National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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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: Mar 19 2026 at 2:21 PM PDTNext Issuance: Mar 20 2026 at 9:00 AM PDT
Action/Monitor: 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:  03/19/2026 at 02:22 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/17/2026 at 10:00 PM PDT
# Maximum Observed Stage:                       44.61 Feet
# Maximum Observed Flow:                        3092 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/19/2026 at 03:00 PM PDT
# Maximum Forecast Stage:                       42.90 Feet
# Maximum Forecast Flow:                        2328 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/14/2026 02 PM PDT           44.56           3068                        Normal
  03/14/2026 03 PM PDT           44.57           3073         +              Normal
  03/14/2026 04 PM PDT           44.57           3073         0              Normal
  03/14/2026 05 PM PDT           44.57           3073         0              Normal
  03/14/2026 06 PM PDT           44.56           3068         -              Normal
  03/14/2026 07 PM PDT           44.54           3059         -              Normal
  03/14/2026 08 PM PDT           44.55           3063         +              Normal
  03/14/2026 09 PM PDT           44.54           3059         -              Normal
  03/14/2026 10 PM PDT           44.54           3059         0              Normal
  03/14/2026 11 PM PDT           44.54           3059         0              Normal
  03/15/2026 12 AM PDT           44.55           3063         +              Normal
  03/15/2026 01 AM PDT           44.54           3059         -              Normal
  03/15/2026 02 AM PDT           44.54           3059         0              Normal
  03/15/2026 03 AM PDT           44.54           3059         0              Normal
  03/15/2026 04 AM PDT           44.54           3059         0              Normal
  03/15/2026 05 AM PDT           44.54           3059         0              Normal
  03/15/2026 06 AM PDT           44.54           3059         0              Normal
  03/15/2026 07 AM PDT           44.53           3054         -              Normal
  03/15/2026 08 AM PDT           44.55           3063         +              Normal
  03/15/2026 09 AM PDT           44.54           3059         -              Normal
  03/15/2026 10 AM PDT           44.54           3059         0              Normal
  03/15/2026 11 AM PDT           44.54           3059         0              Normal
  03/15/2026 12 PM PDT           44.55           3063         +              Normal
  03/15/2026 01 PM PDT           44.55           3063         0              Normal
  03/15/2026 02 PM PDT           44.56           3068         +              Normal
  03/15/2026 03 PM PDT           44.54           3059         -              Normal
  03/15/2026 04 PM PDT           44.56           3068         +              Normal
  03/15/2026 05 PM PDT           44.56           3068         0              Normal
  03/15/2026 06 PM PDT           44.56           3068         0              Normal
  03/15/2026 07 PM PDT           44.56           3068         0              Normal
  03/15/2026 08 PM PDT           44.57           3073         +              Normal
  03/15/2026 09 PM PDT           44.56           3068         -              Normal
  03/15/2026 10 PM PDT           44.55           3063         -              Normal
  03/15/2026 11 PM PDT           44.56           3068         +              Normal
  03/16/2026 12 AM PDT           44.54           3059         -              Normal
  03/16/2026 01 AM PDT           44.55           3063         +              Normal
  03/16/2026 02 AM PDT           44.53           3054         -              Normal
  03/16/2026 03 AM PDT           44.53           3054         0              Normal
  03/16/2026 04 AM PDT           44.53           3054         0              Normal
  03/16/2026 05 AM PDT           44.52           3049         -              Normal
  03/16/2026 06 AM PDT           44.53           3054         +              Normal
  03/16/2026 07 AM PDT           44.52           3049         -              Normal
  03/16/2026 08 AM PDT           44.51           3045         -              Normal
  03/16/2026 09 AM PDT           44.51           3045         0              Normal
  03/16/2026 10 AM PDT           44.51           3045         0              Normal
  03/16/2026 11 AM PDT           44.51           3045         0              Normal
  03/16/2026 12 PM PDT           44.51           3045         0              Normal
  03/16/2026 01 PM PDT           44.51           3045         0              Normal
  03/16/2026 02 PM PDT           44.50           3040         -              Normal
  03/16/2026 03 PM PDT           44.51           3045         +              Normal
  03/16/2026 04 PM PDT           44.51           3045         0              Normal
  03/16/2026 05 PM PDT           44.52           3049         +              Normal
  03/16/2026 06 PM PDT           44.50           3040         -              Normal
  03/16/2026 07 PM PDT           44.51           3045         +              Normal
  03/16/2026 08 PM PDT           44.49           3035         -              Normal
  03/16/2026 09 PM PDT           44.50           3040         +              Normal
  03/16/2026 10 PM PDT           44.50           3040         0              Normal
  03/16/2026 11 PM PDT           44.50           3040         0              Normal
  03/17/2026 12 AM PDT           44.51           3045         +              Normal
  03/17/2026 01 AM PDT           44.52           3049         +              Normal
  03/17/2026 02 AM PDT           44.52           3049         0              Normal
  03/17/2026 03 AM PDT           44.52           3049         0              Normal
  03/17/2026 04 AM PDT           44.53           3054         +              Normal
  03/17/2026 05 AM PDT           44.53           3054         0              Normal
  03/17/2026 06 AM PDT           44.53           3054         0              Normal
  03/17/2026 07 AM PDT           44.54           3059         +              Normal
  03/17/2026 08 AM PDT           44.55           3063         +              Normal
  03/17/2026 09 AM PDT           44.55           3063         0              Normal
  03/17/2026 10 AM PDT           44.56           3068         +              Normal
  03/17/2026 11 AM PDT           44.56           3068         0              Normal
  03/17/2026 12 PM PDT           44.58           3078         +              Normal
  03/17/2026 01 PM PDT           44.60           3087         +              Normal
  03/17/2026 02 PM PDT           44.59           3082         -              Normal
  03/17/2026 03 PM PDT           44.58           3078         -              Normal
  03/17/2026 04 PM PDT           44.61           3092         +              Normal
  03/17/2026 05 PM PDT           44.59           3082         -              Normal
  03/17/2026 06 PM PDT           44.59           3082         0              Normal
  03/17/2026 07 PM PDT           44.60           3087         +              Normal
  03/17/2026 08 PM PDT           44.60           3087         0              Normal
  03/17/2026 09 PM PDT           44.58           3078         -              Normal
  03/17/2026 10 PM PDT           44.61           3092         +              Normal
  03/17/2026 11 PM PDT           44.59           3082         -              Normal
  03/18/2026 12 AM PDT           44.60           3087         +              Normal
  03/18/2026 01 AM PDT           44.60           3087         0              Normal
  03/18/2026 02 AM PDT           44.59           3082         -              Normal
  03/18/2026 03 AM PDT           44.58           3078         -              Normal
  03/18/2026 04 AM PDT           44.54           3059         -              Normal
  03/18/2026 05 AM PDT           44.51           3045         -              Normal
  03/18/2026 06 AM PDT           44.46           3021         -              Normal
  03/18/2026 07 AM PDT           44.40           2993         -              Normal
  03/18/2026 08 AM PDT           44.34           2966         -              Normal
  03/18/2026 09 AM PDT           44.27           2934         -              Normal
  03/18/2026 10 AM PDT           44.20           2902         -              Normal
  03/18/2026 11 AM PDT           44.12           2865         -              Normal
  03/18/2026 12 PM PDT           44.06           2838         -              Normal
  03/18/2026 01 PM PDT           44.00           2811         -              Normal
  03/18/2026 02 PM PDT           43.94           2784         -              Normal
  03/18/2026 03 PM PDT           43.89           2762         -              Normal
  03/18/2026 04 PM PDT           43.84           2739         -              Normal
  03/18/2026 05 PM PDT           43.80           2721         -              Normal
  03/18/2026 06 PM PDT           43.75           2699         -              Normal
  03/18/2026 07 PM PDT           43.71           2681         -              Normal
  03/18/2026 08 PM PDT           43.68           2668         -              Normal
  03/18/2026 09 PM PDT           43.65           2655         -              Normal
  03/18/2026 10 PM PDT           43.63           2646         -              Normal
  03/18/2026 11 PM PDT           43.58           2624         -              Normal
  03/19/2026 12 AM PDT           43.56           2615         -              Normal
  03/19/2026 01 AM PDT           43.51           2593         -              Normal
  03/19/2026 02 AM PDT           43.44           2562         -              Normal
  03/19/2026 03 AM PDT           43.37           2531         -              Normal
  03/19/2026 04 AM PDT           43.32           2509         -              Normal
  03/19/2026 05 AM PDT           43.27           2488         -              Normal
  03/19/2026 06 AM PDT           43.21           2462         -              Normal
  03/19/2026 07 AM PDT           43.15           2436         -              Normal
  03/19/2026 08 AM PDT           43.09           2410         -              Normal
  03/19/2026 09 AM PDT           43.06           2397         -              Normal
  03/19/2026 10 AM PDT           43.03           2384         -              Normal
  03/19/2026 11 AM PDT           42.99           2367         -              Normal
  03/19/2026 12 PM PDT           42.98           2362         -              Normal
  03/19/2026 01 PM PDT           42.95           2349         -              Normal
  03/19/2026 02 PM PDT           42.93           2341         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/19/2026 03 PM PDT           42.90           2328                        Normal
  03/19/2026 04 PM PDT           42.88           2319         -              Normal
  03/19/2026 05 PM PDT           42.87           2315         -              Normal
  03/19/2026 06 PM PDT           42.85           2307         -              Normal
  03/19/2026 07 PM PDT           42.84           2302         -              Normal
  03/19/2026 08 PM PDT           42.84           2302         0              Normal
  03/19/2026 09 PM PDT           42.83           2298         -              Normal
  03/19/2026 10 PM PDT           42.81           2290         -              Normal
  03/19/2026 11 PM PDT           42.79           2281         -              Normal
  03/20/2026 12 AM PDT           42.74           2260         -              Normal
  03/20/2026 01 AM PDT           42.66           2226         -              Normal
  03/20/2026 02 AM PDT           42.57           2188         -              Normal
  03/20/2026 03 AM PDT           42.50           2159         -              Normal
  03/20/2026 04 AM PDT           42.44           2134         -              Normal
  03/20/2026 05 AM PDT           42.39           2113         -              Normal
  03/20/2026 06 AM PDT           42.35           2097         -              Normal
  03/20/2026 07 AM PDT           42.31           2080         -              Normal
  03/20/2026 08 AM PDT           42.27           2063         -              Normal
  03/20/2026 09 AM PDT           42.24           2051         -              Normal
  03/20/2026 10 AM PDT           42.21           2039         -              Normal
  03/20/2026 11 AM PDT           42.19           2030         -              Normal
  03/20/2026 12 PM PDT           42.16           2018         -              Normal
  03/20/2026 01 PM PDT           42.14           2010         -              Normal
  03/20/2026 02 PM PDT           42.12           2002         -              Normal
  03/20/2026 03 PM PDT           42.11           1998         -              Normal
  03/20/2026 04 PM PDT           42.09           1990         -              Normal
  03/20/2026 05 PM PDT           42.08           1985         -              Normal
  03/20/2026 06 PM PDT           42.06           1977         -              Normal
  03/20/2026 07 PM PDT           42.05           1973         -              Normal
  03/20/2026 08 PM PDT           42.04           1969         -              Normal
  03/20/2026 09 PM PDT           42.04           1969         0              Normal
  03/20/2026 10 PM PDT           42.02           1961         -              Normal
  03/20/2026 11 PM PDT           42.00           1953         -              Normal
  03/21/2026 12 AM PDT           41.95           1933         -              Normal
  03/21/2026 01 AM PDT           41.88           1904         -              Normal
  03/21/2026 02 AM PDT           41.82           1880         -              Normal
  03/21/2026 03 AM PDT           41.74           1848         -              Normal
  03/21/2026 04 AM PDT           41.68           1824         -              Normal
  03/21/2026 05 AM PDT           41.62           1800         -              Normal
  03/21/2026 06 AM PDT           41.56           1777         -              Normal
  03/21/2026 07 AM PDT           41.52           1761         -              Normal
  03/21/2026 08 AM PDT           41.47           1741         -              Normal
  03/21/2026 09 AM PDT           41.43           1725         -              Normal
  03/21/2026 10 AM PDT           41.40           1714         -              Normal
  03/21/2026 11 AM PDT           41.37           1702         -              Normal
  03/21/2026 12 PM PDT           41.34           1690         -              Normal
  03/21/2026 01 PM PDT           41.31           1679         -              Normal
  03/21/2026 02 PM PDT           41.29           1671         -              Normal
  03/21/2026 03 PM PDT           41.27           1663         -              Normal
  03/21/2026 04 PM PDT           41.25           1655         -              Normal
  03/21/2026 05 PM PDT           41.24           1651         -              Normal
  03/21/2026 06 PM PDT           41.22           1644         -              Normal
  03/21/2026 07 PM PDT           41.21           1640         -              Normal
  03/21/2026 08 PM PDT           41.20           1636         -              Normal
  03/21/2026 09 PM PDT           41.19           1632         -              Normal
  03/21/2026 10 PM PDT           41.18           1628         -              Normal
  03/21/2026 11 PM PDT           41.15           1617         -              Normal
  03/22/2026 12 AM PDT           41.10           1597         -              Normal
  03/22/2026 01 AM PDT           41.05           1578         -              Normal
  03/22/2026 02 AM PDT           40.98           1552         -              Normal
  03/22/2026 03 AM PDT           40.92           1529         -              Normal
  03/22/2026 04 AM PDT           40.85           1502         -              Normal
  03/22/2026 05 AM PDT           40.80           1484         -              Normal
  03/22/2026 06 AM PDT           40.75           1465         -              Normal
  03/22/2026 07 AM PDT           40.70           1446         -              Normal
  03/22/2026 08 AM PDT           40.66           1431         -              Normal
  03/22/2026 09 AM PDT           40.63           1420         -              Normal
  03/22/2026 10 AM PDT           40.60           1409         -              Normal
  03/22/2026 11 AM PDT           40.57           1398         -              Normal
  03/22/2026 12 PM PDT           40.54           1387         -              Normal
  03/22/2026 01 PM PDT           40.52           1380         -              Normal
  03/22/2026 02 PM PDT           40.50           1372         -              Normal
  03/22/2026 03 PM PDT           40.48           1365         -              Normal
  03/22/2026 04 PM PDT           40.46           1358         -              Normal
  03/22/2026 05 PM PDT           40.45           1354         -              Normal
  03/22/2026 06 PM PDT           40.43           1347         -              Normal
  03/22/2026 07 PM PDT           40.42           1343         -              Normal
  03/22/2026 08 PM PDT           40.41           1339         -              Normal
  03/22/2026 09 PM PDT           40.40           1336         -              Normal
  03/22/2026 10 PM PDT           40.39           1332         -              Normal
  03/22/2026 11 PM PDT           40.39           1332         0              Normal
  03/23/2026 12 AM PDT           40.38           1328         -              Normal
  03/23/2026 01 AM PDT           40.37           1325         -              Normal
  03/23/2026 02 AM PDT           40.37           1325         0              Normal
  03/23/2026 03 AM PDT           40.36           1321         -              Normal
  03/23/2026 04 AM PDT           40.36           1321         0              Normal
  03/23/2026 05 AM PDT           40.35           1318         -              Normal
  03/23/2026 06 AM PDT           40.35           1318         0              Normal
  03/23/2026 07 AM PDT           40.35           1318         0              Normal
  03/23/2026 08 AM PDT           40.34           1314         -              Normal
  03/23/2026 09 AM PDT           40.34           1314         0              Normal
  03/23/2026 10 AM PDT           40.34           1314         0              Normal
  03/23/2026 11 AM PDT           40.34           1314         0              Normal
  03/23/2026 12 PM PDT           40.34           1314         0              Normal
  03/23/2026 01 PM PDT           40.33           1310         -              Normal
  03/23/2026 02 PM PDT           40.33           1310         0              Normal
  03/23/2026 03 PM PDT           40.33           1310         0              Normal
  03/23/2026 04 PM PDT           40.33           1310         0              Normal
  03/23/2026 05 PM PDT           40.33           1310         0              Normal
  03/23/2026 06 PM PDT           40.33           1310         0              Normal
  03/23/2026 07 PM PDT           40.33           1310         0              Normal
  03/23/2026 08 PM PDT           40.33           1310         0              Normal
  03/23/2026 09 PM PDT           40.33           1310         0              Normal
  03/23/2026 10 PM PDT           40.33           1310         0              Normal
  03/23/2026 11 PM PDT           40.32           1307         -              Normal
  03/24/2026 12 AM PDT           40.32           1307         0              Normal
  03/24/2026 01 AM PDT           40.32           1307         0              Normal
  03/24/2026 02 AM PDT           40.32           1307         0              Normal
  03/24/2026 03 AM PDT           40.32           1307         0              Normal
  03/24/2026 04 AM PDT           40.32           1307         0              Normal
  03/24/2026 05 AM PDT           40.32           1307         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.