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 21 2026 at 7:30 AM PDTNext Issuance: Oct 22 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:  10/21/2026 at 07:30 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/18/2026 at 01:00 PM PDT
# Maximum Observed Stage:                       41.59 Feet
# Maximum Observed Flow:                        1831 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/24/2026 at 03:00 AM PDT
# Maximum Forecast Stage:                       40.16 Feet
# Maximum Forecast Flow:                        1266 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  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           41.37           1740         +              Normal
  10/18/2026 08 AM PDT           41.42           1761         +              Normal
  10/18/2026 09 AM PDT           41.44           1769         +              Normal
  10/18/2026 10 AM PDT           41.48           1785         +              Normal
  10/18/2026 11 AM PDT           41.53           1806         +              Normal
  10/18/2026 12 PM PDT           41.56           1818         +              Normal
  10/18/2026 01 PM PDT           41.59           1831         +              Normal
  10/18/2026 02 PM PDT           41.58           1827         -              Normal
  10/18/2026 03 PM PDT           41.57           1823         -              Normal
  10/18/2026 04 PM PDT           41.54           1810         -              Normal
  10/18/2026 05 PM PDT           41.48           1785         -              Normal
  10/18/2026 06 PM PDT           41.43           1765         -              Normal
  10/18/2026 07 PM PDT           41.35           1732         -              Normal
  10/18/2026 08 PM PDT           41.27           1699         -              Normal
  10/18/2026 09 PM PDT           41.19           1667         -              Normal
  10/18/2026 10 PM PDT           41.11           1635         -              Normal
  10/18/2026 11 PM PDT           41.04           1607         -              Normal
  10/19/2026 12 AM PDT           40.98           1583         -              Normal
  10/19/2026 01 AM PDT           40.91           1555         -              Normal
  10/19/2026 02 AM PDT           40.85           1531         -              Normal
  10/19/2026 03 AM PDT           40.78           1504         -              Normal
  10/19/2026 04 AM PDT           40.74           1488         -              Normal
  10/19/2026 05 AM PDT           40.69           1469         -              Normal
  10/19/2026 06 AM PDT           40.66           1457         -              Normal
  10/19/2026 07 AM PDT           40.62           1441         -              Normal
  10/19/2026 08 AM PDT           40.58           1426         -              Normal
  10/19/2026 09 AM PDT           40.55           1414         -              Normal
  10/19/2026 10 AM PDT           40.54           1410         -              Normal
  10/19/2026 11 AM PDT           40.51           1399         -              Normal
  10/19/2026 12 PM PDT           40.47           1384         -              Normal
  10/19/2026 01 PM PDT           40.46           1380         -              Normal
  10/19/2026 02 PM PDT           40.42           1364         -              Normal
  10/19/2026 03 PM PDT           40.39           1353         -              Normal
  10/19/2026 04 PM PDT           40.33           1330         -              Normal
  10/19/2026 05 PM PDT           40.26           1304         -              Normal
  10/19/2026 06 PM PDT           40.19           1278         -              Normal
  10/19/2026 07 PM PDT           40.10           1244         -              Normal
  10/19/2026 08 PM PDT           40.03           1218         -              Normal
  10/19/2026 09 PM PDT           39.93           1181         -              Normal
  10/19/2026 10 PM PDT           39.83           1145         -              Normal
  10/19/2026 11 PM PDT           39.75           1116         -              Normal
  10/20/2026 12 AM PDT           39.67           1087         -              Normal
  10/20/2026 01 AM PDT           39.59           1059         -              Normal
  10/20/2026 02 AM PDT           39.52           1034         -              Normal
  10/20/2026 03 AM PDT           39.44           1006         -              Normal
  10/20/2026 04 AM PDT           39.38            985         -              Normal
  10/20/2026 05 AM PDT           39.32            964         -              Normal
  10/20/2026 06 AM PDT           39.26            944         -              Normal
  10/20/2026 07 AM PDT           39.22            930         -              Normal
  10/20/2026 08 AM PDT           39.18            916         -              Normal
  10/20/2026 09 AM PDT           39.13            899         -              Normal
  10/20/2026 10 AM PDT           39.10            889         -              Normal
  10/20/2026 11 AM PDT           39.07            879         -              Normal
  10/20/2026 12 PM PDT           39.04            869         -              Normal
  10/20/2026 01 PM PDT           39.01            859         -              Normal
  10/20/2026 02 PM PDT           38.93            830         -              Normal
  10/20/2026 03 PM PDT           38.88            812         -              Normal
  10/20/2026 04 PM PDT           38.83            793         -              Normal
  10/20/2026 05 PM PDT           38.74            761         -              Normal
  10/20/2026 06 PM PDT           38.59            708         -              Normal
  10/20/2026 07 PM PDT           38.53            687         -              Normal
  10/20/2026 08 PM PDT           38.46            663         -              Normal
  10/20/2026 09 PM PDT           38.39            639         -              Normal
  10/20/2026 10 PM PDT           38.32            615         -              Normal
  10/20/2026 11 PM PDT           38.25            592         -              Normal
  10/21/2026 12 AM PDT           38.18            568         -              Normal
  10/21/2026 01 AM PDT           38.11            545         -              Normal
  10/21/2026 02 AM PDT           38.05            526         -              Normal
  10/21/2026 03 AM PDT           37.98            504         -              Normal
  10/21/2026 04 AM PDT           37.93            488         -              Normal
  10/21/2026 05 AM PDT           37.87            469         -              Normal
  10/21/2026 06 AM PDT           37.81            450         -              Normal
  10/21/2026 07 AM PDT           37.78            441         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/21/2026 08 AM PDT           37.76            435                        Normal
  10/21/2026 09 AM PDT           37.74            429         -              Normal
  10/21/2026 10 AM PDT           37.72            423         -              Normal
  10/21/2026 11 AM PDT           37.70            417         -              Normal
  10/21/2026 12 PM PDT           37.68            411         -              Normal
  10/21/2026 01 PM PDT           37.67            408         -              Normal
  10/21/2026 02 PM PDT           37.66            405         -              Normal
  10/21/2026 03 PM PDT           37.65            402         -              Normal
  10/21/2026 04 PM PDT           37.64            399         -              Normal
  10/21/2026 05 PM PDT           37.63            396         -              Normal
  10/21/2026 06 PM PDT           37.66            405         +              Normal
  10/21/2026 07 PM PDT           37.74            429         +              Normal
  10/21/2026 08 PM PDT           37.81            450         +              Normal
  10/21/2026 09 PM PDT           37.88            472         +              Normal
  10/21/2026 10 PM PDT           37.93            488         +              Normal
  10/21/2026 11 PM PDT           37.98            504         +              Normal
  10/22/2026 12 AM PDT           38.02            516         +              Normal
  10/22/2026 01 AM PDT           38.06            529         +              Normal
  10/22/2026 02 AM PDT           38.10            542         +              Normal
  10/22/2026 03 AM PDT           38.13            552         +              Normal
  10/22/2026 04 AM PDT           38.15            558         +              Normal
  10/22/2026 05 AM PDT           38.18            568         +              Normal
  10/22/2026 06 AM PDT           38.20            575         +              Normal
  10/22/2026 07 AM PDT           38.22            582         +              Normal
  10/22/2026 08 AM PDT           38.23            585         +              Normal
  10/22/2026 09 AM PDT           38.25            592         +              Normal
  10/22/2026 10 AM PDT           38.26            595         +              Normal
  10/22/2026 11 AM PDT           38.27            598         +              Normal
  10/22/2026 12 PM PDT           38.28            602         +              Normal
  10/22/2026 01 PM PDT           38.30            608         +              Normal
  10/22/2026 02 PM PDT           38.30            608         0              Normal
  10/22/2026 03 PM PDT           38.35            625         +              Normal
  10/22/2026 04 PM PDT           38.45            659         +              Normal
  10/22/2026 05 PM PDT           38.57            701         +              Normal
  10/22/2026 06 PM PDT           38.67            736         +              Normal
  10/22/2026 07 PM PDT           38.77            772         +              Normal
  10/22/2026 08 PM PDT           38.85            801         +              Normal
  10/22/2026 09 PM PDT           38.93            830         +              Normal
  10/22/2026 10 PM PDT           38.99            852         +              Normal
  10/22/2026 11 PM PDT           39.06            876         +              Normal
  10/23/2026 12 AM PDT           39.11            893         +              Normal
  10/23/2026 01 AM PDT           39.16            909         +              Normal
  10/23/2026 02 AM PDT           39.21            926         +              Normal
  10/23/2026 03 AM PDT           39.25            940         +              Normal
  10/23/2026 04 AM PDT           39.29            954         +              Normal
  10/23/2026 05 AM PDT           39.32            964         +              Normal
  10/23/2026 06 AM PDT           39.35            975         +              Normal
  10/23/2026 07 AM PDT           39.38            985         +              Normal
  10/23/2026 08 AM PDT           39.40            992         +              Normal
  10/23/2026 09 AM PDT           39.42            999         +              Normal
  10/23/2026 10 AM PDT           39.44           1006         +              Normal
  10/23/2026 11 AM PDT           39.45           1009         +              Normal
  10/23/2026 12 PM PDT           39.47           1016         +              Normal
  10/23/2026 01 PM PDT           39.48           1020         +              Normal
  10/23/2026 02 PM PDT           39.52           1034         +              Normal
  10/23/2026 03 PM PDT           39.57           1052         +              Normal
  10/23/2026 04 PM PDT           39.61           1066         +              Normal
  10/23/2026 05 PM PDT           39.65           1080         +              Normal
  10/23/2026 06 PM PDT           39.69           1094         +              Normal
  10/23/2026 07 PM PDT           39.72           1105         +              Normal
  10/23/2026 08 PM PDT           39.75           1116         +              Normal
  10/23/2026 09 PM PDT           39.81           1138         +              Normal
  10/23/2026 10 PM PDT           39.89           1167         +              Normal
  10/23/2026 11 PM PDT           39.97           1196         +              Normal
  10/24/2026 12 AM PDT           40.04           1222         +              Normal
  10/24/2026 01 AM PDT           40.10           1244         +              Normal
  10/24/2026 02 AM PDT           40.15           1263         +              Normal
  10/24/2026 03 AM PDT           40.16           1266         +              Normal
  10/24/2026 04 AM PDT           40.14           1259         -              Normal
  10/24/2026 05 AM PDT           40.12           1251         -              Normal
  10/24/2026 06 AM PDT           40.10           1244         -              Normal
  10/24/2026 07 AM PDT           40.09           1240         -              Normal
  10/24/2026 08 AM PDT           40.07           1233         -              Normal
  10/24/2026 09 AM PDT           40.06           1229         -              Normal
  10/24/2026 10 AM PDT           40.05           1225         -              Normal
  10/24/2026 11 AM PDT           40.04           1222         -              Normal
  10/24/2026 12 PM PDT           40.01           1211         -              Normal
  10/24/2026 01 PM PDT           39.97           1196         -              Normal
  10/24/2026 02 PM PDT           39.91           1174         -              Normal
  10/24/2026 03 PM PDT           39.84           1148         -              Normal
  10/24/2026 04 PM PDT           39.77           1123         -              Normal
  10/24/2026 05 PM PDT           39.70           1098         -              Normal
  10/24/2026 06 PM PDT           39.64           1077         -              Normal
  10/24/2026 07 PM PDT           39.58           1055         -              Normal
  10/24/2026 08 PM PDT           39.53           1038         -              Normal
  10/24/2026 09 PM PDT           39.48           1020         -              Normal
  10/24/2026 10 PM PDT           39.44           1006         -              Normal
  10/24/2026 11 PM PDT           39.40            992         -              Normal
  10/25/2026 12 AM PDT           39.37            982         -              Normal
  10/25/2026 01 AM PDT           39.34            971         -              Normal
  10/25/2026 02 AM PDT           39.31            961         -              Normal
  10/25/2026 03 AM PDT           39.29            954         -              Normal
  10/25/2026 04 AM PDT           39.26            944         -              Normal
  10/25/2026 05 AM PDT           39.24            937         -              Normal
  10/25/2026 06 AM PDT           39.23            933         -              Normal
  10/25/2026 07 AM PDT           39.21            926         -              Normal
  10/25/2026 08 AM PDT           39.19            920         -              Normal
  10/25/2026 09 AM PDT           39.18            916         -              Normal
  10/25/2026 10 AM PDT           39.17            913         -              Normal
  10/25/2026 11 AM PDT           39.16            909         -              Normal
  10/25/2026 12 PM PDT           39.15            906         -              Normal
  10/25/2026 01 PM PDT           39.13            899         -              Normal
  10/25/2026 02 PM PDT           39.10            889         -              Normal
  10/25/2026 03 PM PDT           39.05            872         -              Normal
  10/25/2026 04 PM PDT           38.98            848         -              Normal
  10/25/2026 05 PM PDT           38.91            822         -              Normal
  10/25/2026 06 PM PDT           38.84            797         -              Normal
  10/25/2026 07 PM PDT           38.78            775         -              Normal
  10/25/2026 08 PM PDT           38.71            750         -              Normal
  10/25/2026 09 PM PDT           38.66            732         -              Normal
  10/25/2026 10 PM PDT           38.60            711         -              Normal
  10/25/2026 11 PM PDT           38.56            697         -              Normal
  10/26/2026 12 AM PDT           38.52            683         -              Normal
  10/26/2026 01 AM PDT           38.48            670         -              Normal
  10/26/2026 02 AM PDT           38.44            656         -              Normal
  10/26/2026 03 AM PDT           38.41            645         -              Normal
  10/26/2026 04 AM PDT           38.38            635         -              Normal
  10/26/2026 05 AM PDT           38.36            628         -              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.