Conchas Lake — storage

Storage now, against this reservoir's own record

164.83 Mm³

Stored, May 2017

33rd

Percentile among 52 Mays on record

-24.8%

Against the May 1991–2020 average

-28.6%

Change over the 12 months to 2017-05

Storage in May 2017 was around the middle of the May record, ranked against 52 other Mays held for this reservoir.

Storage, 1965–2017

Monthly mean storage

620 monthly values, 1965 to 2017

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	Conchas Lake At Conchas Dam N. Mex. (Mm³)
October 1965	430
November 1965	430
December 1965	426
January 1966	426
February 1966	427
March 1966	427
April 1966	413
May 1966	381
June 1966	364
July 1966	345
August 1966	368
September 1966	379
October 1966	361
November 1966	355
December 1966	345
January 1967	344
February 1967	344
March 1967	341
April 1967	320
May 1967	290
June 1967	288
July 1967	308
August 1967	343
September 1967	349
October 1967	341
November 1967	335
December 1967	330
January 1968	331
February 1968	334
March 1968	335
April 1968	326
May 1968	301
June 1968	276
July 1968	279
August 1968	287
September 1968	287
October 1968	269
November 1968	265
December 1968	260
January 1969	259
February 1969	259
March 1969	261
April 1969	254
May 1969	243
June 1969	276
July 1969	298
August 1969	297
September 1969	336
October 1969	355
November 1969	377
December 1969	383
January 1970	388
February 1970	392
March 1970	394
April 1970	393
May 1970	385
June 1970	363
July 1970	340
August 1970	331
September 1970	315
October 1970	306
November 1970	304
December 1970	298
January 1971	296
February 1971	298
March 1971	297
April 1971	281
May 1971	231
June 1971	215
July 1971	201
August 1971	208
September 1971	200
October 1971	187
November 1971	187
December 1971	190
January 1972	193
February 1972	193
March 1972	192
April 1972	183
May 1972	160
June 1972	145
July 1972	165
August 1972	203
September 1972	248
October 1972	258
November 1972	262
December 1972	266
January 1973	269
February 1973	272
March 1973	274
April 1973	308
May 1973	369
June 1973	385
July 1973	369
August 1973	359
September 1973	336
October 1973	320
November 1973	314
December 1973	313
January 1974	315
February 1974	314
March 1974	309
April 1974	292
May 1974	259
June 1974	231
July 1974	204
August 1974	184
September 1974	170
October 1974	162
November 1974	161
December 1974	160
January 1975	160
February 1975	162
March 1975	164
April 1975	163
May 1975	149
June 1975	138
July 1975	131
August 1975	127
September 1975	115
October 1975	105
November 1975	101
December 1975	101
January 1976	102
February 1976	103
March 1976	102
April 1976	101
May 1976	99.5
June 1976	99.6
July 1976	106
August 1976	111
September 1976	100
October 1976	104
November 1976	103
December 1976	102
January 1977	103
February 1977	103
March 1977	103
April 1977	102
May 1977	109
June 1977	108
July 1977	103
August 1977	116
September 1977	152
October 1977	138
November 1977	135
December 1977	134
January 1978	133
February 1978	133
March 1978	132
April 1978	126
May 1978	116
June 1978	117
July 1978	138
August 1978	123
September 1978	108
October 1978	101
November 1978	110
December 1978	112
January 1979	112
February 1979	113
March 1979	114
April 1979	113
May 1979	119
June 1979	195
July 1979	213
August 1979	219
September 1979	212
October 1979	194
November 1979	186
December 1979	185
January 1980	187
February 1980	189
March 1980	189
April 1980	183
May 1980	199
June 1980	222
July 1980	198
August 1980	173
September 1980	166
October 1980	150
November 1980	142
December 1980	142
January 1981	142
February 1981	141
March 1981	141
April 1981	132
May 1981	115
June 1981	102
July 1981	102
August 1981	152
September 1981	192
October 1981	189
November 1981	186
December 1981	185
January 1982	186
February 1982	186
March 1982	187
April 1982	176
May 1982	161
June 1982	167
July 1982	232
August 1982	284
September 1982	300
October 1982	295
November 1982	292
December 1982	294
January 1983	298
February 1983	303
March 1983	306
April 1983	317
May 1983	334
June 1983	352
July 1983	350
August 1983	333
September 1983	309
October 1983	284
November 1983	277
December 1983	275
January 1984	276
February 1984	278
March 1984	276
April 1984	269
May 1984	259
June 1984	258
July 1984	253
August 1984	245
September 1984	250
October 1984	244
November 1984	246
December 1984	250
January 1985	256
February 1985	260
March 1985	266
April 1985	285
May 1985	318
June 1985	365
July 1985	361
August 1985	349
September 1985	337
October 1985	340
November 1985	348
December 1985	348
January 1986	350
February 1986	352
March 1986	352
April 1986	339
May 1986	320
June 1986	340
July 1986	365
August 1986	353
September 1986	359
October 1986	352
November 1986	374
December 1986	387
January 1987	395
February 1987	406
March 1987	410
April 1987	408
May 1987	407
June 1987	407
July 1987	397
August 1987	383
September 1987	392
October 1987	380
November 1987	370
December 1987	371
January 1988	356
February 1988	359
March 1988	360
April 1988	353
May 1988	338
June 1988	333
July 1988	338
August 1988	329
September 1988	337
October 1988	337
November 1988	327
December 1988	326
January 1989	327
February 1989	329
March 1989	329
April 1989	315
May 1989	293
June 1989	283
July 1989	272
August 1989	271
September 1989	279
October 1989	268
November 1989	259
December 1989	258
January 1990	259
February 1990	261
March 1990	266
April 1990	265
May 1990	251
June 1990	228
July 1990	209
August 1990	229
September 1990	235
October 1990	233
November 1990	230
December 1990	231
January 1991	235
February 1991	238
March 1991	238
April 1991	230
May 1991	212
June 1991	212
July 1991	205
August 1991	249
September 1991	318
October 1991	337
November 1991	338
December 1991	349
January 1992	359
February 1992	369
March 1992	376
April 1992	378
May 1992	367
June 1992	372
July 1992	365
August 1992	360
September 1992	356
October 1992	333
November 1992	321
December 1992	322
January 1993	326
February 1993	330
March 1993	332
April 1993	341
May 1993	337
June 1993	331
July 1993	327
August 1993	331
September 1993	327
October 1993	308
November 1993	303
December 1993	304
January 1994	307
February 1994	309
March 1994	312
April 1994	316
May 1994	362
June 1994	387
July 1994	364
August 1994	351
September 1994	345
October 1994	332
November 1994	332
December 1994	337
January 1995	343
February 1995	347
March 1995	350
April 1995	344
May 1995	341
June 1995	388
July 1995	390
August 1995	383
September 1995	384
October 1995	378
November 1995	369
December 1995	371
January 1996	374
February 1996	377
March 1996	374
April 1996	359
May 1996	331
June 1996	309
July 1996	331
August 1996	341
September 1996	360
October 1996	348
November 1996	343
December 1996	344
January 1997	346
February 1997	349
March 1997	352
April 1997	352
May 1997	381
June 1997	392
July 1997	372
August 1997	371
September 1997	365
October 1997	355
November 1997	350
December 1997	355
January 1998	360
February 1998	365
March 1998	372
April 1998	381
May 1998	368
June 1998	341
July 1998	311
August 1998	309
September 1998	300
October 1998	285
November 1998	292
December 1998	296
January 1999	299
February 1999	302
March 1999	301
April 1999	296
May 1999	389
June 1999	390
July 1999	380
August 1999	383
September 1999	372
October 1999	360
November 1999	353
December 1999	354
January 2000	357
February 2000	359
March 2000	361
April 2000	362
May 2000	340
June 2000	320
July 2000	306
August 2000	279
September 2000	248
October 2000	227
November 2000	232
December 2000	232
January 2001	234
February 2001	239
March 2001	250
April 2001	254
May 2001	241
June 2001	223
July 2001	197
August 2001	172
September 2001	154
October 2001	134
November 2001	130
December 2001	128
January 2002	128
February 2002	128
March 2002	127
April 2002	125
May 2002	111
June 2002	101
July 2002	102
August 2002	100.0
September 2002	108
October 2002	111
November 2002	110
December 2002	109
January 2003	108
February 2003	107
March 2003	106
April 2003	103
May 2003	100
June 2003	98.3
July 2003	96.6
August 2003	93.0
September 2003	90.3
October 2003	97.3
November 2003	97.5
December 2003	95.7
January 2004	94.2
February 2004	93.2
March 2004	92.5
April 2004	95.6
May 2004	103
June 2004	104
July 2004	114
August 2004	140
September 2004	147
October 2004	153
November 2004	153
December 2004	154
January 2005	155
February 2005	158
March 2005	161
April 2005	180
May 2005	223
June 2005	237
July 2005	222
August 2005	212
September 2005	213
October 2005	203
November 2005	200
December 2005	199
January 2006	199
February 2006	198
March 2006	197
April 2006	190
May 2006	175
June 2006	160
July 2006	150
August 2006	164
September 2006	195
October 2006	185
November 2006	180
December 2006	179
January 2007	180
February 2007	181
March 2007	182
April 2007	183
May 2007	183
June 2007	182
July 2007	171
August 2007	156
September 2007	148
October 2007	135
November 2007	126
December 2007	125
January 2008	125
February 2008	126
March 2008	126
April 2008	125
May 2008	121
June 2008	113
July 2008	107
August 2008	114
September 2008	112
October 2008	103
November 2008	102
December 2008	102
January 2009	103
February 2009	103
March 2009	102
April 2009	101
May 2009	105
June 2009	102
July 2009	99.7
August 2009	109
September 2009	109
October 2009	109
November 2009	107
December 2009	106
January 2010	106
February 2010	107
March 2010	108
April 2010	113
May 2010	122
June 2010	124
July 2010	119
August 2010	119
September 2010	111
October 2010	105
November 2010	103
December 2010	103
January 2011	103
February 2011	103
March 2011	103
April 2011	101
May 2011	97.1
June 2011	93.2
July 2011	89.3
August 2011	86.5
September 2011	93.4
October 2011	100
November 2011	97.7
December 2011	96.5
January 2012	95.7
February 2012	94.5
March 2012	92.6
April 2012	90.6
May 2012	88.9
June 2012	89.3
July 2012	86.4
August 2012	83.1
September 2012	80.6
October 2012	82.5
November 2012	80.3
December 2012	78.9
January 2013	78.0
February 2013	77.3
March 2013	76.2
April 2013	74.4
May 2013	72.4
June 2013	71.6
July 2013	87.5
August 2013	106
September 2013	157
October 2013	197
November 2013	194
December 2013	193
January 2014	192
February 2014	190
March 2014	188
April 2014	184
May 2014	174
June 2014	180
July 2014	180
August 2014	204
September 2014	194
October 2014	190
November 2014	182
December 2014	180
January 2015	180
February 2015	180
March 2015	180
April 2015	174
May 2015	175
June 2015	206
July 2015	212
August 2015	227
September 2015	223
October 2015	228
November 2015	243
December 2015	244
January 2016	246
February 2016	247
March 2016	246
April 2016	242
May 2016	231
June 2016	224
July 2016	206
August 2016	186
September 2016	181
October 2016	170
November 2016	165
December 2016	164
January 2017	164
February 2017	165
March 2017	164
April 2017	162
May 2017	165

The reservoir's year

Seasonal storage profile

Each calendar month's reference average, against the most recent year

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
Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	215	164
Feb	216	165
Mar	217	164
Apr	217	162
May	219	165
Jun	221	224
Jul	215	206
Aug	217	186
Sep	219	181
Oct	214	170
Nov	212	165
Dec	212	164

Rate and persistence

-5.50 Mm³

Mean drawdown per month over 12 months

0 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

Conchas Lake At Conchas Dam N. Mex.

Gauge location

Where this comes from

620 monthly observations 1965–2017 Mm³

Spatially aggregatedHigh confidenceMay 2017

Source: USGS — National Water Information System, 07223500. 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.

Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	215	164
Feb	216	165
Mar	217	164
Apr	217	162
May	219	165
Jun	221	224
Jul	215	206
Aug	217	186
Sep	219	181
Oct	214	170
Nov	212	165
Dec	212	164

Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	215	164
Feb	216	165
Mar	217	164
Apr	217	162
May	219	165
Jun	221	224
Jul	215	206
Aug	217	186
Sep	219	181
Oct	214	170
Nov	212	165
Dec	212	164

Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	215	164
Feb	216	165
Mar	217	164
Apr	217	162
May	219	165
Jun	221	224
Jul	215	206
Aug	217	186
Sep	219	181
Oct	214	170
Nov	212	165
Dec	212	164