Country: USA
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Lake J. B. Thomas water level history

Daily records since 2000 · Level today: 2,226.38 ft

Highest on record
2,251.94 ft
Jul 11, 2015
Lowest on record
131.05 ft
Sep 30, 2000
Today
2,226.38 ft
Oct 23, 2026
Years of data
26
since 2000

In short

Across 22 complete years, 2013 had the lowest average level (2,204.62 ft) and 2016 the highest (2,247.61 ft).

On average the lake is lowest in September (2,222.72 ft) and highest in December (2,225.98 ft).

Lake J. B. Thomas level, all years

Loading chart…

Measured Normal range for the date (middle 50% of past years)

Each year's lowest and highest level

45981,1911,7852,37920002003200620092012201520182021202420262000: lowest 131.05 ft (2000-09-30), highest 2,221.49 ft (2000-11-01), average 2,198.06 ft, 93 days measured2001: lowest 2,214.40 ft (2001-09-20), highest 2,220.17 ft (2001-01-01), average 2,217.26 ft, 359 days measured2002: lowest 2,216.16 ft (2002-03-19), highest 2,218.33 ft (2002-07-13), average 2,217.07 ft, 362 days measured2003: lowest 2,215.53 ft (2003-05-19), highest 2,219.48 ft (2003-06-10), average 2,217.36 ft, 365 days measured2004: lowest 2,216.78 ft (2004-02-22), highest 2,232.48 ft (2004-12-07), average 2,220.32 ft, 365 days measured2005: lowest 2,228.54 ft (2005-08-12), highest 2,234.44 ft (2005-08-19), average 2,231.76 ft, 355 days measured2006: lowest 2,222.64 ft (2006-12-28), highest 2,231.60 ft (2006-01-02), average 2,226.92 ft, 342 days measured2007: lowest 2,220.47 ft (2007-04-28), highest 2,224.59 ft (2007-08-22), average 2,222.63 ft, 269 days measured2008: lowest 2,215.51 ft (2008-09-08), highest 2,219.01 ft (2008-09-20), average 2,217.77 ft, 121 days measured2009: lowest 2,212.39 ft (2009-12-20), highest 2,216.72 ft (2009-01-01), average 2,214.47 ft, 337 days measured2010: lowest 2,212.21 ft (2010-01-26), highest 2,216.76 ft (2010-04-23), average 2,214.59 ft, 351 days measured2011: lowest 2,205.24 ft (2011-12-31), highest 2,213.53 ft (2011-01-01), average 2,209.37 ft, 354 days measured2012: lowest 2,200.62 ft (2012-09-26), highest 2,205.27 ft (2012-01-10), average 2,203.41 ft, 290 days measured2013: lowest 2,200.92 ft (2013-05-25), highest 2,207.35 ft (2013-08-19), average 2,204.62 ft, 354 days measured2014: lowest 2,203.80 ft (2014-05-22), highest 2,239.94 ft (2014-09-27), average 2,214.83 ft, 363 days measured2015: lowest 2,238.51 ft (2015-04-11), highest 2,251.94 ft (2015-07-11), average 2,246.38 ft, 365 days measured2016: lowest 2,245.63 ft (2016-11-01), highest 2,249.43 ft (2016-01-01), average 2,247.61 ft, 366 days measured2017: lowest 2,240.56 ft (2017-12-31), highest 2,246.64 ft (2017-01-19), average 2,243.92 ft, 362 days measured2018: lowest 2,234.69 ft (2018-09-05), highest 2,240.54 ft (2018-01-01), average 2,237.20 ft, 362 days measured2019: lowest 2,229.26 ft (2019-12-31), highest 2,235.42 ft (2019-01-01), average 2,232.59 ft, 358 days measured2020: lowest 2,221.94 ft (2020-12-30), highest 2,229.49 ft (2020-03-19), average 2,226.53 ft, 364 days measured2021: lowest 2,219.41 ft (2021-05-15), highest 2,240.76 ft (2021-07-14), average 2,230.46 ft, 365 days measured2022: lowest 2,228.68 ft (2022-12-30), highest 2,236.96 ft (2022-01-01), average 2,232.71 ft, 365 days measured2023: lowest 2,225.05 ft (2023-10-03), highest 2,228.66 ft (2023-01-01), average 2,227.08 ft, 365 days measured2024: lowest 2,223.63 ft (2024-08-29), highest 2,238.49 ft (2024-11-22), average 2,229.52 ft, 365 days measured2025: lowest 2,232.12 ft (2025-12-31), highest 2,237.92 ft (2025-01-01), average 2,235.25 ft, 365 days measured2026: lowest 2,225.56 ft (2026-10-14), highest 2,232.12 ft (2026-01-02), average 2,229.24 ft, 294 days measured
45981,1911,7852,379200020072014202120262000: lowest 131.05 ft (2000-09-30), highest 2,221.49 ft (2000-11-01), average 2,198.06 ft, 93 days measured2001: lowest 2,214.40 ft (2001-09-20), highest 2,220.17 ft (2001-01-01), average 2,217.26 ft, 359 days measured2002: lowest 2,216.16 ft (2002-03-19), highest 2,218.33 ft (2002-07-13), average 2,217.07 ft, 362 days measured2003: lowest 2,215.53 ft (2003-05-19), highest 2,219.48 ft (2003-06-10), average 2,217.36 ft, 365 days measured2004: lowest 2,216.78 ft (2004-02-22), highest 2,232.48 ft (2004-12-07), average 2,220.32 ft, 365 days measured2005: lowest 2,228.54 ft (2005-08-12), highest 2,234.44 ft (2005-08-19), average 2,231.76 ft, 355 days measured2006: lowest 2,222.64 ft (2006-12-28), highest 2,231.60 ft (2006-01-02), average 2,226.92 ft, 342 days measured2007: lowest 2,220.47 ft (2007-04-28), highest 2,224.59 ft (2007-08-22), average 2,222.63 ft, 269 days measured2008: lowest 2,215.51 ft (2008-09-08), highest 2,219.01 ft (2008-09-20), average 2,217.77 ft, 121 days measured2009: lowest 2,212.39 ft (2009-12-20), highest 2,216.72 ft (2009-01-01), average 2,214.47 ft, 337 days measured2010: lowest 2,212.21 ft (2010-01-26), highest 2,216.76 ft (2010-04-23), average 2,214.59 ft, 351 days measured2011: lowest 2,205.24 ft (2011-12-31), highest 2,213.53 ft (2011-01-01), average 2,209.37 ft, 354 days measured2012: lowest 2,200.62 ft (2012-09-26), highest 2,205.27 ft (2012-01-10), average 2,203.41 ft, 290 days measured2013: lowest 2,200.92 ft (2013-05-25), highest 2,207.35 ft (2013-08-19), average 2,204.62 ft, 354 days measured2014: lowest 2,203.80 ft (2014-05-22), highest 2,239.94 ft (2014-09-27), average 2,214.83 ft, 363 days measured2015: lowest 2,238.51 ft (2015-04-11), highest 2,251.94 ft (2015-07-11), average 2,246.38 ft, 365 days measured2016: lowest 2,245.63 ft (2016-11-01), highest 2,249.43 ft (2016-01-01), average 2,247.61 ft, 366 days measured2017: lowest 2,240.56 ft (2017-12-31), highest 2,246.64 ft (2017-01-19), average 2,243.92 ft, 362 days measured2018: lowest 2,234.69 ft (2018-09-05), highest 2,240.54 ft (2018-01-01), average 2,237.20 ft, 362 days measured2019: lowest 2,229.26 ft (2019-12-31), highest 2,235.42 ft (2019-01-01), average 2,232.59 ft, 358 days measured2020: lowest 2,221.94 ft (2020-12-30), highest 2,229.49 ft (2020-03-19), average 2,226.53 ft, 364 days measured2021: lowest 2,219.41 ft (2021-05-15), highest 2,240.76 ft (2021-07-14), average 2,230.46 ft, 365 days measured2022: lowest 2,228.68 ft (2022-12-30), highest 2,236.96 ft (2022-01-01), average 2,232.71 ft, 365 days measured2023: lowest 2,225.05 ft (2023-10-03), highest 2,228.66 ft (2023-01-01), average 2,227.08 ft, 365 days measured2024: lowest 2,223.63 ft (2024-08-29), highest 2,238.49 ft (2024-11-22), average 2,229.52 ft, 365 days measured2025: lowest 2,232.12 ft (2025-12-31), highest 2,237.92 ft (2025-01-01), average 2,235.25 ft, 365 days measured2026: lowest 2,225.56 ft (2026-10-14), highest 2,232.12 ft (2026-01-02), average 2,229.24 ft, 294 days measured
Lowest to highest that yearYear average2026 so far

One bar per year from the lowest to the highest daily level, with the year's average. Years with no bar have no daily record in the agency archive.

Lowest years

Years ranked by their lowest daily level.

  • 20132,200.92 ft on May 25
  • 20142,203.80 ft on May 22
  • 20112,205.24 ft on Dec 31
  • 20102,212.21 ft on Jan 26
  • 20092,212.39 ft on Dec 20

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (294 days)2,229.242,225.56Oct 142,232.12Jan 2
20252,235.252,232.12Dec 312,237.92Jan 1
20242,229.522,223.63Aug 292,238.49Nov 22
20232,227.082,225.05Oct 32,228.66Jan 1
20222,232.712,228.68Dec 302,236.96Jan 1
20212,230.462,219.41May 152,240.76Jul 14
20202,226.532,221.94Dec 302,229.49Mar 19
20192,232.592,229.26Dec 312,235.42Jan 1
20182,237.202,234.69Sep 52,240.54Jan 1
20172,243.922,240.56Dec 312,246.64Jan 19
20162,247.612,245.63Nov 12,249.43Jan 1
20152,246.382,238.51Apr 112,251.94Jul 11
20142,214.832,203.80May 222,239.94Sep 27
20132,204.622,200.92May 252,207.35Aug 19
2012 (290 days)2,203.412,200.62Sep 262,205.27Jan 10
20112,209.372,205.24Dec 312,213.53Jan 1
20102,214.592,212.21Jan 262,216.76Apr 23
20092,214.472,212.39Dec 202,216.72Jan 1
2008 (121 days)2,217.772,215.51Sep 82,219.01Sep 20
2007 (269 days)2,222.632,220.47Apr 282,224.59Aug 22
20062,226.922,222.64Dec 282,231.60Jan 2
20052,231.762,228.54Aug 122,234.44Aug 19
20042,220.322,216.78Feb 222,232.48Dec 7
20032,217.362,215.53May 192,219.48Jun 10
20022,217.072,216.16Mar 192,218.33Jul 13
20012,217.262,214.40Sep 202,220.17Jan 1
2000 (93 days)2,198.06131.05Sep 302,221.49Nov 1

Levels in feet. Partial years show the number of days with data.

Monthly averages

MonthAverageLowestHighest
January2,225.652,203.282,249.43
February2,225.292,202.932,249.20
March2,224.842,202.162,248.89
April2,225.052,201.422,248.56
May2,224.852,200.922,250.54
June2,225.122,201.082,250.60
July2,225.902,201.192,251.94
August2,225.262,200.842,251.41
September2,222.72131.052,250.64
October2,225.862,202.972,249.96
November2,225.922,203.432,249.85
December2,225.982,203.302,249.62

Download

Daily levels as CSV (8,976 rows; credit the original agencies listed below)