Lk Arlington, TX — storage

Storage now, against this reservoir's own record

22.65 Mm³

Stored, September 1998

0th

Percentile among 42 Seps on record

-21.1%

Change over the 12 months to 1998-09

Storage in September 1998 was lower than almost every other Sep on record, ranked against 42 other Seps held for this reservoir. It is the lowest in the held record for this month.

Storage, 1957–1998

Monthly mean storage

498 monthly values, 1957 to 1998

Monthly means of the publisher's daily record. Volume, not percentage of capacity: without a capacity whose definition is stated, fullness cannot be computed.

View the data behind this chart

Underlying data
Period	Lk Arlington At Arlington, TX (Mm³)
April 1957	13.3
May 1957	60.3
June 1957	57.5
July 1957	55.3
August 1957	53.1
September 1957	52.7
October 1957	55.1
November 1957	57.2
December 1957	56.7
January 1958	56.6
February 1958	56.4
March 1958	56.9
April 1958	57.5
May 1958	57.6
June 1958	55.4
July 1958	55.5
August 1958	53.6
September 1958	54.2
October 1958	56.8
November 1958	56.1
December 1958	56.0
January 1959	55.8
February 1959	55.9
March 1959	55.6
April 1959	55.8
May 1959	55.9
June 1959	56.2
July 1959	55.9
August 1959	53.7
September 1959	51.7
October 1959	56.0
November 1959	56.0
December 1959	55.8
January 1960	57.1
February 1960	56.4
March 1960	56.2
April 1960	55.7
May 1960	55.8
June 1960	54.6
July 1960	53.0
August 1960	51.2
September 1960	48.9
October 1960	47.2
November 1960	45.9
December 1960	45.7
January 1961	48.9
February 1961	51.7
March 1961	53.7
April 1961	55.7
May 1961	55.0
June 1961	55.7
July 1961	56.1
August 1961	53.7
September 1961	51.9
October 1961	51.2
November 1961	50.3
December 1961	50.7
January 1962	50.3
February 1962	50.0
March 1962	50.0
April 1962	49.9
May 1962	49.9
June 1962	49.4
July 1962	49.5
August 1962	50.6
September 1962	54.4
October 1962	54.5
November 1962	53.7
December 1962	53.4
January 1963	53.4
February 1963	53.4
March 1963	52.5
April 1963	51.8
May 1963	55.8
June 1963	54.4
July 1963	52.4
August 1963	49.5
September 1963	48.0
October 1963	46.4
November 1963	44.4
December 1963	43.4
January 1964	42.6
February 1964	43.3
March 1964	45.3
April 1964	48.2
May 1964	50.1
June 1964	50.0
July 1964	46.3
August 1964	43.2
September 1964	42.6
October 1964	44.9
November 1964	47.9
December 1964	50.8
January 1965	52.4
February 1965	57.5
March 1965	56.4
April 1965	56.3
May 1965	58.1
June 1965	56.1
July 1965	53.2
August 1965	49.4
September 1965	47.2
October 1965	46.5
November 1965	45.9
December 1965	44.9
January 1966	44.1
February 1966	45.7
March 1966	46.0
April 1966	48.2
May 1966	57.4
June 1966	56.2
July 1966	54.4
August 1966	51.7
September 1966	52.2
October 1966	55.9
November 1966	54.5
December 1966	53.2
January 1967	52.3
February 1967	51.2
March 1967	50.3
April 1967	49.6
May 1967	49.0
June 1967	49.0
July 1967	47.3
August 1967	43.8
September 1967	42.3
October 1967	42.1
November 1967	41.1
December 1967	40.4
January 1968	42.1
February 1968	46.5
March 1968	53.7
April 1968	56.4
May 1968	57.3
June 1968	55.8
July 1968	54.1
August 1968	50.8
September 1968	47.9
October 1968	45.9
November 1968	44.2
December 1968	43.6
January 1969	42.4
February 1969	41.7
March 1969	42.7
April 1969	43.5
May 1969	55.5
June 1969	54.7
July 1969	49.8
August 1969	45.5
September 1969	43.0
October 1969	41.9
November 1969	42.7
December 1969	42.5
January 1970	42.7
February 1970	43.8
March 1970	54.9
April 1970	56.8
May 1970	56.2
June 1970	55.7
July 1970	50.9
August 1970	45.7
September 1970	44.9
October 1970	44.1
November 1970	42.5
December 1970	40.6
January 1971	38.9
February 1971	37.1
March 1971	35.4
April 1971	33.4
May 1971	31.9
June 1971	29.4
July 1971	25.4
August 1971	25.4
September 1971	23.5
October 1971	28.6
November 1971	36.6
December 1971	51.0
January 1972	55.7
February 1972	54.8
March 1972	53.0
April 1972	50.8
May 1972	52.9
June 1972	49.5
July 1972	44.7
August 1972	38.9
September 1972	34.5
October 1972	31.8
November 1972	33.7
December 1972	32.1
January 1973	31.6
February 1973	33.8
March 1973	35.5
April 1973	40.5
May 1973	52.6
June 1973	57.3
July 1973	55.5
August 1973	54.2
September 1973	50.2
October 1973	52.9
November 1973	54.6
December 1973	53.6
January 1974	52.7
February 1974	52.3
March 1974	51.3
April 1974	48.9
May 1974	50.7
June 1974	49.3
July 1974	43.9
August 1974	39.6
September 1974	41.2
October 1974	44.3
November 1974	54.2
December 1974	54.5
January 1975	53.8
February 1975	55.3
March 1975	54.7
April 1975	56.8
May 1975	56.3
June 1975	56.8
July 1975	52.6
August 1975	50.3
September 1975	45.4
October 1975	40.8
November 1975	37.4
December 1975	37.7
January 1976	40.8
February 1976	44.4
March 1976	44.0
April 1976	48.9
May 1976	56.2
June 1976	55.7
July 1976	52.4
August 1976	46.7
September 1976	42.4
October 1976	40.1
November 1976	39.4
December 1976	38.4
January 1977	37.5
February 1977	39.2
March 1977	44.4
April 1977	57.9
May 1977	55.1
June 1977	49.7
July 1977	43.0
August 1977	38.5
September 1977	34.4
October 1977	33.7
November 1977	37.2
December 1977	38.0
January 1978	38.9
February 1978	42.2
March 1978	44.4
April 1978	45.6
May 1978	46.9
June 1978	46.4
July 1978	39.5
August 1978	36.7
September 1978	32.9
October 1978	33.6
November 1978	36.3
December 1978	38.2
January 1979	40.3
February 1979	43.1
March 1979	49.9
April 1979	56.3
May 1979	57.8
June 1979	55.9
July 1979	50.0
August 1979	54.7
September 1979	47.9
October 1979	42.0
November 1979	38.8
December 1979	40.8
January 1980	43.6
February 1980	44.6
March 1980	46.2
April 1980	51.8
May 1980	55.1
June 1980	50.6
July 1980	40.2
August 1980	32.9
September 1980	29.8
October 1980	37.2
November 1980	39.3
December 1980	42.3
January 1981	42.8
February 1981	44.3
March 1981	46.8
April 1981	48.6
May 1981	50.4
June 1981	50.9
July 1981	48.6
August 1981	41.4
September 1981	40.9
October 1981	50.0
November 1981	55.6
December 1981	52.0
January 1982	48.1
February 1982	48.8
March 1982	48.8
April 1982	48.2
May 1982	53.8
June 1982	56.1
July 1982	52.5
August 1982	44.3
September 1982	37.3
October 1982	36.8
November 1982	37.2
December 1982	38.4
January 1983	40.5
February 1983	41.4
March 1983	42.6
April 1983	45.7
May 1983	48.6
June 1983	53.2
July 1983	53.8
August 1983	49.4
September 1983	45.2
October 1983	42.0
November 1983	38.5
December 1983	38.1
January 1984	35.4
February 1984	38.2
March 1984	46.6
April 1984	51.3
May 1984	48.8
June 1984	46.8
July 1984	41.8
August 1984	38.2
September 1984	34.0
October 1984	37.7
November 1984	42.0
December 1984	45.0
January 1985	50.8
February 1985	51.7
March 1985	52.6
April 1985	54.0
May 1985	56.4
June 1985	53.1
July 1985	47.6
August 1985	38.5
September 1985	30.6
October 1985	28.8
November 1985	35.1
December 1985	37.2
January 1986	36.7
February 1986	40.0
March 1986	42.5
April 1986	44.0
May 1986	48.8
June 1986	49.4
July 1986	41.4
August 1986	32.7
September 1986	31.5
October 1986	28.4
November 1986	30.0
December 1986	34.7
January 1987	40.0
February 1987	44.9
March 1987	48.4
April 1987	46.8
May 1987	48.0
June 1987	49.0
July 1987	46.5
August 1987	35.3
September 1987	28.4
October 1987	26.0
November 1987	26.4
December 1987	29.3
January 1988	31.3
February 1988	30.7
March 1988	32.9
April 1988	33.6
May 1988	34.2
June 1988	36.9
July 1988	34.5
August 1988	27.4
September 1988	25.6
October 1988	30.2
November 1988	32.3
December 1988	34.2
January 1989	33.1
February 1989	35.2
March 1989	36.1
April 1989	39.1
May 1989	51.6
June 1989	50.4
July 1989	44.6
August 1989	38.4
September 1989	31.7
October 1989	28.4
November 1989	27.2
December 1989	26.2
January 1990	26.1
February 1990	38.0
March 1990	44.9
April 1990	50.7
May 1990	52.0
June 1990	46.2
July 1990	38.3
August 1990	37.8
September 1990	29.8
October 1990	27.8
November 1990	29.7
December 1990	31.9
January 1991	34.8
February 1991	35.9
March 1991	36.1
April 1991	40.6
May 1991	45.9
June 1991	47.8
July 1991	40.8
August 1991	38.0
September 1991	36.5
October 1991	36.0
November 1991	49.4
December 1991	53.2
January 1992	50.2
February 1992	50.5
March 1992	49.8
April 1992	46.9
May 1992	46.2
June 1992	49.6
July 1992	45.8
August 1992	40.4
September 1992	36.6
October 1992	34.0
November 1992	35.3
December 1992	41.6
January 1993	42.6
February 1993	45.3
March 1993	50.0
April 1993	49.5
May 1993	47.7
June 1993	45.8
July 1993	43.4
August 1993	31.3
September 1993	26.5
October 1993	38.1
November 1993	45.7
December 1993	49.0
January 1994	48.5
February 1994	48.1
March 1994	48.8
April 1994	46.2
May 1994	49.5
June 1994	46.1
July 1994	41.5
August 1994	35.4
September 1994	32.3
October 1994	31.3
November 1994	37.9
December 1994	41.2
January 1995	42.5
February 1995	43.8
March 1995	48.0
April 1995	51.1
May 1995	50.4
June 1995	48.8
July 1995	43.3
August 1995	38.1
September 1995	33.7
October 1995	32.1
November 1995	29.8
December 1995	28.0
January 1996	28.6
February 1996	32.3
March 1996	35.7
April 1996	41.0
May 1996	40.6
June 1996	37.5
July 1996	36.6
August 1996	35.5
September 1996	36.1
October 1996	33.8
November 1996	37.6
December 1996	41.0
January 1997	40.3
February 1997	44.7
March 1997	47.9
April 1997	48.4
May 1997	47.9
June 1997	47.2
July 1997	44.0
August 1997	36.5
September 1997	28.7
October 1997	25.2
November 1997	29.1
December 1997	37.1
January 1998	47.5
February 1998	47.4
March 1998	48.6
April 1998	45.9
May 1998	42.5
June 1998	39.3
July 1998	29.0
August 1998	21.2
September 1998	22.6

Rate and persistence

-0.51 Mm³

Mean drawdown per month over 12 months

10 of 24

Months in the last two years below the 20th percentile for their own month

Rates are computed only across an unbroken run of months, so a rate is never divided by a period in which some of the change was not observed. Percentile counts compare each month with the same calendar month in every other year held.

Location

Lk Arlington At Arlington, TX

Gauge location

Where this comes from

498 monthly observations 1957–1998 Mm³

Spatially aggregatedHigh confidenceSeptember 1998

Source: USGS — National Water Information System, 08049200. Licence: Open.

Method: Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Reservoir storage is managed as well as observed: a drawdown may reflect an operating rule, flood-control rule curve or scheduled release rather than a shortage. Compare a month against the same month in other years, and do not read a fall as a supply signal without knowing the operating regime.

Retrieved 25 August 2026.

Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.