HydrionisGlobal Water Intelligence
Monitored reservoir

Lake Altus At Lugert, OK

United States Geological Survey reservoir gauge 07302500 in OK, with published storage from 1988.

Storage record07302500

Storage now, against this reservoir's own record

42.22 Mm³
Stored, August 2026
19th
Percentile among 37 Augs on record
-46.5%
Against the Aug 1991–2020 average
-36.0%
Change over the 12 months to 2026-08

Storage in August 2026 was lower than most Augs on record, ranked against 37 other Augs held for this reservoir.

Storage, 1988–2026

Monthly mean storage
442 monthly values, 1988 to 2026
Monthly mean storageMonthly mean storage: Lake Altus At Lugert, OK in Mm³, from 1988.4166666666667 to 2026.5833333333333.050100150200Mm³1988.41666666666671994.51999.16666666666672003.83333333333332008.52013.16666666666672017.83333333333332022.5Year

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
PeriodLake Altus At Lugert, OK (Mm³)
June 1988157
July 1988142
August 198898.2
September 198887.8
October 1988108
November 1988111
December 1988118
January 1989124
February 1989132
March 1989141
April 1989156
May 1989164
June 1989168
March 199061.8
December 1990101
January 1991106
February 1991112
March 1991115
April 1991119
May 1991124
June 1991151
July 1991129
August 199193.5
September 199182.7
October 199185.0
November 199189.8
December 1991103
January 1992124
February 1992137
March 1992149
April 1992160
May 1992165
June 1992168
July 1992162
August 1992140
October 1992128
November 1992129
December 1992141
January 1993154
February 1993165
March 1993167
April 1993167
May 1993169
June 1993166
July 1993149
August 1993119
September 199399.4
October 199396.9
November 199395.9
December 199397.6
January 1994100
February 1994104
March 1994112
April 1994117
May 1994128
June 1994128
July 199495.2
August 199452.0
September 199432.2
October 199431.5
November 199432.9
December 199435.6
January 199536.8
February 199538.9
March 199542.2
April 199547.1
May 199554.6
June 1995158
July 1995162
August 1995163
September 1995148
October 1995166
November 1995167
December 1995168
January 1996168
February 1996167
March 1996167
April 1996166
May 1996147
June 1996140
July 1996130
August 1996113
September 1996136
October 1996158
November 1996166
December 1996167
January 1997167
February 1997170
March 1997166
April 1997177
May 1997169
June 1997168
July 1997159
August 1997137
September 1997143
October 1997160
November 1997167
December 1997167
January 1998167
February 1998167
March 1998171
April 1998167
May 1998166
June 1998153
July 1998108
August 199864.2
September 199844.5
October 199843.2
November 199861.9
December 199871.8
January 199980.7
February 199993.9
March 1999106
April 1999126
May 1999158
June 1999169
July 1999161
August 1999117
September 199984.4
October 199980.4
November 199979.5
December 199981.0
January 200084.5
February 200089.2
March 2000102
April 2000132
May 2000142
June 2000143
July 2000157
August 200098.4
September 200057.1
October 200054.1
November 200063.2
December 200069.1
January 200179.5
February 200196.6
March 2001120
April 2001135
May 2001166
June 2001166
July 2001125
August 200174.3
September 200163.2
October 200161.2
November 200160.5
December 200162.7
January 200266.0
February 200272.6
March 200277.1
April 200283.9
May 200289.6
June 200291.0
July 200285.9
August 200246.3
September 200219.2
October 200220.4
November 200235.1
December 200243.7
January 200353.9
February 200361.9
March 200369.3
April 200374.8
May 200380.5
June 200388.2
July 200377.4
August 200333.6
September 200323.4
October 200326.9
November 200326.9
December 200328.0
January 200431.3
February 200436.8
March 200457.7
April 200471.3
May 200477.5
June 200477.8
July 200477.2
August 200444.2
September 200431.8
October 200434.6
November 200444.1
December 200462.6
January 200576.0
February 200589.5
March 2005100
April 2005107
May 2005114
June 2005124
July 2005106
August 200572.4
September 200562.9
October 200563.5
November 200563.2
December 200563.7
January 200666.1
February 200668.4
March 200671.6
April 200675.2
May 200680.1
June 200680.8
July 200656.7
August 200620.4
September 200615.3
October 200615.9
November 200616.6
December 200618.1
January 200727.5
February 200735.9
March 200746.1
April 200783.9
May 2007145
June 2007170
July 2007162
August 2007125
September 2007105
October 2007108
November 2007109
December 2007114
January 2008121
February 2008128
March 2008137
April 2008145
May 2008150
June 2008147
July 2008117
August 200874.3
September 200863.7
October 200875.8
November 200887.9
December 200894.1
January 2009101
February 2009107
March 2009112
April 2009119
May 2009132
June 2009138
July 2009104
August 200965.2
September 200936.8
October 200937.8
November 200943.1
December 200946.9
January 201052.6
February 201063.7
March 201073.8
April 201084.8
May 2010109
June 2010123
July 2010129
August 201089.1
September 201058.0
October 201056.7
November 201060.7
December 201064.9
January 201169.4
February 201174.1
March 201178.7
April 201180.5
May 201180.3
June 201160.5
July 201139.1
August 201131.4
September 201129.2
October 201128.4
November 201129.6
December 201130.8
January 201230.5
February 201230.9
March 201233.4
April 201237.7
May 201239.5
June 201238.4
July 201234.9
August 201232.4
September 201229.8
October 201228.5
November 201227.4
December 201226.7
January 201326.6
February 201326.5
March 201326.7
April 201327.2
May 201327.0
June 201326.0
July 201324.2
August 201322.0
September 201320.6
October 201320.1
November 201319.9
December 201319.9
January 201419.7
February 201419.3
March 201419.2
April 201418.7
May 201417.7
June 201418.9
July 201419.4
August 201418.5
September 201417.3
October 201416.3
November 201415.8
December 201415.6
January 201515.4
February 201515.3
March 201515.8
April 201519.3
May 201577.9
June 2015162
July 2015155
August 2015121
September 201598.2
October 201597.1
November 2015101
December 2015111
January 2016124
February 2016134
March 2016140
April 2016145
May 2016152
June 2016160
July 2016147
August 201699.8
September 201685.9
October 201688.9
November 201688.9
December 201689.9
January 201794.9
February 2017104
March 2017110
April 2017122
May 2017135
June 2017139
July 2017122
August 201791.9
September 201781.9
October 201795.5
November 2017100
December 2017103
January 2018106
February 2018110
March 2018114
April 2018116
May 2018119
June 2018113
July 201887.6
August 201854.9
September 201836.0
October 201859.4
November 201875.3
December 201880.2
January 201988.2
February 201994.2
March 2019101
April 2019120
May 2019158
June 2019160
July 2019148
August 2019102
September 201969.8
October 201970.7
November 201973.8
December 201978.5
January 202085.1
February 202093.0
March 2020102
April 2020112
May 2020115
June 2020116
July 202094.6
August 202051.9
September 202029.8
October 202028.7
November 202028.4
December 202028.5
January 202130.2
February 202132.2
March 202136.9
April 202143.3
May 202146.3
June 202155.6
July 202168.0
August 202146.1
September 202127.4
October 202126.7
November 202126.0
December 202126.0
January 202226.9
February 202228.8
March 202230.9
April 202232.5
May 202233.1
June 202239.0
July 202237.8
August 202235.3
September 202234.4
October 202232.9
November 202232.6
December 202232.5
January 202332.3
February 202333.0
March 202333.8
April 202333.8
May 202335.1
June 202343.9
July 202352.3
August 202352.6
September 202349.9
October 202347.9
November 202347.3
December 202348.1
January 202452.8
February 202458.0
March 202461.8
April 202464.9
May 202468.1
June 202468.4
July 202467.7
August 202465.2
September 202462.4
October 202459.9
November 202468.3
December 202479.0
January 202582.9
February 202586.1
March 202590.3
April 202594.0
May 2025111
June 2025121
July 2025111
August 202566.0
September 202540.9
October 202539.1
November 202538.0
December 202537.9
January 202638.8
February 202640.5
March 202641.9
April 202643.1
May 202642.1
June 202641.6
July 202644.8
August 202642.2

The reservoir's year

Seasonal storage profile
Each calendar month's reference average, against the most recent year
Seasonal storage profileSeasonal storage profile: 1991–2020 average, Most recent 12 months in Mm³, from 1 to 12.050100Mm³123456789101112Month1991–2020 average 1: 84.1 Mm³1991–2020 average 2: 90.2 Mm³1991–2020 average 3: 96.8 Mm³1991–2020 average 4: 105 Mm³1991–2020 average 5: 116 Mm³1991–2020 average 6: 125 Mm³1991–2020 average 7: 111 Mm³1991–2020 average 8: 79.0 Mm³1991–2020 average 9: 62.3 Mm³1991–2020 average 10: 67.9 Mm³1991–2020 average 11: 72.0 Mm³1991–2020 average 12: 76.1 Mm³Most recent 12 months 1: 38.8 Mm³Most recent 12 months 2: 40.5 Mm³Most recent 12 months 3: 41.9 Mm³Most recent 12 months 4: 43.1 Mm³Most recent 12 months 5: 42.1 Mm³Most recent 12 months 6: 41.6 Mm³Most recent 12 months 7: 44.8 Mm³Most recent 12 months 8: 42.2 Mm³Most recent 12 months 9: 40.9 Mm³Most recent 12 months 10: 39.1 Mm³Most recent 12 months 11: 38.0 Mm³Most recent 12 months 12: 37.9 Mm³
  • 1991–2020 average
  • Most recent 12 months

Twelve separate averages, one per calendar month. A January average describes Januaries only. Months are plotted 1–12.

View the data behind this chart
Underlying data
Period1991–2020 average (Mm³)Most recent 12 months (Mm³)
Jan84.138.8
Feb90.240.5
Mar96.841.9
Apr10543.1
May11642.1
Jun12541.6
Jul11144.8
Aug79.042.2
Sep62.340.9
Oct67.939.1
Nov72.038.0
Dec76.137.9

Rate and persistence

-1.98 Mm³
Mean drawdown per month over 12 months
6 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

Lake Altus At Lugert, OK
Gauge location
Lake Altus At Lugert, OKLake Altus At Lugert, OK — 42.22 Mm³Lake Altus At Lugert, OK — 42.22 Mm³

Where this comes from

442 monthly observations 1988–2026 Mm³
Spatially aggregatedHigh confidenceAugust 2026

Source: USGS — National Water Information System, 07302500. 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.

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