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 20 2026 at 7:29 AM PDTNext Issuance: Oct 21 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:  10/20/2026 at 07:29 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:                       40.41 Feet
# Maximum Forecast Flow:                        1361 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/15/2026 07 AM PDT           36.99            220                        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
  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
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/20/2026 08 AM PDT           39.19            920                        Normal
  10/20/2026 09 AM PDT           39.15            906         -              Normal
  10/20/2026 10 AM PDT           39.12            896         -              Normal
  10/20/2026 11 AM PDT           39.10            889         -              Normal
  10/20/2026 12 PM PDT           39.08            882         -              Normal
  10/20/2026 01 PM PDT           39.05            872         -              Normal
  10/20/2026 02 PM PDT           39.03            866         -              Normal
  10/20/2026 03 PM PDT           39.00            856         -              Normal
  10/20/2026 04 PM PDT           38.95            837         -              Normal
  10/20/2026 05 PM PDT           38.89            815         -              Normal
  10/20/2026 06 PM PDT           38.82            790         -              Normal
  10/20/2026 07 PM PDT           38.74            761         -              Normal
  10/20/2026 08 PM PDT           38.67            736         -              Normal
  10/20/2026 09 PM PDT           38.60            711         -              Normal
  10/20/2026 10 PM PDT           38.54            690         -              Normal
  10/20/2026 11 PM PDT           38.48            670         -              Normal
  10/21/2026 12 AM PDT           38.43            652         -              Normal
  10/21/2026 01 AM PDT           38.38            635         -              Normal
  10/21/2026 02 AM PDT           38.34            622         -              Normal
  10/21/2026 03 AM PDT           38.31            612         -              Normal
  10/21/2026 04 AM PDT           38.27            598         -              Normal
  10/21/2026 05 AM PDT           38.24            588         -              Normal
  10/21/2026 06 AM PDT           38.21            578         -              Normal
  10/21/2026 07 AM PDT           38.19            572         -              Normal
  10/21/2026 08 AM PDT           38.16            562         -              Normal
  10/21/2026 09 AM PDT           38.14            555         -              Normal
  10/21/2026 10 AM PDT           38.12            549         -              Normal
  10/21/2026 11 AM PDT           38.11            545         -              Normal
  10/21/2026 12 PM PDT           38.09            539         -              Normal
  10/21/2026 01 PM PDT           38.08            536         -              Normal
  10/21/2026 02 PM PDT           38.07            532         -              Normal
  10/21/2026 03 PM PDT           38.05            526         -              Normal
  10/21/2026 04 PM PDT           38.04            523         -              Normal
  10/21/2026 05 PM PDT           38.03            520         -              Normal
  10/21/2026 06 PM PDT           38.06            529         +              Normal
  10/21/2026 07 PM PDT           38.13            552         +              Normal
  10/21/2026 08 PM PDT           38.19            572         +              Normal
  10/21/2026 09 PM PDT           38.25            592         +              Normal
  10/21/2026 10 PM PDT           38.30            608         +              Normal
  10/21/2026 11 PM PDT           38.34            622         +              Normal
  10/22/2026 12 AM PDT           38.38            635         +              Normal
  10/22/2026 01 AM PDT           38.42            649         +              Normal
  10/22/2026 02 AM PDT           38.45            659         +              Normal
  10/22/2026 03 AM PDT           38.48            670         +              Normal
  10/22/2026 04 AM PDT           38.50            676         +              Normal
  10/22/2026 05 AM PDT           38.52            683         +              Normal
  10/22/2026 06 AM PDT           38.54            690         +              Normal
  10/22/2026 07 AM PDT           38.56            697         +              Normal
  10/22/2026 08 AM PDT           38.57            701         +              Normal
  10/22/2026 09 AM PDT           38.59            708         +              Normal
  10/22/2026 10 AM PDT           38.60            711         +              Normal
  10/22/2026 11 AM PDT           38.61            715         +              Normal
  10/22/2026 12 PM PDT           38.62            718         +              Normal
  10/22/2026 01 PM PDT           38.62            718         0              Normal
  10/22/2026 02 PM PDT           38.63            722         +              Normal
  10/22/2026 03 PM PDT           38.67            736         +              Normal
  10/22/2026 04 PM PDT           38.76            768         +              Normal
  10/22/2026 05 PM PDT           38.88            812         +              Normal
  10/22/2026 06 PM PDT           38.98            848         +              Normal
  10/22/2026 07 PM PDT           39.07            879         +              Normal
  10/22/2026 08 PM PDT           39.16            909         +              Normal
  10/22/2026 09 PM PDT           39.24            937         +              Normal
  10/22/2026 10 PM PDT           39.30            957         +              Normal
  10/22/2026 11 PM PDT           39.37            982         +              Normal
  10/23/2026 12 AM PDT           39.42            999         +              Normal
  10/23/2026 01 AM PDT           39.47           1016         +              Normal
  10/23/2026 02 AM PDT           39.51           1030         +              Normal
  10/23/2026 03 AM PDT           39.55           1045         +              Normal
  10/23/2026 04 AM PDT           39.58           1055         +              Normal
  10/23/2026 05 AM PDT           39.61           1066         +              Normal
  10/23/2026 06 AM PDT           39.63           1073         +              Normal
  10/23/2026 07 AM PDT           39.66           1084         +              Normal
  10/23/2026 08 AM PDT           39.68           1091         +              Normal
  10/23/2026 09 AM PDT           39.70           1098         +              Normal
  10/23/2026 10 AM PDT           39.71           1102         +              Normal
  10/23/2026 11 AM PDT           39.73           1109         +              Normal
  10/23/2026 12 PM PDT           39.74           1112         +              Normal
  10/23/2026 01 PM PDT           39.75           1116         +              Normal
  10/23/2026 02 PM PDT           39.79           1130         +              Normal
  10/23/2026 03 PM PDT           39.84           1148         +              Normal
  10/23/2026 04 PM PDT           39.88           1163         +              Normal
  10/23/2026 05 PM PDT           39.92           1178         +              Normal
  10/23/2026 06 PM PDT           39.95           1189         +              Normal
  10/23/2026 07 PM PDT           39.98           1200         +              Normal
  10/23/2026 08 PM PDT           40.01           1211         +              Normal
  10/23/2026 09 PM PDT           40.07           1233         +              Normal
  10/23/2026 10 PM PDT           40.15           1263         +              Normal
  10/23/2026 11 PM PDT           40.23           1293         +              Normal
  10/24/2026 12 AM PDT           40.29           1315         +              Normal
  10/24/2026 01 AM PDT           40.35           1338         +              Normal
  10/24/2026 02 AM PDT           40.40           1357         +              Normal
  10/24/2026 03 AM PDT           40.41           1361         +              Normal
  10/24/2026 04 AM PDT           40.39           1353         -              Normal
  10/24/2026 05 AM PDT           40.38           1349         -              Normal
  10/24/2026 06 AM PDT           40.36           1342         -              Normal
  10/24/2026 07 AM PDT           40.34           1334         -              Normal
  10/24/2026 08 AM PDT           40.33           1330         -              Normal
  10/24/2026 09 AM PDT           40.32           1326         -              Normal
  10/24/2026 10 AM PDT           40.31           1323         -              Normal
  10/24/2026 11 AM PDT           40.30           1319         -              Normal
  10/24/2026 12 PM PDT           40.27           1308         -              Normal
  10/24/2026 01 PM PDT           40.23           1293         -              Normal
  10/24/2026 02 PM PDT           40.17           1270         -              Normal
  10/24/2026 03 PM PDT           40.10           1244         -              Normal
  10/24/2026 04 PM PDT           40.04           1222         -              Normal
  10/24/2026 05 PM PDT           39.97           1196         -              Normal
  10/24/2026 06 PM PDT           39.91           1174         -              Normal
  10/24/2026 07 PM PDT           39.85           1152         -              Normal
  10/24/2026 08 PM PDT           39.80           1134         -              Normal
  10/24/2026 09 PM PDT           39.76           1120         -              Normal
  10/24/2026 10 PM PDT           39.72           1105         -              Normal
  10/24/2026 11 PM PDT           39.68           1091         -              Normal
  10/25/2026 12 AM PDT           39.64           1077         -              Normal
  10/25/2026 01 AM PDT           39.61           1066         -              Normal
  10/25/2026 02 AM PDT           39.59           1059         -              Normal
  10/25/2026 03 AM PDT           39.56           1048         -              Normal
  10/25/2026 04 AM PDT           39.54           1041         -              Normal
  10/25/2026 05 AM PDT           39.52           1034         -              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.