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 26 2026 at 6:59 AM PDTNext Issuance: Oct 27 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:  10/26/2026 at 06:59 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/24/2026 at 10:00 AM PDT
# Maximum Observed Stage:                       39.86 Feet
# Maximum Observed Flow:                        1156 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/26/2026 at 07:00 AM PDT
# Maximum Forecast Stage:                       38.38 Feet
# Maximum Forecast Flow:                        635 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  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           39.01            859         +              Normal
  10/23/2026 07 AM PDT           39.06            876         +              Normal
  10/23/2026 08 AM PDT           39.08            882         +              Normal
  10/23/2026 09 AM PDT           39.12            896         +              Normal
  10/23/2026 10 AM PDT           39.14            903         +              Normal
  10/23/2026 11 AM PDT           39.17            913         +              Normal
  10/23/2026 12 PM PDT           39.20            923         +              Normal
  10/23/2026 01 PM PDT           39.24            937         +              Normal
  10/23/2026 02 PM PDT           39.26            944         +              Normal
  10/23/2026 03 PM PDT           39.31            961         +              Normal
  10/23/2026 04 PM PDT           39.33            968         +              Normal
  10/23/2026 05 PM PDT           39.35            975         +              Normal
  10/23/2026 06 PM PDT           39.37            982         +              Normal
  10/23/2026 07 PM PDT           39.38            985         +              Normal
  10/23/2026 08 PM PDT           39.42            999         +              Normal
  10/23/2026 09 PM PDT           39.44           1006         +              Normal
  10/23/2026 10 PM PDT           39.48           1020         +              Normal
  10/23/2026 11 PM PDT           39.52           1034         +              Normal
  10/24/2026 12 AM PDT           39.56           1048         +              Normal
  10/24/2026 01 AM PDT           39.61           1066         +              Normal
  10/24/2026 02 AM PDT           39.68           1091         +              Normal
  10/24/2026 03 AM PDT           39.72           1105         +              Normal
  10/24/2026 04 AM PDT           39.78           1127         +              Normal
  10/24/2026 05 AM PDT           39.80           1134         +              Normal
  10/24/2026 06 AM PDT           39.82           1141         +              Normal
  10/24/2026 07 AM PDT           39.84           1148         +              Normal
  10/24/2026 08 AM PDT           39.86           1156         +              Normal
  10/24/2026 09 AM PDT           39.85           1152         -              Normal
  10/24/2026 10 AM PDT           39.86           1156         +              Normal
  10/24/2026 11 AM PDT           39.85           1152         -              Normal
  10/24/2026 12 PM PDT           39.84           1148         -              Normal
  10/24/2026 01 PM PDT           39.82           1141         -              Normal
  10/24/2026 02 PM PDT           39.82           1141         0              Normal
  10/24/2026 03 PM PDT           39.79           1130         -              Normal
  10/24/2026 04 PM PDT           39.76           1120         -              Normal
  10/24/2026 05 PM PDT           39.72           1105         -              Normal
  10/24/2026 06 PM PDT           39.67           1087         -              Normal
  10/24/2026 07 PM PDT           39.61           1066         -              Normal
  10/24/2026 08 PM PDT           39.58           1055         -              Normal
  10/24/2026 09 PM PDT           39.53           1038         -              Normal
  10/24/2026 10 PM PDT           39.48           1020         -              Normal
  10/24/2026 11 PM PDT           39.43           1002         -              Normal
  10/25/2026 12 AM PDT           39.40            992         -              Normal
  10/25/2026 01 AM PDT           39.36            978         -              Normal
  10/25/2026 02 AM PDT           39.33            968         -              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           39.22            930         -              Normal
  10/25/2026 07 AM PDT           39.19            920         -              Normal
  10/25/2026 08 AM PDT           39.18            916         -              Normal
  10/25/2026 09 AM PDT           39.16            909         -              Normal
  10/25/2026 10 AM PDT           39.14            903         -              Normal
  10/25/2026 11 AM PDT           39.12            896         -              Normal
  10/25/2026 12 PM PDT           39.13            899         +              Normal
  10/25/2026 01 PM PDT           39.12            896         -              Normal
  10/25/2026 02 PM PDT           39.10            889         -              Normal
  10/25/2026 03 PM PDT           39.08            882         -              Normal
  10/25/2026 04 PM PDT           39.05            872         -              Normal
  10/25/2026 05 PM PDT           39.02            862         -              Normal
  10/25/2026 06 PM PDT           38.98            848         -              Normal
  10/25/2026 07 PM PDT           38.93            830         -              Normal
  10/25/2026 08 PM PDT           38.88            812         -              Normal
  10/25/2026 09 PM PDT           38.83            793         -              Normal
  10/25/2026 10 PM PDT           38.75            765         -              Normal
  10/25/2026 11 PM PDT           38.70            747         -              Normal
  10/26/2026 12 AM PDT           38.65            729         -              Normal
  10/26/2026 01 AM PDT           38.60            711         -              Normal
  10/26/2026 02 AM PDT           38.55            694         -              Normal
  10/26/2026 03 AM PDT           38.50            676         -              Normal
  10/26/2026 04 AM PDT           38.46            663         -              Normal
  10/26/2026 05 AM PDT           38.43            652         -              Normal
  10/26/2026 06 AM PDT           38.41            645         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/26/2026 07 AM PDT           38.38            635                        Normal
  10/26/2026 08 AM PDT           38.36            628         -              Normal
  10/26/2026 09 AM PDT           38.34            622         -              Normal
  10/26/2026 10 AM PDT           38.33            618         -              Normal
  10/26/2026 11 AM PDT           38.32            615         -              Normal
  10/26/2026 12 PM PDT           38.30            608         -              Normal
  10/26/2026 01 PM PDT           38.29            605         -              Normal
  10/26/2026 02 PM PDT           38.28            602         -              Normal
  10/26/2026 03 PM PDT           38.27            598         -              Normal
  10/26/2026 04 PM PDT           38.24            588         -              Normal
  10/26/2026 05 PM PDT           38.20            575         -              Normal
  10/26/2026 06 PM PDT           38.15            558         -              Normal
  10/26/2026 07 PM PDT           38.09            539         -              Normal
  10/26/2026 08 PM PDT           38.04            523         -              Normal
  10/26/2026 09 PM PDT           37.99            507         -              Normal
  10/26/2026 10 PM PDT           37.95            494         -              Normal
  10/26/2026 11 PM PDT           37.91            481         -              Normal
  10/27/2026 12 AM PDT           37.87            469         -              Normal
  10/27/2026 01 AM PDT           37.84            460         -              Normal
  10/27/2026 02 AM PDT           37.81            450         -              Normal
  10/27/2026 03 AM PDT           37.78            441         -              Normal
  10/27/2026 04 AM PDT           37.76            435         -              Normal
  10/27/2026 05 AM PDT           37.73            426         -              Normal
  10/27/2026 06 AM PDT           37.71            420         -              Normal
  10/27/2026 07 AM PDT           37.70            417         -              Normal
  10/27/2026 08 AM PDT           37.68            411         -              Normal
  10/27/2026 09 AM PDT           37.67            408         -              Normal
  10/27/2026 10 AM PDT           37.65            402         -              Normal
  10/27/2026 11 AM PDT           37.64            399         -              Normal
  10/27/2026 12 PM PDT           37.63            396         -              Normal
  10/27/2026 01 PM PDT           37.62            393         -              Normal
  10/27/2026 02 PM PDT           37.61            390         -              Normal
  10/27/2026 03 PM PDT           37.60            387         -              Normal
  10/27/2026 04 PM PDT           37.60            387         0              Normal
  10/27/2026 05 PM PDT           37.59            384         -              Normal
  10/27/2026 06 PM PDT           37.58            381         -              Normal
  10/27/2026 07 PM PDT           37.58            381         0              Normal
  10/27/2026 08 PM PDT           37.57            378         -              Normal
  10/27/2026 09 PM PDT           37.57            378         0              Normal
  10/27/2026 10 PM PDT           37.56            375         -              Normal
  10/27/2026 11 PM PDT           37.56            375         0              Normal
  10/28/2026 12 AM PDT           37.56            375         0              Normal
  10/28/2026 01 AM PDT           37.55            372         -              Normal
  10/28/2026 02 AM PDT           37.55            372         0              Normal
  10/28/2026 03 AM PDT           37.55            372         0              Normal
  10/28/2026 04 AM PDT           37.54            370         -              Normal
  10/28/2026 05 AM PDT           37.54            370         0              Normal
  10/28/2026 06 AM PDT           37.54            370         0              Normal
  10/28/2026 07 AM PDT           37.54            370         0              Normal
  10/28/2026 08 AM PDT           37.53            367         -              Normal
  10/28/2026 09 AM PDT           37.53            367         0              Normal
  10/28/2026 10 AM PDT           37.53            367         0              Normal
  10/28/2026 11 AM PDT           37.53            367         0              Normal
  10/28/2026 12 PM PDT           37.53            367         0              Normal
  10/28/2026 01 PM PDT           37.53            367         0              Normal
  10/28/2026 02 PM PDT           37.52            364         -              Normal
  10/28/2026 03 PM PDT           37.52            364         0              Normal
  10/28/2026 04 PM PDT           37.52            364         0              Normal
  10/28/2026 05 PM PDT           37.52            364         0              Normal
  10/28/2026 06 PM PDT           37.52            364         0              Normal
  10/28/2026 07 PM PDT           37.52            364         0              Normal
  10/28/2026 08 PM PDT           37.52            364         0              Normal
  10/28/2026 09 PM PDT           37.51            361         -              Normal
  10/28/2026 10 PM PDT           37.51            361         0              Normal
  10/28/2026 11 PM PDT           37.51            361         0              Normal
  10/29/2026 12 AM PDT           37.51            361         0              Normal
  10/29/2026 01 AM PDT           37.51            361         0              Normal
  10/29/2026 02 AM PDT           37.51            361         0              Normal
  10/29/2026 03 AM PDT           37.51            361         0              Normal
  10/29/2026 04 AM PDT           37.51            361         0              Normal
  10/29/2026 05 AM PDT           37.50            358         -              Normal
  10/29/2026 06 AM PDT           37.50            358         0              Normal
  10/29/2026 07 AM PDT           37.50            358         0              Normal
  10/29/2026 08 AM PDT           37.50            358         0              Normal
  10/29/2026 09 AM PDT           37.50            358         0              Normal
  10/29/2026 10 AM PDT           37.50            358         0              Normal
  10/29/2026 11 AM PDT           37.50            358         0              Normal
  10/29/2026 12 PM PDT           37.50            358         0              Normal
  10/29/2026 01 PM PDT           37.50            358         0              Normal
  10/29/2026 02 PM PDT           37.49            355         -              Normal
  10/29/2026 03 PM PDT           37.49            355         0              Normal
  10/29/2026 04 PM PDT           37.49            355         0              Normal
  10/29/2026 05 PM PDT           37.49            355         0              Normal
  10/29/2026 06 PM PDT           37.49            355         0              Normal
  10/29/2026 07 PM PDT           37.49            355         0              Normal
  10/29/2026 08 PM PDT           37.49            355         0              Normal
  10/29/2026 09 PM PDT           37.49            355         0              Normal
  10/29/2026 10 PM PDT           37.49            355         0              Normal
  10/29/2026 11 PM PDT           37.48            352         -              Normal
  10/30/2026 12 AM PDT           37.48            352         0              Normal
  10/30/2026 01 AM PDT           37.48            352         0              Normal
  10/30/2026 02 AM PDT           37.48            352         0              Normal
  10/30/2026 03 AM PDT           37.48            352         0              Normal
  10/30/2026 04 AM PDT           37.48            352         0              Normal
  10/30/2026 05 AM PDT           37.48            352         0              Normal
  10/30/2026 06 AM PDT           37.48            352         0              Normal
  10/30/2026 07 AM PDT           37.48            352         0              Normal
  10/30/2026 08 AM PDT           37.48            352         0              Normal
  10/30/2026 09 AM PDT           37.47            349         -              Normal
  10/30/2026 10 AM PDT           37.47            349         0              Normal
  10/30/2026 11 AM PDT           37.47            349         0              Normal
  10/30/2026 12 PM PDT           37.47            349         0              Normal
  10/30/2026 01 PM PDT           37.47            349         0              Normal
  10/30/2026 02 PM PDT           37.47            349         0              Normal
  10/30/2026 03 PM PDT           37.47            349         0              Normal
  10/30/2026 04 PM PDT           37.47            349         0              Normal
  10/30/2026 05 PM PDT           37.47            349         0              Normal
  10/30/2026 06 PM PDT           37.47            349         0              Normal
  10/30/2026 07 PM PDT           37.46            346         -              Normal
  10/30/2026 08 PM PDT           37.46            346         0              Normal
  10/30/2026 09 PM PDT           37.46            346         0              Normal
  10/30/2026 10 PM PDT           37.46            346         0              Normal
  10/30/2026 11 PM PDT           37.46            346         0              Normal
  10/31/2026 12 AM PDT           37.46            346         0              Normal
  10/31/2026 01 AM PDT           37.46            346         0              Normal
  10/31/2026 02 AM PDT           37.46            346         0              Normal
  10/31/2026 03 AM PDT           37.45            344         -              Normal
  10/31/2026 04 AM PDT           37.45            344         0              Normal
  10/31/2026 05 AM PDT           37.45            344         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.