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 18 2026 at 7:17 AM PDTNext Issuance: Oct 19 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:  10/18/2026 at 07:17 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/18/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       41.33 Feet
# Maximum Observed Flow:                        1724 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/18/2026 at 11:00 AM PDT
# Maximum Forecast Stage:                       41.40 Feet
# Maximum Forecast Flow:                        1753 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/13/2026 07 AM PDT           37.07            241                        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           37.72            423         +              Normal
  10/16/2026 08 AM PDT           37.79            444         +              Normal
  10/16/2026 09 AM PDT           37.86            466         +              Normal
  10/16/2026 10 AM PDT           37.92            485         +              Normal
  10/16/2026 11 AM PDT           37.97            500         +              Normal
  10/16/2026 12 PM PDT           38.03            520         +              Normal
  10/16/2026 01 PM PDT           38.06            529         +              Normal
  10/16/2026 02 PM PDT           38.11            545         +              Normal
  10/16/2026 03 PM PDT           38.15            558         +              Normal
  10/16/2026 04 PM PDT           38.21            578         +              Normal
  10/16/2026 05 PM PDT           38.27            598         +              Normal
  10/16/2026 06 PM PDT           38.36            628         +              Normal
  10/16/2026 07 PM PDT           38.47            666         +              Normal
  10/16/2026 08 PM PDT           38.57            701         +              Normal
  10/16/2026 09 PM PDT           38.67            736         +              Normal
  10/16/2026 10 PM PDT           38.77            772         +              Normal
  10/16/2026 11 PM PDT           38.89            815         +              Normal
  10/17/2026 12 AM PDT           39.00            856         +              Normal
  10/17/2026 01 AM PDT           39.09            886         +              Normal
  10/17/2026 02 AM PDT           39.20            923         +              Normal
  10/17/2026 03 AM PDT           39.31            961         +              Normal
  10/17/2026 04 AM PDT           39.40            992         +              Normal
  10/17/2026 05 AM PDT           39.46           1013         +              Normal
  10/17/2026 06 AM PDT           39.50           1027         +              Normal
  10/17/2026 07 AM PDT           39.54           1041         +              Normal
  10/17/2026 08 AM PDT           39.60           1062         +              Normal
  10/17/2026 09 AM PDT           39.63           1073         +              Normal
  10/17/2026 10 AM PDT           39.67           1087         +              Normal
  10/17/2026 11 AM PDT           39.69           1094         +              Normal
  10/17/2026 12 PM PDT           39.72           1105         +              Normal
  10/17/2026 01 PM PDT           39.76           1120         +              Normal
  10/17/2026 02 PM PDT           39.82           1141         +              Normal
  10/17/2026 03 PM PDT           39.89           1167         +              Normal
  10/17/2026 04 PM PDT           39.96           1192         +              Normal
  10/17/2026 05 PM PDT           40.05           1225         +              Normal
  10/17/2026 06 PM PDT           40.13           1255         +              Normal
  10/17/2026 07 PM PDT           40.25           1300         +              Normal
  10/17/2026 08 PM PDT           40.36           1342         +              Normal
  10/17/2026 09 PM PDT           40.49           1391         +              Normal
  10/17/2026 10 PM PDT           40.59           1430         +              Normal
  10/17/2026 11 PM PDT           40.72           1480         +              Normal
  10/18/2026 12 AM PDT           40.81           1516         +              Normal
  10/18/2026 01 AM PDT           40.94           1567         +              Normal
  10/18/2026 02 AM PDT           41.03           1603         +              Normal
  10/18/2026 03 AM PDT           41.10           1631         +              Normal
  10/18/2026 04 AM PDT           41.17           1659         +              Normal
  10/18/2026 05 AM PDT           41.24           1687         +              Normal
  10/18/2026 06 AM PDT           41.31           1716         +              Normal
  10/18/2026 07 AM PDT           41.33           1724         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/18/2026 08 AM PDT           41.35           1732                        Normal
  10/18/2026 09 AM PDT           41.37           1740         +              Normal
  10/18/2026 10 AM PDT           41.39           1748         +              Normal
  10/18/2026 11 AM PDT           41.40           1753         +              Normal
  10/18/2026 12 PM PDT           41.40           1753         0              Normal
  10/18/2026 01 PM PDT           41.36           1736         -              Normal
  10/18/2026 02 PM PDT           41.29           1708         -              Normal
  10/18/2026 03 PM PDT           41.20           1671         -              Normal
  10/18/2026 04 PM PDT           41.10           1631         -              Normal
  10/18/2026 05 PM PDT           41.01           1595         -              Normal
  10/18/2026 06 PM PDT           40.92           1559         -              Normal
  10/18/2026 07 PM PDT           40.84           1527         -              Normal
  10/18/2026 08 PM PDT           40.77           1500         -              Normal
  10/18/2026 09 PM PDT           40.70           1472         -              Normal
  10/18/2026 10 PM PDT           40.65           1453         -              Normal
  10/18/2026 11 PM PDT           40.59           1430         -              Normal
  10/19/2026 12 AM PDT           40.55           1414         -              Normal
  10/19/2026 01 AM PDT           40.51           1399         -              Normal
  10/19/2026 02 AM PDT           40.47           1384         -              Normal
  10/19/2026 03 AM PDT           40.44           1372         -              Normal
  10/19/2026 04 AM PDT           40.40           1357         -              Normal
  10/19/2026 05 AM PDT           40.38           1349         -              Normal
  10/19/2026 06 AM PDT           40.35           1338         -              Normal
  10/19/2026 07 AM PDT           40.33           1330         -              Normal
  10/19/2026 08 AM PDT           40.31           1323         -              Normal
  10/19/2026 09 AM PDT           40.29           1315         -              Normal
  10/19/2026 10 AM PDT           40.28           1311         -              Normal
  10/19/2026 11 AM PDT           40.26           1304         -              Normal
  10/19/2026 12 PM PDT           40.23           1293         -              Normal
  10/19/2026 01 PM PDT           40.16           1266         -              Normal
  10/19/2026 02 PM PDT           40.08           1237         -              Normal
  10/19/2026 03 PM PDT           40.00           1207         -              Normal
  10/19/2026 04 PM PDT           39.92           1178         -              Normal
  10/19/2026 05 PM PDT           39.82           1141         -              Normal
  10/19/2026 06 PM PDT           39.73           1109         -              Normal
  10/19/2026 07 PM PDT           39.65           1080         -              Normal
  10/19/2026 08 PM PDT           39.58           1055         -              Normal
  10/19/2026 09 PM PDT           39.52           1034         -              Normal
  10/19/2026 10 PM PDT           39.46           1013         -              Normal
  10/19/2026 11 PM PDT           39.40            992         -              Normal
  10/20/2026 12 AM PDT           39.35            975         -              Normal
  10/20/2026 01 AM PDT           39.31            961         -              Normal
  10/20/2026 02 AM PDT           39.27            947         -              Normal
  10/20/2026 03 AM PDT           39.24            937         -              Normal
  10/20/2026 04 AM PDT           39.21            926         -              Normal
  10/20/2026 05 AM PDT           39.18            916         -              Normal
  10/20/2026 06 AM PDT           39.15            906         -              Normal
  10/20/2026 07 AM PDT           39.13            899         -              Normal
  10/20/2026 08 AM PDT           39.11            893         -              Normal
  10/20/2026 09 AM PDT           39.09            886         -              Normal
  10/20/2026 10 AM PDT           39.07            879         -              Normal
  10/20/2026 11 AM PDT           39.06            876         -              Normal
  10/20/2026 12 PM PDT           39.05            872         -              Normal
  10/20/2026 01 PM PDT           39.03            866         -              Normal
  10/20/2026 02 PM PDT           39.00            856         -              Normal
  10/20/2026 03 PM PDT           38.96            841         -              Normal
  10/20/2026 04 PM PDT           38.91            822         -              Normal
  10/20/2026 05 PM PDT           38.85            801         -              Normal
  10/20/2026 06 PM PDT           38.79            779         -              Normal
  10/20/2026 07 PM PDT           38.73            757         -              Normal
  10/20/2026 08 PM PDT           38.67            736         -              Normal
  10/20/2026 09 PM PDT           38.62            718         -              Normal
  10/20/2026 10 PM PDT           38.58            704         -              Normal
  10/20/2026 11 PM PDT           38.54            690         -              Normal
  10/21/2026 12 AM PDT           38.50            676         -              Normal
  10/21/2026 01 AM PDT           38.47            666         -              Normal
  10/21/2026 02 AM PDT           38.44            656         -              Normal
  10/21/2026 03 AM PDT           38.41            645         -              Normal
  10/21/2026 04 AM PDT           38.39            639         -              Normal
  10/21/2026 05 AM PDT           38.37            632         -              Normal
  10/21/2026 06 AM PDT           38.35            625         -              Normal
  10/21/2026 07 AM PDT           38.33            618         -              Normal
  10/21/2026 08 AM PDT           38.32            615         -              Normal
  10/21/2026 09 AM PDT           38.30            608         -              Normal
  10/21/2026 10 AM PDT           38.29            605         -              Normal
  10/21/2026 11 AM PDT           38.28            602         -              Normal
  10/21/2026 12 PM PDT           38.27            598         -              Normal
  10/21/2026 01 PM PDT           38.26            595         -              Normal
  10/21/2026 02 PM PDT           38.25            592         -              Normal
  10/21/2026 03 PM PDT           38.24            588         -              Normal
  10/21/2026 04 PM PDT           38.24            588         0              Normal
  10/21/2026 05 PM PDT           38.27            598         +              Normal
  10/21/2026 06 PM PDT           38.35            625         +              Normal
  10/21/2026 07 PM PDT           38.41            645         +              Normal
  10/21/2026 08 PM PDT           38.47            666         +              Normal
  10/21/2026 09 PM PDT           38.52            683         +              Normal
  10/21/2026 10 PM PDT           38.56            697         +              Normal
  10/21/2026 11 PM PDT           38.60            711         +              Normal
  10/22/2026 12 AM PDT           38.64            725         +              Normal
  10/22/2026 01 AM PDT           38.67            736         +              Normal
  10/22/2026 02 AM PDT           38.70            747         +              Normal
  10/22/2026 03 AM PDT           38.72            754         +              Normal
  10/22/2026 04 AM PDT           38.75            765         +              Normal
  10/22/2026 05 AM PDT           38.77            772         +              Normal
  10/22/2026 06 AM PDT           38.79            779         +              Normal
  10/22/2026 07 AM PDT           38.81            786         +              Normal
  10/22/2026 08 AM PDT           38.83            793         +              Normal
  10/22/2026 09 AM PDT           38.85            801         +              Normal
  10/22/2026 10 AM PDT           38.86            804         +              Normal
  10/22/2026 11 AM PDT           38.87            808         +              Normal
  10/22/2026 12 PM PDT           38.88            812         +              Normal
  10/22/2026 01 PM PDT           38.92            826         +              Normal
  10/22/2026 02 PM PDT           38.98            848         +              Normal
  10/22/2026 03 PM PDT           39.08            882         +              Normal
  10/22/2026 04 PM PDT           39.20            923         +              Normal
  10/22/2026 05 PM PDT           39.30            957         +              Normal
  10/22/2026 06 PM PDT           39.40            992         +              Normal
  10/22/2026 07 PM PDT           39.48           1020         +              Normal
  10/22/2026 08 PM PDT           39.55           1045         +              Normal
  10/22/2026 09 PM PDT           39.62           1069         +              Normal
  10/22/2026 10 PM PDT           39.68           1091         +              Normal
  10/22/2026 11 PM PDT           39.73           1109         +              Normal
  10/23/2026 12 AM PDT           39.77           1123         +              Normal
  10/23/2026 01 AM PDT           39.81           1138         +              Normal
  10/23/2026 02 AM PDT           39.85           1152         +              Normal
  10/23/2026 03 AM PDT           39.88           1163         +              Normal
  10/23/2026 04 AM PDT           39.91           1174         +              Normal
  10/23/2026 05 AM PDT           39.93           1181         +              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.