HydrionisGlobal Water Intelligence
HUC8 subbasin

Middle Pearl-Strong

2 monitoring stations within this area in United States, holding 427 values between 1874 and 2026. A United States federal hydrologic unit at the eight-digit subbasin level — a drainage area, not a river. Many subbasins take the name of the largest river within them, and the gauges below are anywhere inside the area, including on tributaries.

United StatesHUC8 subbasin

The monitoring network within this area

Hydrionis holds 427 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
427
Values held
1874–2026
Record spans
Gauges within the Middle Pearl-Strong huc8 subbasin
2 monitoring points, positioned as the publisher records them.
Gauges within the Middle Pearl-Strong huc8 subbasinPEARL RIVER AT JACKSON, MS, STRONG RIVER AT D`LO, MSPEARL RIVER AT JACKSON, MSSTRONG RIVER AT D`LO, MS

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 PEARL RIVER AT JACKSON, MS
The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1874–2023.
Shading marks when something was recorded, not what caused the line.
Largest measured flow of each year at PEARL RIVER AT JACKSON, MSLargest measured flow of each year at PEARL RIVER AT JACKSON, MS: PEARL RIVER AT JACKSON, MS in m³/s, from 1874 to 2023.Hurricane Katrina water and sanitation collapse01,0002,0003,0004,000m³/s18741915193119481964198019952012

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.

EventTypePeriodStandingAuthority
Hurricane Katrina water and sanitation collapseFlood2005-08-29 – 2005-09-30Documented 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
PeriodPEARL RIVER AT JACKSON, MS (m³/s)
18742,265
18801,982
19002,124
19022,407
19031,235
1904150
1905705
1906736
1908736
19091,651
1910255
1911413
1912838
1913697
1914847
1915572
1916572
1917561
1918433
1919617
19211,070
1922685
1923813
1924578
1925685
1926586
1927759
1928745
1929866
1930833
1931428
1932603
1934527
19351,606
1936974
1937646
1938909
1939544
1940852
1942219
1943544
19441,322
19451,045
19461,405
1947736
1948725
19491,085
19501,266
19511,390
1952187
1953807
1954300
1955779
1956830
1957626
19581,102
1959385
1960640
19611,303
1963182
1964680
1965816
1966756
1967230
19691,269
1970518
1971909
1972895
1973946
19741,141
1975974
19761,427
19771,385
1978861
19793,625
19801,467
1981708
1982564
19832,251
1984600
1985699
1986391
1987915
1988515
1989702
19901,076
19911,308
1992294
1993592
1994949
19951,229
1996966
1997739
1998889
1999932
2000810
2001858
2002493
20031,419
2004923
2006807
2007597
2008445
2009674
2011940
2012620
2013912
20141,223
2015527
20161,042
20171,130
2018501
2019940
20202,189
2021697
20221,603
20230

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 existMeasured
Period held1874–2023
Completeness78.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps
  • 11 separate periods inside 1874–2023 hold no value. The longest runs from 1881 to 1899 — 19 years with no reading. They are drawn as breaks in the line and are never interpolated across.
ContinuityThe record begins in 1874 and is not continuous from it: 150 years separate the first value from the last, and 78% of the years between them are held. The span is not the record.
Last read from the publisher2026-08-31
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow 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 STRONG RIVER AT D`LO, MS, as a depth
The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1929–2025.
Shading marks when something was recorded, not what caused the line.
Water leaving the catchment above STRONG RIVER AT D`LO, MS, as a depthWater leaving the catchment above STRONG RIVER AT D`LO, MS, as a depth: STRONG RIVER AT D`LO, MS in mm, from 1929 to 2025.Hurricane Katrina water and sanitation collapse02505007501,000mm19291939194919591969200220122023STRONG RIVER AT D`LO, MS 1929: 543 mmSTRONG RIVER AT D`LO, MS 1930: 491 mmSTRONG RIVER AT D`LO, MS 1931: 365 mmSTRONG RIVER AT D`LO, MS 1932: 666 mmSTRONG RIVER AT D`LO, MS 1933: 512 mmSTRONG RIVER AT D`LO, MS 1934: 276 mmSTRONG RIVER AT D`LO, MS 1935: 511 mmSTRONG RIVER AT D`LO, MS 1936: 360 mmSTRONG RIVER AT D`LO, MS 1937: 422 mmSTRONG RIVER AT D`LO, MS 1938: 456 mmSTRONG RIVER AT D`LO, MS 1939: 370 mmSTRONG RIVER AT D`LO, MS 1940: 678 mmSTRONG RIVER AT D`LO, MS 1941: 299 mmSTRONG RIVER AT D`LO, MS 1942: 250 mmSTRONG RIVER AT D`LO, MS 1943: 320 mmSTRONG RIVER AT D`LO, MS 1944: 543 mmSTRONG RIVER AT D`LO, MS 1945: 560 mmSTRONG RIVER AT D`LO, MS 1946: 494 mmSTRONG RIVER AT D`LO, MS 1947: 553 mmSTRONG RIVER AT D`LO, MS 1948: 562 mmSTRONG RIVER AT D`LO, MS 1949: 682 mmSTRONG RIVER AT D`LO, MS 1950: 652 mmSTRONG RIVER AT D`LO, MS 1951: 430 mmSTRONG RIVER AT D`LO, MS 1952: 140 mmSTRONG RIVER AT D`LO, MS 1953: 598 mmSTRONG RIVER AT D`LO, MS 1954: 209 mmSTRONG RIVER AT D`LO, MS 1955: 366 mmSTRONG RIVER AT D`LO, MS 1956: 369 mmSTRONG RIVER AT D`LO, MS 1957: 437 mmSTRONG RIVER AT D`LO, MS 1958: 528 mmSTRONG RIVER AT D`LO, MS 1959: 357 mmSTRONG RIVER AT D`LO, MS 1960: 354 mmSTRONG RIVER AT D`LO, MS 1961: 817 mmSTRONG RIVER AT D`LO, MS 1962: 407 mmSTRONG RIVER AT D`LO, MS 1963: 162 mmSTRONG RIVER AT D`LO, MS 1964: 549 mmSTRONG RIVER AT D`LO, MS 1965: 330 mmSTRONG RIVER AT D`LO, MS 1966: 418 mmSTRONG RIVER AT D`LO, MS 1967: 226 mmSTRONG RIVER AT D`LO, MS 1968: 344 mmSTRONG RIVER AT D`LO, MS 1969: 289 mmSTRONG RIVER AT D`LO, MS 1970: 254 mmSTRONG RIVER AT D`LO, MS 1994: 654 mmSTRONG RIVER AT D`LO, MS 1995: 393 mmSTRONG RIVER AT D`LO, MS 1996: 384 mmSTRONG RIVER AT D`LO, MS 1997: 751 mmSTRONG RIVER AT D`LO, MS 1998: 570 mmSTRONG RIVER AT D`LO, MS 1999: 241 mmSTRONG RIVER AT D`LO, MS 2000: 108 mmSTRONG RIVER AT D`LO, MS 2001: 470 mmSTRONG RIVER AT D`LO, MS 2002: 479 mmSTRONG RIVER AT D`LO, MS 2003: 555 mmSTRONG RIVER AT D`LO, MS 2004: 766 mmSTRONG RIVER AT D`LO, MS 2005: 448 mmSTRONG RIVER AT D`LO, MS 2006: 317 mmSTRONG RIVER AT D`LO, MS 2007: 130 mmSTRONG RIVER AT D`LO, MS 2008: 389 mmSTRONG RIVER AT D`LO, MS 2009: 552 mmSTRONG RIVER AT D`LO, MS 2010: 321 mmSTRONG RIVER AT D`LO, MS 2011: 330 mmSTRONG RIVER AT D`LO, MS 2012: 419 mmSTRONG RIVER AT D`LO, MS 2013: 619 mmSTRONG RIVER AT D`LO, MS 2014: 642 mmSTRONG RIVER AT D`LO, MS 2015: 463 mmSTRONG RIVER AT D`LO, MS 2017: 455 mmSTRONG RIVER AT D`LO, MS 2018: 559 mmSTRONG RIVER AT D`LO, MS 2019: 794 mmSTRONG RIVER AT D`LO, MS 2020: 726 mmSTRONG RIVER AT D`LO, MS 2021: 590 mmSTRONG RIVER AT D`LO, MS 2022: 472 mmSTRONG RIVER AT D`LO, MS 2023: 497 mmSTRONG RIVER AT D`LO, MS 2024: 519 mmSTRONG RIVER AT D`LO, MS 2025: 555 mm

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.

EventTypePeriodStandingAuthority
Hurricane Katrina water and sanitation collapseFlood2005-08-29 – 2005-09-30Documented 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
PeriodSTRONG RIVER AT D`LO, MS (mm)
1929543
1930491
1931365
1932666
1933512
1934276
1935511
1936360
1937422
1938456
1939370
1940678
1941299
1942250
1943320
1944543
1945560
1946494
1947553
1948562
1949682
1950652
1951430
1952140
1953598
1954209
1955366
1956369
1957437
1958528
1959357
1960354
1961817
1962407
1963162
1964549
1965330
1966418
1967226
1968344
1969289
1970254
1994654
1995393
1996384
1997751
1998570
1999241
2000108
2001470
2002479
2003555
2004766
2005448
2006317
2007130
2008389
2009552
2010321
2011330
2012419
2013619
2014642
2015463
2017455
2018559
2019794
2020726
2021590
2022472
2023497
2024519
2025555

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 existDerived Computed by Hydrionis
Period held1929–2025
Completeness75.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps
  • 2 separate periods inside 1929–2025 hold no value. The longest runs from 1971 to 1993 — 23 years with no reading. They are drawn as breaks in the line and are never interpolated across.
ContinuityThe record begins in 1929 and is not continuous from it: 97 years separate the first value from the last, and 75% of the years between them are held. The span is not the record.
Last read from the publisher2026-08-24
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow this was produced

Every gauge Hydrionis holds within this area

GaugeMeasuresValuesRecord
PEARL RIVER AT JACKSON, MSburned area within 50 km, catchment area, annual maximum river flow, mean river flow2201874–2026
STRONG RIVER AT D`LO, MSburned area within 50 km, catchment area, annual maximum river flow, mean river flow2071929–2026

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 — 03180002. 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.

GaugeEvidenceEstablished
PEARL RIVER AT JACKSON, MSStated 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/42026-08-26
STRONG RIVER AT D`LO, MSStated 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/42026-08-26

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.

SignalHeldCounts
Gauges holding a real record2no
Years spanned153yes, 20 or more
Values held427no
Distinct measurements4yes, 2 or more
Publishers measuring it2yes, 2 or more
Official identifiers1recorded, not counted

Use this data

Use this data

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 Pearl-Strong gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-middle-pearl-strong/

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 Pearl-Strong 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 confidence2023-02-15

Source: USGS — National Water Information System, USGS site 02486000, 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.

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