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 15 2026 at 7:25 AM PDTNext Issuance: Oct 16 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:  10/15/2026 at 07:25 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/11/2026 at 12:00 AM PDT
# Maximum Observed Stage:                       37.12 Feet
# Maximum Observed Flow:                        253 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/18/2026 at 11:00 AM PDT
# Maximum Forecast Stage:                       40.32 Feet
# Maximum Forecast Flow:                        1326 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/10/2026 07 AM PDT           37.01            225                        Normal
  10/10/2026 08 AM PDT           37.01            225         0              Normal
  10/10/2026 09 AM PDT           37.01            225         0              Normal
  10/10/2026 10 AM PDT           37.02            228         +              Normal
  10/10/2026 11 AM PDT           37.03            230         +              Normal
  10/10/2026 12 PM PDT           37.06            238         +              Normal
  10/10/2026 01 PM PDT           37.08            243         +              Normal
  10/10/2026 02 PM PDT           37.10            248         +              Normal
  10/10/2026 03 PM PDT           37.09            246         -              Normal
  10/10/2026 04 PM PDT           37.09            246         0              Normal
  10/10/2026 05 PM PDT           37.08            243         -              Normal
  10/10/2026 06 PM PDT           37.08            243         0              Normal
  10/10/2026 07 PM PDT           37.08            243         0              Normal
  10/10/2026 08 PM PDT           37.08            243         0              Normal
  10/10/2026 09 PM PDT           37.07            241         -              Normal
  10/10/2026 10 PM PDT           37.08            243         +              Normal
  10/10/2026 11 PM PDT           37.10            248         +              Normal
  10/11/2026 12 AM PDT           37.12            253         +              Normal
  10/11/2026 01 AM PDT           37.11            251         -              Normal
  10/11/2026 02 AM PDT           37.10            248         -              Normal
  10/11/2026 03 AM PDT           37.09            246         -              Normal
  10/11/2026 04 AM PDT           37.07            241         -              Normal
  10/11/2026 05 AM PDT           37.06            238         -              Normal
  10/11/2026 06 AM PDT           37.05            235         -              Normal
  10/11/2026 07 AM PDT           37.05            235         0              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
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/15/2026 08 AM PDT           36.99            220                        Normal
  10/15/2026 09 AM PDT           36.99            220         0              Normal
  10/15/2026 10 AM PDT           36.98            218         -              Normal
  10/15/2026 11 AM PDT           36.98            218         0              Normal
  10/15/2026 12 PM PDT           36.99            220         +              Normal
  10/15/2026 01 PM PDT           36.99            220         0              Normal
  10/15/2026 02 PM PDT           36.99            220         0              Normal
  10/15/2026 03 PM PDT           36.99            220         0              Normal
  10/15/2026 04 PM PDT           36.99            220         0              Normal
  10/15/2026 05 PM PDT           37.04            233         +              Normal
  10/15/2026 06 PM PDT           37.13            256         +              Normal
  10/15/2026 07 PM PDT           37.21            277         +              Normal
  10/15/2026 08 PM PDT           37.28            296         +              Normal
  10/15/2026 09 PM PDT           37.35            315         +              Normal
  10/15/2026 10 PM PDT           37.40            329         +              Normal
  10/15/2026 11 PM PDT           37.45            344         +              Normal
  10/16/2026 12 AM PDT           37.50            358         +              Normal
  10/16/2026 01 AM PDT           37.53            367         +              Normal
  10/16/2026 02 AM PDT           37.57            378         +              Normal
  10/16/2026 03 AM PDT           37.60            387         +              Normal
  10/16/2026 04 AM PDT           37.63            396         +              Normal
  10/16/2026 05 AM PDT           37.65            402         +              Normal
  10/16/2026 06 AM PDT           37.67            408         +              Normal
  10/16/2026 07 AM PDT           37.69            414         +              Normal
  10/16/2026 08 AM PDT           37.71            420         +              Normal
  10/16/2026 09 AM PDT           37.73            426         +              Normal
  10/16/2026 10 AM PDT           37.74            429         +              Normal
  10/16/2026 11 AM PDT           37.75            432         +              Normal
  10/16/2026 12 PM PDT           37.76            435         +              Normal
  10/16/2026 01 PM PDT           37.77            438         +              Normal
  10/16/2026 02 PM PDT           37.78            441         +              Normal
  10/16/2026 03 PM PDT           37.84            460         +              Normal
  10/16/2026 04 PM PDT           37.97            500         +              Normal
  10/16/2026 05 PM PDT           38.10            542         +              Normal
  10/16/2026 06 PM PDT           38.21            578         +              Normal
  10/16/2026 07 PM PDT           38.30            608         +              Normal
  10/16/2026 08 PM PDT           38.39            639         +              Normal
  10/16/2026 09 PM PDT           38.47            666         +              Normal
  10/16/2026 10 PM PDT           38.53            687         +              Normal
  10/16/2026 11 PM PDT           38.59            708         +              Normal
  10/17/2026 12 AM PDT           38.64            725         +              Normal
  10/17/2026 01 AM PDT           38.69            743         +              Normal
  10/17/2026 02 AM PDT           38.73            757         +              Normal
  10/17/2026 03 AM PDT           38.77            772         +              Normal
  10/17/2026 04 AM PDT           38.80            782         +              Normal
  10/17/2026 05 AM PDT           38.83            793         +              Normal
  10/17/2026 06 AM PDT           38.86            804         +              Normal
  10/17/2026 07 AM PDT           38.88            812         +              Normal
  10/17/2026 08 AM PDT           38.90            819         +              Normal
  10/17/2026 09 AM PDT           38.92            826         +              Normal
  10/17/2026 10 AM PDT           38.94            833         +              Normal
  10/17/2026 11 AM PDT           38.95            837         +              Normal
  10/17/2026 12 PM PDT           39.00            856         +              Normal
  10/17/2026 01 PM PDT           39.10            889         +              Normal
  10/17/2026 02 PM PDT           39.20            923         +              Normal
  10/17/2026 03 PM PDT           39.32            964         +              Normal
  10/17/2026 04 PM PDT           39.44           1006         +              Normal
  10/17/2026 05 PM PDT           39.55           1045         +              Normal
  10/17/2026 06 PM PDT           39.65           1080         +              Normal
  10/17/2026 07 PM PDT           39.73           1109         +              Normal
  10/17/2026 08 PM PDT           39.81           1138         +              Normal
  10/17/2026 09 PM PDT           39.88           1163         +              Normal
  10/17/2026 10 PM PDT           39.94           1185         +              Normal
  10/17/2026 11 PM PDT           39.99           1203         +              Normal
  10/18/2026 12 AM PDT           40.04           1222         +              Normal
  10/18/2026 01 AM PDT           40.08           1237         +              Normal
  10/18/2026 02 AM PDT           40.12           1251         +              Normal
  10/18/2026 03 AM PDT           40.15           1263         +              Normal
  10/18/2026 04 AM PDT           40.18           1274         +              Normal
  10/18/2026 05 AM PDT           40.21           1285         +              Normal
  10/18/2026 06 AM PDT           40.23           1293         +              Normal
  10/18/2026 07 AM PDT           40.26           1304         +              Normal
  10/18/2026 08 AM PDT           40.28           1311         +              Normal
  10/18/2026 09 AM PDT           40.29           1315         +              Normal
  10/18/2026 10 AM PDT           40.31           1323         +              Normal
  10/18/2026 11 AM PDT           40.32           1326         +              Normal
  10/18/2026 12 PM PDT           40.31           1323         -              Normal
  10/18/2026 01 PM PDT           40.25           1300         -              Normal
  10/18/2026 02 PM PDT           40.18           1274         -              Normal
  10/18/2026 03 PM PDT           40.10           1244         -              Normal
  10/18/2026 04 PM PDT           40.01           1211         -              Normal
  10/18/2026 05 PM PDT           39.91           1174         -              Normal
  10/18/2026 06 PM PDT           39.83           1145         -              Normal
  10/18/2026 07 PM PDT           39.75           1116         -              Normal
  10/18/2026 08 PM PDT           39.69           1094         -              Normal
  10/18/2026 09 PM PDT           39.63           1073         -              Normal
  10/18/2026 10 PM PDT           39.57           1052         -              Normal
  10/18/2026 11 PM PDT           39.52           1034         -              Normal
  10/19/2026 12 AM PDT           39.48           1020         -              Normal
  10/19/2026 01 AM PDT           39.44           1006         -              Normal
  10/19/2026 02 AM PDT           39.40            992         -              Normal
  10/19/2026 03 AM PDT           39.37            982         -              Normal
  10/19/2026 04 AM PDT           39.34            971         -              Normal
  10/19/2026 05 AM PDT           39.32            964         -              Normal
  10/19/2026 06 AM PDT           39.29            954         -              Normal
  10/19/2026 07 AM PDT           39.27            947         -              Normal
  10/19/2026 08 AM PDT           39.25            940         -              Normal
  10/19/2026 09 AM PDT           39.24            937         -              Normal
  10/19/2026 10 AM PDT           39.22            930         -              Normal
  10/19/2026 11 AM PDT           39.21            926         -              Normal
  10/19/2026 12 PM PDT           39.19            920         -              Normal
  10/19/2026 01 PM PDT           39.16            909         -              Normal
  10/19/2026 02 PM PDT           39.11            893         -              Normal
  10/19/2026 03 PM PDT           39.03            866         -              Normal
  10/19/2026 04 PM PDT           38.95            837         -              Normal
  10/19/2026 05 PM PDT           38.88            812         -              Normal
  10/19/2026 06 PM PDT           38.79            779         -              Normal
  10/19/2026 07 PM PDT           38.70            747         -              Normal
  10/19/2026 08 PM PDT           38.62            718         -              Normal
  10/19/2026 09 PM PDT           38.54            690         -              Normal
  10/19/2026 10 PM PDT           38.47            666         -              Normal
  10/19/2026 11 PM PDT           38.41            645         -              Normal
  10/20/2026 12 AM PDT           38.36            628         -              Normal
  10/20/2026 01 AM PDT           38.31            612         -              Normal
  10/20/2026 02 AM PDT           38.26            595         -              Normal
  10/20/2026 03 AM PDT           38.22            582         -              Normal
  10/20/2026 04 AM PDT           38.19            572         -              Normal
  10/20/2026 05 AM PDT           38.15            558         -              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.