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: Apr 10 2026 at 1:25 PM PDTNext Issuance: Apr 11 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:  04/10/2026 at 01:25 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/09/2026 at 11:00 PM PDT
# Maximum Observed Stage:                       37.31 Feet
# Maximum Observed Flow:                        312 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/13/2026 at 02:00 PM PDT
# Maximum Forecast Stage:                       37.35 Feet
# Maximum Forecast Flow:                        323 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/05/2026 01 PM PDT           37.09            254                        Normal
  04/05/2026 02 PM PDT           37.09            254         0              Normal
  04/05/2026 03 PM PDT           37.09            254         0              Normal
  04/05/2026 04 PM PDT           37.09            254         0              Normal
  04/05/2026 05 PM PDT           37.11            259         +              Normal
  04/05/2026 06 PM PDT           37.09            254         -              Normal
  04/05/2026 07 PM PDT           37.09            254         0              Normal
  04/05/2026 08 PM PDT           37.09            254         0              Normal
  04/05/2026 09 PM PDT           37.09            254         0              Normal
  04/05/2026 10 PM PDT           37.09            254         0              Normal
  04/05/2026 11 PM PDT           37.09            254         0              Normal
  04/06/2026 12 AM PDT           37.09            254         0              Normal
  04/06/2026 01 AM PDT           37.09            254         0              Normal
  04/06/2026 02 AM PDT           37.10            257         +              Normal
  04/06/2026 03 AM PDT           37.10            257         0              Normal
  04/06/2026 04 AM PDT           37.10            257         0              Normal
  04/06/2026 05 AM PDT           37.10            257         0              Normal
  04/06/2026 06 AM PDT           37.11            259         +              Normal
  04/06/2026 07 AM PDT           37.11            259         0              Normal
  04/06/2026 08 AM PDT           37.12            262         +              Normal
  04/06/2026 09 AM PDT           37.12            262         0              Normal
  04/06/2026 10 AM PDT           37.13            264         +              Normal
  04/06/2026 11 AM PDT           37.14            267         +              Normal
  04/06/2026 12 PM PDT           37.15            270         +              Normal
  04/06/2026 01 PM PDT           37.13            264         -              Normal
  04/06/2026 02 PM PDT           37.13            264         0              Normal
  04/06/2026 03 PM PDT           37.12            262         -              Normal
  04/06/2026 04 PM PDT           37.12            262         0              Normal
  04/06/2026 05 PM PDT           37.12            262         0              Normal
  04/06/2026 06 PM PDT           37.11            259         -              Normal
  04/06/2026 07 PM PDT           37.11            259         0              Normal
  04/06/2026 08 PM PDT           37.10            257         -              Normal
  04/06/2026 09 PM PDT           37.10            257         0              Normal
  04/06/2026 10 PM PDT           37.09            254         -              Normal
  04/06/2026 11 PM PDT           37.09            254         0              Normal
  04/07/2026 12 AM PDT           37.08            251         -              Normal
  04/07/2026 01 AM PDT           37.10            257         +              Normal
  04/07/2026 02 AM PDT           37.11            259         +              Normal
  04/07/2026 03 AM PDT           37.13            264         +              Normal
  04/07/2026 04 AM PDT           37.14            267         +              Normal
  04/07/2026 05 AM PDT           37.14            267         0              Normal
  04/07/2026 06 AM PDT           37.13            264         -              Normal
  04/07/2026 07 AM PDT           37.13            264         0              Normal
  04/07/2026 08 AM PDT           37.12            262         -              Normal
  04/07/2026 09 AM PDT           37.12            262         0              Normal
  04/07/2026 10 AM PDT           37.13            264         +              Normal
  04/07/2026 11 AM PDT           37.13            264         0              Normal
  04/07/2026 12 PM PDT           37.13            264         0              Normal
  04/07/2026 01 PM PDT           37.13            264         0              Normal
  04/07/2026 02 PM PDT           37.13            264         0              Normal
  04/07/2026 03 PM PDT           37.13            264         0              Normal
  04/07/2026 04 PM PDT           37.12            262         -              Normal
  04/07/2026 05 PM PDT           37.12            262         0              Normal
  04/07/2026 06 PM PDT           37.12            262         0              Normal
  04/07/2026 07 PM PDT           37.12            262         0              Normal
  04/07/2026 08 PM PDT           37.11            259         -              Normal
  04/07/2026 09 PM PDT           37.11            259         0              Normal
  04/07/2026 10 PM PDT           37.11            259         0              Normal
  04/07/2026 11 PM PDT           37.12            262         +              Normal
  04/08/2026 12 AM PDT           37.12            262         0              Normal
  04/08/2026 01 AM PDT           37.12            262         0              Normal
  04/08/2026 02 AM PDT           37.13            264         +              Normal
  04/08/2026 03 AM PDT           37.13            264         0              Normal
  04/08/2026 04 AM PDT           37.13            264         0              Normal
  04/08/2026 05 AM PDT           37.13            264         0              Normal
  04/08/2026 06 AM PDT           37.13            264         0              Normal
  04/08/2026 07 AM PDT           37.13            264         0              Normal
  04/08/2026 08 AM PDT           37.14            267         +              Normal
  04/08/2026 09 AM PDT           37.14            267         0              Normal
  04/08/2026 10 AM PDT           37.15            270         +              Normal
  04/08/2026 11 AM PDT           37.14            267         -              Normal
  04/08/2026 12 PM PDT           37.13            264         -              Normal
  04/08/2026 01 PM PDT           37.12            262         -              Normal
  04/08/2026 02 PM PDT           37.11            259         -              Normal
  04/08/2026 03 PM PDT           37.10            257         -              Normal
  04/08/2026 04 PM PDT           37.09            254         -              Normal
  04/08/2026 05 PM PDT           37.09            254         0              Normal
  04/08/2026 06 PM PDT           37.09            254         0              Normal
  04/08/2026 07 PM PDT           37.09            254         0              Normal
  04/08/2026 08 PM PDT           37.09            254         0              Normal
  04/08/2026 09 PM PDT           37.09            254         0              Normal
  04/08/2026 10 PM PDT           37.09            254         0              Normal
  04/08/2026 11 PM PDT           37.10            257         +              Normal
  04/09/2026 12 AM PDT           37.10            257         0              Normal
  04/09/2026 01 AM PDT           37.09            254         -              Normal
  04/09/2026 02 AM PDT           37.10            257         +              Normal
  04/09/2026 03 AM PDT           37.11            259         +              Normal
  04/09/2026 04 AM PDT           37.11            259         0              Normal
  04/09/2026 05 AM PDT           37.11            259         0              Normal
  04/09/2026 06 AM PDT           37.11            259         0              Normal
  04/09/2026 07 AM PDT           37.11            259         0              Normal
  04/09/2026 08 AM PDT           37.11            259         0              Normal
  04/09/2026 09 AM PDT           37.11            259         0              Normal
  04/09/2026 10 AM PDT           37.11            259         0              Normal
  04/09/2026 11 AM PDT           37.12            262         +              Normal
  04/09/2026 12 PM PDT           37.11            259         -              Normal
  04/09/2026 01 PM PDT           37.11            259         0              Normal
  04/09/2026 02 PM PDT           37.10            257         -              Normal
  04/09/2026 03 PM PDT           37.10            257         0              Normal
  04/09/2026 04 PM PDT           37.09            254         -              Normal
  04/09/2026 05 PM PDT           37.09            254         0              Normal
  04/09/2026 06 PM PDT           37.09            254         0              Normal
  04/09/2026 07 PM PDT           37.11            259         +              Normal
  04/09/2026 08 PM PDT           37.16            272         +              Normal
  04/09/2026 09 PM PDT           37.23            291         +              Normal
  04/09/2026 10 PM PDT           37.25            296         +              Normal
  04/09/2026 11 PM PDT           37.31            312         +              Normal
  04/10/2026 12 AM PDT           37.28            304         -              Normal
  04/10/2026 01 AM PDT           37.24            293         -              Normal
  04/10/2026 02 AM PDT           37.20            283         -              Normal
  04/10/2026 03 AM PDT           37.17            275         -              Normal
  04/10/2026 04 AM PDT           37.15            270         -              Normal
  04/10/2026 05 AM PDT           37.14            267         -              Normal
  04/10/2026 06 AM PDT           37.13            264         -              Normal
  04/10/2026 07 AM PDT           37.12            262         -              Normal
  04/10/2026 08 AM PDT           37.12            262         0              Normal
  04/10/2026 09 AM PDT           37.11            259         -              Normal
  04/10/2026 10 AM PDT           37.12            262         +              Normal
  04/10/2026 11 AM PDT           37.13            264         +              Normal
  04/10/2026 12 PM PDT           37.13            264         0              Normal
  04/10/2026 01 PM PDT           37.13            264         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/10/2026 02 PM PDT           37.13            264                        Normal
  04/10/2026 03 PM PDT           37.13            264         0              Normal
  04/10/2026 04 PM PDT           37.13            264         0              Normal
  04/10/2026 05 PM PDT           37.13            264         0              Normal
  04/10/2026 06 PM PDT           37.13            264         0              Normal
  04/10/2026 07 PM PDT           37.14            267         +              Normal
  04/10/2026 08 PM PDT           37.14            267         0              Normal
  04/10/2026 09 PM PDT           37.14            267         0              Normal
  04/10/2026 10 PM PDT           37.14            267         0              Normal
  04/10/2026 11 PM PDT           37.14            267         0              Normal
  04/11/2026 12 AM PDT           37.14            267         0              Normal
  04/11/2026 01 AM PDT           37.14            267         0              Normal
  04/11/2026 02 AM PDT           37.14            267         0              Normal
  04/11/2026 03 AM PDT           37.14            267         0              Normal
  04/11/2026 04 AM PDT           37.14            267         0              Normal
  04/11/2026 05 AM PDT           37.14            267         0              Normal
  04/11/2026 06 AM PDT           37.14            267         0              Normal
  04/11/2026 07 AM PDT           37.14            267         0              Normal
  04/11/2026 08 AM PDT           37.14            267         0              Normal
  04/11/2026 09 AM PDT           37.14            267         0              Normal
  04/11/2026 10 AM PDT           37.14            267         0              Normal
  04/11/2026 11 AM PDT           37.13            264         -              Normal
  04/11/2026 12 PM PDT           37.13            264         0              Normal
  04/11/2026 01 PM PDT           37.13            264         0              Normal
  04/11/2026 02 PM PDT           37.13            264         0              Normal
  04/11/2026 03 PM PDT           37.13            264         0              Normal
  04/11/2026 04 PM PDT           37.14            267         +              Normal
  04/11/2026 05 PM PDT           37.14            267         0              Normal
  04/11/2026 06 PM PDT           37.15            270         +              Normal
  04/11/2026 07 PM PDT           37.15            270         0              Normal
  04/11/2026 08 PM PDT           37.16            272         +              Normal
  04/11/2026 09 PM PDT           37.16            272         0              Normal
  04/11/2026 10 PM PDT           37.17            275         +              Normal
  04/11/2026 11 PM PDT           37.18            277         +              Normal
  04/12/2026 12 AM PDT           37.18            277         0              Normal
  04/12/2026 01 AM PDT           37.19            280         +              Normal
  04/12/2026 02 AM PDT           37.19            280         0              Normal
  04/12/2026 03 AM PDT           37.20            283         +              Normal
  04/12/2026 04 AM PDT           37.20            283         0              Normal
  04/12/2026 05 AM PDT           37.20            283         0              Normal
  04/12/2026 06 AM PDT           37.21            285         +              Normal
  04/12/2026 07 AM PDT           37.21            285         0              Normal
  04/12/2026 08 AM PDT           37.21            285         0              Normal
  04/12/2026 09 AM PDT           37.21            285         0              Normal
  04/12/2026 10 AM PDT           37.21            285         0              Normal
  04/12/2026 11 AM PDT           37.21            285         0              Normal
  04/12/2026 12 PM PDT           37.21            285         0              Normal
  04/12/2026 01 PM PDT           37.21            285         0              Normal
  04/12/2026 02 PM PDT           37.20            283         -              Normal
  04/12/2026 03 PM PDT           37.20            283         0              Normal
  04/12/2026 04 PM PDT           37.20            283         0              Normal
  04/12/2026 05 PM PDT           37.20            283         0              Normal
  04/12/2026 06 PM PDT           37.20            283         0              Normal
  04/12/2026 07 PM PDT           37.20            283         0              Normal
  04/12/2026 08 PM PDT           37.20            283         0              Normal
  04/12/2026 09 PM PDT           37.20            283         0              Normal
  04/12/2026 10 PM PDT           37.21            285         +              Normal
  04/12/2026 11 PM PDT           37.22            288         +              Normal
  04/13/2026 12 AM PDT           37.23            291         +              Normal
  04/13/2026 01 AM PDT           37.24            293         +              Normal
  04/13/2026 02 AM PDT           37.25            296         +              Normal
  04/13/2026 03 AM PDT           37.27            301         +              Normal
  04/13/2026 04 AM PDT           37.28            304         +              Normal
  04/13/2026 05 AM PDT           37.29            307         +              Normal
  04/13/2026 06 AM PDT           37.30            310         +              Normal
  04/13/2026 07 AM PDT           37.31            312         +              Normal
  04/13/2026 08 AM PDT           37.32            315         +              Normal
  04/13/2026 09 AM PDT           37.33            318         +              Normal
  04/13/2026 10 AM PDT           37.34            321         +              Normal
  04/13/2026 11 AM PDT           37.34            321         0              Normal
  04/13/2026 12 PM PDT           37.34            321         0              Normal
  04/13/2026 01 PM PDT           37.34            321         0              Normal
  04/13/2026 02 PM PDT           37.35            323         +              Normal
  04/13/2026 03 PM PDT           37.35            323         0              Normal
  04/13/2026 04 PM PDT           37.35            323         0              Normal
  04/13/2026 05 PM PDT           37.35            323         0              Normal
  04/13/2026 06 PM PDT           37.35            323         0              Normal
  04/13/2026 07 PM PDT           37.35            323         0              Normal
  04/13/2026 08 PM PDT           37.35            323         0              Normal
  04/13/2026 09 PM PDT           37.35            323         0              Normal
  04/13/2026 10 PM PDT           37.35            323         0              Normal
  04/13/2026 11 PM PDT           37.35            323         0              Normal
  04/14/2026 12 AM PDT           37.35            323         0              Normal
  04/14/2026 01 AM PDT           37.35            323         0              Normal
  04/14/2026 02 AM PDT           37.35            323         0              Normal
  04/14/2026 03 AM PDT           37.34            321         -              Normal
  04/14/2026 04 AM PDT           37.34            321         0              Normal
  04/14/2026 05 AM PDT           37.33            318         -              Normal
  04/14/2026 06 AM PDT           37.32            315         -              Normal
  04/14/2026 07 AM PDT           37.31            312         -              Normal
  04/14/2026 08 AM PDT           37.30            310         -              Normal
  04/14/2026 09 AM PDT           37.29            307         -              Normal
  04/14/2026 10 AM PDT           37.28            304         -              Normal
  04/14/2026 11 AM PDT           37.27            301         -              Normal
  04/14/2026 12 PM PDT           37.26            299         -              Normal
  04/14/2026 01 PM PDT           37.24            293         -              Normal
  04/14/2026 02 PM PDT           37.23            291         -              Normal
  04/14/2026 03 PM PDT           37.22            288         -              Normal
  04/14/2026 04 PM PDT           37.21            285         -              Normal
  04/14/2026 05 PM PDT           37.20            283         -              Normal
  04/14/2026 06 PM PDT           37.19            280         -              Normal
  04/14/2026 07 PM PDT           37.19            280         0              Normal
  04/14/2026 08 PM PDT           37.18            277         -              Normal
  04/14/2026 09 PM PDT           37.17            275         -              Normal
  04/14/2026 10 PM PDT           37.16            272         -              Normal
  04/14/2026 11 PM PDT           37.16            272         0              Normal
  04/15/2026 12 AM PDT           37.15            270         -              Normal
  04/15/2026 01 AM PDT           37.15            270         0              Normal
  04/15/2026 02 AM PDT           37.14            267         -              Normal
  04/15/2026 03 AM PDT           37.14            267         0              Normal
  04/15/2026 04 AM PDT           37.13            264         -              Normal
  04/15/2026 05 AM PDT           37.13            264         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.