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 25 2026 at 8:34 AM PDTNext Issuance: Apr 26 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:  04/25/2026 at 08:34 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/21/2026 at 09:00 AM PDT
# Maximum Observed Stage:                       40.18 Feet
# Maximum Observed Flow:                        1274 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/29/2026 at 01:00 AM PDT
# Maximum Forecast Stage:                       40.71 Feet
# Maximum Forecast Flow:                        1476 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/20/2026 08 AM PDT           38.60            714                        Normal
  04/20/2026 09 AM PDT           38.65            731         +              Normal
  04/20/2026 10 AM PDT           38.72            755         +              Normal
  04/20/2026 11 AM PDT           38.75            766         +              Normal
  04/20/2026 12 PM PDT           38.82            791         +              Normal
  04/20/2026 01 PM PDT           38.87            809         +              Normal
  04/20/2026 02 PM PDT           38.93            830         +              Normal
  04/20/2026 03 PM PDT           39.01            859         +              Normal
  04/20/2026 04 PM PDT           39.08            882         +              Normal
  04/20/2026 05 PM PDT           39.15            906         +              Normal
  04/20/2026 06 PM PDT           39.22            930         +              Normal
  04/20/2026 07 PM PDT           39.29            954         +              Normal
  04/20/2026 08 PM PDT           39.36            978         +              Normal
  04/20/2026 09 PM PDT           39.42            999         +              Normal
  04/20/2026 10 PM PDT           39.48           1020         +              Normal
  04/20/2026 11 PM PDT           39.53           1038         +              Normal
  04/21/2026 12 AM PDT           39.57           1052         +              Normal
  04/21/2026 01 AM PDT           39.61           1066         +              Normal
  04/21/2026 02 AM PDT           39.65           1080         +              Normal
  04/21/2026 03 AM PDT           39.68           1091         +              Normal
  04/21/2026 04 AM PDT           39.73           1109         +              Normal
  04/21/2026 05 AM PDT           39.88           1163         +              Normal
  04/21/2026 06 AM PDT           40.03           1218         +              Normal
  04/21/2026 07 AM PDT           40.12           1251         +              Normal
  04/21/2026 08 AM PDT           40.17           1270         +              Normal
  04/21/2026 09 AM PDT           40.18           1274         +              Normal
  04/21/2026 10 AM PDT           40.16           1266         -              Normal
  04/21/2026 11 AM PDT           40.12           1251         -              Normal
  04/21/2026 12 PM PDT           40.10           1244         -              Normal
  04/21/2026 01 PM PDT           40.08           1237         -              Normal
  04/21/2026 02 PM PDT           40.06           1229         -              Normal
  04/21/2026 03 PM PDT           40.03           1218         -              Normal
  04/21/2026 04 PM PDT           40.03           1218         0              Normal
  04/21/2026 05 PM PDT           40.01           1211         -              Normal
  04/21/2026 06 PM PDT           40.00           1207         -              Normal
  04/21/2026 07 PM PDT           39.98           1200         -              Normal
  04/21/2026 08 PM PDT           39.99           1203         +              Normal
  04/21/2026 09 PM PDT           39.99           1203         0              Normal
  04/21/2026 10 PM PDT           39.96           1192         -              Normal
  04/21/2026 11 PM PDT           39.95           1189         -              Normal
  04/22/2026 12 AM PDT           39.93           1181         -              Normal
  04/22/2026 01 AM PDT           39.92           1178         -              Normal
  04/22/2026 02 AM PDT           39.90           1170         -              Normal
  04/22/2026 03 AM PDT           39.90           1170         0              Normal
  04/22/2026 04 AM PDT           39.88           1163         -              Normal
  04/22/2026 05 AM PDT           39.87           1159         -              Normal
  04/22/2026 06 AM PDT           39.87           1159         0              Normal
  04/22/2026 07 AM PDT           39.88           1163         +              Normal
  04/22/2026 08 AM PDT           39.88           1163         0              Normal
  04/22/2026 09 AM PDT           39.87           1159         -              Normal
  04/22/2026 10 AM PDT           39.88           1163         +              Normal
  04/22/2026 11 AM PDT           39.89           1167         +              Normal
  04/22/2026 12 PM PDT           39.89           1167         0              Normal
  04/22/2026 01 PM PDT           39.88           1163         -              Normal
  04/22/2026 02 PM PDT           39.88           1163         0              Normal
  04/22/2026 03 PM PDT           39.88           1163         0              Normal
  04/22/2026 04 PM PDT           39.87           1159         -              Normal
  04/22/2026 05 PM PDT           39.84           1148         -              Normal
  04/22/2026 06 PM PDT           39.81           1138         -              Normal
  04/22/2026 07 PM PDT           39.77           1123         -              Normal
  04/22/2026 08 PM PDT           39.74           1112         -              Normal
  04/22/2026 09 PM PDT           39.70           1098         -              Normal
  04/22/2026 10 PM PDT           39.68           1091         -              Normal
  04/22/2026 11 PM PDT           39.65           1080         -              Normal
  04/23/2026 12 AM PDT           39.61           1066         -              Normal
  04/23/2026 01 AM PDT           39.59           1059         -              Normal
  04/23/2026 02 AM PDT           39.56           1048         -              Normal
  04/23/2026 03 AM PDT           39.54           1041         -              Normal
  04/23/2026 04 AM PDT           39.53           1038         -              Normal
  04/23/2026 05 AM PDT           39.50           1027         -              Normal
  04/23/2026 06 AM PDT           39.50           1027         0              Normal
  04/23/2026 07 AM PDT           39.48           1020         -              Normal
  04/23/2026 08 AM PDT           39.47           1016         -              Normal
  04/23/2026 09 AM PDT           39.43           1002         -              Normal
  04/23/2026 10 AM PDT           39.41            995         -              Normal
  04/23/2026 11 AM PDT           39.38            985         -              Normal
  04/23/2026 12 PM PDT           39.37            982         -              Normal
  04/23/2026 01 PM PDT           39.36            978         -              Normal
  04/23/2026 02 PM PDT           39.33            968         -              Normal
  04/23/2026 03 PM PDT           39.31            961         -              Normal
  04/23/2026 04 PM PDT           39.28            950         -              Normal
  04/23/2026 05 PM PDT           39.25            940         -              Normal
  04/23/2026 06 PM PDT           39.22            930         -              Normal
  04/23/2026 07 PM PDT           39.19            920         -              Normal
  04/23/2026 08 PM PDT           39.14            903         -              Normal
  04/23/2026 09 PM PDT           39.10            889         -              Normal
  04/23/2026 10 PM PDT           39.06            876         -              Normal
  04/23/2026 11 PM PDT           39.03            866         -              Normal
  04/24/2026 12 AM PDT           38.98            848         -              Normal
  04/24/2026 01 AM PDT           38.94            834         -              Normal
  04/24/2026 02 AM PDT           38.91            823         -              Normal
  04/24/2026 03 AM PDT           38.88            812         -              Normal
  04/24/2026 04 AM PDT           38.84            798         -              Normal
  04/24/2026 05 AM PDT           38.81            787         -              Normal
  04/24/2026 06 AM PDT           38.77            773         -              Normal
  04/24/2026 07 AM PDT           38.74            762         -              Normal
  04/24/2026 08 AM PDT           38.73            759         -              Normal
  04/24/2026 09 AM PDT           38.70            748         -              Normal
  04/24/2026 10 AM PDT           38.69            745         -              Normal
  04/24/2026 11 AM PDT           38.68            741         -              Normal
  04/24/2026 12 PM PDT           38.67            738         -              Normal
  04/24/2026 01 PM PDT           38.66            734         -              Normal
  04/24/2026 02 PM PDT           38.65            731         -              Normal
  04/24/2026 03 PM PDT           38.66            734         +              Normal
  04/24/2026 04 PM PDT           38.66            734         0              Normal
  04/24/2026 05 PM PDT           38.66            734         0              Normal
  04/24/2026 06 PM PDT           38.69            745         +              Normal
  04/24/2026 07 PM PDT           38.72            755         +              Normal
  04/24/2026 08 PM PDT           38.75            766         +              Normal
  04/24/2026 09 PM PDT           38.80            784         +              Normal
  04/24/2026 10 PM PDT           38.84            798         +              Normal
  04/24/2026 11 PM PDT           38.89            816         +              Normal
  04/25/2026 12 AM PDT           38.92            827         +              Normal
  04/25/2026 01 AM PDT           38.95            837         +              Normal
  04/25/2026 02 AM PDT           38.99            852         +              Normal
  04/25/2026 03 AM PDT           39.02            862         +              Normal
  04/25/2026 04 AM PDT           39.04            869         +              Normal
  04/25/2026 05 AM PDT           39.06            876         +              Normal
  04/25/2026 06 AM PDT           39.08            882         +              Normal
  04/25/2026 07 AM PDT           39.09            886         +              Normal
  04/25/2026 08 AM PDT           39.11            893         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/25/2026 09 AM PDT           39.12            896                        Normal
  04/25/2026 10 AM PDT           39.14            903         +              Normal
  04/25/2026 11 AM PDT           39.15            906         +              Normal
  04/25/2026 12 PM PDT           39.16            909         +              Normal
  04/25/2026 01 PM PDT           39.17            913         +              Normal
  04/25/2026 02 PM PDT           39.22            930         +              Normal
  04/25/2026 03 PM PDT           39.34            971         +              Normal
  04/25/2026 04 PM PDT           39.49           1023         +              Normal
  04/25/2026 05 PM PDT           39.62           1069         +              Normal
  04/25/2026 06 PM PDT           39.74           1112         +              Normal
  04/25/2026 07 PM PDT           39.84           1148         +              Normal
  04/25/2026 08 PM PDT           39.94           1185         +              Normal
  04/25/2026 09 PM PDT           40.02           1214         +              Normal
  04/25/2026 10 PM PDT           40.09           1240         +              Normal
  04/25/2026 11 PM PDT           40.16           1266         +              Normal
  04/26/2026 12 AM PDT           40.22           1289         +              Normal
  04/26/2026 01 AM PDT           40.27           1308         +              Normal
  04/26/2026 02 AM PDT           40.31           1323         +              Normal
  04/26/2026 03 AM PDT           40.35           1338         +              Normal
  04/26/2026 04 AM PDT           40.39           1353         +              Normal
  04/26/2026 05 AM PDT           40.42           1364         +              Normal
  04/26/2026 06 AM PDT           40.45           1376         +              Normal
  04/26/2026 07 AM PDT           40.48           1387         +              Normal
  04/26/2026 08 AM PDT           40.50           1395         +              Normal
  04/26/2026 09 AM PDT           40.52           1403         +              Normal
  04/26/2026 10 AM PDT           40.54           1410         +              Normal
  04/26/2026 11 AM PDT           40.55           1414         +              Normal
  04/26/2026 12 PM PDT           40.57           1422         +              Normal
  04/26/2026 01 PM PDT           40.58           1426         +              Normal
  04/26/2026 02 PM PDT           40.59           1430         +              Normal
  04/26/2026 03 PM PDT           40.61           1437         +              Normal
  04/26/2026 04 PM PDT           40.62           1441         +              Normal
  04/26/2026 05 PM PDT           40.62           1441         0              Normal
  04/26/2026 06 PM PDT           40.63           1445         +              Normal
  04/26/2026 07 PM PDT           40.64           1449         +              Normal
  04/26/2026 08 PM PDT           40.65           1453         +              Normal
  04/26/2026 09 PM PDT           40.65           1453         0              Normal
  04/26/2026 10 PM PDT           40.66           1457         +              Normal
  04/26/2026 11 PM PDT           40.66           1457         0              Normal
  04/27/2026 12 AM PDT           40.66           1457         0              Normal
  04/27/2026 01 AM PDT           40.67           1461         +              Normal
  04/27/2026 02 AM PDT           40.67           1461         0              Normal
  04/27/2026 03 AM PDT           40.68           1465         +              Normal
  04/27/2026 04 AM PDT           40.68           1465         0              Normal
  04/27/2026 05 AM PDT           40.68           1465         0              Normal
  04/27/2026 06 AM PDT           40.68           1465         0              Normal
  04/27/2026 07 AM PDT           40.69           1469         +              Normal
  04/27/2026 08 AM PDT           40.69           1469         0              Normal
  04/27/2026 09 AM PDT           40.69           1469         0              Normal
  04/27/2026 10 AM PDT           40.69           1469         0              Normal
  04/27/2026 11 AM PDT           40.69           1469         0              Normal
  04/27/2026 12 PM PDT           40.70           1472         +              Normal
  04/27/2026 01 PM PDT           40.70           1472         0              Normal
  04/27/2026 02 PM PDT           40.70           1472         0              Normal
  04/27/2026 03 PM PDT           40.70           1472         0              Normal
  04/27/2026 04 PM PDT           40.70           1472         0              Normal
  04/27/2026 05 PM PDT           40.70           1472         0              Normal
  04/27/2026 06 PM PDT           40.70           1472         0              Normal
  04/27/2026 07 PM PDT           40.70           1472         0              Normal
  04/27/2026 08 PM PDT           40.70           1472         0              Normal
  04/27/2026 09 PM PDT           40.70           1472         0              Normal
  04/27/2026 10 PM PDT           40.70           1472         0              Normal
  04/27/2026 11 PM PDT           40.70           1472         0              Normal
  04/28/2026 12 AM PDT           40.70           1472         0              Normal
  04/28/2026 01 AM PDT           40.70           1472         0              Normal
  04/28/2026 02 AM PDT           40.70           1472         0              Normal
  04/28/2026 03 AM PDT           40.70           1472         0              Normal
  04/28/2026 04 AM PDT           40.70           1472         0              Normal
  04/28/2026 05 AM PDT           40.70           1472         0              Normal
  04/28/2026 06 AM PDT           40.70           1472         0              Normal
  04/28/2026 07 AM PDT           40.70           1472         0              Normal
  04/28/2026 08 AM PDT           40.70           1472         0              Normal
  04/28/2026 09 AM PDT           40.70           1472         0              Normal
  04/28/2026 10 AM PDT           40.70           1472         0              Normal
  04/28/2026 11 AM PDT           40.70           1472         0              Normal
  04/28/2026 12 PM PDT           40.70           1472         0              Normal
  04/28/2026 01 PM PDT           40.70           1472         0              Normal
  04/28/2026 02 PM PDT           40.70           1472         0              Normal
  04/28/2026 03 PM PDT           40.70           1472         0              Normal
  04/28/2026 04 PM PDT           40.70           1472         0              Normal
  04/28/2026 05 PM PDT           40.70           1472         0              Normal
  04/28/2026 06 PM PDT           40.70           1472         0              Normal
  04/28/2026 07 PM PDT           40.70           1472         0              Normal
  04/28/2026 08 PM PDT           40.70           1472         0              Normal
  04/28/2026 09 PM PDT           40.70           1472         0              Normal
  04/28/2026 10 PM PDT           40.70           1472         0              Normal
  04/28/2026 11 PM PDT           40.70           1472         0              Normal
  04/29/2026 12 AM PDT           40.70           1472         0              Normal
  04/29/2026 01 AM PDT           40.71           1476         +              Normal
  04/29/2026 02 AM PDT           40.71           1476         0              Normal
  04/29/2026 03 AM PDT           40.71           1476         0              Normal
  04/29/2026 04 AM PDT           40.71           1476         0              Normal
  04/29/2026 05 AM PDT           40.71           1476         0              Normal
  04/29/2026 06 AM PDT           40.71           1476         0              Normal
  04/29/2026 07 AM PDT           40.71           1476         0              Normal
  04/29/2026 08 AM PDT           40.71           1476         0              Normal
  04/29/2026 09 AM PDT           40.71           1476         0              Normal
  04/29/2026 10 AM PDT           40.71           1476         0              Normal
  04/29/2026 11 AM PDT           40.71           1476         0              Normal
  04/29/2026 12 PM PDT           40.71           1476         0              Normal
  04/29/2026 01 PM PDT           40.71           1476         0              Normal
  04/29/2026 02 PM PDT           40.71           1476         0              Normal
  04/29/2026 03 PM PDT           40.71           1476         0              Normal
  04/29/2026 04 PM PDT           40.71           1476         0              Normal
  04/29/2026 05 PM PDT           40.71           1476         0              Normal
  04/29/2026 06 PM PDT           40.71           1476         0              Normal
  04/29/2026 07 PM PDT           40.71           1476         0              Normal
  04/29/2026 08 PM PDT           40.71           1476         0              Normal
  04/29/2026 09 PM PDT           40.71           1476         0              Normal
  04/29/2026 10 PM PDT           40.71           1476         0              Normal
  04/29/2026 11 PM PDT           40.71           1476         0              Normal
  04/30/2026 12 AM PDT           40.71           1476         0              Normal
  04/30/2026 01 AM PDT           40.71           1476         0              Normal
  04/30/2026 02 AM PDT           40.71           1476         0              Normal
  04/30/2026 03 AM PDT           40.71           1476         0              Normal
  04/30/2026 04 AM PDT           40.71           1476         0              Normal
  04/30/2026 05 AM PDT           40.71           1476         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.