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 22 2026 at 7:36 AM PDTNext Issuance: Mar 23 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:  03/22/2026 at 07:36 AM 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:     03/22/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       40.60 Feet
# Maximum Forecast Flow:                        1409 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  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
  03/19/2026 03 PM PDT           42.91           2332         -              Normal
  03/19/2026 04 PM PDT           42.88           2319         -              Normal
  03/19/2026 05 PM PDT           42.86           2311         -              Normal
  03/19/2026 06 PM PDT           42.84           2302         -              Normal
  03/19/2026 07 PM PDT           42.83           2298         -              Normal
  03/19/2026 08 PM PDT           42.81           2290         -              Normal
  03/19/2026 09 PM PDT           42.80           2285         -              Normal
  03/19/2026 10 PM PDT           42.77           2273         -              Normal
  03/19/2026 11 PM PDT           42.75           2264         -              Normal
  03/20/2026 12 AM PDT           42.71           2247         -              Normal
  03/20/2026 01 AM PDT           42.66           2226         -              Normal
  03/20/2026 02 AM PDT           42.61           2205         -              Normal
  03/20/2026 03 AM PDT           42.56           2184         -              Normal
  03/20/2026 04 AM PDT           42.50           2159         -              Normal
  03/20/2026 05 AM PDT           42.45           2138         -              Normal
  03/20/2026 06 AM PDT           42.38           2109         -              Normal
  03/20/2026 07 AM PDT           42.32           2084         -              Normal
  03/20/2026 08 AM PDT           42.27           2063         -              Normal
  03/20/2026 09 AM PDT           42.23           2047         -              Normal
  03/20/2026 10 AM PDT           42.18           2026         -              Normal
  03/20/2026 11 AM PDT           42.14           2010         -              Normal
  03/20/2026 12 PM PDT           42.11           1998         -              Normal
  03/20/2026 01 PM PDT           42.07           1981         -              Normal
  03/20/2026 02 PM PDT           42.04           1969         -              Normal
  03/20/2026 03 PM PDT           42.04           1969         0              Normal
  03/20/2026 04 PM PDT           41.99           1949         -              Normal
  03/20/2026 05 PM PDT           41.97           1941         -              Normal
  03/20/2026 06 PM PDT           41.95           1933         -              Normal
  03/20/2026 07 PM PDT           41.94           1929         -              Normal
  03/20/2026 08 PM PDT           41.90           1912         -              Normal
  03/20/2026 09 PM PDT           41.89           1908         -              Normal
  03/20/2026 10 PM PDT           41.88           1904         -              Normal
  03/20/2026 11 PM PDT           41.84           1888         -              Normal
  03/21/2026 12 AM PDT           41.81           1876         -              Normal
  03/21/2026 01 AM PDT           41.75           1852         -              Normal
  03/21/2026 02 AM PDT           41.70           1832         -              Normal
  03/21/2026 03 AM PDT           41.64           1808         -              Normal
  03/21/2026 04 AM PDT           41.59           1788         -              Normal
  03/21/2026 05 AM PDT           41.54           1769         -              Normal
  03/21/2026 06 AM PDT           41.48           1745         -              Normal
  03/21/2026 07 AM PDT           41.40           1714         -              Normal
  03/21/2026 08 AM PDT           41.35           1694         -              Normal
  03/21/2026 09 AM PDT           41.31           1679         -              Normal
  03/21/2026 10 AM PDT           41.26           1659         -              Normal
  03/21/2026 11 AM PDT           41.23           1648         -              Normal
  03/21/2026 12 PM PDT           41.19           1632         -              Normal
  03/21/2026 01 PM PDT           41.16           1620         -              Normal
  03/21/2026 02 PM PDT           41.13           1609         -              Normal
  03/21/2026 03 PM PDT           41.12           1605         -              Normal
  03/21/2026 04 PM PDT           41.09           1594         -              Normal
  03/21/2026 05 PM PDT           41.08           1590         -              Normal
  03/21/2026 06 PM PDT           41.07           1586         -              Normal
  03/21/2026 07 PM PDT           41.06           1582         -              Normal
  03/21/2026 08 PM PDT           41.04           1574         -              Normal
  03/21/2026 09 PM PDT           41.03           1571         -              Normal
  03/21/2026 10 PM PDT           40.99           1555         -              Normal
  03/21/2026 11 PM PDT           40.98           1552         -              Normal
  03/22/2026 12 AM PDT           40.95           1540         -              Normal
  03/22/2026 01 AM PDT           40.92           1529         -              Normal
  03/22/2026 02 AM PDT           40.86           1506         -              Normal
  03/22/2026 03 AM PDT           40.83           1495         -              Normal
  03/22/2026 04 AM PDT           40.79           1480         -              Normal
  03/22/2026 05 AM PDT           40.75           1465         -              Normal
  03/22/2026 06 AM PDT           40.70           1446         -              Normal
  03/22/2026 07 AM PDT           40.65           1428         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/22/2026 08 AM PDT           40.60           1409                        Normal
  03/22/2026 09 AM PDT           40.56           1394         -              Normal
  03/22/2026 10 AM PDT           40.52           1380         -              Normal
  03/22/2026 11 AM PDT           40.49           1369         -              Normal
  03/22/2026 12 PM PDT           40.46           1358         -              Normal
  03/22/2026 01 PM PDT           40.43           1347         -              Normal
  03/22/2026 02 PM PDT           40.41           1339         -              Normal
  03/22/2026 03 PM PDT           40.39           1332         -              Normal
  03/22/2026 04 PM PDT           40.38           1328         -              Normal
  03/22/2026 05 PM PDT           40.36           1321         -              Normal
  03/22/2026 06 PM PDT           40.35           1318         -              Normal
  03/22/2026 07 PM PDT           40.34           1314         -              Normal
  03/22/2026 08 PM PDT           40.34           1314         0              Normal
  03/22/2026 09 PM PDT           40.33           1310         -              Normal
  03/22/2026 10 PM PDT           40.32           1307         -              Normal
  03/22/2026 11 PM PDT           40.30           1299         -              Normal
  03/23/2026 12 AM PDT           40.26           1285         -              Normal
  03/23/2026 01 AM PDT           40.21           1267         -              Normal
  03/23/2026 02 AM PDT           40.16           1249         -              Normal
  03/23/2026 03 AM PDT           40.10           1228         -              Normal
  03/23/2026 04 AM PDT           40.04           1207         -              Normal
  03/23/2026 05 AM PDT           39.98           1185         -              Normal
  03/23/2026 06 AM PDT           39.94           1171         -              Normal
  03/23/2026 07 AM PDT           39.89           1154         -              Normal
  03/23/2026 08 AM PDT           39.85           1140         -              Normal
  03/23/2026 09 AM PDT           39.82           1129         -              Normal
  03/23/2026 10 AM PDT           39.79           1119         -              Normal
  03/23/2026 11 AM PDT           39.76           1109         -              Normal
  03/23/2026 12 PM PDT           39.73           1098         -              Normal
  03/23/2026 01 PM PDT           39.71           1091         -              Normal
  03/23/2026 02 PM PDT           39.69           1085         -              Normal
  03/23/2026 03 PM PDT           39.67           1078         -              Normal
  03/23/2026 04 PM PDT           39.66           1074         -              Normal
  03/23/2026 05 PM PDT           39.64           1067         -              Normal
  03/23/2026 06 PM PDT           39.63           1064         -              Normal
  03/23/2026 07 PM PDT           39.62           1061         -              Normal
  03/23/2026 08 PM PDT           39.60           1054         -              Normal
  03/23/2026 09 PM PDT           39.60           1054         0              Normal
  03/23/2026 10 PM PDT           39.59           1050         -              Normal
  03/23/2026 11 PM PDT           39.58           1047         -              Normal
  03/24/2026 12 AM PDT           39.56           1040         -              Normal
  03/24/2026 01 AM PDT           39.54           1034         -              Normal
  03/24/2026 02 AM PDT           39.50           1020         -              Normal
  03/24/2026 03 AM PDT           39.46           1007         -              Normal
  03/24/2026 04 AM PDT           39.42            993         -              Normal
  03/24/2026 05 AM PDT           39.37            976         -              Normal
  03/24/2026 06 AM PDT           39.33            963         -              Normal
  03/24/2026 07 AM PDT           39.29            950         -              Normal
  03/24/2026 08 AM PDT           39.26            940         -              Normal
  03/24/2026 09 AM PDT           39.23            930         -              Normal
  03/24/2026 10 AM PDT           39.20            920         -              Normal
  03/24/2026 11 AM PDT           39.18            914         -              Normal
  03/24/2026 12 PM PDT           39.15            904         -              Normal
  03/24/2026 01 PM PDT           39.13            898         -              Normal
  03/24/2026 02 PM PDT           39.12            894         -              Normal
  03/24/2026 03 PM PDT           39.10            888         -              Normal
  03/24/2026 04 PM PDT           39.09            885         -              Normal
  03/24/2026 05 PM PDT           39.08            881         -              Normal
  03/24/2026 06 PM PDT           39.06            875         -              Normal
  03/24/2026 07 PM PDT           39.05            872         -              Normal
  03/24/2026 08 PM PDT           39.04            868         -              Normal
  03/24/2026 09 PM PDT           39.04            868         0              Normal
  03/24/2026 10 PM PDT           39.03            865         -              Normal
  03/24/2026 11 PM PDT           39.02            862         -              Normal
  03/25/2026 12 AM PDT           39.02            862         0              Normal
  03/25/2026 01 AM PDT           39.01            859         -              Normal
  03/25/2026 02 AM PDT           39.01            859         0              Normal
  03/25/2026 03 AM PDT           39.00            856         -              Normal
  03/25/2026 04 AM PDT           39.00            856         0              Normal
  03/25/2026 05 AM PDT           39.00            856         0              Normal
  03/25/2026 06 AM PDT           38.99            852         -              Normal
  03/25/2026 07 AM PDT           38.99            852         0              Normal
  03/25/2026 08 AM PDT           38.99            852         0              Normal
  03/25/2026 09 AM PDT           38.99            852         0              Normal
  03/25/2026 10 AM PDT           38.98            849         -              Normal
  03/25/2026 11 AM PDT           38.98            849         0              Normal
  03/25/2026 12 PM PDT           38.98            849         0              Normal
  03/25/2026 01 PM PDT           38.98            849         0              Normal
  03/25/2026 02 PM PDT           38.98            849         0              Normal
  03/25/2026 03 PM PDT           38.98            849         0              Normal
  03/25/2026 04 PM PDT           38.98            849         0              Normal
  03/25/2026 05 PM PDT           38.98            849         0              Normal
  03/25/2026 06 PM PDT           38.97            846         -              Normal
  03/25/2026 07 PM PDT           38.97            846         0              Normal
  03/25/2026 08 PM PDT           38.97            846         0              Normal
  03/25/2026 09 PM PDT           38.97            846         0              Normal
  03/25/2026 10 PM PDT           38.97            846         0              Normal
  03/25/2026 11 PM PDT           38.97            846         0              Normal
  03/26/2026 12 AM PDT           38.97            846         0              Normal
  03/26/2026 01 AM PDT           38.97            846         0              Normal
  03/26/2026 02 AM PDT           38.97            846         0              Normal
  03/26/2026 03 AM PDT           38.97            846         0              Normal
  03/26/2026 04 AM PDT           38.97            846         0              Normal
  03/26/2026 05 AM PDT           38.97            846         0              Normal
  03/26/2026 06 AM PDT           38.97            846         0              Normal
  03/26/2026 07 AM PDT           38.97            846         0              Normal
  03/26/2026 08 AM PDT           38.97            846         0              Normal
  03/26/2026 09 AM PDT           38.97            846         0              Normal
  03/26/2026 10 AM PDT           38.97            846         0              Normal
  03/26/2026 11 AM PDT           38.97            846         0              Normal
  03/26/2026 12 PM PDT           38.97            846         0              Normal
  03/26/2026 01 PM PDT           38.97            846         0              Normal
  03/26/2026 02 PM PDT           38.97            846         0              Normal
  03/26/2026 03 PM PDT           38.97            846         0              Normal
  03/26/2026 04 PM PDT           38.97            846         0              Normal
  03/26/2026 05 PM PDT           38.97            846         0              Normal
  03/26/2026 06 PM PDT           38.97            846         0              Normal
  03/26/2026 07 PM PDT           38.97            846         0              Normal
  03/26/2026 08 PM PDT           38.97            846         0              Normal
  03/26/2026 09 PM PDT           38.97            846         0              Normal
  03/26/2026 10 PM PDT           38.97            846         0              Normal
  03/26/2026 11 PM PDT           38.97            846         0              Normal
  03/27/2026 12 AM PDT           38.97            846         0              Normal
  03/27/2026 01 AM PDT           38.97            846         0              Normal
  03/27/2026 02 AM PDT           38.97            846         0              Normal
  03/27/2026 03 AM PDT           38.97            846         0              Normal
  03/27/2026 04 AM PDT           38.97            846         0              Normal
  03/27/2026 05 AM PDT           38.97            846         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.