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 23 2026 at 8:08 AM PDTNext Issuance: Oct 24 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:  10/23/2026 at 08:09 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:                       39.83 Feet
# Maximum Forecast Flow:                        1145 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  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           37.76            435         -              Normal
  10/21/2026 08 AM PDT           37.71            420         -              Normal
  10/21/2026 09 AM PDT           37.66            405         -              Normal
  10/21/2026 10 AM PDT           37.62            393         -              Normal
  10/21/2026 11 AM PDT           37.58            381         -              Normal
  10/21/2026 12 PM PDT           37.54            370         -              Normal
  10/21/2026 01 PM PDT           37.50            358         -              Normal
  10/21/2026 02 PM PDT           37.46            346         -              Normal
  10/21/2026 03 PM PDT           37.44            341         -              Normal
  10/21/2026 04 PM PDT           37.41            332         -              Normal
  10/21/2026 05 PM PDT           37.38            324         -              Normal
  10/21/2026 06 PM PDT           37.35            315         -              Normal
  10/21/2026 07 PM PDT           37.33            310         -              Normal
  10/21/2026 08 PM PDT           37.31            304         -              Normal
  10/21/2026 09 PM PDT           37.30            302         -              Normal
  10/21/2026 10 PM PDT           37.30            302         0              Normal
  10/21/2026 11 PM PDT           37.32            307         +              Normal
  10/22/2026 12 AM PDT           37.35            315         +              Normal
  10/22/2026 01 AM PDT           37.39            327         +              Normal
  10/22/2026 02 AM PDT           37.44            341         +              Normal
  10/22/2026 03 AM PDT           37.51            361         +              Normal
  10/22/2026 04 AM PDT           37.61            390         +              Normal
  10/22/2026 05 AM PDT           37.71            420         +              Normal
  10/22/2026 06 AM PDT           37.79            444         +              Normal
  10/22/2026 07 AM PDT           37.86            466         +              Normal
  10/22/2026 08 AM PDT           37.91            481         +              Normal
  10/22/2026 09 AM PDT           37.96            497         +              Normal
  10/22/2026 10 AM PDT           38.00            510         +              Normal
  10/22/2026 11 AM PDT           38.04            523         +              Normal
  10/22/2026 12 PM PDT           38.05            526         +              Normal
  10/22/2026 01 PM PDT           38.07            532         +              Normal
  10/22/2026 02 PM PDT           38.09            539         +              Normal
  10/22/2026 03 PM PDT           38.11            545         +              Normal
  10/22/2026 04 PM PDT           38.13            552         +              Normal
  10/22/2026 05 PM PDT           38.16            562         +              Normal
  10/22/2026 06 PM PDT           38.22            582         +              Normal
  10/22/2026 07 PM PDT           38.27            598         +              Normal
  10/22/2026 08 PM PDT           38.34            622         +              Normal
  10/22/2026 09 PM PDT           38.42            649         +              Normal
  10/22/2026 10 PM PDT           38.50            676         +              Normal
  10/22/2026 11 PM PDT           38.55            694         +              Normal
  10/23/2026 12 AM PDT           38.64            725         +              Normal
  10/23/2026 01 AM PDT           38.71            750         +              Normal
  10/23/2026 02 AM PDT           38.78            775         +              Normal
  10/23/2026 03 AM PDT           38.85            801         +              Normal
  10/23/2026 04 AM PDT           38.90            819         +              Normal
  10/23/2026 05 AM PDT           38.96            841         +              Normal
  10/23/2026 06 AM PDT           38.99            852         +              Normal
  10/23/2026 07 AM PDT           39.01            859         +              Normal
  10/23/2026 08 AM PDT           39.04            869         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/23/2026 09 AM PDT           39.06            876                        Normal
  10/23/2026 10 AM PDT           39.08            882         +              Normal
  10/23/2026 11 AM PDT           39.10            889         +              Normal
  10/23/2026 12 PM PDT           39.12            896         +              Normal
  10/23/2026 01 PM PDT           39.13            899         +              Normal
  10/23/2026 02 PM PDT           39.16            909         +              Normal
  10/23/2026 03 PM PDT           39.20            923         +              Normal
  10/23/2026 04 PM PDT           39.24            937         +              Normal
  10/23/2026 05 PM PDT           39.29            954         +              Normal
  10/23/2026 06 PM PDT           39.33            968         +              Normal
  10/23/2026 07 PM PDT           39.36            978         +              Normal
  10/23/2026 08 PM PDT           39.39            988         +              Normal
  10/23/2026 09 PM PDT           39.45           1009         +              Normal
  10/23/2026 10 PM PDT           39.55           1045         +              Normal
  10/23/2026 11 PM PDT           39.62           1069         +              Normal
  10/24/2026 12 AM PDT           39.70           1098         +              Normal
  10/24/2026 01 AM PDT           39.76           1120         +              Normal
  10/24/2026 02 AM PDT           39.81           1138         +              Normal
  10/24/2026 03 AM PDT           39.83           1145         +              Normal
  10/24/2026 04 AM PDT           39.81           1138         -              Normal
  10/24/2026 05 AM PDT           39.79           1130         -              Normal
  10/24/2026 06 AM PDT           39.78           1127         -              Normal
  10/24/2026 07 AM PDT           39.76           1120         -              Normal
  10/24/2026 08 AM PDT           39.75           1116         -              Normal
  10/24/2026 09 AM PDT           39.74           1112         -              Normal
  10/24/2026 10 AM PDT           39.73           1109         -              Normal
  10/24/2026 11 AM PDT           39.72           1105         -              Normal
  10/24/2026 12 PM PDT           39.70           1098         -              Normal
  10/24/2026 01 PM PDT           39.65           1080         -              Normal
  10/24/2026 02 PM PDT           39.59           1059         -              Normal
  10/24/2026 03 PM PDT           39.52           1034         -              Normal
  10/24/2026 04 PM PDT           39.46           1013         -              Normal
  10/24/2026 05 PM PDT           39.39            988         -              Normal
  10/24/2026 06 PM PDT           39.33            968         -              Normal
  10/24/2026 07 PM PDT           39.27            947         -              Normal
  10/24/2026 08 PM PDT           39.22            930         -              Normal
  10/24/2026 09 PM PDT           39.17            913         -              Normal
  10/24/2026 10 PM PDT           39.13            899         -              Normal
  10/24/2026 11 PM PDT           39.09            886         -              Normal
  10/25/2026 12 AM PDT           39.06            876         -              Normal
  10/25/2026 01 AM PDT           39.03            866         -              Normal
  10/25/2026 02 AM PDT           39.00            856         -              Normal
  10/25/2026 03 AM PDT           38.98            848         -              Normal
  10/25/2026 04 AM PDT           38.96            841         -              Normal
  10/25/2026 05 AM PDT           38.94            833         -              Normal
  10/25/2026 06 AM PDT           38.92            826         -              Normal
  10/25/2026 07 AM PDT           38.91            822         -              Normal
  10/25/2026 08 AM PDT           38.90            819         -              Normal
  10/25/2026 09 AM PDT           38.88            812         -              Normal
  10/25/2026 10 AM PDT           38.87            808         -              Normal
  10/25/2026 11 AM PDT           38.87            808         0              Normal
  10/25/2026 12 PM PDT           38.86            804         -              Normal
  10/25/2026 01 PM PDT           38.84            797         -              Normal
  10/25/2026 02 PM PDT           38.81            786         -              Normal
  10/25/2026 03 PM PDT           38.76            768         -              Normal
  10/25/2026 04 PM PDT           38.70            747         -              Normal
  10/25/2026 05 PM PDT           38.63            722         -              Normal
  10/25/2026 06 PM PDT           38.56            697         -              Normal
  10/25/2026 07 PM PDT           38.49            673         -              Normal
  10/25/2026 08 PM PDT           38.42            649         -              Normal
  10/25/2026 09 PM PDT           38.37            632         -              Normal
  10/25/2026 10 PM PDT           38.31            612         -              Normal
  10/25/2026 11 PM PDT           38.27            598         -              Normal
  10/26/2026 12 AM PDT           38.22            582         -              Normal
  10/26/2026 01 AM PDT           38.18            568         -              Normal
  10/26/2026 02 AM PDT           38.15            558         -              Normal
  10/26/2026 03 AM PDT           38.12            549         -              Normal
  10/26/2026 04 AM PDT           38.09            539         -              Normal
  10/26/2026 05 AM PDT           38.06            529         -              Normal
  10/26/2026 06 AM PDT           38.04            523         -              Normal
  10/26/2026 07 AM PDT           38.02            516         -              Normal
  10/26/2026 08 AM PDT           38.00            510         -              Normal
  10/26/2026 09 AM PDT           37.99            507         -              Normal
  10/26/2026 10 AM PDT           37.97            500         -              Normal
  10/26/2026 11 AM PDT           37.96            497         -              Normal
  10/26/2026 12 PM PDT           37.95            494         -              Normal
  10/26/2026 01 PM PDT           37.94            491         -              Normal
  10/26/2026 02 PM PDT           37.93            488         -              Normal
  10/26/2026 03 PM PDT           37.91            481         -              Normal
  10/26/2026 04 PM PDT           37.87            469         -              Normal
  10/26/2026 05 PM PDT           37.83            457         -              Normal
  10/26/2026 06 PM PDT           37.78            441         -              Normal
  10/26/2026 07 PM PDT           37.72            423         -              Normal
  10/26/2026 08 PM PDT           37.66            405         -              Normal
  10/26/2026 09 PM PDT           37.62            393         -              Normal
  10/26/2026 10 PM PDT           37.57            378         -              Normal
  10/26/2026 11 PM PDT           37.53            367         -              Normal
  10/27/2026 12 AM PDT           37.50            358         -              Normal
  10/27/2026 01 AM PDT           37.47            349         -              Normal
  10/27/2026 02 AM PDT           37.44            341         -              Normal
  10/27/2026 03 AM PDT           37.41            332         -              Normal
  10/27/2026 04 AM PDT           37.39            327         -              Normal
  10/27/2026 05 AM PDT           37.37            321         -              Normal
  10/27/2026 06 AM PDT           37.35            315         -              Normal
  10/27/2026 07 AM PDT           37.33            310         -              Normal
  10/27/2026 08 AM PDT           37.32            307         -              Normal
  10/27/2026 09 AM PDT           37.30            302         -              Normal
  10/27/2026 10 AM PDT           37.29            299         -              Normal
  10/27/2026 11 AM PDT           37.28            296         -              Normal
  10/27/2026 12 PM PDT           37.27            293         -              Normal
  10/27/2026 01 PM PDT           37.26            291         -              Normal
  10/27/2026 02 PM PDT           37.25            288         -              Normal
  10/27/2026 03 PM PDT           37.25            288         0              Normal
  10/27/2026 04 PM PDT           37.24            285         -              Normal
  10/27/2026 05 PM PDT           37.23            283         -              Normal
  10/27/2026 06 PM PDT           37.23            283         0              Normal
  10/27/2026 07 PM PDT           37.22            280         -              Normal
  10/27/2026 08 PM PDT           37.22            280         0              Normal
  10/27/2026 09 PM PDT           37.22            280         0              Normal
  10/27/2026 10 PM PDT           37.21            277         -              Normal
  10/27/2026 11 PM PDT           37.21            277         0              Normal
  10/28/2026 12 AM PDT           37.20            275         -              Normal
  10/28/2026 01 AM PDT           37.20            275         0              Normal
  10/28/2026 02 AM PDT           37.20            275         0              Normal
  10/28/2026 03 AM PDT           37.20            275         0              Normal
  10/28/2026 04 AM PDT           37.20            275         0              Normal
  10/28/2026 05 AM PDT           37.20            275         0              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.