO	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 4 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	130	yes, 20 or more
Values held	952	no
Distinct measurements	5	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-06933500.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), Lower Gasconade gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-lower-gasconade/

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 Lower Gasconade 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 confidence2024-11-06

Source: USGS — National Water Information System, USGS site 06933500, 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.