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 30 2026 at 8:10 AM PDTNext Issuance: Oct 31 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:  10/30/2026 at 08:10 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/25/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       39.18 Feet
# Maximum Observed Flow:                        916 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/30/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       36.99 Feet
# Maximum Forecast Flow:                        220 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/25/2026 08 AM PDT           39.18            916                        Normal
  10/25/2026 09 AM PDT           39.16            909         -              Normal
  10/25/2026 10 AM PDT           39.14            903         -              Normal
  10/25/2026 11 AM PDT           39.12            896         -              Normal
  10/25/2026 12 PM PDT           39.13            899         +              Normal
  10/25/2026 01 PM PDT           39.12            896         -              Normal
  10/25/2026 02 PM PDT           39.10            889         -              Normal
  10/25/2026 03 PM PDT           39.08            882         -              Normal
  10/25/2026 04 PM PDT           39.05            872         -              Normal
  10/25/2026 05 PM PDT           39.02            862         -              Normal
  10/25/2026 06 PM PDT           38.98            848         -              Normal
  10/25/2026 07 PM PDT           38.93            830         -              Normal
  10/25/2026 08 PM PDT           38.88            812         -              Normal
  10/25/2026 09 PM PDT           38.83            793         -              Normal
  10/25/2026 10 PM PDT           38.75            765         -              Normal
  10/25/2026 11 PM PDT           38.70            747         -              Normal
  10/26/2026 12 AM PDT           38.65            729         -              Normal
  10/26/2026 01 AM PDT           38.60            711         -              Normal
  10/26/2026 02 AM PDT           38.55            694         -              Normal
  10/26/2026 03 AM PDT           38.50            676         -              Normal
  10/26/2026 04 AM PDT           38.46            663         -              Normal
  10/26/2026 05 AM PDT           38.43            652         -              Normal
  10/26/2026 06 AM PDT           38.39            639         -              Normal
  10/26/2026 07 AM PDT           38.36            628         -              Normal
  10/26/2026 08 AM PDT           38.33            618         -              Normal
  10/26/2026 09 AM PDT           38.30            608         -              Normal
  10/26/2026 10 AM PDT           38.29            605         -              Normal
  10/26/2026 11 AM PDT           38.26            595         -              Normal
  10/26/2026 12 PM PDT           38.25            592         -              Normal
  10/26/2026 01 PM PDT           38.25            592         0              Normal
  10/26/2026 02 PM PDT           38.23            585         -              Normal
  10/26/2026 03 PM PDT           38.21            578         -              Normal
  10/26/2026 04 PM PDT           38.19            572         -              Normal
  10/26/2026 05 PM PDT           38.16            562         -              Normal
  10/26/2026 06 PM PDT           38.14            555         -              Normal
  10/26/2026 07 PM PDT           38.12            549         -              Normal
  10/26/2026 08 PM PDT           38.08            536         -              Normal
  10/26/2026 09 PM PDT           38.04            523         -              Normal
  10/26/2026 10 PM PDT           38.00            510         -              Normal
  10/26/2026 11 PM PDT           37.96            497         -              Normal
  10/27/2026 12 AM PDT           37.91            481         -              Normal
  10/27/2026 01 AM PDT           37.85            463         -              Normal
  10/27/2026 02 AM PDT           37.81            450         -              Normal
  10/27/2026 03 AM PDT           37.76            435         -              Normal
  10/27/2026 04 AM PDT           37.72            423         -              Normal
  10/27/2026 05 AM PDT           37.67            408         -              Normal
  10/27/2026 06 AM PDT           37.62            393         -              Normal
  10/27/2026 07 AM PDT           37.58            381         -              Normal
  10/27/2026 08 AM PDT           37.55            372         -              Normal
  10/27/2026 09 AM PDT           37.52            364         -              Normal
  10/27/2026 10 AM PDT           37.49            355         -              Normal
  10/27/2026 11 AM PDT           37.48            352         -              Normal
  10/27/2026 12 PM PDT           37.46            346         -              Normal
  10/27/2026 01 PM PDT           37.45            344         -              Normal
  10/27/2026 02 PM PDT           37.42            335         -              Normal
  10/27/2026 03 PM PDT           37.40            329         -              Normal
  10/27/2026 04 PM PDT           37.36            318         -              Normal
  10/27/2026 05 PM PDT           37.34            313         -              Normal
  10/27/2026 06 PM PDT           37.31            304         -              Normal
  10/27/2026 07 PM PDT           37.28            296         -              Normal
  10/27/2026 08 PM PDT           37.26            291         -              Normal
  10/27/2026 09 PM PDT           37.25            288         -              Normal
  10/27/2026 10 PM PDT           37.23            283         -              Normal
  10/27/2026 11 PM PDT           37.22            280         -              Normal
  10/28/2026 12 AM PDT           37.20            275         -              Normal
  10/28/2026 01 AM PDT           37.19            272         -              Normal
  10/28/2026 02 AM PDT           37.18            269         -              Normal
  10/28/2026 03 AM PDT           37.18            269         0              Normal
  10/28/2026 04 AM PDT           37.20            275         +              Normal
  10/28/2026 05 AM PDT           37.21            277         +              Normal
  10/28/2026 06 AM PDT           37.22            280         +              Normal
  10/28/2026 07 AM PDT           37.22            280         0              Normal
  10/28/2026 08 AM PDT           37.22            280         0              Normal
  10/28/2026 09 AM PDT           37.23            283         +              Normal
  10/28/2026 10 AM PDT           37.22            280         -              Normal
  10/28/2026 11 AM PDT           37.21            277         -              Normal
  10/28/2026 12 PM PDT           37.21            277         0              Normal
  10/28/2026 01 PM PDT           37.21            277         0              Normal
  10/28/2026 02 PM PDT           37.20            275         -              Normal
  10/28/2026 03 PM PDT           37.20            275         0              Normal
  10/28/2026 04 PM PDT           37.19            272         -              Normal
  10/28/2026 05 PM PDT           37.17            267         -              Normal
  10/28/2026 06 PM PDT           37.16            264         -              Normal
  10/28/2026 07 PM PDT           37.14            259         -              Normal
  10/28/2026 08 PM PDT           37.13            256         -              Normal
  10/28/2026 09 PM PDT           37.12            253         -              Normal
  10/28/2026 10 PM PDT           37.12            253         0              Normal
  10/28/2026 11 PM PDT           37.12            253         0              Normal
  10/29/2026 12 AM PDT           37.11            251         -              Normal
  10/29/2026 01 AM PDT           37.11            251         0              Normal
  10/29/2026 02 AM PDT           37.11            251         0              Normal
  10/29/2026 03 AM PDT           37.11            251         0              Normal
  10/29/2026 04 AM PDT           37.11            251         0              Normal
  10/29/2026 05 AM PDT           37.11            251         0              Normal
  10/29/2026 06 AM PDT           37.11            251         0              Normal
  10/29/2026 07 AM PDT           37.11            251         0              Normal
  10/29/2026 08 AM PDT           37.12            253         +              Normal
  10/29/2026 09 AM PDT           37.12            253         0              Normal
  10/29/2026 10 AM PDT           37.12            253         0              Normal
  10/29/2026 11 AM PDT           37.13            256         +              Normal
  10/29/2026 12 PM PDT           37.12            253         -              Normal
  10/29/2026 01 PM PDT           37.12            253         0              Normal
  10/29/2026 02 PM PDT           37.11            251         -              Normal
  10/29/2026 03 PM PDT           37.10            248         -              Normal
  10/29/2026 04 PM PDT           37.09            246         -              Normal
  10/29/2026 05 PM PDT           37.08            243         -              Normal
  10/29/2026 06 PM PDT           37.08            243         0              Normal
  10/29/2026 07 PM PDT           37.07            241         -              Normal
  10/29/2026 08 PM PDT           37.06            238         -              Normal
  10/29/2026 09 PM PDT           37.05            235         -              Normal
  10/29/2026 10 PM PDT           37.04            233         -              Normal
  10/29/2026 11 PM PDT           37.03            230         -              Normal
  10/30/2026 12 AM PDT           37.02            228         -              Normal
  10/30/2026 01 AM PDT           37.02            228         0              Normal
  10/30/2026 02 AM PDT           37.01            225         -              Normal
  10/30/2026 03 AM PDT           37.01            225         0              Normal
  10/30/2026 04 AM PDT           37.00            223         -              Normal
  10/30/2026 05 AM PDT           36.99            220         -              Normal
  10/30/2026 06 AM PDT           36.99            220         0              Normal
  10/30/2026 07 AM PDT           36.99            220         0              Normal
  10/30/2026 08 AM PDT           36.99            220         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/30/2026 09 AM PDT           36.99            220                        Normal
  10/30/2026 10 AM PDT           36.99            220         0              Normal
  10/30/2026 11 AM PDT           36.99            220         0              Normal
  10/30/2026 12 PM PDT           36.98            218         -              Normal
  10/30/2026 01 PM PDT           36.98            218         0              Normal
  10/30/2026 02 PM PDT           36.98            218         0              Normal
  10/30/2026 03 PM PDT           36.97            215         -              Normal
  10/30/2026 04 PM PDT           36.97            215         0              Normal
  10/30/2026 05 PM PDT           36.97            215         0              Normal
  10/30/2026 06 PM PDT           36.97            215         0              Normal
  10/30/2026 07 PM PDT           36.96            213         -              Normal
  10/30/2026 08 PM PDT           36.96            213         0              Normal
  10/30/2026 09 PM PDT           36.95            210         -              Normal
  10/30/2026 10 PM PDT           36.95            210         0              Normal
  10/30/2026 11 PM PDT           36.95            210         0              Normal
  10/31/2026 12 AM PDT           36.94            208         -              Normal
  10/31/2026 01 AM PDT           36.94            208         0              Normal
  10/31/2026 02 AM PDT           36.93            205         -              Normal
  10/31/2026 03 AM PDT           36.92            203         -              Normal
  10/31/2026 04 AM PDT           36.91            200         -              Normal
  10/31/2026 05 AM PDT           36.90            198         -              Normal
  10/31/2026 06 AM PDT           36.90            198         0              Normal
  10/31/2026 07 AM PDT           36.89            196         -              Normal
  10/31/2026 08 AM PDT           36.89            196         0              Normal
  10/31/2026 09 AM PDT           36.88            194         -              Normal
  10/31/2026 10 AM PDT           36.88            194         0              Normal
  10/31/2026 11 AM PDT           36.87            192         -              Normal
  10/31/2026 12 PM PDT           36.87            192         0              Normal
  10/31/2026 01 PM PDT           36.87            192         0              Normal
  10/31/2026 02 PM PDT           36.87            192         0              Normal
  10/31/2026 03 PM PDT           36.86            190         -              Normal
  10/31/2026 04 PM PDT           36.86            190         0              Normal
  10/31/2026 05 PM PDT           36.86            190         0              Normal
  10/31/2026 06 PM PDT           36.86            190         0              Normal
  10/31/2026 07 PM PDT           36.86            190         0              Normal
  10/31/2026 08 PM PDT           36.86            190         0              Normal
  10/31/2026 09 PM PDT           36.86            190         0              Normal
  10/31/2026 10 PM PDT           36.86            190         0              Normal
  10/31/2026 11 PM PDT           36.86            190         0              Normal
  11/01/2026 12 AM PDT           36.86            190         0              Normal
  11/01/2026 01 AM PDT           36.86            190         0              Normal
  11/01/2026 01 AM PST           36.86            190         0              Normal
  11/01/2026 02 AM PST           36.86            190         0              Normal
  11/01/2026 03 AM PST           36.86            190         0              Normal
  11/01/2026 04 AM PST           36.86            190         0              Normal
  11/01/2026 05 AM PST           36.86            190         0              Normal
  11/01/2026 06 AM PST           36.85            187         -              Normal
  11/01/2026 07 AM PST           36.85            187         0              Normal
  11/01/2026 08 AM PST           36.85            187         0              Normal
  11/01/2026 09 AM PST           36.85            187         0              Normal
  11/01/2026 10 AM PST           36.85            187         0              Normal
  11/01/2026 11 AM PST           36.85            187         0              Normal
  11/01/2026 12 PM PST           36.85            187         0              Normal
  11/01/2026 01 PM PST           36.85            187         0              Normal
  11/01/2026 02 PM PST           36.85            187         0              Normal
  11/01/2026 03 PM PST           36.85            187         0              Normal
  11/01/2026 04 PM PST           36.85            187         0              Normal
  11/01/2026 05 PM PST           36.85            187         0              Normal
  11/01/2026 06 PM PST           36.85            187         0              Normal
  11/01/2026 07 PM PST           36.85            187         0              Normal
  11/01/2026 08 PM PST           36.86            190         +              Normal
  11/01/2026 09 PM PST           36.86            190         0              Normal
  11/01/2026 10 PM PST           36.87            192         +              Normal
  11/01/2026 11 PM PST           36.88            194         +              Normal
  11/02/2026 12 AM PST           36.89            196         +              Normal
  11/02/2026 01 AM PST           36.90            198         +              Normal
  11/02/2026 02 AM PST           36.91            200         +              Normal
  11/02/2026 03 AM PST           36.92            203         +              Normal
  11/02/2026 04 AM PST           36.93            205         +              Normal
  11/02/2026 05 AM PST           36.93            205         0              Normal
  11/02/2026 06 AM PST           36.94            208         +              Normal
  11/02/2026 07 AM PST           36.94            208         0              Normal
  11/02/2026 08 AM PST           36.95            210         +              Normal
  11/02/2026 09 AM PST           36.95            210         0              Normal
  11/02/2026 10 AM PST           36.95            210         0              Normal
  11/02/2026 11 AM PST           36.94            208         -              Normal
  11/02/2026 12 PM PST           36.94            208         0              Normal
  11/02/2026 01 PM PST           36.94            208         0              Normal
  11/02/2026 02 PM PST           36.93            205         -              Normal
  11/02/2026 03 PM PST           36.92            203         -              Normal
  11/02/2026 04 PM PST           36.92            203         0              Normal
  11/02/2026 05 PM PST           36.91            200         -              Normal
  11/02/2026 06 PM PST           36.91            200         0              Normal
  11/02/2026 07 PM PST           36.90            198         -              Normal
  11/02/2026 08 PM PST           36.89            196         -              Normal
  11/02/2026 09 PM PST           36.89            196         0              Normal
  11/02/2026 10 PM PST           36.88            194         -              Normal
  11/02/2026 11 PM PST           36.88            194         0              Normal
  11/03/2026 12 AM PST           36.87            192         -              Normal
  11/03/2026 01 AM PST           36.87            192         0              Normal
  11/03/2026 02 AM PST           36.87            192         0              Normal
  11/03/2026 03 AM PST           36.86            190         -              Normal
  11/03/2026 04 AM PST           36.86            190         0              Normal
  11/03/2026 05 AM PST           36.86            190         0              Normal
  11/03/2026 06 AM PST           36.85            187         -              Normal
  11/03/2026 07 AM PST           36.85            187         0              Normal
  11/03/2026 08 AM PST           36.85            187         0              Normal
  11/03/2026 09 AM PST           36.85            187         0              Normal
  11/03/2026 10 AM PST           36.85            187         0              Normal
  11/03/2026 11 AM PST           36.85            187         0              Normal
  11/03/2026 12 PM PST           36.84            185         -              Normal
  11/03/2026 01 PM PST           36.84            185         0              Normal
  11/03/2026 02 PM PST           36.84            185         0              Normal
  11/03/2026 03 PM PST           36.84            185         0              Normal
  11/03/2026 04 PM PST           36.84            185         0              Normal
  11/03/2026 05 PM PST           36.84            185         0              Normal
  11/03/2026 06 PM PST           36.84            185         0              Normal
  11/03/2026 07 PM PST           36.84            185         0              Normal
  11/03/2026 08 PM PST           36.84            185         0              Normal
  11/03/2026 09 PM PST           36.84            185         0              Normal
  11/03/2026 10 PM PST           36.84            185         0              Normal
  11/03/2026 11 PM PST           36.84            185         0              Normal
  11/04/2026 12 AM PST           36.84            185         0              Normal
  11/04/2026 01 AM PST           36.84            185         0              Normal
  11/04/2026 02 AM PST           36.84            185         0              Normal
  11/04/2026 03 AM PST           36.84            185         0              Normal
  11/04/2026 04 AM PST           36.84            185         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.