TUOLUMNE RIVER - MODESTO (MDSC1)
Latitude: 37.63º NLongitude: 120.99º WElevation: 60 FeetForecast Type: Official Location
Location: Stanislaus County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Oct 16 2026 at 7:30 AM PDTNext Issuance: Oct 17 2026 at 9:00 AM PDT
Action: 50.5 FeetMinor Flood: 55.0 FeetModerate Flood: 66.0 FeetMajor Flood: 67.0 Feet

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Tuolumne River - Modesto (MDSC1)
#
# File Generation Time:  10/16/2026 at 07:30 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/16/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       37.66 Feet
# Maximum Observed Flow:                        405 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/18/2026 at 11:00 AM PDT
# Maximum Forecast Stage:                       40.33 Feet
# Maximum Forecast Flow:                        1330 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/11/2026 07 AM PDT           37.05            235                        Normal
  10/11/2026 08 AM PDT           37.05            235         0              Normal
  10/11/2026 09 AM PDT           37.06            238         +              Normal
  10/11/2026 10 AM PDT           37.06            238         0              Normal
  10/11/2026 11 AM PDT           37.06            238         0              Normal
  10/11/2026 12 PM PDT           37.06            238         0              Normal
  10/11/2026 01 PM PDT           37.06            238         0              Normal
  10/11/2026 02 PM PDT           37.06            238         0              Normal
  10/11/2026 03 PM PDT           37.06            238         0              Normal
  10/11/2026 04 PM PDT           37.06            238         0              Normal
  10/11/2026 05 PM PDT           37.05            235         -              Normal
  10/11/2026 06 PM PDT           37.04            233         -              Normal
  10/11/2026 07 PM PDT           37.04            233         0              Normal
  10/11/2026 08 PM PDT           37.03            230         -              Normal
  10/11/2026 09 PM PDT           37.03            230         0              Normal
  10/11/2026 10 PM PDT           37.03            230         0              Normal
  10/11/2026 11 PM PDT           37.03            230         0              Normal
  10/12/2026 12 AM PDT           37.03            230         0              Normal
  10/12/2026 01 AM PDT           37.03            230         0              Normal
  10/12/2026 02 AM PDT           37.04            233         +              Normal
  10/12/2026 03 AM PDT           37.04            233         0              Normal
  10/12/2026 04 AM PDT           37.05            235         +              Normal
  10/12/2026 05 AM PDT           37.05            235         0              Normal
  10/12/2026 06 AM PDT           37.05            235         0              Normal
  10/12/2026 07 AM PDT           37.05            235         0              Normal
  10/12/2026 08 AM PDT           37.07            241         +              Normal
  10/12/2026 09 AM PDT           37.09            246         +              Normal
  10/12/2026 10 AM PDT           37.10            248         +              Normal
  10/12/2026 11 AM PDT           37.10            248         0              Normal
  10/12/2026 12 PM PDT           37.08            243         -              Normal
  10/12/2026 01 PM PDT           37.07            241         -              Normal
  10/12/2026 02 PM PDT           37.06            238         -              Normal
  10/12/2026 03 PM PDT           37.05            235         -              Normal
  10/12/2026 04 PM PDT           37.04            233         -              Normal
  10/12/2026 05 PM PDT           37.03            230         -              Normal
  10/12/2026 06 PM PDT           37.02            228         -              Normal
  10/12/2026 07 PM PDT           37.01            225         -              Normal
  10/12/2026 08 PM PDT           37.01            225         0              Normal
  10/12/2026 09 PM PDT           37.01            225         0              Normal
  10/12/2026 10 PM PDT           37.02            228         +              Normal
  10/12/2026 11 PM PDT           37.03            230         +              Normal
  10/13/2026 12 AM PDT           37.03            230         0              Normal
  10/13/2026 01 AM PDT           37.04            233         +              Normal
  10/13/2026 02 AM PDT           37.03            230         -              Normal
  10/13/2026 03 AM PDT           37.04            233         +              Normal
  10/13/2026 04 AM PDT           37.04            233         0              Normal
  10/13/2026 05 AM PDT           37.06            238         +              Normal
  10/13/2026 06 AM PDT           37.07            241         +              Normal
  10/13/2026 07 AM PDT           37.07            241         0              Normal
  10/13/2026 08 AM PDT           37.07            241         0              Normal
  10/13/2026 09 AM PDT           37.07            241         0              Normal
  10/13/2026 10 AM PDT           37.07            241         0              Normal
  10/13/2026 11 AM PDT           37.07            241         0              Normal
  10/13/2026 12 PM PDT           37.08            243         +              Normal
  10/13/2026 01 PM PDT           37.08            243         0              Normal
  10/13/2026 02 PM PDT           37.08            243         0              Normal
  10/13/2026 03 PM PDT           37.09            246         +              Normal
  10/13/2026 04 PM PDT           37.09            246         0              Normal
  10/13/2026 05 PM PDT           37.09            246         0              Normal
  10/13/2026 06 PM PDT           37.10            248         +              Normal
  10/13/2026 07 PM PDT           37.09            246         -              Normal
  10/13/2026 08 PM PDT           37.09            246         0              Normal
  10/13/2026 09 PM PDT           37.08            243         -              Normal
  10/13/2026 10 PM PDT           37.07            241         -              Normal
  10/13/2026 11 PM PDT           37.06            238         -              Normal
  10/14/2026 12 AM PDT           37.05            235         -              Normal
  10/14/2026 01 AM PDT           37.03            230         -              Normal
  10/14/2026 02 AM PDT           37.03            230         0              Normal
  10/14/2026 03 AM PDT           37.02            228         -              Normal
  10/14/2026 04 AM PDT           37.02            228         0              Normal
  10/14/2026 05 AM PDT           37.01            225         -              Normal
  10/14/2026 06 AM PDT           37.01            225         0              Normal
  10/14/2026 07 AM PDT           37.01            225         0              Normal
  10/14/2026 08 AM PDT           37.00            223         -              Normal
  10/14/2026 09 AM PDT           37.01            225         +              Normal
  10/14/2026 10 AM PDT           37.01            225         0              Normal
  10/14/2026 11 AM PDT           37.01            225         0              Normal
  10/14/2026 12 PM PDT           37.01            225         0              Normal
  10/14/2026 01 PM PDT           37.02            228         +              Normal
  10/14/2026 02 PM PDT           37.04            233         +              Normal
  10/14/2026 03 PM PDT           37.04            233         0              Normal
  10/14/2026 04 PM PDT           37.04            233         0              Normal
  10/14/2026 05 PM PDT           37.03            230         -              Normal
  10/14/2026 06 PM PDT           37.02            228         -              Normal
  10/14/2026 07 PM PDT           37.01            225         -              Normal
  10/14/2026 08 PM PDT           36.99            220         -              Normal
  10/14/2026 09 PM PDT           36.98            218         -              Normal
  10/14/2026 10 PM PDT           36.97            215         -              Normal
  10/14/2026 11 PM PDT           36.97            215         0              Normal
  10/15/2026 12 AM PDT           36.97            215         0              Normal
  10/15/2026 01 AM PDT           36.97            215         0              Normal
  10/15/2026 02 AM PDT           36.97            215         0              Normal
  10/15/2026 03 AM PDT           36.98            218         +              Normal
  10/15/2026 04 AM PDT           36.98            218         0              Normal
  10/15/2026 05 AM PDT           36.99            220         +              Normal
  10/15/2026 06 AM PDT           36.99            220         0              Normal
  10/15/2026 07 AM PDT           36.99            220         0              Normal
  10/15/2026 08 AM PDT           36.99            220         0              Normal
  10/15/2026 09 AM PDT           37.00            223         +              Normal
  10/15/2026 10 AM PDT           37.00            223         0              Normal
  10/15/2026 11 AM PDT           37.01            225         +              Normal
  10/15/2026 12 PM PDT           37.01            225         0              Normal
  10/15/2026 01 PM PDT           37.02            228         +              Normal
  10/15/2026 02 PM PDT           37.02            228         0              Normal
  10/15/2026 03 PM PDT           37.02            228         0              Normal
  10/15/2026 04 PM PDT           37.03            230         +              Normal
  10/15/2026 05 PM PDT           37.03            230         0              Normal
  10/15/2026 06 PM PDT           37.04            233         +              Normal
  10/15/2026 07 PM PDT           37.04            233         0              Normal
  10/15/2026 08 PM PDT           37.04            233         0              Normal
  10/15/2026 09 PM PDT           37.06            238         +              Normal
  10/15/2026 10 PM PDT           37.08            243         +              Normal
  10/15/2026 11 PM PDT           37.11            251         +              Normal
  10/16/2026 12 AM PDT           37.17            267         +              Normal
  10/16/2026 01 AM PDT           37.23            283         +              Normal
  10/16/2026 02 AM PDT           37.31            304         +              Normal
  10/16/2026 03 AM PDT           37.38            324         +              Normal
  10/16/2026 04 AM PDT           37.47            349         +              Normal
  10/16/2026 05 AM PDT           37.56            375         +              Normal
  10/16/2026 06 AM PDT           37.64            399         +              Normal
  10/16/2026 07 AM PDT           37.66            405         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/16/2026 08 AM PDT           37.67            408                        Normal
  10/16/2026 09 AM PDT           37.69            414         +              Normal
  10/16/2026 10 AM PDT           37.70            417         +              Normal
  10/16/2026 11 AM PDT           37.71            420         +              Normal
  10/16/2026 12 PM PDT           37.73            426         +              Normal
  10/16/2026 01 PM PDT           37.75            432         +              Normal
  10/16/2026 02 PM PDT           37.81            450         +              Normal
  10/16/2026 03 PM PDT           37.92            485         +              Normal
  10/16/2026 04 PM PDT           38.06            529         +              Normal
  10/16/2026 05 PM PDT           38.18            568         +              Normal
  10/16/2026 06 PM PDT           38.28            602         +              Normal
  10/16/2026 07 PM PDT           38.37            632         +              Normal
  10/16/2026 08 PM PDT           38.45            659         +              Normal
  10/16/2026 09 PM PDT           38.52            683         +              Normal
  10/16/2026 10 PM PDT           38.58            704         +              Normal
  10/16/2026 11 PM PDT           38.64            725         +              Normal
  10/17/2026 12 AM PDT           38.69            743         +              Normal
  10/17/2026 01 AM PDT           38.73            757         +              Normal
  10/17/2026 02 AM PDT           38.77            772         +              Normal
  10/17/2026 03 AM PDT           38.80            782         +              Normal
  10/17/2026 04 AM PDT           38.83            793         +              Normal
  10/17/2026 05 AM PDT           38.86            804         +              Normal
  10/17/2026 06 AM PDT           38.89            815         +              Normal
  10/17/2026 07 AM PDT           38.91            822         +              Normal
  10/17/2026 08 AM PDT           38.93            830         +              Normal
  10/17/2026 09 AM PDT           38.95            837         +              Normal
  10/17/2026 10 AM PDT           38.96            841         +              Normal
  10/17/2026 11 AM PDT           38.97            845         +              Normal
  10/17/2026 12 PM PDT           39.02            862         +              Normal
  10/17/2026 01 PM PDT           39.12            896         +              Normal
  10/17/2026 02 PM PDT           39.22            930         +              Normal
  10/17/2026 03 PM PDT           39.34            971         +              Normal
  10/17/2026 04 PM PDT           39.46           1013         +              Normal
  10/17/2026 05 PM PDT           39.57           1052         +              Normal
  10/17/2026 06 PM PDT           39.66           1084         +              Normal
  10/17/2026 07 PM PDT           39.75           1116         +              Normal
  10/17/2026 08 PM PDT           39.83           1145         +              Normal
  10/17/2026 09 PM PDT           39.89           1167         +              Normal
  10/17/2026 10 PM PDT           39.95           1189         +              Normal
  10/17/2026 11 PM PDT           40.01           1211         +              Normal
  10/18/2026 12 AM PDT           40.05           1225         +              Normal
  10/18/2026 01 AM PDT           40.09           1240         +              Normal
  10/18/2026 02 AM PDT           40.13           1255         +              Normal
  10/18/2026 03 AM PDT           40.17           1270         +              Normal
  10/18/2026 04 AM PDT           40.20           1281         +              Normal
  10/18/2026 05 AM PDT           40.22           1289         +              Normal
  10/18/2026 06 AM PDT           40.25           1300         +              Normal
  10/18/2026 07 AM PDT           40.27           1308         +              Normal
  10/18/2026 08 AM PDT           40.29           1315         +              Normal
  10/18/2026 09 AM PDT           40.30           1319         +              Normal
  10/18/2026 10 AM PDT           40.32           1326         +              Normal
  10/18/2026 11 AM PDT           40.33           1330         +              Normal
  10/18/2026 12 PM PDT           40.32           1326         -              Normal
  10/18/2026 01 PM PDT           40.26           1304         -              Normal
  10/18/2026 02 PM PDT           40.19           1278         -              Normal
  10/18/2026 03 PM PDT           40.11           1248         -              Normal
  10/18/2026 04 PM PDT           40.02           1214         -              Normal
  10/18/2026 05 PM PDT           39.92           1178         -              Normal
  10/18/2026 06 PM PDT           39.84           1148         -              Normal
  10/18/2026 07 PM PDT           39.77           1123         -              Normal
  10/18/2026 08 PM PDT           39.70           1098         -              Normal
  10/18/2026 09 PM PDT           39.64           1077         -              Normal
  10/18/2026 10 PM PDT           39.58           1055         -              Normal
  10/18/2026 11 PM PDT           39.53           1038         -              Normal
  10/19/2026 12 AM PDT           39.49           1023         -              Normal
  10/19/2026 01 AM PDT           39.45           1009         -              Normal
  10/19/2026 02 AM PDT           39.41            995         -              Normal
  10/19/2026 03 AM PDT           39.38            985         -              Normal
  10/19/2026 04 AM PDT           39.35            975         -              Normal
  10/19/2026 05 AM PDT           39.33            968         -              Normal
  10/19/2026 06 AM PDT           39.30            957         -              Normal
  10/19/2026 07 AM PDT           39.28            950         -              Normal
  10/19/2026 08 AM PDT           39.27            947         -              Normal
  10/19/2026 09 AM PDT           39.25            940         -              Normal
  10/19/2026 10 AM PDT           39.23            933         -              Normal
  10/19/2026 11 AM PDT           39.22            930         -              Normal
  10/19/2026 12 PM PDT           39.20            923         -              Normal
  10/19/2026 01 PM PDT           39.17            913         -              Normal
  10/19/2026 02 PM PDT           39.12            896         -              Normal
  10/19/2026 03 PM PDT           39.04            869         -              Normal
  10/19/2026 04 PM PDT           38.96            841         -              Normal
  10/19/2026 05 PM PDT           38.88            812         -              Normal
  10/19/2026 06 PM PDT           38.80            782         -              Normal
  10/19/2026 07 PM PDT           38.71            750         -              Normal
  10/19/2026 08 PM PDT           38.62            718         -              Normal
  10/19/2026 09 PM PDT           38.55            694         -              Normal
  10/19/2026 10 PM PDT           38.48            670         -              Normal
  10/19/2026 11 PM PDT           38.42            649         -              Normal
  10/20/2026 12 AM PDT           38.37            632         -              Normal
  10/20/2026 01 AM PDT           38.32            615         -              Normal
  10/20/2026 02 AM PDT           38.27            598         -              Normal
  10/20/2026 03 AM PDT           38.23            585         -              Normal
  10/20/2026 04 AM PDT           38.20            575         -              Normal
  10/20/2026 05 AM PDT           38.16            562         -              Normal
  10/20/2026 06 AM PDT           38.14            555         -              Normal
  10/20/2026 07 AM PDT           38.11            545         -              Normal
  10/20/2026 08 AM PDT           38.09            539         -              Normal
  10/20/2026 09 AM PDT           38.06            529         -              Normal
  10/20/2026 10 AM PDT           38.05            526         -              Normal
  10/20/2026 11 AM PDT           38.03            520         -              Normal
  10/20/2026 12 PM PDT           38.01            513         -              Normal
  10/20/2026 01 PM PDT           38.00            510         -              Normal
  10/20/2026 02 PM PDT           37.99            507         -              Normal
  10/20/2026 03 PM PDT           37.97            500         -              Normal
  10/20/2026 04 PM PDT           37.92            485         -              Normal
  10/20/2026 05 PM PDT           37.86            466         -              Normal
  10/20/2026 06 PM PDT           37.80            447         -              Normal
  10/20/2026 07 PM PDT           37.72            423         -              Normal
  10/20/2026 08 PM PDT           37.65            402         -              Normal
  10/20/2026 09 PM PDT           37.58            381         -              Normal
  10/20/2026 10 PM PDT           37.52            364         -              Normal
  10/20/2026 11 PM PDT           37.47            349         -              Normal
  10/21/2026 12 AM PDT           37.42            335         -              Normal
  10/21/2026 01 AM PDT           37.37            321         -              Normal
  10/21/2026 02 AM PDT           37.33            310         -              Normal
  10/21/2026 03 AM PDT           37.30            302         -              Normal
  10/21/2026 04 AM PDT           37.26            291         -              Normal
  10/21/2026 05 AM PDT           37.23            283         -              Normal
#
# 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.