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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 13 2026 at 8:35 AM PDT | Next Issuance: | May 14 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: 05/13/2026 at 08:35 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 05/08/2026 at 10:00 AM PDT
# Maximum Observed Stage: 37.00 Feet
# Maximum Observed Flow: 231 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/15/2026 at 09:00 PM PDT
# Maximum Forecast Stage: 36.84 Feet
# Maximum Forecast Flow: 192 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
05/08/2026 08 AM PDT 37.00 231 Normal
05/08/2026 09 AM PDT 37.00 231 0 Normal
05/08/2026 10 AM PDT 37.00 231 0 Normal
05/08/2026 11 AM PDT 36.99 229 - Normal
05/08/2026 12 PM PDT 36.99 229 0 Normal
05/08/2026 01 PM PDT 36.99 229 0 Normal
05/08/2026 02 PM PDT 36.98 226 - Normal
05/08/2026 03 PM PDT 36.98 226 0 Normal
05/08/2026 04 PM PDT 36.98 226 0 Normal
05/08/2026 05 PM PDT 36.97 224 - Normal
05/08/2026 06 PM PDT 36.97 224 0 Normal
05/08/2026 07 PM PDT 36.97 224 0 Normal
05/08/2026 08 PM PDT 36.97 224 0 Normal
05/08/2026 09 PM PDT 36.96 221 - Normal
05/08/2026 10 PM PDT 36.96 221 0 Normal
05/08/2026 11 PM PDT 36.97 224 + Normal
05/09/2026 12 AM PDT 36.97 224 0 Normal
05/09/2026 01 AM PDT 36.97 224 0 Normal
05/09/2026 02 AM PDT 36.96 221 - Normal
05/09/2026 03 AM PDT 36.95 219 - Normal
05/09/2026 04 AM PDT 36.95 219 0 Normal
05/09/2026 05 AM PDT 36.96 221 + Normal
05/09/2026 06 AM PDT 36.95 219 - Normal
05/09/2026 07 AM PDT 36.96 221 + Normal
05/09/2026 08 AM PDT 36.96 221 0 Normal
05/09/2026 09 AM PDT 36.97 224 + Normal
05/09/2026 10 AM PDT 36.96 221 - Normal
05/09/2026 11 AM PDT 36.97 224 + Normal
05/09/2026 12 PM PDT 36.97 224 0 Normal
05/09/2026 01 PM PDT 36.96 221 - Normal
05/09/2026 02 PM PDT 36.95 219 - Normal
05/09/2026 03 PM PDT 36.95 219 0 Normal
05/09/2026 04 PM PDT 36.94 216 - Normal
05/09/2026 05 PM PDT 36.94 216 0 Normal
05/09/2026 06 PM PDT 36.94 216 0 Normal
05/09/2026 07 PM PDT 36.93 214 - Normal
05/09/2026 08 PM PDT 36.93 214 0 Normal
05/09/2026 09 PM PDT 36.93 214 0 Normal
05/09/2026 10 PM PDT 36.93 214 0 Normal
05/09/2026 11 PM PDT 36.92 212 - Normal
05/10/2026 12 AM PDT 36.91 209 - Normal
05/10/2026 01 AM PDT 36.91 209 0 Normal
05/10/2026 02 AM PDT 36.90 207 - Normal
05/10/2026 03 AM PDT 36.89 204 - Normal
05/10/2026 04 AM PDT 36.89 204 0 Normal
05/10/2026 05 AM PDT 36.89 204 0 Normal
05/10/2026 06 AM PDT 36.89 204 0 Normal
05/10/2026 07 AM PDT 36.88 202 - Normal
05/10/2026 08 AM PDT 36.88 202 0 Normal
05/10/2026 09 AM PDT 36.89 204 + Normal
05/10/2026 10 AM PDT 36.89 204 0 Normal
05/10/2026 11 AM PDT 36.89 204 0 Normal
05/10/2026 12 PM PDT 36.89 204 0 Normal
05/10/2026 01 PM PDT 36.89 204 0 Normal
05/10/2026 02 PM PDT 36.88 202 - Normal
05/10/2026 03 PM PDT 36.88 202 0 Normal
05/10/2026 04 PM PDT 36.88 202 0 Normal
05/10/2026 05 PM PDT 36.88 202 0 Normal
05/10/2026 06 PM PDT 36.87 199 - 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 36.86 197 - Normal
05/10/2026 10 PM PDT 36.85 195 - Normal
05/10/2026 11 PM PDT 36.85 195 0 Normal
05/11/2026 12 AM PDT 36.84 192 - Normal
05/11/2026 01 AM PDT 36.84 192 0 Normal
05/11/2026 02 AM PDT 36.86 197 + Normal
05/11/2026 03 AM PDT 36.88 202 + Normal
05/11/2026 04 AM PDT 36.88 202 0 Normal
05/11/2026 05 AM PDT 36.87 199 - Normal
05/11/2026 06 AM PDT 36.88 202 + Normal
05/11/2026 07 AM PDT 36.87 199 - Normal
05/11/2026 08 AM PDT 36.87 199 0 Normal
05/11/2026 09 AM PDT 36.86 197 - Normal
05/11/2026 10 AM PDT 36.86 197 0 Normal
05/11/2026 11 AM PDT 36.86 197 0 Normal
05/11/2026 12 PM PDT 36.87 199 + Normal
05/11/2026 01 PM PDT 36.87 199 0 Normal
05/11/2026 02 PM PDT 36.86 197 - Normal
05/11/2026 03 PM PDT 36.86 197 0 Normal
05/11/2026 04 PM PDT 36.85 195 - Normal
05/11/2026 05 PM PDT 36.84 192 - Normal
05/11/2026 06 PM PDT 36.83 190 - Normal
05/11/2026 07 PM PDT 36.83 190 0 Normal
05/11/2026 08 PM PDT 36.83 190 0 Normal
05/11/2026 09 PM PDT 36.83 190 0 Normal
05/11/2026 10 PM PDT 36.83 190 0 Normal
05/11/2026 11 PM PDT 36.84 192 + Normal
05/12/2026 12 AM PDT 36.84 192 0 Normal
05/12/2026 01 AM PDT 36.85 195 + Normal
05/12/2026 02 AM PDT 36.85 195 0 Normal
05/12/2026 03 AM PDT 36.84 192 - Normal
05/12/2026 04 AM PDT 36.84 192 0 Normal
05/12/2026 05 AM PDT 36.84 192 0 Normal
05/12/2026 06 AM PDT 36.84 192 0 Normal
05/12/2026 07 AM PDT 36.84 192 0 Normal
05/12/2026 08 AM PDT 36.85 195 + Normal
05/12/2026 09 AM PDT 36.85 195 0 Normal
05/12/2026 10 AM PDT 36.85 195 0 Normal
05/12/2026 11 AM PDT 36.85 195 0 Normal
05/12/2026 12 PM PDT 36.85 195 0 Normal
05/12/2026 01 PM PDT 36.84 192 - Normal
05/12/2026 02 PM PDT 36.84 192 0 Normal
05/12/2026 03 PM PDT 36.84 192 0 Normal
05/12/2026 04 PM PDT 36.84 192 0 Normal
05/12/2026 05 PM PDT 36.84 192 0 Normal
05/12/2026 06 PM PDT 36.83 190 - Normal
05/12/2026 07 PM PDT 36.82 188 - Normal
05/12/2026 08 PM PDT 36.81 185 - Normal
05/12/2026 09 PM PDT 36.81 185 0 Normal
05/12/2026 10 PM PDT 36.81 185 0 Normal
05/12/2026 11 PM PDT 36.81 185 0 Normal
05/13/2026 12 AM PDT 36.81 185 0 Normal
05/13/2026 01 AM PDT 36.81 185 0 Normal
05/13/2026 02 AM PDT 36.81 185 0 Normal
05/13/2026 03 AM PDT 36.82 188 + Normal
05/13/2026 04 AM PDT 36.82 188 0 Normal
05/13/2026 05 AM PDT 36.82 188 0 Normal
05/13/2026 06 AM PDT 36.82 188 0 Normal
05/13/2026 07 AM PDT 36.82 188 0 Normal
05/13/2026 08 AM PDT 36.82 188 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/13/2026 09 AM PDT 36.82 188 Normal
05/13/2026 10 AM PDT 36.82 188 0 Normal
05/13/2026 11 AM PDT 36.82 188 0 Normal
05/13/2026 12 PM PDT 36.82 188 0 Normal
05/13/2026 01 PM PDT 36.82 188 0 Normal
05/13/2026 02 PM PDT 36.82 188 0 Normal
05/13/2026 03 PM PDT 36.82 188 0 Normal
05/13/2026 04 PM PDT 36.82 188 0 Normal
05/13/2026 05 PM PDT 36.82 188 0 Normal
05/13/2026 06 PM PDT 36.82 188 0 Normal
05/13/2026 07 PM PDT 36.82 188 0 Normal
05/13/2026 08 PM PDT 36.82 188 0 Normal
05/13/2026 09 PM PDT 36.82 188 0 Normal
05/13/2026 10 PM PDT 36.82 188 0 Normal
05/13/2026 11 PM PDT 36.83 190 + Normal
05/14/2026 12 AM PDT 36.83 190 0 Normal
05/14/2026 01 AM PDT 36.83 190 0 Normal
05/14/2026 02 AM PDT 36.83 190 0 Normal
05/14/2026 03 AM PDT 36.83 190 0 Normal
05/14/2026 04 AM PDT 36.83 190 0 Normal
05/14/2026 05 AM PDT 36.83 190 0 Normal
05/14/2026 06 AM PDT 36.83 190 0 Normal
05/14/2026 07 AM PDT 36.83 190 0 Normal
05/14/2026 08 AM PDT 36.83 190 0 Normal
05/14/2026 09 AM PDT 36.83 190 0 Normal
05/14/2026 10 AM PDT 36.83 190 0 Normal
05/14/2026 11 AM PDT 36.83 190 0 Normal
05/14/2026 12 PM PDT 36.83 190 0 Normal
05/14/2026 01 PM PDT 36.83 190 0 Normal
05/14/2026 02 PM PDT 36.83 190 0 Normal
05/14/2026 03 PM PDT 36.83 190 0 Normal
05/14/2026 04 PM PDT 36.83 190 0 Normal
05/14/2026 05 PM PDT 36.83 190 0 Normal
05/14/2026 06 PM PDT 36.83 190 0 Normal
05/14/2026 07 PM PDT 36.83 190 0 Normal
05/14/2026 08 PM PDT 36.83 190 0 Normal
05/14/2026 09 PM PDT 36.83 190 0 Normal
05/14/2026 10 PM PDT 36.83 190 0 Normal
05/14/2026 11 PM PDT 36.83 190 0 Normal
05/15/2026 12 AM PDT 36.83 190 0 Normal
05/15/2026 01 AM PDT 36.83 190 0 Normal
05/15/2026 02 AM PDT 36.83 190 0 Normal
05/15/2026 03 AM PDT 36.83 190 0 Normal
05/15/2026 04 AM PDT 36.83 190 0 Normal
05/15/2026 05 AM PDT 36.83 190 0 Normal
05/15/2026 06 AM PDT 36.83 190 0 Normal
05/15/2026 07 AM PDT 36.83 190 0 Normal
05/15/2026 08 AM PDT 36.83 190 0 Normal
05/15/2026 09 AM PDT 36.83 190 0 Normal
05/15/2026 10 AM PDT 36.83 190 0 Normal
05/15/2026 11 AM PDT 36.83 190 0 Normal
05/15/2026 12 PM PDT 36.83 190 0 Normal
05/15/2026 01 PM PDT 36.83 190 0 Normal
05/15/2026 02 PM PDT 36.83 190 0 Normal
05/15/2026 03 PM PDT 36.83 190 0 Normal
05/15/2026 04 PM PDT 36.83 190 0 Normal
05/15/2026 05 PM PDT 36.83 190 0 Normal
05/15/2026 06 PM PDT 36.83 190 0 Normal
05/15/2026 07 PM PDT 36.83 190 0 Normal
05/15/2026 08 PM PDT 36.83 190 0 Normal
05/15/2026 09 PM PDT 36.84 192 + Normal
05/15/2026 10 PM PDT 36.84 192 0 Normal
05/15/2026 11 PM PDT 36.84 192 0 Normal
05/16/2026 12 AM PDT 36.84 192 0 Normal
05/16/2026 01 AM PDT 36.84 192 0 Normal
05/16/2026 02 AM PDT 36.84 192 0 Normal
05/16/2026 03 AM PDT 36.84 192 0 Normal
05/16/2026 04 AM PDT 36.84 192 0 Normal
05/16/2026 05 AM PDT 36.84 192 0 Normal
05/16/2026 06 AM PDT 36.84 192 0 Normal
05/16/2026 07 AM PDT 36.84 192 0 Normal
05/16/2026 08 AM PDT 36.84 192 0 Normal
05/16/2026 09 AM PDT 36.84 192 0 Normal
05/16/2026 10 AM PDT 36.84 192 0 Normal
05/16/2026 11 AM PDT 36.84 192 0 Normal
05/16/2026 12 PM PDT 36.84 192 0 Normal
05/16/2026 01 PM PDT 36.84 192 0 Normal
05/16/2026 02 PM PDT 36.84 192 0 Normal
05/16/2026 03 PM PDT 36.84 192 0 Normal
05/16/2026 04 PM PDT 36.84 192 0 Normal
05/16/2026 05 PM PDT 36.84 192 0 Normal
05/16/2026 06 PM PDT 36.84 192 0 Normal
05/16/2026 07 PM PDT 36.84 192 0 Normal
05/16/2026 08 PM PDT 36.84 192 0 Normal
05/16/2026 09 PM PDT 36.84 192 0 Normal
05/16/2026 10 PM PDT 36.84 192 0 Normal
05/16/2026 11 PM PDT 36.84 192 0 Normal
05/17/2026 12 AM PDT 36.84 192 0 Normal
05/17/2026 01 AM PDT 36.84 192 0 Normal
05/17/2026 02 AM PDT 36.84 192 0 Normal
05/17/2026 03 AM PDT 36.84 192 0 Normal
05/17/2026 04 AM PDT 36.84 192 0 Normal
05/17/2026 05 AM PDT 36.84 192 0 Normal
05/17/2026 06 AM PDT 36.84 192 0 Normal
05/17/2026 07 AM PDT 36.84 192 0 Normal
05/17/2026 08 AM PDT 36.84 192 0 Normal
05/17/2026 09 AM PDT 36.84 192 0 Normal
05/17/2026 10 AM PDT 36.84 192 0 Normal
05/17/2026 11 AM PDT 36.84 192 0 Normal
05/17/2026 12 PM PDT 36.84 192 0 Normal
05/17/2026 01 PM PDT 36.84 192 0 Normal
05/17/2026 02 PM PDT 36.84 192 0 Normal
05/17/2026 03 PM PDT 36.84 192 0 Normal
05/17/2026 04 PM PDT 36.84 192 0 Normal
05/17/2026 05 PM PDT 36.84 192 0 Normal
05/17/2026 06 PM PDT 36.84 192 0 Normal
05/17/2026 07 PM PDT 36.84 192 0 Normal
05/17/2026 08 PM PDT 36.84 192 0 Normal
05/17/2026 09 PM PDT 36.84 192 0 Normal
05/17/2026 10 PM PDT 36.84 192 0 Normal
05/17/2026 11 PM PDT 36.84 192 0 Normal
05/18/2026 12 AM PDT 36.84 192 0 Normal
05/18/2026 01 AM PDT 36.84 192 0 Normal
05/18/2026 02 AM PDT 36.84 192 0 Normal
05/18/2026 03 AM PDT 36.84 192 0 Normal
05/18/2026 04 AM PDT 36.84 192 0 Normal
05/18/2026 05 AM PDT 36.84 192 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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