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SAN JOAQUIN RIVER - PATTERSON (PATC1)
| Latitude: 37.49º N | Longitude: 121.08º W | Elevation: 97 Feet | | Forecast Type: Official Location |
| Location: Stanislaus County in California | Bulletin Group: San Joaquin | River Group: San Joaquin |
| Issuance Time: | Mar 20 2026 at 1:26 PM PDT | Next Issuance: | Mar 21 2026 at 9:00 AM PDT
| |
| Action/Monitor: 48.0 Feet | Minor Flood: 54.7 Feet | Moderate Flood: 57.3 Feet | Major Flood: 58.3 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Patterson (PATC1)
#
# File Generation Time: 03/20/2026 at 01:26 PM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 03/15/2026 at 03:00 PM PDT
# Maximum Observed Stage: 33.33 Feet
# Maximum Observed Flow: 1285 cfs
#
# Earliest Date & Time of Maximum Forecast: 03/20/2026 at 02:00 PM PDT
# Maximum Forecast Stage: 33.15 Feet
# Maximum Forecast Flow: 1210 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
03/15/2026 01 PM PDT 33.33 1285 Normal
03/15/2026 02 PM PDT 33.32 1281 - Normal
03/15/2026 03 PM PDT 33.33 1285 + Normal
03/15/2026 04 PM PDT 33.32 1281 - Normal
03/15/2026 05 PM PDT 33.31 1276 - Normal
03/15/2026 06 PM PDT 33.31 1276 0 Normal
03/15/2026 07 PM PDT 33.31 1276 0 Normal
03/15/2026 08 PM PDT 33.30 1272 - Normal
03/15/2026 09 PM PDT 33.30 1272 0 Normal
03/15/2026 10 PM PDT 33.30 1272 0 Normal
03/15/2026 11 PM PDT 33.30 1272 0 Normal
03/16/2026 12 AM PDT 33.29 1268 - Normal
03/16/2026 01 AM PDT 33.29 1268 0 Normal
03/16/2026 02 AM PDT 33.29 1268 0 Normal
03/16/2026 03 AM PDT 33.28 1264 - Normal
03/16/2026 04 AM PDT 33.28 1264 0 Normal
03/16/2026 05 AM PDT 33.28 1264 0 Normal
03/16/2026 06 AM PDT 33.28 1264 0 Normal
03/16/2026 07 AM PDT 33.27 1260 - Normal
03/16/2026 08 AM PDT 33.25 1252 - Normal
03/16/2026 09 AM PDT 33.23 1243 - Normal
03/16/2026 10 AM PDT 33.21 1235 - Normal
03/16/2026 11 AM PDT 33.20 1231 - Normal
03/16/2026 12 PM PDT 33.20 1231 0 Normal
03/16/2026 01 PM PDT 33.21 1235 + Normal
03/16/2026 02 PM PDT 33.19 1227 - Normal
03/16/2026 03 PM PDT 33.20 1231 + Normal
03/16/2026 04 PM PDT 33.21 1235 + Normal
03/16/2026 05 PM PDT 33.21 1235 0 Normal
03/16/2026 06 PM PDT 33.21 1235 0 Normal
03/16/2026 07 PM PDT 33.22 1239 + Normal
03/16/2026 08 PM PDT 33.21 1235 - Normal
03/16/2026 09 PM PDT 33.21 1235 0 Normal
03/16/2026 10 PM PDT 33.21 1235 0 Normal
03/16/2026 11 PM PDT 33.21 1235 0 Normal
03/17/2026 12 AM PDT 33.21 1235 0 Normal
03/17/2026 01 AM PDT 33.21 1235 0 Normal
03/17/2026 02 AM PDT 33.21 1235 0 Normal
03/17/2026 03 AM PDT 33.21 1235 0 Normal
03/17/2026 04 AM PDT 33.20 1231 - Normal
03/17/2026 05 AM PDT 33.20 1231 0 Normal
03/17/2026 06 AM PDT 33.20 1231 0 Normal
03/17/2026 07 AM PDT 33.20 1231 0 Normal
03/17/2026 08 AM PDT 33.18 1223 - Normal
03/17/2026 09 AM PDT 33.17 1219 - Normal
03/17/2026 10 AM PDT 33.15 1210 - Normal
03/17/2026 11 AM PDT 33.12 1198 - Normal
03/17/2026 12 PM PDT 33.10 1190 - Normal
03/17/2026 01 PM PDT 33.11 1194 + Normal
03/17/2026 02 PM PDT 33.09 1186 - Normal
03/17/2026 03 PM PDT 33.08 1182 - Normal
03/17/2026 04 PM PDT 33.08 1182 0 Normal
03/17/2026 05 PM PDT 33.07 1178 - Normal
03/17/2026 06 PM PDT 33.07 1178 0 Normal
03/17/2026 07 PM PDT 33.06 1174 - Normal
03/17/2026 08 PM PDT 33.05 1170 - Normal
03/17/2026 09 PM PDT 33.05 1170 0 Normal
03/17/2026 10 PM PDT 33.05 1170 0 Normal
03/17/2026 11 PM PDT 33.04 1166 - Normal
03/18/2026 12 AM PDT 33.03 1162 - Normal
03/18/2026 01 AM PDT 33.04 1166 + Normal
03/18/2026 02 AM PDT 33.03 1162 - Normal
03/18/2026 03 AM PDT 33.04 1166 + Normal
03/18/2026 04 AM PDT 33.03 1162 - Normal
03/18/2026 05 AM PDT 33.03 1162 0 Normal
03/18/2026 06 AM PDT 33.03 1162 0 Normal
03/18/2026 07 AM PDT 33.03 1162 0 Normal
03/18/2026 08 AM PDT 33.03 1162 0 Normal
03/18/2026 09 AM PDT 33.03 1162 0 Normal
03/18/2026 10 AM PDT 33.02 1158 - Normal
03/18/2026 11 AM PDT 33.02 1158 0 Normal
03/18/2026 12 PM PDT 33.02 1158 0 Normal
03/18/2026 01 PM PDT 33.01 1154 - Normal
03/18/2026 02 PM PDT 33.01 1154 0 Normal
03/18/2026 03 PM PDT 33.01 1154 0 Normal
03/18/2026 04 PM PDT 33.01 1154 0 Normal
03/18/2026 05 PM PDT 33.01 1154 0 Normal
03/18/2026 06 PM PDT 33.01 1154 0 Normal
03/18/2026 07 PM PDT 33.01 1154 0 Normal
03/18/2026 08 PM PDT 33.01 1154 0 Normal
03/18/2026 09 PM PDT 33.01 1154 0 Normal
03/18/2026 10 PM PDT 33.02 1158 + Normal
03/18/2026 11 PM PDT 33.02 1158 0 Normal
03/19/2026 12 AM PDT 33.02 1158 0 Normal
03/19/2026 01 AM PDT 33.02 1158 0 Normal
03/19/2026 02 AM PDT 33.02 1158 0 Normal
03/19/2026 03 AM PDT 33.03 1162 + Normal
03/19/2026 04 AM PDT 33.04 1166 + Normal
03/19/2026 05 AM PDT 33.05 1170 + Normal
03/19/2026 06 AM PDT 33.06 1174 + Normal
03/19/2026 07 AM PDT 33.07 1178 + Normal
03/19/2026 08 AM PDT 33.08 1182 + Normal
03/19/2026 09 AM PDT 33.09 1186 + Normal
03/19/2026 10 AM PDT 33.09 1186 0 Normal
03/19/2026 11 AM PDT 33.09 1186 0 Normal
03/19/2026 12 PM PDT 33.10 1190 + Normal
03/19/2026 01 PM PDT 33.10 1190 0 Normal
03/19/2026 02 PM PDT 33.10 1190 0 Normal
03/19/2026 03 PM PDT 33.10 1190 0 Normal
03/19/2026 04 PM PDT 33.10 1190 0 Normal
03/19/2026 05 PM PDT 33.09 1186 - Normal
03/19/2026 06 PM PDT 33.08 1182 - Normal
03/19/2026 07 PM PDT 33.08 1182 0 Normal
03/19/2026 08 PM PDT 33.10 1190 + Normal
03/19/2026 09 PM PDT 33.08 1182 - Normal
03/19/2026 10 PM PDT 33.09 1186 + Normal
03/19/2026 11 PM PDT 33.09 1186 0 Normal
03/20/2026 12 AM PDT 33.09 1186 0 Normal
03/20/2026 01 AM PDT 33.09 1186 0 Normal
03/20/2026 02 AM PDT 33.09 1186 0 Normal
03/20/2026 03 AM PDT 33.09 1186 0 Normal
03/20/2026 04 AM PDT 33.10 1190 + Normal
03/20/2026 05 AM PDT 33.10 1190 0 Normal
03/20/2026 06 AM PDT 33.11 1194 + Normal
03/20/2026 07 AM PDT 33.11 1194 0 Normal
03/20/2026 08 AM PDT 33.12 1198 + Normal
03/20/2026 09 AM PDT 33.13 1202 + Normal
03/20/2026 10 AM PDT 33.14 1206 + Normal
03/20/2026 11 AM PDT 33.15 1210 + Normal
03/20/2026 12 PM PDT 33.15 1210 0 Normal
03/20/2026 01 PM PDT 33.15 1210 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
03/20/2026 02 PM PDT 33.15 1210 Normal
03/20/2026 03 PM PDT 33.14 1206 - Normal
03/20/2026 04 PM PDT 33.14 1206 0 Normal
03/20/2026 05 PM PDT 33.14 1206 0 Normal
03/20/2026 06 PM PDT 33.14 1206 0 Normal
03/20/2026 07 PM PDT 33.14 1206 0 Normal
03/20/2026 08 PM PDT 33.13 1202 - Normal
03/20/2026 09 PM PDT 33.13 1202 0 Normal
03/20/2026 10 PM PDT 33.13 1202 0 Normal
03/20/2026 11 PM PDT 33.13 1202 0 Normal
03/21/2026 12 AM PDT 33.13 1202 0 Normal
03/21/2026 01 AM PDT 33.13 1202 0 Normal
03/21/2026 02 AM PDT 33.13 1202 0 Normal
03/21/2026 03 AM PDT 33.13 1202 0 Normal
03/21/2026 04 AM PDT 33.13 1202 0 Normal
03/21/2026 05 AM PDT 33.13 1202 0 Normal
03/21/2026 06 AM PDT 33.13 1202 0 Normal
03/21/2026 07 AM PDT 33.13 1202 0 Normal
03/21/2026 08 AM PDT 33.13 1202 0 Normal
03/21/2026 09 AM PDT 33.14 1206 + Normal
03/21/2026 10 AM PDT 33.14 1206 0 Normal
03/21/2026 11 AM PDT 33.14 1206 0 Normal
03/21/2026 12 PM PDT 33.14 1206 0 Normal
03/21/2026 01 PM PDT 33.14 1206 0 Normal
03/21/2026 02 PM PDT 33.14 1206 0 Normal
03/21/2026 03 PM PDT 33.14 1206 0 Normal
03/21/2026 04 PM PDT 33.14 1206 0 Normal
03/21/2026 05 PM PDT 33.14 1206 0 Normal
03/21/2026 06 PM PDT 33.14 1206 0 Normal
03/21/2026 07 PM PDT 33.14 1206 0 Normal
03/21/2026 08 PM PDT 33.14 1206 0 Normal
03/21/2026 09 PM PDT 33.14 1206 0 Normal
03/21/2026 10 PM PDT 33.14 1206 0 Normal
03/21/2026 11 PM PDT 33.14 1206 0 Normal
03/22/2026 12 AM PDT 33.14 1206 0 Normal
03/22/2026 01 AM PDT 33.14 1206 0 Normal
03/22/2026 02 AM PDT 33.14 1206 0 Normal
03/22/2026 03 AM PDT 33.14 1206 0 Normal
03/22/2026 04 AM PDT 33.14 1206 0 Normal
03/22/2026 05 AM PDT 33.13 1202 - Normal
03/22/2026 06 AM PDT 33.13 1202 0 Normal
03/22/2026 07 AM PDT 33.13 1202 0 Normal
03/22/2026 08 AM PDT 33.13 1202 0 Normal
03/22/2026 09 AM PDT 33.13 1202 0 Normal
03/22/2026 10 AM PDT 33.13 1202 0 Normal
03/22/2026 11 AM PDT 33.13 1202 0 Normal
03/22/2026 12 PM PDT 33.13 1202 0 Normal
03/22/2026 01 PM PDT 33.13 1202 0 Normal
03/22/2026 02 PM PDT 33.13 1202 0 Normal
03/22/2026 03 PM PDT 33.13 1202 0 Normal
03/22/2026 04 PM PDT 33.12 1198 - Normal
03/22/2026 05 PM PDT 33.12 1198 0 Normal
03/22/2026 06 PM PDT 33.12 1198 0 Normal
03/22/2026 07 PM PDT 33.12 1198 0 Normal
03/22/2026 08 PM PDT 33.12 1198 0 Normal
03/22/2026 09 PM PDT 33.12 1198 0 Normal
03/22/2026 10 PM PDT 33.12 1198 0 Normal
03/22/2026 11 PM PDT 33.12 1198 0 Normal
03/23/2026 12 AM PDT 33.12 1198 0 Normal
03/23/2026 01 AM PDT 33.12 1198 0 Normal
03/23/2026 02 AM PDT 33.12 1198 0 Normal
03/23/2026 03 AM PDT 33.12 1198 0 Normal
03/23/2026 04 AM PDT 33.12 1198 0 Normal
03/23/2026 05 AM PDT 33.11 1194 - Normal
03/23/2026 06 AM PDT 33.11 1194 0 Normal
03/23/2026 07 AM PDT 33.11 1194 0 Normal
03/23/2026 08 AM PDT 33.11 1194 0 Normal
03/23/2026 09 AM PDT 33.11 1194 0 Normal
03/23/2026 10 AM PDT 33.11 1194 0 Normal
03/23/2026 11 AM PDT 33.11 1194 0 Normal
03/23/2026 12 PM PDT 33.11 1194 0 Normal
03/23/2026 01 PM PDT 33.11 1194 0 Normal
03/23/2026 02 PM PDT 33.11 1194 0 Normal
03/23/2026 03 PM PDT 33.11 1194 0 Normal
03/23/2026 04 PM PDT 33.11 1194 0 Normal
03/23/2026 05 PM PDT 33.11 1194 0 Normal
03/23/2026 06 PM PDT 33.11 1194 0 Normal
03/23/2026 07 PM PDT 33.11 1194 0 Normal
03/23/2026 08 PM PDT 33.11 1194 0 Normal
03/23/2026 09 PM PDT 33.10 1190 - Normal
03/23/2026 10 PM PDT 33.10 1190 0 Normal
03/23/2026 11 PM PDT 33.10 1190 0 Normal
03/24/2026 12 AM PDT 33.10 1190 0 Normal
03/24/2026 01 AM PDT 33.10 1190 0 Normal
03/24/2026 02 AM PDT 33.10 1190 0 Normal
03/24/2026 03 AM PDT 33.10 1190 0 Normal
03/24/2026 04 AM PDT 33.10 1190 0 Normal
03/24/2026 05 AM PDT 33.10 1190 0 Normal
03/24/2026 06 AM PDT 33.10 1190 0 Normal
03/24/2026 07 AM PDT 33.10 1190 0 Normal
03/24/2026 08 AM PDT 33.10 1190 0 Normal
03/24/2026 09 AM PDT 33.10 1190 0 Normal
03/24/2026 10 AM PDT 33.10 1190 0 Normal
03/24/2026 11 AM PDT 33.10 1190 0 Normal
03/24/2026 12 PM PDT 33.10 1190 0 Normal
03/24/2026 01 PM PDT 33.10 1190 0 Normal
03/24/2026 02 PM PDT 33.10 1190 0 Normal
03/24/2026 03 PM PDT 33.10 1190 0 Normal
03/24/2026 04 PM PDT 33.10 1190 0 Normal
03/24/2026 05 PM PDT 33.10 1190 0 Normal
03/24/2026 06 PM PDT 33.10 1190 0 Normal
03/24/2026 07 PM PDT 33.10 1190 0 Normal
03/24/2026 08 PM PDT 33.10 1190 0 Normal
03/24/2026 09 PM PDT 33.10 1190 0 Normal
03/24/2026 10 PM PDT 33.10 1190 0 Normal
03/24/2026 11 PM PDT 33.10 1190 0 Normal
03/25/2026 12 AM PDT 33.10 1190 0 Normal
03/25/2026 01 AM PDT 33.10 1190 0 Normal
03/25/2026 02 AM PDT 33.10 1190 0 Normal
03/25/2026 03 AM PDT 33.10 1190 0 Normal
03/25/2026 04 AM PDT 33.10 1190 0 Normal
03/25/2026 05 AM PDT 33.10 1190 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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