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Biggest Weekly Rises and Drops on Record

Every reservoir's record book, and the weeks that just made it.

Western Reservoir Conditions·Daily·No. 96·

Each reservoir's biggest one-week rises and drops, Sunday to Sunday, ranked against its own daily gauge record, and where the latest completed week falls among them. Ranks are within each reservoir; feet are not comparable between lakes of different shapes.

This week's record-book entries

ReservoirWeekChangeRank in its recordRecord since
Navajo Reservoir to +21.92 ftlargest rise1962
Lake Powell
largest outside April to July; 13th-largest since first filling (1979)
 to +6.96 ft23rd-largest rise1963

Record weekly rise and drop, every reservoir

Colorado River system

ReservoirBiggest weekly riseBiggest weekly dropRecord since
Blue Mesa Reservoir+24.19 ft
to
-11.84 ft
to
1965
Flaming Gorge Reservoir+4.70 ft
to
-2.97 ft
to
1968
Lake Havasu+3.67 ft
to (first filling)
-6.39 ft
to
1938
Lake Mead+30.67 ft
to (first filling)
-2.67 ft
to
1935
Lake Mohave+28.20 ft
to (first filling)
-4.19 ft
to
1950
Lake Powell This week+21.70 ft
to (first filling)
-5.80 ft
to (first filling)
1963
Navajo Reservoir This week+21.92 ft
to
-8.18 ft
to (first filling)
1962

California

ReservoirBiggest weekly riseBiggest weekly dropRecord since
Don Pedro Reservoir+19.71 ft
to
-5.75 ft
to
1985
Folsom Lake+44.21 ft
to
-35.01 ft
to
1985
Lake Berryessa+9.20 ft
to
-1.99 ft
to
1985
Lake Oroville+71.23 ft
to
-49.62 ft
to
1985
New Melones Lake+32.93 ft
to
-6.86 ft
to
1985
San Luis Reservoir+18.46 ft
to
-16.36 ft
to
1988
Shasta Lake+53.91 ft
to
-19.49 ft
to
1985
Trinity Lake+22.86 ft
to
-8.40 ft
to
1980

Texas and the Rio Grande

ReservoirBiggest weekly riseBiggest weekly dropRecord since
Amistad Reservoir+32.36 ft
to (first filling)
-4.53 ft
to
1968
Aquilla Lake+15.87 ft
to
-7.22 ft
to
1988
B. A. Steinhagen Lake+18.52 ft
to
-14.98 ft
to
1987
Bardwell Lake+11.16 ft
to
-6.60 ft
to
1988
Belton Lake+18.15 ft
to
-5.03 ft
to
1988
Benbrook Lake+13.08 ft
to
-7.46 ft
to
1988
Bois d'Arc Lake+3.54 ft
to (first filling)
-0.85 ft
to
2021
Brady Creek Reservoir+11.35 ft
to
-0.62 ft
to
1999
Bridgeport Reservoir+11.84 ft
to
-2.98 ft
to
1996
Caddo Lake+7.67 ft
to
-4.86 ft
to
2012
Canyon Lake+40.23 ft
to
-6.46 ft
to
1988
Cedar Creek Reservoir+2.73 ft
to
-1.03 ft
to
1996
Champion Creek Reservoir+8.30 ft
to
-1.44 ft
to
1997
Choke Canyon Reservoir+14.60 ft
to
-0.77 ft
to
1999
Coleto Creek Reservoir+3.32 ft
to
-1.98 ft
to
1998
Comanche Creek Reservoir+2.29 ft
to
-1.42 ft
to
1994
Cooper (Chapman) Lake+9.02 ft
to
-2.04 ft
to
2000
E. V. Spence Reservoir+20.96 ft
to
-1.39 ft
to
1997
Eagle Mountain Reservoir+5.07 ft
to
-5.04 ft
to
1988
Elephant Butte Reservoir+14.23 ft
to (first filling)
-8.14 ft
to
1915
Falcon Lake+62.45 ft
to (first filling)
-5.75 ft
to
1953
Fort Phantom Hill Reservoir+7.32 ft
to
-1.45 ft
to
1999
Gibbons Creek Reservoir+2.66 ft
to
-1.78 ft
to
2017
Granger Lake+11.45 ft
to
-7.40 ft
to
1995
Grapevine Lake+11.48 ft
to
-3.26 ft
to
1989
Greenbelt Lake+4.13 ft
to
-0.42 ft
to
1996
Halbert Lake+4.01 ft
to
-0.98 ft
to
1999
Hords Creek Lake+9.69 ft
to
-0.32 ft
to
2000
Houston County Lake+3.15 ft
to
-2.42 ft
to
1999
Hubbard Creek Reservoir+8.21 ft
to
-2.00 ft
to
1997
Inks Lake+9.72 ft
to
-10.20 ft
to
1966
Joe Pool Lake+10.85 ft
to (first filling)
-5.86 ft
to
1988
Lake Abilene+10.33 ft
to
-3.80 ft
to
1999
Lake Alan Henry+15.45 ft
to (first filling)
-3.15 ft
to
1997
Lake Amon G Carter+7.90 ft
to
-3.29 ft
to
1999
Lake Arlington+9.97 ft
to
-9.55 ft
to
1988
Lake Arrowhead+8.19 ft
to
-0.83 ft
to
1996
Lake Athens+4.02 ft
to
-1.27 ft
to
1999
Lake Austin+12.90 ft
to
-12.50 ft
to
1966
Lake Bob Sandlin+3.06 ft
to
-2.00 ft
to
1987
Lake Bonham+8.02 ft
to
-5.71 ft
to
1999
Lake Brownwood+9.55 ft
to
-4.31 ft
to
1999
Lake Buchanan+16.56 ft
to
-6.49 ft
to
1937
Lake Cherokee+2.83 ft
to
-0.58 ft
to
2017
Lake Cisco+13.22 ft
to
-0.40 ft
to
1999
Lake Coleman+19.29 ft
to
-3.09 ft
to
1999
Lake Colorado City+12.75 ft
to
-0.38 ft
to
1996
Lake Conroe+3.16 ft
to
-2.43 ft
to
1996
Lake Corpus Christi+10.19 ft
to
-1.08 ft
to
1998
Lake Crook+2.54 ft
to
-1.50 ft
to
1999
Lake Cypress Springs+3.33 ft
to
-1.81 ft
to
1998
Lake Fork Reservoir+2.75 ft
to
-1.76 ft
to
1988
Lake Georgetown+24.45 ft
to
-8.18 ft
to
1995
Lake Graham+9.30 ft
to
-2.36 ft
to
1996
Lake Granbury+6.13 ft
to
-2.10 ft
to
1987
Lake Houston+4.97 ft
to
-5.89 ft
to
1996
Lake J.B. Thomas+12.57 ft
to
-0.79 ft
to
1999
Lake Jacksonville+1.54 ft
to
-1.25 ft
to
1999
Lake Kemp+1,099.99 ft
to
-1.74 ft
to
1993
Lake Kickapoo+8.76 ft
to
-0.80 ft
to
1999
Lake L. B. Johnson+8.70 ft
to
-13.89 ft
to
1951
Lake Limestone+6.37 ft
to
-1.28 ft
to
1995
Lake Marble Falls+21.20 ft
to
-21.70 ft
to
1966
Lake Meredith+6.35 ft
to
-0.62 ft
to
1995
Lake Mineral Wells+7.09 ft
to
-0.93 ft
to
1999
Lake Nacogdoches+7.32 ft
to
-6.31 ft
to
1996
Lake Nasworthy+3.29 ft
to
-1.04 ft
to
1996
Lake Nocona (Farmer's Creek)+10.93 ft
to
-1.81 ft
to
1999
Lake O the Pines+7.91 ft
to
-3.67 ft
to
1988
Lake Palestine+3.23 ft
to
-2.43 ft
to
1999
Lake Palo Pinto+9.14 ft
to
-1.76 ft
to
1999
Lake Pat Cleburne+9.29 ft
to
-2.83 ft
to
1998
Lake Ray Hubbard+3.07 ft
to
-1.39 ft
to
1996
Lake Stamford+8.55 ft
to
-2.99 ft
to
1999
Lake Striker+0.62 ft
to
-0.60 ft
to
2017
Lake Sulphur Springs+3.72 ft
to
-3.27 ft
to
1999
Lake Sweetwater+28.90 ft
to
-0.43 ft
to
1999
Lake Tawakoni+3.96 ft
to
-1.87 ft
to
1995
Lake Texana+5.13 ft
to
-2.84 ft
to
1999
Lake Texoma+11.04 ft
to
-4.87 ft
to
1994
Lake Travis+56.84 ft
to
-12.08 ft
to
1940
Lake Tyler+2.32 ft
to
-1.40 ft
to
1999
Lake Waxahachie+4.40 ft
to
-1.43 ft
to
1999
Lake Weatherford+4.76 ft
to
-0.84 ft
to
1998
Lake Worth+4.27 ft
to
-2.47 ft
to
1990
Lavon Lake+9.26 ft
to
-3.68 ft
to
1988
Leon Reservoir+7.85 ft
to
-5.90 ft
to
1999
Lewisville Lake+6.07 ft
to
-2.09 ft
to
1988
Livingston Reservoir+2.26 ft
to
-1.85 ft
to
1996
Lost Creek Reservoir+6.67 ft
to
-3.87 ft
to
1999
Mackenzie Reservoir+8.78 ft
to
-0.74 ft
to
1999
Martin Lake+4.29 ft
to
-1.24 ft
to
1995
Medina Lake+27.30 ft
to
-1.83 ft
to
1997
Millers Creek Reservoir+19.32 ft
to
-3.32 ft
to
1998
Monticello Reservoir+2.53 ft
to
-1.64 ft
to
1998
Moss Lake+5.82 ft
to
-3.81 ft
to
2000
Mountain Creek Lake+1.49 ft
to
-1.36 ft
to
1987
Murvaul Lake+2.32 ft
to
-2.48 ft
to
1999
Navarro Mills Lake+16.87 ft
to
-4.49 ft
to
1988
New Terrell City Lake+4.11 ft
to
-2.76 ft
to
1999
North Fork Buffalo Creek Reservoir+6.92 ft
to
-0.76 ft
to
1998
O. C. Fisher Lake+23.00 ft
to
-5.17 ft
to
2000
O. H. Ivie Reservoir+15.38 ft
to
-0.87 ft
to
1997
Oak Creek Reservoir+14.62 ft
to
-0.54 ft
to
1999
Palo Duro Reservoir+26.49 ft
to
-1.54 ft
to
1999
Pat Mayse Lake+402.80 ft
to
-400.53 ft
to
1987
Possum Kingdom Lake+12.40 ft
to
-5.55 ft
to
1947
Proctor Lake+21.79 ft
to
-10.15 ft
to
2001
Ray Roberts Lake+8.40 ft
to (first filling)
-2.38 ft
to
1988
Red Bluff Reservoir+8.05 ft
to
-1.97 ft
to
1999
Richland-Chambers Reservoir+5.02 ft
to
-1.35 ft
to
1989
Sam Rayburn Reservoir+99.47 ft
to (first filling)
-1.80 ft
to
1988
Somerville Lake+14.60 ft
to
-2.10 ft
to
1995
Stillhouse Hollow Lake+19.75 ft
to
-5.90 ft
to
1988
Toledo Bend Reservoir+3.10 ft
to
-1.53 ft
to
1986
Twin Buttes Reservoir+17.94 ft
to
-1.27 ft
to
2000
Waco Lake+21.66 ft
to
-9.22 ft
to
1995
White River Reservoir+10.19 ft
to
-0.40 ft
to
1999
Whitney Lake+20.50 ft
to
-8.06 ft
to
1999
Wright Patman Lake+16.18 ft
to
-3.35 ft
to
1987

How the weeks are ranked

A week runs from one Sunday's daily elevation reading to the next Sunday's, the same convention as the published Lake Powell weekly-increase tables. Weeks with either Sunday missing are left out rather than estimated, tied weeks share a rank, and a Sunday reading that is a one-day gauge spike (at least a foot away from both neighbouring days, which agree with each other) is treated as missing. Readings come from the Bureau of Reclamation (RISE), California DWR (CDEC) and the Texas Water Development Board; recent values are provisional and can be revised, so a rank can move after the fact.

Each record starts on that gauge's first daily reading, and every rank names that year: several California and Texas series begin in the 1980s or 1990s, long after the dam was built. For Lake Mead, Lake Powell and other reservoirs whose record begins empty, weeks during first filling are ranked with the rest and tagged, and the rank since first filling is shown beside it. "Outside the usual runoff months" is only said where the record has a clear season: four consecutive months holding at least 60% of all rising-week gains, with the week itself in a month holding 5% or less.

Updated . Full daily series: data downloads.