MIDDLE FORK COSUMNES RIVER - SOMERSET (SOSC1)
Latitude: 38.62º NLongitude: 120.70º WElevation: 1821 FeetForecast Type: Unofficial Location
Location: El Dorado County in CaliforniaBulletin Group: San JoaquinRiver Group: North San Joaquin
Issuance Time: May 14 2026 at 9:09 AM PDTNext Issuance: May 15 2026 at 9:00 AM PDT
Action/Monitor: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Middle Fork Cosumnes River - Somerset (SOSC1)
#
# File Generation Time:  05/14/2026 at 09:10 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/09/2026 at 03:00 PM PDT
# Maximum Observed Stage:                       5.31 Feet
# Maximum Observed Flow:                        164 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/14/2026 at 10:00 AM PDT
# Maximum Forecast Stage:                       4.96 Feet
# Maximum Forecast Flow:                        112 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/09/2026 09 AM PDT            5.30            162                Not Applicable
  05/09/2026 10 AM PDT            5.29            160         -      Not Applicable
  05/09/2026 11 AM PDT            5.29            160         0      Not Applicable
  05/09/2026 12 PM PDT            5.30            162         +      Not Applicable
  05/09/2026 01 PM PDT            5.29            160         -      Not Applicable
  05/09/2026 02 PM PDT            5.29            160         0      Not Applicable
  05/09/2026 03 PM PDT            5.31            164         +      Not Applicable
  05/09/2026 04 PM PDT            5.28            159         -      Not Applicable
  05/09/2026 05 PM PDT            5.29            160         +      Not Applicable
  05/09/2026 06 PM PDT            5.28            159         -      Not Applicable
  05/09/2026 07 PM PDT            5.26            155         -      Not Applicable
  05/09/2026 08 PM PDT            5.27            157         +      Not Applicable
  05/09/2026 09 PM PDT            5.27            157         0      Not Applicable
  05/09/2026 10 PM PDT            5.24            152         -      Not Applicable
  05/09/2026 11 PM PDT            5.25            154         +      Not Applicable
  05/10/2026 12 AM PDT            5.24            152         -      Not Applicable
  05/10/2026 01 AM PDT            5.23            151         -      Not Applicable
  05/10/2026 02 AM PDT            5.23            151         0      Not Applicable
  05/10/2026 03 AM PDT            5.22            149         -      Not Applicable
  05/10/2026 04 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 05 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 06 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 07 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 08 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 09 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 10 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 11 AM PDT            5.22            149         0      Not Applicable
  05/10/2026 12 PM PDT            5.23            151         +      Not Applicable
  05/10/2026 01 PM PDT            5.22            149         -      Not Applicable
  05/10/2026 02 PM PDT            5.22            149         0      Not Applicable
  05/10/2026 03 PM PDT            5.22            149         0      Not Applicable
  05/10/2026 04 PM PDT            5.22            149         0      Not Applicable
  05/10/2026 05 PM PDT            5.22            149         0      Not Applicable
  05/10/2026 06 PM PDT            5.21            148         -      Not Applicable
  05/10/2026 07 PM PDT            5.20            146         -      Not Applicable
  05/10/2026 08 PM PDT            5.19            144         -      Not Applicable
  05/10/2026 09 PM PDT            5.18            143         -      Not Applicable
  05/10/2026 10 PM PDT            5.18            143         0      Not Applicable
  05/10/2026 11 PM PDT            5.18            143         0      Not Applicable
  05/11/2026 12 AM PDT            5.18            143         0      Not Applicable
  05/11/2026 01 AM PDT            5.16            140         -      Not Applicable
  05/11/2026 02 AM PDT            5.16            140         0      Not Applicable
  05/11/2026 03 AM PDT            5.15            138         -      Not Applicable
  05/11/2026 04 AM PDT            5.16            140         +      Not Applicable
  05/11/2026 05 AM PDT            5.15            138         -      Not Applicable
  05/11/2026 06 AM PDT            5.15            138         0      Not Applicable
  05/11/2026 07 AM PDT            5.15            138         0      Not Applicable
  05/11/2026 08 AM PDT            5.13            135         -      Not Applicable
  05/11/2026 09 AM PDT            5.14            137         +      Not Applicable
  05/11/2026 10 AM PDT            5.15            138         +      Not Applicable
  05/11/2026 11 AM PDT            5.15            138         0      Not Applicable
  05/11/2026 12 PM PDT            5.15            138         0      Not Applicable
  05/11/2026 01 PM PDT            5.15            138         0      Not Applicable
  05/11/2026 02 PM PDT            5.15            138         0      Not Applicable
  05/11/2026 03 PM PDT            5.15            138         0      Not Applicable
  05/11/2026 04 PM PDT            5.13            135         -      Not Applicable
  05/11/2026 05 PM PDT            5.13            135         0      Not Applicable
  05/11/2026 06 PM PDT            5.13            135         0      Not Applicable
  05/11/2026 07 PM PDT            5.13            135         0      Not Applicable
  05/11/2026 08 PM PDT            5.12            134         -      Not Applicable
  05/11/2026 09 PM PDT            5.11            132         -      Not Applicable
  05/11/2026 10 PM PDT            5.11            132         0      Not Applicable
  05/11/2026 11 PM PDT            5.10            131         -      Not Applicable
  05/12/2026 12 AM PDT            5.10            131         0      Not Applicable
  05/12/2026 01 AM PDT            5.09            130         -      Not Applicable
  05/12/2026 02 AM PDT            5.09            130         0      Not Applicable
  05/12/2026 03 AM PDT            5.08            128         -      Not Applicable
  05/12/2026 04 AM PDT            5.08            128         0      Not Applicable
  05/12/2026 05 AM PDT            5.08            128         0      Not Applicable
  05/12/2026 06 AM PDT            5.08            128         0      Not Applicable
  05/12/2026 07 AM PDT            5.08            128         0      Not Applicable
  05/12/2026 08 AM PDT            5.08            128         0      Not Applicable
  05/12/2026 09 AM PDT            5.07            127         -      Not Applicable
  05/12/2026 10 AM PDT            5.09            130         +      Not Applicable
  05/12/2026 11 AM PDT            5.08            128         -      Not Applicable
  05/12/2026 12 PM PDT            5.09            130         +      Not Applicable
  05/12/2026 01 PM PDT            5.08            128         -      Not Applicable
  05/12/2026 02 PM PDT            5.08            128         0      Not Applicable
  05/12/2026 03 PM PDT            5.08            128         0      Not Applicable
  05/12/2026 04 PM PDT            5.08            128         0      Not Applicable
  05/12/2026 05 PM PDT            5.07            127         -      Not Applicable
  05/12/2026 06 PM PDT            5.07            127         0      Not Applicable
  05/12/2026 07 PM PDT            5.06            125         -      Not Applicable
  05/12/2026 08 PM PDT            5.06            125         0      Not Applicable
  05/12/2026 09 PM PDT            5.05            124         -      Not Applicable
  05/12/2026 10 PM PDT            5.05            124         0      Not Applicable
  05/12/2026 11 PM PDT            5.04            122         -      Not Applicable
  05/13/2026 12 AM PDT            5.03            121         -      Not Applicable
  05/13/2026 01 AM PDT            5.03            121         0      Not Applicable
  05/13/2026 02 AM PDT            5.03            121         0      Not Applicable
  05/13/2026 03 AM PDT            5.02            120         -      Not Applicable
  05/13/2026 04 AM PDT            5.01            118         -      Not Applicable
  05/13/2026 05 AM PDT            5.02            120         +      Not Applicable
  05/13/2026 06 AM PDT            5.02            120         0      Not Applicable
  05/13/2026 07 AM PDT            5.02            120         0      Not Applicable
  05/13/2026 08 AM PDT            5.02            120         0      Not Applicable
  05/13/2026 09 AM PDT            5.01            118         -      Not Applicable
  05/13/2026 10 AM PDT            5.02            120         +      Not Applicable
  05/13/2026 11 AM PDT            5.02            120         0      Not Applicable
  05/13/2026 12 PM PDT            5.02            120         0      Not Applicable
  05/13/2026 01 PM PDT            5.02            120         0      Not Applicable
  05/13/2026 02 PM PDT            5.02            120         0      Not Applicable
  05/13/2026 03 PM PDT            5.02            120         0      Not Applicable
  05/13/2026 04 PM PDT            5.01            118         -      Not Applicable
  05/13/2026 05 PM PDT            5.01            118         0      Not Applicable
  05/13/2026 06 PM PDT            5.01            118         0      Not Applicable
  05/13/2026 07 PM PDT            5.01            118         0      Not Applicable
  05/13/2026 08 PM PDT            5.00            117         -      Not Applicable
  05/13/2026 09 PM PDT            5.00            117         0      Not Applicable
  05/13/2026 10 PM PDT            5.00            117         0      Not Applicable
  05/13/2026 11 PM PDT            4.99            116         -      Not Applicable
  05/14/2026 12 AM PDT            4.98            114         -      Not Applicable
  05/14/2026 01 AM PDT            4.98            114         0      Not Applicable
  05/14/2026 02 AM PDT            4.97            113         -      Not Applicable
  05/14/2026 03 AM PDT            4.97            113         0      Not Applicable
  05/14/2026 04 AM PDT            4.96            112         -      Not Applicable
  05/14/2026 05 AM PDT            4.97            113         +      Not Applicable
  05/14/2026 06 AM PDT            4.97            113         0      Not Applicable
  05/14/2026 07 AM PDT            4.96            112         -      Not Applicable
  05/14/2026 08 AM PDT            4.96            112         0      Not Applicable
  05/14/2026 09 AM PDT            4.96            112         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/14/2026 10 AM PDT            4.96            112                Not Applicable
  05/14/2026 11 AM PDT            4.95            110         -      Not Applicable
  05/14/2026 12 PM PDT            4.95            110         0      Not Applicable
  05/14/2026 01 PM PDT            4.95            110         0      Not Applicable
  05/14/2026 02 PM PDT            4.95            110         0      Not Applicable
  05/14/2026 03 PM PDT            4.94            109         -      Not Applicable
  05/14/2026 04 PM PDT            4.94            109         0      Not Applicable
  05/14/2026 05 PM PDT            4.94            109         0      Not Applicable
  05/14/2026 06 PM PDT            4.94            109         0      Not Applicable
  05/14/2026 07 PM PDT            4.93            108         -      Not Applicable
  05/14/2026 08 PM PDT            4.93            108         0      Not Applicable
  05/14/2026 09 PM PDT            4.93            108         0      Not Applicable
  05/14/2026 10 PM PDT            4.93            108         0      Not Applicable
  05/14/2026 11 PM PDT            4.93            108         0      Not Applicable
  05/15/2026 12 AM PDT            4.93            108         0      Not Applicable
  05/15/2026 01 AM PDT            4.92            106         -      Not Applicable
  05/15/2026 02 AM PDT            4.92            106         0      Not Applicable
  05/15/2026 03 AM PDT            4.92            106         0      Not Applicable
  05/15/2026 04 AM PDT            4.92            106         0      Not Applicable
  05/15/2026 05 AM PDT            4.92            106         0      Not Applicable
  05/15/2026 06 AM PDT            4.92            106         0      Not Applicable
  05/15/2026 07 AM PDT            4.91            105         -      Not Applicable
  05/15/2026 08 AM PDT            4.91            105         0      Not Applicable
  05/15/2026 09 AM PDT            4.91            105         0      Not Applicable
  05/15/2026 10 AM PDT            4.91            105         0      Not Applicable
  05/15/2026 11 AM PDT            4.91            105         0      Not Applicable
  05/15/2026 12 PM PDT            4.90            104         -      Not Applicable
  05/15/2026 01 PM PDT            4.90            104         0      Not Applicable
  05/15/2026 02 PM PDT            4.90            104         0      Not Applicable
  05/15/2026 03 PM PDT            4.90            104         0      Not Applicable
  05/15/2026 04 PM PDT            4.89            103         -      Not Applicable
  05/15/2026 05 PM PDT            4.89            103         0      Not Applicable
  05/15/2026 06 PM PDT            4.89            103         0      Not Applicable
  05/15/2026 07 PM PDT            4.89            103         0      Not Applicable
  05/15/2026 08 PM PDT            4.89            103         0      Not Applicable
  05/15/2026 09 PM PDT            4.89            103         0      Not Applicable
  05/15/2026 10 PM PDT            4.89            103         0      Not Applicable
  05/15/2026 11 PM PDT            4.88            102         -      Not Applicable
  05/16/2026 12 AM PDT            4.88            102         0      Not Applicable
  05/16/2026 01 AM PDT            4.88            102         0      Not Applicable
  05/16/2026 02 AM PDT            4.88            102         0      Not Applicable
  05/16/2026 03 AM PDT            4.88            102         0      Not Applicable
  05/16/2026 04 AM PDT            4.88            102         0      Not Applicable
  05/16/2026 05 AM PDT            4.88            102         0      Not Applicable
  05/16/2026 06 AM PDT            4.87            100         -      Not Applicable
  05/16/2026 07 AM PDT            4.87            100         0      Not Applicable
  05/16/2026 08 AM PDT            4.87            100         0      Not Applicable
  05/16/2026 09 AM PDT            4.87            100         0      Not Applicable
  05/16/2026 10 AM PDT            4.87            100         0      Not Applicable
  05/16/2026 11 AM PDT            4.86             99         -      Not Applicable
  05/16/2026 12 PM PDT            4.86             99         0      Not Applicable
  05/16/2026 01 PM PDT            4.86             99         0      Not Applicable
  05/16/2026 02 PM PDT            4.86             99         0      Not Applicable
  05/16/2026 03 PM PDT            4.86             99         0      Not Applicable
  05/16/2026 04 PM PDT            4.85             98         -      Not Applicable
  05/16/2026 05 PM PDT            4.85             98         0      Not Applicable
  05/16/2026 06 PM PDT            4.85             98         0      Not Applicable
  05/16/2026 07 PM PDT            4.85             98         0      Not Applicable
  05/16/2026 08 PM PDT            4.85             98         0      Not Applicable
  05/16/2026 09 PM PDT            4.85             98         0      Not Applicable
  05/16/2026 10 PM PDT            4.85             98         0      Not Applicable
  05/16/2026 11 PM PDT            4.84             97         -      Not Applicable
  05/17/2026 12 AM PDT            4.84             97         0      Not Applicable
  05/17/2026 01 AM PDT            4.84             97         0      Not Applicable
  05/17/2026 02 AM PDT            4.84             97         0      Not Applicable
  05/17/2026 03 AM PDT            4.84             97         0      Not Applicable
  05/17/2026 04 AM PDT            4.84             97         0      Not Applicable
  05/17/2026 05 AM PDT            4.84             97         0      Not Applicable
  05/17/2026 06 AM PDT            4.83             95         -      Not Applicable
  05/17/2026 07 AM PDT            4.83             95         0      Not Applicable
  05/17/2026 08 AM PDT            4.83             95         0      Not Applicable
  05/17/2026 09 AM PDT            4.83             95         0      Not Applicable
  05/17/2026 10 AM PDT            4.83             95         0      Not Applicable
  05/17/2026 11 AM PDT            4.83             95         0      Not Applicable
  05/17/2026 12 PM PDT            4.82             94         -      Not Applicable
  05/17/2026 01 PM PDT            4.82             94         0      Not Applicable
  05/17/2026 02 PM PDT            4.82             94         0      Not Applicable
  05/17/2026 03 PM PDT            4.82             94         0      Not Applicable
  05/17/2026 04 PM PDT            4.82             94         0      Not Applicable
  05/17/2026 05 PM PDT            4.82             94         0      Not Applicable
  05/17/2026 06 PM PDT            4.82             94         0      Not Applicable
  05/17/2026 07 PM PDT            4.82             94         0      Not Applicable
  05/17/2026 08 PM PDT            4.81             93         -      Not Applicable
  05/17/2026 09 PM PDT            4.81             93         0      Not Applicable
  05/17/2026 10 PM PDT            4.81             93         0      Not Applicable
  05/17/2026 11 PM PDT            4.81             93         0      Not Applicable
  05/18/2026 12 AM PDT            4.81             93         0      Not Applicable
  05/18/2026 01 AM PDT            4.81             93         0      Not Applicable
  05/18/2026 02 AM PDT            4.81             93         0      Not Applicable
  05/18/2026 03 AM PDT            4.81             93         0      Not Applicable
  05/18/2026 04 AM PDT            4.80             92         -      Not Applicable
  05/18/2026 05 AM PDT            4.80             92         0      Not Applicable
  05/18/2026 06 AM PDT            4.80             92         0      Not Applicable
  05/18/2026 07 AM PDT            4.80             92         0      Not Applicable
  05/18/2026 08 AM PDT            4.80             92         0      Not Applicable
  05/18/2026 09 AM PDT            4.80             92         0      Not Applicable
  05/18/2026 10 AM PDT            4.80             92         0      Not Applicable
  05/18/2026 11 AM PDT            4.80             92         0      Not Applicable
  05/18/2026 12 PM PDT            4.80             92         0      Not Applicable
  05/18/2026 01 PM PDT            4.79             90         -      Not Applicable
  05/18/2026 02 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 03 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 04 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 05 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 06 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 07 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 08 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 09 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 10 PM PDT            4.79             90         0      Not Applicable
  05/18/2026 11 PM PDT            4.79             90         0      Not Applicable
  05/19/2026 12 AM PDT            4.79             90         0      Not Applicable
  05/19/2026 01 AM PDT            4.79             90         0      Not Applicable
  05/19/2026 02 AM PDT            4.79             90         0      Not Applicable
  05/19/2026 03 AM PDT            4.79             90         0      Not Applicable
  05/19/2026 04 AM PDT            4.79             90         0      Not Applicable
  05/19/2026 05 AM PDT            4.79             90         0      Not Applicable
#
# NOTE 1: Stages are rounded to the nearest hundredth (.01) of a foot.
# NOTE 2: Flows are rounded to the nearest (1) cfs.
# NOTE 3: Trends are determined using hourly change in unrounded stage and flow.
# NOTE 4: Maximum Values are determined using unrounded stage and flow.