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 22 2026 at 8:13 AM PDTNext Issuance: Oct 23 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:  10/22/2026 at 08:13 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:                       39.88 Feet
# Maximum Forecast Flow:                        1163 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  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           37.76            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           37.81            450         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/22/2026 08 AM PDT           37.83            457                        Normal
  10/22/2026 09 AM PDT           37.85            463         +              Normal
  10/22/2026 10 AM PDT           37.87            469         +              Normal
  10/22/2026 11 AM PDT           37.88            472         +              Normal
  10/22/2026 12 PM PDT           37.89            475         +              Normal
  10/22/2026 01 PM PDT           37.89            475         0              Normal
  10/22/2026 02 PM PDT           37.90            478         +              Normal
  10/22/2026 03 PM PDT           37.92            485         +              Normal
  10/22/2026 04 PM PDT           38.02            516         +              Normal
  10/22/2026 05 PM PDT           38.16            562         +              Normal
  10/22/2026 06 PM PDT           38.28            602         +              Normal
  10/22/2026 07 PM PDT           38.40            642         +              Normal
  10/22/2026 08 PM PDT           38.49            673         +              Normal
  10/22/2026 09 PM PDT           38.58            704         +              Normal
  10/22/2026 10 PM PDT           38.65            729         +              Normal
  10/22/2026 11 PM PDT           38.71            750         +              Normal
  10/23/2026 12 AM PDT           38.77            772         +              Normal
  10/23/2026 01 AM PDT           38.82            790         +              Normal
  10/23/2026 02 AM PDT           38.86            804         +              Normal
  10/23/2026 03 AM PDT           38.90            819         +              Normal
  10/23/2026 04 AM PDT           38.94            833         +              Normal
  10/23/2026 05 AM PDT           38.98            848         +              Normal
  10/23/2026 06 AM PDT           39.01            859         +              Normal
  10/23/2026 07 AM PDT           39.04            869         +              Normal
  10/23/2026 08 AM PDT           39.07            879         +              Normal
  10/23/2026 09 AM PDT           39.10            889         +              Normal
  10/23/2026 10 AM PDT           39.12            896         +              Normal
  10/23/2026 11 AM PDT           39.15            906         +              Normal
  10/23/2026 12 PM PDT           39.16            909         +              Normal
  10/23/2026 01 PM PDT           39.18            916         +              Normal
  10/23/2026 02 PM PDT           39.22            930         +              Normal
  10/23/2026 03 PM PDT           39.27            947         +              Normal
  10/23/2026 04 PM PDT           39.32            964         +              Normal
  10/23/2026 05 PM PDT           39.36            978         +              Normal
  10/23/2026 06 PM PDT           39.40            992         +              Normal
  10/23/2026 07 PM PDT           39.43           1002         +              Normal
  10/23/2026 08 PM PDT           39.45           1009         +              Normal
  10/23/2026 09 PM PDT           39.51           1030         +              Normal
  10/23/2026 10 PM PDT           39.60           1062         +              Normal
  10/23/2026 11 PM PDT           39.68           1091         +              Normal
  10/24/2026 12 AM PDT           39.75           1116         +              Normal
  10/24/2026 01 AM PDT           39.81           1138         +              Normal
  10/24/2026 02 AM PDT           39.87           1159         +              Normal
  10/24/2026 03 AM PDT           39.88           1163         +              Normal
  10/24/2026 04 AM PDT           39.86           1156         -              Normal
  10/24/2026 05 AM PDT           39.84           1148         -              Normal
  10/24/2026 06 AM PDT           39.82           1141         -              Normal
  10/24/2026 07 AM PDT           39.81           1138         -              Normal
  10/24/2026 08 AM PDT           39.79           1130         -              Normal
  10/24/2026 09 AM PDT           39.78           1127         -              Normal
  10/24/2026 10 AM PDT           39.76           1120         -              Normal
  10/24/2026 11 AM PDT           39.75           1116         -              Normal
  10/24/2026 12 PM PDT           39.73           1109         -              Normal
  10/24/2026 01 PM PDT           39.68           1091         -              Normal
  10/24/2026 02 PM PDT           39.61           1066         -              Normal
  10/24/2026 03 PM PDT           39.54           1041         -              Normal
  10/24/2026 04 PM PDT           39.47           1016         -              Normal
  10/24/2026 05 PM PDT           39.40            992         -              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           39.05            872         -              Normal
  10/25/2026 01 AM PDT           39.02            862         -              Normal
  10/25/2026 02 AM PDT           38.99            852         -              Normal
  10/25/2026 03 AM PDT           38.97            845         -              Normal
  10/25/2026 04 AM PDT           38.95            837         -              Normal
  10/25/2026 05 AM PDT           38.93            830         -              Normal
  10/25/2026 06 AM PDT           38.91            822         -              Normal
  10/25/2026 07 AM PDT           38.90            819         -              Normal
  10/25/2026 08 AM PDT           38.89            815         -              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           38.85            801         -              Normal
  10/25/2026 12 PM PDT           38.85            801         0              Normal
  10/25/2026 01 PM PDT           38.83            793         -              Normal
  10/25/2026 02 PM PDT           38.80            782         -              Normal
  10/25/2026 03 PM PDT           38.75            765         -              Normal
  10/25/2026 04 PM PDT           38.69            743         -              Normal
  10/25/2026 05 PM PDT           38.62            718         -              Normal
  10/25/2026 06 PM PDT           38.55            694         -              Normal
  10/25/2026 07 PM PDT           38.48            670         -              Normal
  10/25/2026 08 PM PDT           38.41            645         -              Normal
  10/25/2026 09 PM PDT           38.35            625         -              Normal
  10/25/2026 10 PM PDT           38.30            608         -              Normal
  10/25/2026 11 PM PDT           38.25            592         -              Normal
  10/26/2026 12 AM PDT           38.21            578         -              Normal
  10/26/2026 01 AM PDT           38.17            565         -              Normal
  10/26/2026 02 AM PDT           38.14            555         -              Normal
  10/26/2026 03 AM PDT           38.11            545         -              Normal
  10/26/2026 04 AM PDT           38.08            536         -              Normal
  10/26/2026 05 AM PDT           38.05            526         -              Normal
  10/26/2026 06 AM PDT           38.03            520         -              Normal
  10/26/2026 07 AM PDT           38.01            513         -              Normal
  10/26/2026 08 AM PDT           37.99            507         -              Normal
  10/26/2026 09 AM PDT           37.97            500         -              Normal
  10/26/2026 10 AM PDT           37.96            497         -              Normal
  10/26/2026 11 AM PDT           37.95            494         -              Normal
  10/26/2026 12 PM PDT           37.93            488         -              Normal
  10/26/2026 01 PM PDT           37.92            485         -              Normal
  10/26/2026 02 PM PDT           37.91            481         -              Normal
  10/26/2026 03 PM PDT           37.89            475         -              Normal
  10/26/2026 04 PM PDT           37.86            466         -              Normal
  10/26/2026 05 PM PDT           37.82            453         -              Normal
  10/26/2026 06 PM PDT           37.76            435         -              Normal
  10/26/2026 07 PM PDT           37.70            417         -              Normal
  10/26/2026 08 PM PDT           37.65            402         -              Normal
  10/26/2026 09 PM PDT           37.60            387         -              Normal
  10/26/2026 10 PM PDT           37.56            375         -              Normal
  10/26/2026 11 PM PDT           37.52            364         -              Normal
  10/27/2026 12 AM PDT           37.48            352         -              Normal
  10/27/2026 01 AM PDT           37.45            344         -              Normal
  10/27/2026 02 AM PDT           37.42            335         -              Normal
  10/27/2026 03 AM PDT           37.40            329         -              Normal
  10/27/2026 04 AM PDT           37.37            321         -              Normal
  10/27/2026 05 AM PDT           37.35            315         -              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.