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MIDDLE FORK COSUMNES RIVER - SOMERSET (SOSC1)
Latitude:
38.62º N
Longitude:
120.70º W
Elevation:
1821 Feet
Location: El Dorado County in CA
River Group: San Joaquin
Issuance Time: Apr 30 2025 at 8:46 AM PDT

2025 Seasonal Trend Tabular (Apr-Jul)Plot View  |  Select a Different Water Year:  

# Tabular Seasonal Trend Plot for SOSC1
#
# File Generation Time:  04/30/2025  08:46 AM PDT
# Interval:  1 Day
#
# Latest Forecast April-July Percent of Average:  MM %  ( MM kaf )
# 30 Year April-July Volume Mean: MM kaf
#
# Peak April-July Volume and Date:     1.21 kaf  on  04/01/2025
# Peak Water Year Volume and Date:     2.35 kaf  on  02/15/2025
#
#               Min       90%       75%       50%       25%       10%       Max
#               Exceed    Exceed    Exceed    Exceed    Exceed    Exceed    Exceed    Raw Obs  Raw Avg
#               Apr-Jul   Apr-Jul   Apr-Jul   Apr-Jul   Apr-Jul   Apr-Jul   Apr-Jul   Apr-Jul  Apr-Jul  Raw Daily
# Date          Forecast  Forecast  Forecast  Forecast  Forecast  Forecast  Forecast  To Date  To Date  Observation
# (mm/dd/YYYY)  (kaf)     (kaf)     (kaf)     (kaf)     (kaf)     (kaf)     (kaf)     (kaf)    (kaf)    (kaf)
# -----------------------------------------------------------------------------------------------------------------
  10/01/2024       11.8      17.6      24.0      41.5      79.2     105       133                          0.044395
  10/02/2024       11.4      17.8      26.0      37.8      75.5     105       133                          0.043905
  10/03/2024       11.4      17.9      26.0      37.1      75.4     105       133                          0.043577
  10/04/2024       11.4      17.7      26.0      36.7      75.4     105       132                          0.044613
  10/05/2024       11.4      17.8      25.7      36.7      75.5     105       132                          0.055240
  10/06/2024       11.5      17.5      24.8      36.7      75.5     105       132                          0.058029
  10/07/2024       11.4      17.7      24.9      36.3      75.6     105       133                          0.056770
  10/08/2024       11.4      17.9      26.0      36.5      75.8     105       132                          0.056669
  10/09/2024       11.5      17.9      26.1      36.5      75.7     105       132                          0.056268
  10/10/2024       11.5      17.8      24.6      36.8      75.5     105       132                          0.056442
  10/11/2024       12.0      17.9      26.0      37.5      75.5     105       132                          0.056792
  10/12/2024       11.6      18.3      26.0      38.7      75.6     105       133                          0.057478
  10/13/2024       11.4      17.7      25.6      37.0      75.5     105       132                          0.058361
  10/14/2024       11.8      18.1      26.1      37.6      75.6     105       133                          0.059410
  10/15/2024       11.7      17.8      25.5      36.3      75.5     105       132                          0.060364
  10/16/2024       11.6      18.2      26.0      37.5      75.6     105       133                          0.061005
  10/17/2024       11.7      17.9      24.5      39.9      78.3     105       133                          0.064942
  10/18/2024       11.5      17.8      24.3      39.6      78.3     105       133                          0.071376
  10/19/2024       11.5      17.8      23.9      39.4      78.4     105       133                          0.070008
  10/20/2024       11.7      17.9      24.1      39.3      78.4     105       133                          0.066130
  10/21/2024       11.6      17.9      24.2      39.6      80.0     106       133                          0.063478
  10/22/2024       11.7      17.8      23.7      39.6      78.3     105       133                          0.061859
  10/23/2024       11.7      17.6      23.9      39.6      78.4     104       133                          0.061112
  10/24/2024       11.8      17.8      24.0      39.3      78.5     104       133                          0.061005
  10/25/2024       11.7      17.7      23.9      39.1      78.3     104       133                          0.060897
  10/26/2024       11.8      17.9      24.1      40.2      78.3     105       133                          0.060951
  10/27/2024       11.5      17.6      23.7      39.2      78.4     104       133                          0.060310
  10/28/2024       11.8      17.7      23.7      39.3      78.3     104       133                          0.060523
  10/29/2024       11.9      18.1      24.5      40.7      78.5     105       133                          0.061965
  10/30/2024       11.7      17.7      23.9      40.0      78.6     104       133                          0.063085
  10/31/2024       11.6      17.9      23.6      39.3      78.5     104       132                          0.064234
  11/01/2024       11.7      17.8      23.9      39.5      78.4     104       132                          0.066128
  11/02/2024       11.5      17.4      23.8      39.4      78.3     104       132                          0.067495
  11/03/2024       11.7      18.0      23.9      39.8      78.3     105       132                          0.074189
  11/04/2024       11.4      16.2      23.6      38.2      78.2     104       131                          0.073933
  11/05/2024       11.6      17.9      24.3      41.1      78.5     109       131                          0.070478
  11/06/2024       11.1      18.5      24.1      40.4      78.5     105       132                          0.068641
  11/07/2024       10.6      18.0      23.6      39.5      78.6     104       132                          0.067943
  11/08/2024       10.8      17.3      23.4      38.7      78.5     104       132                          0.067143
  11/09/2024       11.2      16.9      23.3      38.7      78.2     104       132                          0.066745
  11/10/2024       11.9      17.3      23.9      41.5      78.3     106       132                          0.066915
  11/11/2024       11.6      17.4      23.9      40.6      83.7     107       132                          0.067429
  11/12/2024       11.6      18.2      24.1      39.4      82.7     107       132                          0.075555
  11/13/2024       12.1      18.5      24.3      39.9      81.4     105       132                          0.083363
  11/14/2024       10.9      16.9      23.6      37.2      78.8     104       132                          0.076053
  11/15/2024       11.0      17.0      22.9      38.8      79.2     104       132                          0.075075
  11/16/2024       11.8      17.7      24.8      41.1      79.8     108       133                          0.081970
  11/17/2024       12.5      18.9      25.1      42.3      79.3     104       133                          0.082103
  11/18/2024       13.1      19.1      27.6      44.6      83.1     112       137                          0.077438
  11/19/2024       12.7      18.5      27.2      43.1      82.5     110       137                          0.082914
  11/20/2024       13.7      20.2      28.1      42.9      84.8     106       135                          0.081829
  11/21/2024       13.2      20.9      28.4      45.0      89.1     111       141                          0.079271
  11/22/2024       11.8      17.9      25.0      40.2      80.5     106       136                          0.083537
  11/23/2024       11.7      16.2      24.7      39.2      81.5     106       136                          0.083922
  11/24/2024       11.7      17.2      25.0      37.4      78.7     104       133                          0.165164
  11/25/2024       10.6      15.5      23.4      36.5      78.3     103       132                          0.124409
  11/26/2024       11.0      14.5      23.1      34.1      79.8     103       132                          0.106474
  11/27/2024        9.39     14.2      22.6      33.6      77.5     101       131                          0.138424
  11/28/2024        9.57     14.6      22.9      33.0      79.0     101       132                          0.123661
  11/29/2024        8.63     14.4      22.1      32.5      76.4     101       131                          0.105084
  11/30/2024       10.0      14.9      22.8      35.4      77.0     101       133                          0.097489
  12/01/2024       10.4      14.0      22.4      34.9      75.2     101       132                          0.093482
  12/02/2024       10.7      14.1      22.7      35.0      74.5     100       131                          0.091435
  12/03/2024        9.61     14.6      21.6      33.8      74.2      98.9     130                          0.090110
  12/04/2024       10.2      14.4      20.5      34.8      74.2     101       131                          0.089277
  12/05/2024        9.92     15.4      21.1      34.2      74.5     100       131                          0.088776
  12/06/2024       10.7      14.1      22.2      33.5      73.8     100       128                          0.087770
  12/07/2024        9.16     13.9      21.5      34.2      72.5     100       127                          0.087409
  12/08/2024        7.82     13.3      19.9      33.4      72.9      95.6     128                          0.086381
  12/09/2024        9.90     15.4      22.0      34.9      73.3      98.1     128                          0.086322
  12/10/2024       11.0      16.4      20.9      36.1      74.6     100       128                          0.084933
  12/11/2024       11.9      18.3      21.8      35.5      74.5     104       129                          0.084174
  12/12/2024       10.7      17.1      21.8      33.9      74.9     106       126                          0.084888
  12/13/2024        9.81     17.8      23.6      34.5      75.1     101       126                          0.102765
  12/14/2024       11.0      19.9      23.0      37.4      75.4     103       130                          0.111977
  12/15/2024       11.1      19.3      22.2      38.2      75.0     102       131                          0.154187
  12/16/2024       11.4      19.2      23.9      38.3      73.5     100       130                          0.148421
  12/17/2024       11.8      17.8      23.0      39.1      76.4     102       131                          0.122771
  12/18/2024       12.3      18.5      24.6      39.3      78.3     103       137                          0.128981
  12/19/2024       12.3      17.7      24.4      39.4      71.3     100       132                          0.117278
  12/20/2024       12.6      18.4      24.8      40.3      71.4      99.2     137                          0.110890
  12/21/2024       11.6      16.0      23.7      39.4      68.6      97.7     129                          0.107690
  12/22/2024       11.9      17.3      24.9      41.7      75.1      97.1     129                          0.107900
  12/23/2024       11.9      17.5      25.2      41.6      76.1      96.6     129                          0.152198
  12/24/2024       12.3      18.5      24.1      42.8      72.4      97.9     125                          0.161278
  12/25/2024       11.4      17.3      22.7      38.2      70.2      95.1     134                          0.204384
  12/26/2024       11.9      16.3      23.4      37.6      69.7      93.7     128                          0.183414
  12/27/2024       10.4      15.9      23.3      35.0      66.3      91.8     123                          0.150175
  12/28/2024       10.7      15.5      23.0      34.4      65.1      91.2     122                          0.252851
  12/29/2024       11.1      15.0      23.6      34.3      60.0      90.8     121                          0.232647
  12/30/2024       10.1      14.9      22.9      33.0      61.4      90.4     119                          0.418675
  12/31/2024       10.6      14.8      23.4      32.9      60.7      90.4     120                          0.386332
  01/01/2025       10.1      13.8      21.2      32.7      59.6      90.8     116                          0.259735
  01/02/2025       10.6      15.1      22.9      35.0      61.5      93.6     119                          0.213920
  01/03/2025       10.4      15.5      24.0      36.8      62.5      93.8     119                          0.189275
  01/04/2025       10.3      14.0      24.0      32.9      58.3      93.7     116                          0.201906
  01/05/2025       10.8      14.9      24.2      34.8      61.7      92.4     116                          0.191348
  01/06/2025       10.3      14.3      22.9      36.4      59.9      92.3     117                          0.171162
  01/07/2025       10.7      14.7      24.2      39.1      60.8      94.0     119                          0.163879
  01/08/2025        9.96     13.3      21.4      33.6      55.8      93.2     113                          0.155806
  01/09/2025       10.1      13.7      22.6      34.8      55.6      91.2     111                          0.147350
  01/10/2025        9.84     13.9      24.3      33.7      55.2      89.3     113                          0.141505
  01/11/2025       10.7      14.4      25.0      35.3      57.7      92.6     114                          0.136360
  01/12/2025       10.1      12.7      23.3      32.8      52.1      89.7     114                          0.132619
  01/13/2025        8.98     12.2      21.8      31.3      50.3      86.1     110                          0.128906
  01/14/2025       10.3      12.7      22.3      31.8      51.7      87.3     111                          0.125157
  01/15/2025       10.9      13.4      23.6      34.1      52.6      90.5     110                          0.121531
  01/16/2025       10.6      13.2      23.8      32.9      53.6      89.6     110                          0.118915
  01/17/2025        9.54     13.7      24.1      33.1      55.3      90.0     111                          0.116584
  01/18/2025       10.8      13.7      23.9      33.1      56.4      90.0     111                          0.113847
  01/19/2025        8.60     11.4      19.5      29.7      49.6      81.3     104                          0.111814
  01/20/2025        9.43     11.5      19.6      29.9      50.8      81.0     105                          0.109814
  01/21/2025        8.16     10.9      18.8      28.4      48.3      80.1     102                          0.107744
  01/22/2025        8.45     11.8      19.4      28.2      49.1      79.8     104                          0.103219
  01/23/2025        8.50     11.0      17.9      29.4      50.0      77.7     107                          0.105056
  01/24/2025       10.6      12.2      19.7      31.2      51.3      85.0     112                          0.103743
  01/25/2025       10.6      13.3      20.5      31.1      52.4      82.1     113                          0.101547
  01/26/2025        9.01     11.2      18.1      29.3      50.6      80.5     108                          0.102398
  01/27/2025       10.2      12.1      20.2      30.9      54.5      82.9     113                          0.099883
  01/28/2025       10.2      12.3      20.6      30.3      55.8      82.8     114                          0.097556
  01/29/2025       11.7      14.0      21.6      32.2      60.6      82.9     118                          0.095902
  01/30/2025       14.0      16.1      23.6      39.1      67.5      85.5     123                          0.095331
  01/31/2025       15.2      16.0      26.4      38.4      67.0      90.0     124                          0.095918
  02/01/2025       15.4      16.2      27.2      40.6      66.2      90.3     125                          0.103122
  02/02/2025       13.7      16.9      25.0      37.1      64.8      91.2     119                          0.336336
  02/03/2025       14.2      15.9      25.1      34.6      61.9      89.2     121                          0.562640
  02/04/2025       13.6      16.1      25.6      37.9      64.0      89.9     122                          0.428710
  02/05/2025       11.8      16.3      23.3      34.6      62.2      83.2     114                          0.580582
  02/06/2025       13.2      16.1      26.2      37.9      65.1      88.2     116                          1.051459
  02/07/2025       12.9      15.1      23.7      33.3      62.8      83.5     125                          0.855892
  02/08/2025       13.2      15.1      21.8      33.9      61.9      80.3     119                          1.461836
  02/09/2025       11.5      15.3      20.9      32.0      59.1      84.5     117                          0.876283
  02/10/2025       10.9      15.6      21.6      31.6      58.2      77.2     112                          0.648718
  02/11/2025       14.8      15.9      21.2      29.8      54.0      76.4     114                          0.519633
  02/12/2025       10.7      16.9      22.4      29.5      59.3      74.6     117                          0.436039
  02/13/2025       10.4      15.7      20.5      28.7      56.6      71.8     114                          0.375377
  02/14/2025       11.6      16.4      21.3      28.5      56.7      71.3     123                          1.845978
  02/15/2025       11.1      15.6      19.4      26.4      51.4      68.0     112                          2.346812
  02/16/2025       11.3      15.7      19.2      26.8      52.8      68.1     114                          1.344978
  02/17/2025       11.1      15.7      20.0      26.6      52.9      66.7     113                          0.983320
  02/18/2025       11.1      15.8      19.0      26.5      51.4      66.2     107                          0.764556
  02/19/2025       10.5      14.1      18.3      24.5      47.0      63.6     103                          0.624886
  02/20/2025       10.9      15.3      18.9      25.6      47.7      66.1     106                          0.540091
  02/21/2025       11.8      16.5      21.7      30.1      58.1      71.5     116                          0.474552
  02/22/2025       12.0      16.7      21.5      30.4      55.6      72.3     115                          0.421825
  02/23/2025       11.9      16.7      20.5      29.4      54.6      66.2     111                          0.380171
  02/24/2025       11.8      17.6      21.9      31.3      58.4      69.2     116                          0.355459
  02/25/2025       11.9      18.9      25.0      35.1      63.8      74.5     124                          0.341493
  02/26/2025       12.3      19.0      24.9      34.5      62.0      73.9     119                          0.328269
  02/27/2025       11.4      19.0      22.6      33.3      57.2      66.8     115                          0.305542
  02/28/2025       12.1      18.2      24.2      30.2      55.5      70.8     115                          0.289178
  03/01/2025       10.6      14.8      18.6      25.8      52.1      69.9     110                          0.275294
  03/02/2025     Missing   Missing   Missing   Missing   Missing   Missing   Missing                       0.266285
  03/03/2025       16.1      24.1      30.3      37.4      61.6      86.5     126                          0.318848
  03/04/2025       16.3      24.0      32.0      40.9      67.7      93.7     128                          0.286616
  03/05/2025       15.9      24.1      30.7      37.9      59.6      84.3     128                          0.261905
  03/06/2025       18.2      25.6      32.9      43.9      66.3      89.0     135                          0.299177
  03/07/2025       16.6      24.2      29.9      43.4      70.3      86.8     111                          0.290252
  03/08/2025       16.6      21.7      28.1      36.0      56.4      81.4      96.4                        0.260003
  03/09/2025       17.9      25.3      30.3      40.6      63.7      84.4     103                          0.247194
  03/10/2025       19.3      25.6      30.9      39.8      62.5      84.2      90.7                        0.245623
  03/11/2025       19.3      26.4      30.3      44.0      66.3      83.5     110                          0.243227
  03/12/2025       18.3      26.1      33.1      44.2      65.4      83.2     119                          0.238681
  03/13/2025       22.9      27.2      32.5      41.5      67.0      81.6     113                          0.314549
  03/14/2025       21.1      27.3      33.4      39.8      64.5      78.2      90.8                        0.387030
  03/15/2025       21.3      27.5      33.4      38.3      62.7      80.9      92.8                        0.343806
  03/16/2025       19.6      24.6      30.8      36.0      57.0      73.0      82.7                        0.340501
  03/17/2025       20.8      24.7      28.3      33.8      50.0      67.7      79.9                        0.359426
  03/18/2025       21.8      25.4      31.7      38.9      61.3      73.8     112                          0.941998
  03/19/2025       21.3      26.1      32.4      38.4      58.0      72.8     104                          0.681168
  03/20/2025       20.9      25.0      29.6      34.7      52.5      66.0      77.8                        0.601248
  03/21/2025       22.6      26.2      30.7      36.0      50.7      68.7      80.4                        0.576123
  03/22/2025       23.4      27.8      31.1      37.8      53.3      73.5      88.3                        0.571000
  03/23/2025       23.4      28.7      35.0      42.7      62.0      84.2      93.7                        0.580009
  03/24/2025       23.5      29.9      35.0      42.6      55.7      81.6     103                          0.626290
  03/25/2025       26.7      31.4      39.5      46.4      58.9      87.9     104                          0.747119
  03/26/2025       29.5      35.6      41.1      48.9      64.4      88.5     100                          0.916956
  03/27/2025       27.5      33.4      39.7      46.1      59.6      82.2      93.5                        0.965137
  03/28/2025       27.0      33.1      39.6      46.9      58.2      77.0     100                          0.965800
  03/29/2025       27.5      30.1      36.9      43.8      53.4      69.3      84.9                        0.871004
  03/30/2025       27.1      32.3      37.0      41.8      54.0      65.5      82.0                        0.748855
  03/31/2025       32.5      34.0      37.2      45.2      54.2      65.9      81.8                        0.741829
  04/01/2025       33.9      35.8      39.4      42.3      50.8      66.8      84.7                        1.205803
  04/02/2025       34.6      35.9      37.4      41.4      50.9      62.6      74.0      1.14              1.142248
  04/03/2025       34.8      36.5      38.1      42.0      52.4      65.7      77.3      2.20              1.057289
  04/04/2025       34.9      36.1      39.3      41.9      53.4      65.9      87.9      3.13              0.926459
  04/05/2025       34.4      35.8      37.5      41.3      51.4      63.1      70.0      3.97              0.846127
  04/06/2025       33.7      35.9      38.1      40.6      49.3      62.1      68.3      4.77              0.801582
  04/07/2025       33.7      35.9      37.6      40.8      48.8      60.6      65.8      5.58              0.809681
  04/08/2025       33.9      36.0      37.2      39.6      47.0      57.1      64.4      6.45              0.864558
  04/09/2025       34.2      36.0      37.8      39.3      46.5      56.8      62.1      7.35              0.899601
  04/10/2025       34.0      35.5      37.5      39.0      47.3      55.8      60.2      8.25              0.906955
  04/11/2025       34.1      35.8      37.6      39.2      46.4      53.9      61.5      9.14              0.885549
  04/12/2025       33.6      35.1      36.7      38.1      46.8      52.3      61.7      9.99              0.850094
  04/13/2025       34.2      35.2      36.4      38.0      46.3      52.9      62.9     10.79              0.804145
  04/14/2025       30.2      31.3      32.4      34.3      41.2      47.6      59.1     11.53              0.736539
  04/15/2025       29.9      30.7      31.9      33.8      41.2      46.8      55.6     12.21              0.679184
  04/16/2025       29.9      30.8      31.7      33.5      40.1      46.9      52.8     12.85              0.640506
  04/17/2025       30.0      30.7      31.6      33.3      38.9      46.8      50.9     13.45              0.603563
  04/18/2025       30.3      30.7      31.6      33.5      38.9      46.5      49.7     14.04              0.582157
  04/19/2025       30.4      30.7      31.6      33.5      38.5      46.7      50.2     14.58              0.541164
  04/20/2025       30.6      31.0      32.0      34.1      40.4      47.1      49.7     15.07              0.491991
  04/21/2025       30.4      30.7      31.6      32.9      36.3      45.0      46.9     15.54              0.470421
  04/22/2025       30.5      30.7      31.8      33.3      36.3      43.6      47.1     16.00              0.458024
  04/23/2025       30.7      31.4      32.0      33.3      37.6      43.9      48.2     16.44              0.446288
  04/24/2025       31.2      32.4      33.3      34.8      38.2      44.7      51.1     16.88              0.433726
  04/25/2025       30.8      32.0      32.8      34.1      37.5      42.6      50.7     17.29              0.410089
  04/26/2025       31.2      32.0      33.3      36.1      40.4      43.7      49.5     17.68              0.393394
  04/27/2025       31.6      32.4      33.0      34.9      38.4      44.5      51.7     18.07              0.385626
  04/28/2025       31.6      33.1      34.4      35.8      39.6      44.1      57.7     18.43              0.365872
  04/29/2025       32.1      33.1      34.9      35.9      40.4      45.8      55.7     18.76              0.331576
  04/30/2025       31.8      32.4      33.4      35.5      37.4      44.2      55.2     19.08              0.318187
#
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Text Products (RNOHFSAJV and RNOHFSWSV)
Raw ESP April-July Streamflow Volumes Tracker
April to July Streamflow Volume Accumulation Forecast

Location Photographs

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast   (CAZ067)
Today: Sunny. Highs 72 to 82. Light winds becoming west up to 10 mph in the afternoon.

Tonight: Clear. Lows 50 to 58. Light winds.

Friday: Sunny. Highs 70 to 78. Light winds becoming southwest up to 10 mph in the afternoon.

Friday Night: Clear in the evening then becoming partly cloudy. Lows 47 to 53. Prevailing southwest winds up to 10 mph in the evening becoming light.

Saturday: Mostly cloudy. A chance of rain showers in the afternoon. Highs 58 to 68. Prevailing south winds up to 10 mph.

Saturday Night: Partly cloudy with a slight chance of rain showers. Lows 44 to 50.

Sunday: Partly cloudy with a slight chance of rain showers. Warmer. Highs 60 to 75.

Sunday Night: Mostly clear. Lows 47 to 53.

Monday through Wednesday: Clear. Highs 66 to 81. Lows 47 to 56.