The monitoring network within this area

Hydrionis holds 473 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

473

Values held

1926–2026

Record spans

Gauges within the North Fork Shenandoah 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 N F SHENANDOAH RIVER NEAR STRASBURG, VA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1926–2025.

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	N F SHENANDOAH RIVER NEAR STRASBURG, VA (m³/s)
1926	204
1928	402
1929	442
1931	78.7
1932	272
1933	459
1934	176
1936	2,520
1937	705
1939	402
1940	191
1941	203
1942	606
1944	249
1945	680
1946	191
1947	114
1948	191
1950	221
1952	439
1954	326
1955	1,022
1956	105
1957	248
1958	122
1959	379
1961	252
1962	274
1963	464
1964	234
1965	263
1966	116
1967	425
1968	185
1969	228
1970	252
1971	450
1972	711
1973	510
1975	739
1976	408
1978	504
1979	419
1981	54.7
1982	274
1983	279
1984	487
1985	219
1987	561
1988	317
1989	151
1990	145
1991	413
1992	442
1993	603
1994	416
1995	320
1996	3,228
1997	297
1998	396
1999	105
2000	73.6
2001	377
2002	289
2003	617
2004	365
2005	163
2006	365
2008	127
2009	144
2010	433
2011	603
2012	439
2014	428
2015	190
2016	229
2017	236
2018	552
2020	170
2022	216
2024	246
2025	326

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	1926–2025
Completeness	82.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	18 separate periods inside 1926–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1926 and is not continuous from it: 100 years separate the first value from the last, and 82% 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 N F SHENANDOAH RIVER AT COOTES STORE, VA, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1926–2025.

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	N F SHENANDOAH RIVER AT COOTES STORE, VA (mm)
1926	340
1927	326
1928	266
1929	393
1930	83.0
1931	149
1932	318
1933	336
1934	179
1935	370
1936	460
1937	507
1938	149
1939	318
1940	296
1941	133
1942	544
1943	301
1944	277
1945	328
1946	249
1947	136
1948	429
1949	455
1950	331
1951	333
1952	453
1953	310
1954	269
1955	299
1956	150
1957	237
1958	324
1959	224
1960	364
1961	371
1962	325
1963	220
1964	249
1965	273
1966	218
1967	317
1968	218
1969	182
1970	348
1971	380
1972	656
1973	531
1974	266
1975	403
1976	274
1977	241
1978	399
1979	656
1980	281
1981	119
1982	333
1983	437
1984	378
1985	453
1986	166
1987	405
1988	193
1989	323
1990	296
1991	272
1992	313
1993	409
1994	441
1995	346
1996	851
1997	232
1998	464
1999	163
2000	202
2001	254
2002	246
2003	609
2004	429
2005	266
2006	362
2007	293
2008	204
2009	250
2010	275
2011	587
2012	253
2013	425
2014	279
2015	317
2016	308
2017	204
2018	947
2019	303
2020	312
2021	255
2022	249
2023	127
2024	331
2025	348

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	1926–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1926 to 2025 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 North Fork Shenandoah and what each holds
Gauge	Measures	Values	Record
N F SHENANDOAH RIVER NEAR STRASBURG, VA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	237	1926–2026
N F SHENANDOAH RIVER AT COOTES STORE, VA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	236	1926–2026

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 — 02070006. 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
N F SHENANDOAH RIVER NEAR STRASBURG, VA	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
N F SHENANDOAH RIVER AT COOTES STORE, VA	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	101	yes, 20 or more
Values held	473	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-01634000.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), North Fork Shenandoah gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-north-fork-shenandoah/

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 North Fork Shenandoah 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 01634000, 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.