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 19 2026 at 6:52 AM PDTNext Issuance: Oct 20 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:  10/19/2026 at 06:52 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:     10/19/2026 at 07:00 AM PDT
# Maximum Forecast Stage:                       40.65 Feet
# Maximum Forecast Flow:                        1453 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/14/2026 06 AM PDT           37.01            225                        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           41.37           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
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/19/2026 07 AM PDT           40.65           1453                        Normal
  10/19/2026 08 AM PDT           40.63           1445         -              Normal
  10/19/2026 09 AM PDT           40.61           1437         -              Normal
  10/19/2026 10 AM PDT           40.59           1430         -              Normal
  10/19/2026 11 AM PDT           40.58           1426         -              Normal
  10/19/2026 12 PM PDT           40.55           1414         -              Normal
  10/19/2026 01 PM PDT           40.48           1387         -              Normal
  10/19/2026 02 PM PDT           40.39           1353         -              Normal
  10/19/2026 03 PM PDT           40.29           1315         -              Normal
  10/19/2026 04 PM PDT           40.17           1270         -              Normal
  10/19/2026 05 PM PDT           40.05           1225         -              Normal
  10/19/2026 06 PM PDT           39.91           1174         -              Normal
  10/19/2026 07 PM PDT           39.78           1127         -              Normal
  10/19/2026 08 PM PDT           39.66           1084         -              Normal
  10/19/2026 09 PM PDT           39.56           1048         -              Normal
  10/19/2026 10 PM PDT           39.46           1013         -              Normal
  10/19/2026 11 PM PDT           39.37            982         -              Normal
  10/20/2026 12 AM PDT           39.29            954         -              Normal
  10/20/2026 01 AM PDT           39.22            930         -              Normal
  10/20/2026 02 AM PDT           39.16            909         -              Normal
  10/20/2026 03 AM PDT           39.10            889         -              Normal
  10/20/2026 04 AM PDT           39.05            872         -              Normal
  10/20/2026 05 AM PDT           39.00            856         -              Normal
  10/20/2026 06 AM PDT           38.96            841         -              Normal
  10/20/2026 07 AM PDT           38.93            830         -              Normal
  10/20/2026 08 AM PDT           38.90            819         -              Normal
  10/20/2026 09 AM PDT           38.87            808         -              Normal
  10/20/2026 10 AM PDT           38.84            797         -              Normal
  10/20/2026 11 AM PDT           38.82            790         -              Normal
  10/20/2026 12 PM PDT           38.80            782         -              Normal
  10/20/2026 01 PM PDT           38.78            775         -              Normal
  10/20/2026 02 PM PDT           38.76            768         -              Normal
  10/20/2026 03 PM PDT           38.73            757         -              Normal
  10/20/2026 04 PM PDT           38.69            743         -              Normal
  10/20/2026 05 PM PDT           38.63            722         -              Normal
  10/20/2026 06 PM PDT           38.56            697         -              Normal
  10/20/2026 07 PM PDT           38.50            676         -              Normal
  10/20/2026 08 PM PDT           38.43            652         -              Normal
  10/20/2026 09 PM PDT           38.37            632         -              Normal
  10/20/2026 10 PM PDT           38.31            612         -              Normal
  10/20/2026 11 PM PDT           38.26            595         -              Normal
  10/21/2026 12 AM PDT           38.22            582         -              Normal
  10/21/2026 01 AM PDT           38.18            568         -              Normal
  10/21/2026 02 AM PDT           38.14            555         -              Normal
  10/21/2026 03 AM PDT           38.11            545         -              Normal
  10/21/2026 04 AM PDT           38.08            536         -              Normal
  10/21/2026 05 AM PDT           38.05            526         -              Normal
  10/21/2026 06 AM PDT           38.02            516         -              Normal
  10/21/2026 07 AM PDT           38.00            510         -              Normal
  10/21/2026 08 AM PDT           37.98            504         -              Normal
  10/21/2026 09 AM PDT           37.96            497         -              Normal
  10/21/2026 10 AM PDT           37.95            494         -              Normal
  10/21/2026 11 AM PDT           37.93            488         -              Normal
  10/21/2026 12 PM PDT           37.92            485         -              Normal
  10/21/2026 01 PM PDT           37.91            481         -              Normal
  10/21/2026 02 PM PDT           37.90            478         -              Normal
  10/21/2026 03 PM PDT           37.88            472         -              Normal
  10/21/2026 04 PM PDT           37.88            472         0              Normal
  10/21/2026 05 PM PDT           37.87            469         -              Normal
  10/21/2026 06 PM PDT           37.91            481         +              Normal
  10/21/2026 07 PM PDT           37.98            504         +              Normal
  10/21/2026 08 PM PDT           38.05            526         +              Normal
  10/21/2026 09 PM PDT           38.11            545         +              Normal
  10/21/2026 10 PM PDT           38.16            562         +              Normal
  10/21/2026 11 PM PDT           38.20            575         +              Normal
  10/22/2026 12 AM PDT           38.24            588         +              Normal
  10/22/2026 01 AM PDT           38.28            602         +              Normal
  10/22/2026 02 AM PDT           38.31            612         +              Normal
  10/22/2026 03 AM PDT           38.34            622         +              Normal
  10/22/2026 04 AM PDT           38.36            628         +              Normal
  10/22/2026 05 AM PDT           38.39            639         +              Normal
  10/22/2026 06 AM PDT           38.41            645         +              Normal
  10/22/2026 07 AM PDT           38.42            649         +              Normal
  10/22/2026 08 AM PDT           38.44            656         +              Normal
  10/22/2026 09 AM PDT           38.45            659         +              Normal
  10/22/2026 10 AM PDT           38.47            666         +              Normal
  10/22/2026 11 AM PDT           38.48            670         +              Normal
  10/22/2026 12 PM PDT           38.49            673         +              Normal
  10/22/2026 01 PM PDT           38.49            673         0              Normal
  10/22/2026 02 PM PDT           38.51            680         +              Normal
  10/22/2026 03 PM PDT           38.56            697         +              Normal
  10/22/2026 04 PM PDT           38.65            729         +              Normal
  10/22/2026 05 PM PDT           38.77            772         +              Normal
  10/22/2026 06 PM PDT           38.87            808         +              Normal
  10/22/2026 07 PM PDT           38.96            841         +              Normal
  10/22/2026 08 PM PDT           39.04            869         +              Normal
  10/22/2026 09 PM PDT           39.12            896         +              Normal
  10/22/2026 10 PM PDT           39.19            920         +              Normal
  10/22/2026 11 PM PDT           39.25            940         +              Normal
  10/23/2026 12 AM PDT           39.31            961         +              Normal
  10/23/2026 01 AM PDT           39.36            978         +              Normal
  10/23/2026 02 AM PDT           39.40            992         +              Normal
  10/23/2026 03 AM PDT           39.44           1006         +              Normal
  10/23/2026 04 AM PDT           39.47           1016         +              Normal
  10/23/2026 05 AM PDT           39.50           1027         +              Normal
  10/23/2026 06 AM PDT           39.53           1038         +              Normal
  10/23/2026 07 AM PDT           39.55           1045         +              Normal
  10/23/2026 08 AM PDT           39.57           1052         +              Normal
  10/23/2026 09 AM PDT           39.59           1059         +              Normal
  10/23/2026 10 AM PDT           39.61           1066         +              Normal
  10/23/2026 11 AM PDT           39.62           1069         +              Normal
  10/23/2026 12 PM PDT           39.63           1073         +              Normal
  10/23/2026 01 PM PDT           39.65           1080         +              Normal
  10/23/2026 02 PM PDT           39.69           1094         +              Normal
  10/23/2026 03 PM PDT           39.73           1109         +              Normal
  10/23/2026 04 PM PDT           39.78           1127         +              Normal
  10/23/2026 05 PM PDT           39.81           1138         +              Normal
  10/23/2026 06 PM PDT           39.85           1152         +              Normal
  10/23/2026 07 PM PDT           39.88           1163         +              Normal
  10/23/2026 08 PM PDT           39.91           1174         +              Normal
  10/23/2026 09 PM PDT           39.96           1192         +              Normal
  10/23/2026 10 PM PDT           40.05           1225         +              Normal
  10/23/2026 11 PM PDT           40.12           1251         +              Normal
  10/24/2026 12 AM PDT           40.19           1278         +              Normal
  10/24/2026 01 AM PDT           40.25           1300         +              Normal
  10/24/2026 02 AM PDT           40.30           1319         +              Normal
  10/24/2026 03 AM PDT           40.31           1323         +              Normal
  10/24/2026 04 AM PDT           40.29           1315         -              Normal
  10/24/2026 05 AM PDT           40.27           1308         -              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.