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TUOLUMNE RIVER - MODESTO (MDSC1)
| Latitude: 37.63º N | Longitude: 120.99º W | Elevation: 60 Feet | | Forecast Type: Official Location |
| Location: Stanislaus County in California | Bulletin Group: San Joaquin | River Group: San Joaquin |
| Issuance Time: | Oct 17 2026 at 7:06 AM PDT | Next Issuance: | Oct 18 2026 at 9:00 AM PDT
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| Action: 50.5 Feet | Minor Flood: 55.0 Feet | Moderate Flood: 66.0 Feet | Major Flood: 67.0 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Tuolumne River - Modesto (MDSC1)
#
# File Generation Time: 10/17/2026 at 07:06 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 10/17/2026 at 06:00 AM PDT
# Maximum Observed Stage: 39.50 Feet
# Maximum Observed Flow: 1027 cfs
#
# Earliest Date & Time of Maximum Forecast: 10/18/2026 at 11:00 AM PDT
# Maximum Forecast Stage: 41.06 Feet
# Maximum Forecast Flow: 1615 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
10/12/2026 07 AM PDT 37.05 235 Normal
10/12/2026 08 AM PDT 37.07 241 + Normal
10/12/2026 09 AM PDT 37.09 246 + Normal
10/12/2026 10 AM PDT 37.10 248 + Normal
10/12/2026 11 AM PDT 37.10 248 0 Normal
10/12/2026 12 PM PDT 37.08 243 - Normal
10/12/2026 01 PM PDT 37.07 241 - Normal
10/12/2026 02 PM PDT 37.06 238 - Normal
10/12/2026 03 PM PDT 37.05 235 - Normal
10/12/2026 04 PM PDT 37.04 233 - Normal
10/12/2026 05 PM PDT 37.03 230 - Normal
10/12/2026 06 PM PDT 37.02 228 - Normal
10/12/2026 07 PM PDT 37.01 225 - Normal
10/12/2026 08 PM PDT 37.01 225 0 Normal
10/12/2026 09 PM PDT 37.01 225 0 Normal
10/12/2026 10 PM PDT 37.02 228 + Normal
10/12/2026 11 PM PDT 37.03 230 + Normal
10/13/2026 12 AM PDT 37.03 230 0 Normal
10/13/2026 01 AM PDT 37.04 233 + Normal
10/13/2026 02 AM PDT 37.03 230 - Normal
10/13/2026 03 AM PDT 37.04 233 + Normal
10/13/2026 04 AM PDT 37.04 233 0 Normal
10/13/2026 05 AM PDT 37.06 238 + Normal
10/13/2026 06 AM PDT 37.07 241 + Normal
10/13/2026 07 AM PDT 37.07 241 0 Normal
10/13/2026 08 AM PDT 37.07 241 0 Normal
10/13/2026 09 AM PDT 37.07 241 0 Normal
10/13/2026 10 AM PDT 37.07 241 0 Normal
10/13/2026 11 AM PDT 37.07 241 0 Normal
10/13/2026 12 PM PDT 37.08 243 + Normal
10/13/2026 01 PM PDT 37.08 243 0 Normal
10/13/2026 02 PM PDT 37.08 243 0 Normal
10/13/2026 03 PM PDT 37.09 246 + Normal
10/13/2026 04 PM PDT 37.09 246 0 Normal
10/13/2026 05 PM PDT 37.09 246 0 Normal
10/13/2026 06 PM PDT 37.10 248 + Normal
10/13/2026 07 PM PDT 37.09 246 - Normal
10/13/2026 08 PM PDT 37.09 246 0 Normal
10/13/2026 09 PM PDT 37.08 243 - Normal
10/13/2026 10 PM PDT 37.07 241 - Normal
10/13/2026 11 PM PDT 37.06 238 - Normal
10/14/2026 12 AM PDT 37.05 235 - Normal
10/14/2026 01 AM PDT 37.03 230 - Normal
10/14/2026 02 AM PDT 37.03 230 0 Normal
10/14/2026 03 AM PDT 37.02 228 - Normal
10/14/2026 04 AM PDT 37.02 228 0 Normal
10/14/2026 05 AM PDT 37.01 225 - Normal
10/14/2026 06 AM PDT 37.01 225 0 Normal
10/14/2026 07 AM PDT 37.01 225 0 Normal
10/14/2026 08 AM PDT 37.00 223 - Normal
10/14/2026 09 AM PDT 37.01 225 + Normal
10/14/2026 10 AM PDT 37.01 225 0 Normal
10/14/2026 11 AM PDT 37.01 225 0 Normal
10/14/2026 12 PM PDT 37.01 225 0 Normal
10/14/2026 01 PM PDT 37.02 228 + Normal
10/14/2026 02 PM PDT 37.04 233 + Normal
10/14/2026 03 PM PDT 37.04 233 0 Normal
10/14/2026 04 PM PDT 37.04 233 0 Normal
10/14/2026 05 PM PDT 37.03 230 - Normal
10/14/2026 06 PM PDT 37.02 228 - Normal
10/14/2026 07 PM PDT 37.01 225 - Normal
10/14/2026 08 PM PDT 36.99 220 - Normal
10/14/2026 09 PM PDT 36.98 218 - Normal
10/14/2026 10 PM PDT 36.97 215 - Normal
10/14/2026 11 PM PDT 36.97 215 0 Normal
10/15/2026 12 AM PDT 36.97 215 0 Normal
10/15/2026 01 AM PDT 36.97 215 0 Normal
10/15/2026 02 AM PDT 36.97 215 0 Normal
10/15/2026 03 AM PDT 36.98 218 + Normal
10/15/2026 04 AM PDT 36.98 218 0 Normal
10/15/2026 05 AM PDT 36.99 220 + Normal
10/15/2026 06 AM PDT 36.99 220 0 Normal
10/15/2026 07 AM PDT 36.99 220 0 Normal
10/15/2026 08 AM PDT 36.99 220 0 Normal
10/15/2026 09 AM PDT 37.00 223 + Normal
10/15/2026 10 AM PDT 37.00 223 0 Normal
10/15/2026 11 AM PDT 37.01 225 + Normal
10/15/2026 12 PM PDT 37.01 225 0 Normal
10/15/2026 01 PM PDT 37.02 228 + Normal
10/15/2026 02 PM PDT 37.02 228 0 Normal
10/15/2026 03 PM PDT 37.02 228 0 Normal
10/15/2026 04 PM PDT 37.03 230 + Normal
10/15/2026 05 PM PDT 37.03 230 0 Normal
10/15/2026 06 PM PDT 37.04 233 + Normal
10/15/2026 07 PM PDT 37.04 233 0 Normal
10/15/2026 08 PM PDT 37.04 233 0 Normal
10/15/2026 09 PM PDT 37.06 238 + Normal
10/15/2026 10 PM PDT 37.08 243 + Normal
10/15/2026 11 PM PDT 37.11 251 + Normal
10/16/2026 12 AM PDT 37.17 267 + Normal
10/16/2026 01 AM PDT 37.23 283 + Normal
10/16/2026 02 AM PDT 37.31 304 + Normal
10/16/2026 03 AM PDT 37.38 324 + Normal
10/16/2026 04 AM PDT 37.47 349 + Normal
10/16/2026 05 AM PDT 37.56 375 + Normal
10/16/2026 06 AM PDT 37.64 399 + Normal
10/16/2026 07 AM PDT 37.72 423 + Normal
10/16/2026 08 AM PDT 37.79 444 + Normal
10/16/2026 09 AM PDT 37.86 466 + Normal
10/16/2026 10 AM PDT 37.92 485 + Normal
10/16/2026 11 AM PDT 37.97 500 + Normal
10/16/2026 12 PM PDT 38.03 520 + Normal
10/16/2026 01 PM PDT 38.06 529 + Normal
10/16/2026 02 PM PDT 38.11 545 + Normal
10/16/2026 03 PM PDT 38.15 558 + Normal
10/16/2026 04 PM PDT 38.21 578 + Normal
10/16/2026 05 PM PDT 38.27 598 + Normal
10/16/2026 06 PM PDT 38.36 628 + Normal
10/16/2026 07 PM PDT 38.47 666 + Normal
10/16/2026 08 PM PDT 38.57 701 + Normal
10/16/2026 09 PM PDT 38.67 736 + Normal
10/16/2026 10 PM PDT 38.77 772 + Normal
10/16/2026 11 PM PDT 38.89 815 + Normal
10/17/2026 12 AM PDT 39.00 856 + Normal
10/17/2026 01 AM PDT 39.09 886 + Normal
10/17/2026 02 AM PDT 39.20 923 + Normal
10/17/2026 03 AM PDT 39.31 961 + Normal
10/17/2026 04 AM PDT 39.40 992 + Normal
10/17/2026 05 AM PDT 39.46 1013 + Normal
10/17/2026 06 AM PDT 39.50 1027 + Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
10/17/2026 07 AM PDT 39.53 1038 Normal
10/17/2026 08 AM PDT 39.56 1048 + Normal
10/17/2026 09 AM PDT 39.59 1059 + Normal
10/17/2026 10 AM PDT 39.61 1066 + Normal
10/17/2026 11 AM PDT 39.64 1077 + Normal
10/17/2026 12 PM PDT 39.69 1094 + Normal
10/17/2026 01 PM PDT 39.77 1123 + Normal
10/17/2026 02 PM PDT 39.88 1163 + Normal
10/17/2026 03 PM PDT 40.02 1214 + Normal
10/17/2026 04 PM PDT 40.14 1259 + Normal
10/17/2026 05 PM PDT 40.25 1300 + Normal
10/17/2026 06 PM PDT 40.35 1338 + Normal
10/17/2026 07 PM PDT 40.44 1372 + Normal
10/17/2026 08 PM PDT 40.52 1403 + Normal
10/17/2026 09 PM PDT 40.59 1430 + Normal
10/17/2026 10 PM PDT 40.65 1453 + Normal
10/17/2026 11 PM PDT 40.71 1476 + Normal
10/18/2026 12 AM PDT 40.76 1496 + Normal
10/18/2026 01 AM PDT 40.81 1516 + Normal
10/18/2026 02 AM PDT 40.85 1531 + Normal
10/18/2026 03 AM PDT 40.88 1543 + Normal
10/18/2026 04 AM PDT 40.91 1555 + Normal
10/18/2026 05 AM PDT 40.94 1567 + Normal
10/18/2026 06 AM PDT 40.97 1579 + Normal
10/18/2026 07 AM PDT 40.99 1587 + Normal
10/18/2026 08 AM PDT 41.01 1595 + Normal
10/18/2026 09 AM PDT 41.03 1603 + Normal
10/18/2026 10 AM PDT 41.05 1611 + Normal
10/18/2026 11 AM PDT 41.06 1615 + Normal
10/18/2026 12 PM PDT 41.05 1611 - Normal
10/18/2026 01 PM PDT 41.00 1591 - Normal
10/18/2026 02 PM PDT 40.93 1563 - Normal
10/18/2026 03 PM PDT 40.84 1527 - Normal
10/18/2026 04 PM PDT 40.75 1492 - Normal
10/18/2026 05 PM PDT 40.67 1461 - Normal
10/18/2026 06 PM PDT 40.59 1430 - Normal
10/18/2026 07 PM PDT 40.52 1403 - Normal
10/18/2026 08 PM PDT 40.46 1380 - Normal
10/18/2026 09 PM PDT 40.41 1361 - Normal
10/18/2026 10 PM PDT 40.36 1342 - Normal
10/18/2026 11 PM PDT 40.31 1323 - Normal
10/19/2026 12 AM PDT 40.27 1308 - Normal
10/19/2026 01 AM PDT 40.24 1296 - Normal
10/19/2026 02 AM PDT 40.21 1285 - Normal
10/19/2026 03 AM PDT 40.18 1274 - Normal
10/19/2026 04 AM PDT 40.15 1263 - Normal
10/19/2026 05 AM PDT 40.13 1255 - Normal
10/19/2026 06 AM PDT 40.11 1248 - Normal
10/19/2026 07 AM PDT 40.09 1240 - Normal
10/19/2026 08 AM PDT 40.08 1237 - Normal
10/19/2026 09 AM PDT 40.06 1229 - Normal
10/19/2026 10 AM PDT 40.05 1225 - Normal
10/19/2026 11 AM PDT 40.03 1218 - Normal
10/19/2026 12 PM PDT 40.00 1207 - Normal
10/19/2026 01 PM PDT 39.94 1185 - Normal
10/19/2026 02 PM PDT 39.86 1156 - Normal
10/19/2026 03 PM PDT 39.77 1123 - Normal
10/19/2026 04 PM PDT 39.68 1091 - Normal
10/19/2026 05 PM PDT 39.59 1059 - Normal
10/19/2026 06 PM PDT 39.50 1027 - Normal
10/19/2026 07 PM PDT 39.42 999 - Normal
10/19/2026 08 PM PDT 39.35 975 - Normal
10/19/2026 09 PM PDT 39.28 950 - Normal
10/19/2026 10 PM PDT 39.23 933 - Normal
10/19/2026 11 PM PDT 39.17 913 - Normal
10/20/2026 12 AM PDT 39.13 899 - Normal
10/20/2026 01 AM PDT 39.09 886 - Normal
10/20/2026 02 AM PDT 39.05 872 - Normal
10/20/2026 03 AM PDT 39.01 859 - Normal
10/20/2026 04 AM PDT 38.98 848 - Normal
10/20/2026 05 AM PDT 38.96 841 - Normal
10/20/2026 06 AM PDT 38.94 833 - Normal
10/20/2026 07 AM PDT 38.92 826 - Normal
10/20/2026 08 AM PDT 38.90 819 - Normal
10/20/2026 09 AM PDT 38.89 815 - Normal
10/20/2026 10 AM PDT 38.87 808 - Normal
10/20/2026 11 AM PDT 38.86 804 - Normal
10/20/2026 12 PM PDT 38.85 801 - Normal
10/20/2026 01 PM PDT 38.83 793 - Normal
10/20/2026 02 PM PDT 38.80 782 - Normal
10/20/2026 03 PM PDT 38.75 765 - Normal
10/20/2026 04 PM PDT 38.70 747 - Normal
10/20/2026 05 PM PDT 38.64 725 - Normal
10/20/2026 06 PM PDT 38.58 704 - Normal
10/20/2026 07 PM PDT 38.52 683 - Normal
10/20/2026 08 PM PDT 38.46 663 - Normal
10/20/2026 09 PM PDT 38.41 645 - Normal
10/20/2026 10 PM PDT 38.37 632 - Normal
10/20/2026 11 PM PDT 38.33 618 - Normal
10/21/2026 12 AM PDT 38.30 608 - Normal
10/21/2026 01 AM PDT 38.26 595 - Normal
10/21/2026 02 AM PDT 38.23 585 - Normal
10/21/2026 03 AM PDT 38.21 578 - Normal
10/21/2026 04 AM PDT 38.19 572 - Normal
10/21/2026 05 AM PDT 38.17 565 - Normal
10/21/2026 06 AM PDT 38.15 558 - Normal
10/21/2026 07 AM PDT 38.13 552 - Normal
10/21/2026 08 AM PDT 38.12 549 - Normal
10/21/2026 09 AM PDT 38.10 542 - Normal
10/21/2026 10 AM PDT 38.09 539 - Normal
10/21/2026 11 AM PDT 38.08 536 - Normal
10/21/2026 12 PM PDT 38.07 532 - Normal
10/21/2026 01 PM PDT 38.06 529 - Normal
10/21/2026 02 PM PDT 38.05 526 - Normal
10/21/2026 03 PM PDT 38.05 526 0 Normal
10/21/2026 04 PM PDT 38.05 526 0 Normal
10/21/2026 05 PM PDT 38.10 542 + Normal
10/21/2026 06 PM PDT 38.17 565 + Normal
10/21/2026 07 PM PDT 38.24 588 + Normal
10/21/2026 08 PM PDT 38.30 608 + Normal
10/21/2026 09 PM PDT 38.34 622 + Normal
10/21/2026 10 PM PDT 38.39 639 + Normal
10/21/2026 11 PM PDT 38.43 652 + Normal
10/22/2026 12 AM PDT 38.46 663 + Normal
10/22/2026 01 AM PDT 38.50 676 + Normal
10/22/2026 02 AM PDT 38.52 683 + Normal
10/22/2026 03 AM PDT 38.55 694 + Normal
10/22/2026 04 AM PDT 38.57 701 + Normal
10/22/2026 05 AM PDT 38.59 708 + 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.
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