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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: | May 08 2026 at 8:57 AM PDT | Next Issuance: | May 09 2026 at 9:00 AM PDT
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| Action/Monitor: 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: 05/08/2026 at 08:57 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 05/03/2026 at 01:00 PM PDT
# Maximum Observed Stage: 37.82 Feet
# Maximum Observed Flow: 460 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/08/2026 at 09:00 AM PDT
# Maximum Forecast Stage: 37.01 Feet
# Maximum Forecast Flow: 234 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
05/03/2026 08 AM PDT 37.80 454 Normal
05/03/2026 09 AM PDT 37.81 457 + Normal
05/03/2026 10 AM PDT 37.82 460 + Normal
05/03/2026 11 AM PDT 37.82 460 0 Normal
05/03/2026 12 PM PDT 37.82 460 0 Normal
05/03/2026 01 PM PDT 37.82 460 0 Normal
05/03/2026 02 PM PDT 37.81 457 - Normal
05/03/2026 03 PM PDT 37.80 454 - Normal
05/03/2026 04 PM PDT 37.79 451 - Normal
05/03/2026 05 PM PDT 37.78 448 - Normal
05/03/2026 06 PM PDT 37.78 448 0 Normal
05/03/2026 07 PM PDT 37.77 444 - Normal
05/03/2026 08 PM PDT 37.77 444 0 Normal
05/03/2026 09 PM PDT 37.76 441 - Normal
05/03/2026 10 PM PDT 37.75 438 - Normal
05/03/2026 11 PM PDT 37.73 432 - Normal
05/04/2026 12 AM PDT 37.71 427 - Normal
05/04/2026 01 AM PDT 37.70 424 - Normal
05/04/2026 02 AM PDT 37.69 421 - Normal
05/04/2026 03 AM PDT 37.68 418 - Normal
05/04/2026 04 AM PDT 37.67 415 - Normal
05/04/2026 05 AM PDT 37.66 412 - Normal
05/04/2026 06 AM PDT 37.64 406 - Normal
05/04/2026 07 AM PDT 37.64 406 0 Normal
05/04/2026 08 AM PDT 37.63 403 - Normal
05/04/2026 09 AM PDT 37.62 400 - Normal
05/04/2026 10 AM PDT 37.62 400 0 Normal
05/04/2026 11 AM PDT 37.62 400 0 Normal
05/04/2026 12 PM PDT 37.62 400 0 Normal
05/04/2026 01 PM PDT 37.62 400 0 Normal
05/04/2026 02 PM PDT 37.63 403 + Normal
05/04/2026 03 PM PDT 37.63 403 0 Normal
05/04/2026 04 PM PDT 37.63 403 0 Normal
05/04/2026 05 PM PDT 37.63 403 0 Normal
05/04/2026 06 PM PDT 37.64 406 + Normal
05/04/2026 07 PM PDT 37.63 403 - Normal
05/04/2026 08 PM PDT 37.64 406 + Normal
05/04/2026 09 PM PDT 37.62 400 - Normal
05/04/2026 10 PM PDT 37.62 400 0 Normal
05/04/2026 11 PM PDT 37.61 397 - Normal
05/05/2026 12 AM PDT 37.59 391 - Normal
05/05/2026 01 AM PDT 37.57 385 - Normal
05/05/2026 02 AM PDT 37.55 380 - Normal
05/05/2026 03 AM PDT 37.55 380 0 Normal
05/05/2026 04 AM PDT 37.53 374 - Normal
05/05/2026 05 AM PDT 37.52 371 - Normal
05/05/2026 06 AM PDT 37.51 368 - Normal
05/05/2026 07 AM PDT 37.50 365 - Normal
05/05/2026 08 AM PDT 37.49 362 - Normal
05/05/2026 09 AM PDT 37.49 362 0 Normal
05/05/2026 10 AM PDT 37.48 360 - Normal
05/05/2026 11 AM PDT 37.48 360 0 Normal
05/05/2026 12 PM PDT 37.47 357 - Normal
05/05/2026 01 PM PDT 37.47 357 0 Normal
05/05/2026 02 PM PDT 37.47 357 0 Normal
05/05/2026 03 PM PDT 37.47 357 0 Normal
05/05/2026 04 PM PDT 37.46 354 - Normal
05/05/2026 05 PM PDT 37.46 354 0 Normal
05/05/2026 06 PM PDT 37.44 348 - Normal
05/05/2026 07 PM PDT 37.43 345 - Normal
05/05/2026 08 PM PDT 37.44 348 + Normal
05/05/2026 09 PM PDT 37.43 345 - Normal
05/05/2026 10 PM PDT 37.43 345 0 Normal
05/05/2026 11 PM PDT 37.45 351 + Normal
05/06/2026 12 AM PDT 37.43 345 - Normal
05/06/2026 01 AM PDT 37.41 340 - Normal
05/06/2026 02 AM PDT 37.40 337 - Normal
05/06/2026 03 AM PDT 37.40 337 0 Normal
05/06/2026 04 AM PDT 37.40 337 0 Normal
05/06/2026 05 AM PDT 37.39 334 - Normal
05/06/2026 06 AM PDT 37.37 329 - Normal
05/06/2026 07 AM PDT 37.35 323 - Normal
05/06/2026 08 AM PDT 37.34 321 - Normal
05/06/2026 09 AM PDT 37.32 315 - Normal
05/06/2026 10 AM PDT 37.30 310 - Normal
05/06/2026 11 AM PDT 37.30 310 0 Normal
05/06/2026 12 PM PDT 37.29 307 - Normal
05/06/2026 01 PM PDT 37.28 304 - Normal
05/06/2026 02 PM PDT 37.28 304 0 Normal
05/06/2026 03 PM PDT 37.27 301 - Normal
05/06/2026 04 PM PDT 37.27 301 0 Normal
05/06/2026 05 PM PDT 37.27 301 0 Normal
05/06/2026 06 PM PDT 37.26 299 - Normal
05/06/2026 07 PM PDT 37.26 299 0 Normal
05/06/2026 08 PM PDT 37.25 296 - Normal
05/06/2026 09 PM PDT 37.24 293 - Normal
05/06/2026 10 PM PDT 37.23 291 - Normal
05/06/2026 11 PM PDT 37.23 291 0 Normal
05/07/2026 12 AM PDT 37.23 291 0 Normal
05/07/2026 01 AM PDT 37.22 288 - Normal
05/07/2026 02 AM PDT 37.21 285 - Normal
05/07/2026 03 AM PDT 37.20 283 - Normal
05/07/2026 04 AM PDT 37.19 280 - Normal
05/07/2026 05 AM PDT 37.18 277 - Normal
05/07/2026 06 AM PDT 37.17 275 - Normal
05/07/2026 07 AM PDT 37.16 272 - Normal
05/07/2026 08 AM PDT 37.15 270 - Normal
05/07/2026 09 AM PDT 37.14 267 - Normal
05/07/2026 10 AM PDT 37.13 264 - Normal
05/07/2026 11 AM PDT 37.14 267 + Normal
05/07/2026 12 PM PDT 37.12 262 - Normal
05/07/2026 01 PM PDT 37.12 262 0 Normal
05/07/2026 02 PM PDT 37.11 259 - Normal
05/07/2026 03 PM PDT 37.11 259 0 Normal
05/07/2026 04 PM PDT 37.12 262 + Normal
05/07/2026 05 PM PDT 37.12 262 0 Normal
05/07/2026 06 PM PDT 37.14 267 + Normal
05/07/2026 07 PM PDT 37.12 262 - Normal
05/07/2026 08 PM PDT 37.11 259 - Normal
05/07/2026 09 PM PDT 37.09 254 - Normal
05/07/2026 10 PM PDT 37.08 251 - Normal
05/07/2026 11 PM PDT 37.06 246 - Normal
05/08/2026 12 AM PDT 37.05 244 - Normal
05/08/2026 01 AM PDT 37.04 241 - Normal
05/08/2026 02 AM PDT 37.03 239 - Normal
05/08/2026 03 AM PDT 37.02 236 - Normal
05/08/2026 04 AM PDT 37.02 236 0 Normal
05/08/2026 05 AM PDT 37.01 234 - Normal
05/08/2026 06 AM PDT 37.00 231 - Normal
05/08/2026 07 AM PDT 37.01 234 + Normal
05/08/2026 08 AM PDT 37.01 234 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/08/2026 09 AM PDT 37.01 234 Normal
05/08/2026 10 AM PDT 37.00 231 - Normal
05/08/2026 11 AM PDT 37.00 231 0 Normal
05/08/2026 12 PM PDT 37.00 231 0 Normal
05/08/2026 01 PM PDT 37.01 234 + Normal
05/08/2026 02 PM PDT 37.01 234 0 Normal
05/08/2026 03 PM PDT 37.00 231 - Normal
05/08/2026 04 PM PDT 37.00 231 0 Normal
05/08/2026 05 PM PDT 37.00 231 0 Normal
05/08/2026 06 PM PDT 37.00 231 0 Normal
05/08/2026 07 PM PDT 36.99 229 - Normal
05/08/2026 08 PM PDT 36.98 226 - Normal
05/08/2026 09 PM PDT 36.97 224 - Normal
05/08/2026 10 PM PDT 36.96 221 - Normal
05/08/2026 11 PM PDT 36.95 219 - Normal
05/09/2026 12 AM PDT 36.94 216 - Normal
05/09/2026 01 AM PDT 36.93 214 - Normal
05/09/2026 02 AM PDT 36.92 212 - Normal
05/09/2026 03 AM PDT 36.92 212 0 Normal
05/09/2026 04 AM PDT 36.91 209 - Normal
05/09/2026 05 AM PDT 36.91 209 0 Normal
05/09/2026 06 AM PDT 36.90 207 - Normal
05/09/2026 07 AM PDT 36.90 207 0 Normal
05/09/2026 08 AM PDT 36.90 207 0 Normal
05/09/2026 09 AM PDT 36.89 204 - Normal
05/09/2026 10 AM PDT 36.89 204 0 Normal
05/09/2026 11 AM PDT 36.89 204 0 Normal
05/09/2026 12 PM PDT 36.89 204 0 Normal
05/09/2026 01 PM PDT 36.88 202 - Normal
05/09/2026 02 PM PDT 36.88 202 0 Normal
05/09/2026 03 PM PDT 36.88 202 0 Normal
05/09/2026 04 PM PDT 36.88 202 0 Normal
05/09/2026 05 PM PDT 36.88 202 0 Normal
05/09/2026 06 PM PDT 36.88 202 0 Normal
05/09/2026 07 PM PDT 36.88 202 0 Normal
05/09/2026 08 PM PDT 36.88 202 0 Normal
05/09/2026 09 PM PDT 36.88 202 0 Normal
05/09/2026 10 PM PDT 36.88 202 0 Normal
05/09/2026 11 PM PDT 36.88 202 0 Normal
05/10/2026 12 AM PDT 36.88 202 0 Normal
05/10/2026 01 AM PDT 36.88 202 0 Normal
05/10/2026 02 AM PDT 36.88 202 0 Normal
05/10/2026 03 AM PDT 36.88 202 0 Normal
05/10/2026 04 AM PDT 36.87 199 - Normal
05/10/2026 05 AM PDT 36.87 199 0 Normal
05/10/2026 06 AM PDT 36.87 199 0 Normal
05/10/2026 07 AM PDT 36.87 199 0 Normal
05/10/2026 08 AM PDT 36.87 199 0 Normal
05/10/2026 09 AM PDT 36.87 199 0 Normal
05/10/2026 10 AM PDT 36.87 199 0 Normal
05/10/2026 11 AM PDT 36.87 199 0 Normal
05/10/2026 12 PM PDT 36.87 199 0 Normal
05/10/2026 01 PM PDT 36.87 199 0 Normal
05/10/2026 02 PM PDT 36.87 199 0 Normal
05/10/2026 03 PM PDT 36.87 199 0 Normal
05/10/2026 04 PM PDT 36.87 199 0 Normal
05/10/2026 05 PM PDT 36.87 199 0 Normal
05/10/2026 06 PM PDT 36.87 199 0 Normal
05/10/2026 07 PM PDT 36.87 199 0 Normal
05/10/2026 08 PM PDT 36.87 199 0 Normal
05/10/2026 09 PM PDT 36.88 202 + Normal
05/10/2026 10 PM PDT 36.88 202 0 Normal
05/10/2026 11 PM PDT 36.88 202 0 Normal
05/11/2026 12 AM PDT 36.88 202 0 Normal
05/11/2026 01 AM PDT 36.88 202 0 Normal
05/11/2026 02 AM PDT 36.88 202 0 Normal
05/11/2026 03 AM PDT 36.88 202 0 Normal
05/11/2026 04 AM PDT 36.88 202 0 Normal
05/11/2026 05 AM PDT 36.88 202 0 Normal
05/11/2026 06 AM PDT 36.88 202 0 Normal
05/11/2026 07 AM PDT 36.88 202 0 Normal
05/11/2026 08 AM PDT 36.88 202 0 Normal
05/11/2026 09 AM PDT 36.88 202 0 Normal
05/11/2026 10 AM PDT 36.88 202 0 Normal
05/11/2026 11 AM PDT 36.88 202 0 Normal
05/11/2026 12 PM PDT 36.88 202 0 Normal
05/11/2026 01 PM PDT 36.88 202 0 Normal
05/11/2026 02 PM PDT 36.88 202 0 Normal
05/11/2026 03 PM PDT 36.88 202 0 Normal
05/11/2026 04 PM PDT 36.88 202 0 Normal
05/11/2026 05 PM PDT 36.88 202 0 Normal
05/11/2026 06 PM PDT 36.88 202 0 Normal
05/11/2026 07 PM PDT 36.88 202 0 Normal
05/11/2026 08 PM PDT 36.88 202 0 Normal
05/11/2026 09 PM PDT 36.88 202 0 Normal
05/11/2026 10 PM PDT 36.88 202 0 Normal
05/11/2026 11 PM PDT 36.88 202 0 Normal
05/12/2026 12 AM PDT 36.88 202 0 Normal
05/12/2026 01 AM PDT 36.88 202 0 Normal
05/12/2026 02 AM PDT 36.88 202 0 Normal
05/12/2026 03 AM PDT 36.88 202 0 Normal
05/12/2026 04 AM PDT 36.88 202 0 Normal
05/12/2026 05 AM PDT 36.88 202 0 Normal
05/12/2026 06 AM PDT 36.88 202 0 Normal
05/12/2026 07 AM PDT 36.88 202 0 Normal
05/12/2026 08 AM PDT 36.88 202 0 Normal
05/12/2026 09 AM PDT 36.88 202 0 Normal
05/12/2026 10 AM PDT 36.88 202 0 Normal
05/12/2026 11 AM PDT 36.88 202 0 Normal
05/12/2026 12 PM PDT 36.88 202 0 Normal
05/12/2026 01 PM PDT 36.88 202 0 Normal
05/12/2026 02 PM PDT 36.88 202 0 Normal
05/12/2026 03 PM PDT 36.88 202 0 Normal
05/12/2026 04 PM PDT 36.88 202 0 Normal
05/12/2026 05 PM PDT 36.88 202 0 Normal
05/12/2026 06 PM PDT 36.88 202 0 Normal
05/12/2026 07 PM PDT 36.88 202 0 Normal
05/12/2026 08 PM PDT 36.89 204 + Normal
05/12/2026 09 PM PDT 36.89 204 0 Normal
05/12/2026 10 PM PDT 36.89 204 0 Normal
05/12/2026 11 PM PDT 36.89 204 0 Normal
05/13/2026 12 AM PDT 36.89 204 0 Normal
05/13/2026 01 AM PDT 36.89 204 0 Normal
05/13/2026 02 AM PDT 36.89 204 0 Normal
05/13/2026 03 AM PDT 36.89 204 0 Normal
05/13/2026 04 AM PDT 36.89 204 0 Normal
05/13/2026 05 AM PDT 36.89 204 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.
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