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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 13 2026 at 1:24 PM PDT | Next Issuance: | Mar 14 2026 at 9:00 AM PDT
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| 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: 03/13/2026 at 01:24 PM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 03/08/2026 at 01:00 PM PDT
# Maximum Observed Stage: 33.93 Feet
# Maximum Observed Flow: 1545 cfs
#
# Earliest Date & Time of Maximum Forecast: 03/18/2026 at 02:00 AM PDT
# Maximum Forecast Stage: 33.38 Feet
# Maximum Forecast Flow: 1306 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
03/08/2026 01 PM PDT 33.93 1545 Normal
03/08/2026 02 PM PDT 33.91 1536 - Normal
03/08/2026 03 PM PDT 33.91 1536 0 Normal
03/08/2026 04 PM PDT 33.89 1527 - Normal
03/08/2026 05 PM PDT 33.89 1527 0 Normal
03/08/2026 06 PM PDT 33.87 1518 - Normal
03/08/2026 07 PM PDT 33.87 1518 0 Normal
03/08/2026 08 PM PDT 33.86 1514 - Normal
03/08/2026 09 PM PDT 33.84 1505 - Normal
03/08/2026 10 PM PDT 33.84 1505 0 Normal
03/08/2026 11 PM PDT 33.83 1501 - Normal
03/09/2026 12 AM PDT 33.83 1501 0 Normal
03/09/2026 01 AM PDT 33.82 1496 - Normal
03/09/2026 02 AM PDT 33.81 1492 - Normal
03/09/2026 03 AM PDT 33.81 1492 0 Normal
03/09/2026 04 AM PDT 33.80 1487 - Normal
03/09/2026 05 AM PDT 33.79 1483 - Normal
03/09/2026 06 AM PDT 33.78 1478 - Normal
03/09/2026 07 AM PDT 33.77 1474 - Normal
03/09/2026 08 AM PDT 33.75 1465 - Normal
03/09/2026 09 AM PDT 33.74 1461 - Normal
03/09/2026 10 AM PDT 33.73 1456 - Normal
03/09/2026 11 AM PDT 33.72 1452 - Normal
03/09/2026 12 PM PDT 33.69 1439 - Normal
03/09/2026 01 PM PDT 33.68 1434 - Normal
03/09/2026 02 PM PDT 33.67 1430 - Normal
03/09/2026 03 PM PDT 33.66 1426 - Normal
03/09/2026 04 PM PDT 33.65 1421 - Normal
03/09/2026 05 PM PDT 33.64 1417 - Normal
03/09/2026 06 PM PDT 33.62 1408 - Normal
03/09/2026 07 PM PDT 33.60 1400 - Normal
03/09/2026 08 PM PDT 33.59 1395 - Normal
03/09/2026 09 PM PDT 33.58 1391 - Normal
03/09/2026 10 PM PDT 33.56 1382 - Normal
03/09/2026 11 PM PDT 33.55 1378 - Normal
03/10/2026 12 AM PDT 33.54 1374 - Normal
03/10/2026 01 AM PDT 33.52 1365 - Normal
03/10/2026 02 AM PDT 33.52 1365 0 Normal
03/10/2026 03 AM PDT 33.51 1361 - Normal
03/10/2026 04 AM PDT 33.50 1357 - Normal
03/10/2026 05 AM PDT 33.49 1352 - Normal
03/10/2026 06 AM PDT 33.48 1348 - Normal
03/10/2026 07 AM PDT 33.47 1344 - Normal
03/10/2026 08 AM PDT 33.43 1327 - Normal
03/10/2026 09 AM PDT 33.40 1314 - Normal
03/10/2026 10 AM PDT 33.41 1318 + Normal
03/10/2026 11 AM PDT 33.39 1310 - Normal
03/10/2026 12 PM PDT 33.37 1302 - Normal
03/10/2026 01 PM PDT 33.37 1302 0 Normal
03/10/2026 02 PM PDT 33.35 1293 - Normal
03/10/2026 03 PM PDT 33.33 1285 - Normal
03/10/2026 04 PM PDT 33.33 1285 0 Normal
03/10/2026 05 PM PDT 33.32 1281 - Normal
03/10/2026 06 PM PDT 33.30 1272 - Normal
03/10/2026 07 PM PDT 33.29 1268 - Normal
03/10/2026 08 PM PDT 33.28 1264 - Normal
03/10/2026 09 PM PDT 33.27 1260 - Normal
03/10/2026 10 PM PDT 33.26 1256 - Normal
03/10/2026 11 PM PDT 33.26 1256 0 Normal
03/11/2026 12 AM PDT 33.25 1252 - Normal
03/11/2026 01 AM PDT 33.24 1247 - Normal
03/11/2026 02 AM PDT 33.24 1247 0 Normal
03/11/2026 03 AM PDT 33.23 1243 - Normal
03/11/2026 04 AM PDT 33.22 1239 - Normal
03/11/2026 05 AM PDT 33.22 1239 0 Normal
03/11/2026 06 AM PDT 33.21 1235 - Normal
03/11/2026 07 AM PDT 33.20 1231 - Normal
03/11/2026 08 AM PDT 33.19 1227 - Normal
03/11/2026 09 AM PDT 33.19 1227 0 Normal
03/11/2026 10 AM PDT 33.19 1227 0 Normal
03/11/2026 11 AM PDT 33.20 1231 + Normal
03/11/2026 12 PM PDT 33.20 1231 0 Normal
03/11/2026 01 PM PDT 33.19 1227 - Normal
03/11/2026 02 PM PDT 33.19 1227 0 Normal
03/11/2026 03 PM PDT 33.18 1223 - Normal
03/11/2026 04 PM PDT 33.19 1227 + Normal
03/11/2026 05 PM PDT 33.18 1223 - Normal
03/11/2026 06 PM PDT 33.18 1223 0 Normal
03/11/2026 07 PM PDT 33.17 1219 - Normal
03/11/2026 08 PM PDT 33.16 1215 - Normal
03/11/2026 09 PM PDT 33.16 1215 0 Normal
03/11/2026 10 PM PDT 33.15 1210 - Normal
03/11/2026 11 PM PDT 33.15 1210 0 Normal
03/12/2026 12 AM PDT 33.14 1206 - Normal
03/12/2026 01 AM PDT 33.14 1206 0 Normal
03/12/2026 02 AM PDT 33.15 1210 + Normal
03/12/2026 03 AM PDT 33.15 1210 0 Normal
03/12/2026 04 AM PDT 33.16 1215 + Normal
03/12/2026 05 AM PDT 33.17 1219 + Normal
03/12/2026 06 AM PDT 33.19 1227 + Normal
03/12/2026 07 AM PDT 33.21 1235 + Normal
03/12/2026 08 AM PDT 33.22 1239 + Normal
03/12/2026 09 AM PDT 33.24 1247 + Normal
03/12/2026 10 AM PDT 33.26 1256 + Normal
03/12/2026 11 AM PDT 33.27 1260 + Normal
03/12/2026 12 PM PDT 33.27 1260 0 Normal
03/12/2026 01 PM PDT 33.27 1260 0 Normal
03/12/2026 02 PM PDT 33.27 1260 0 Normal
03/12/2026 03 PM PDT 33.26 1256 - Normal
03/12/2026 04 PM PDT 33.25 1252 - Normal
03/12/2026 05 PM PDT 33.24 1247 - Normal
03/12/2026 06 PM PDT 33.21 1235 - Normal
03/12/2026 07 PM PDT 33.19 1227 - Normal
03/12/2026 08 PM PDT 33.18 1223 - Normal
03/12/2026 09 PM PDT 33.16 1215 - Normal
03/12/2026 10 PM PDT 33.15 1210 - Normal
03/12/2026 11 PM PDT 33.15 1210 0 Normal
03/13/2026 12 AM PDT 33.13 1202 - Normal
03/13/2026 01 AM PDT 33.14 1206 + Normal
03/13/2026 02 AM PDT 33.13 1202 - Normal
03/13/2026 03 AM PDT 33.13 1202 0 Normal
03/13/2026 04 AM PDT 33.13 1202 0 Normal
03/13/2026 05 AM PDT 33.13 1202 0 Normal
03/13/2026 06 AM PDT 33.13 1202 0 Normal
03/13/2026 07 AM PDT 33.13 1202 0 Normal
03/13/2026 08 AM PDT 33.13 1202 0 Normal
03/13/2026 09 AM PDT 33.15 1210 + Normal
03/13/2026 10 AM PDT 33.15 1210 0 Normal
03/13/2026 11 AM PDT 33.15 1210 0 Normal
03/13/2026 12 PM PDT 33.16 1215 + Normal
03/13/2026 01 PM PDT 33.16 1215 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
03/13/2026 02 PM PDT 33.17 1219 Normal
03/13/2026 03 PM PDT 33.17 1219 0 Normal
03/13/2026 04 PM PDT 33.18 1223 + Normal
03/13/2026 05 PM PDT 33.18 1223 0 Normal
03/13/2026 06 PM PDT 33.18 1223 0 Normal
03/13/2026 07 PM PDT 33.19 1227 + Normal
03/13/2026 08 PM PDT 33.19 1227 0 Normal
03/13/2026 09 PM PDT 33.19 1227 0 Normal
03/13/2026 10 PM PDT 33.19 1227 0 Normal
03/13/2026 11 PM PDT 33.20 1231 + Normal
03/14/2026 12 AM PDT 33.20 1231 0 Normal
03/14/2026 01 AM PDT 33.20 1231 0 Normal
03/14/2026 02 AM PDT 33.20 1231 0 Normal
03/14/2026 03 AM PDT 33.20 1231 0 Normal
03/14/2026 04 AM PDT 33.20 1231 0 Normal
03/14/2026 05 AM PDT 33.21 1235 + Normal
03/14/2026 06 AM PDT 33.21 1235 0 Normal
03/14/2026 07 AM PDT 33.21 1235 0 Normal
03/14/2026 08 AM PDT 33.21 1235 0 Normal
03/14/2026 09 AM PDT 33.21 1235 0 Normal
03/14/2026 10 AM PDT 33.21 1235 0 Normal
03/14/2026 11 AM PDT 33.21 1235 0 Normal
03/14/2026 12 PM PDT 33.21 1235 0 Normal
03/14/2026 01 PM PDT 33.21 1235 0 Normal
03/14/2026 02 PM PDT 33.22 1239 + Normal
03/14/2026 03 PM PDT 33.22 1239 0 Normal
03/14/2026 04 PM PDT 33.22 1239 0 Normal
03/14/2026 05 PM PDT 33.22 1239 0 Normal
03/14/2026 06 PM PDT 33.22 1239 0 Normal
03/14/2026 07 PM PDT 33.22 1239 0 Normal
03/14/2026 08 PM PDT 33.22 1239 0 Normal
03/14/2026 09 PM PDT 33.22 1239 0 Normal
03/14/2026 10 PM PDT 33.22 1239 0 Normal
03/14/2026 11 PM PDT 33.23 1243 + Normal
03/15/2026 12 AM PDT 33.23 1243 0 Normal
03/15/2026 01 AM PDT 33.23 1243 0 Normal
03/15/2026 02 AM PDT 33.23 1243 0 Normal
03/15/2026 03 AM PDT 33.23 1243 0 Normal
03/15/2026 04 AM PDT 33.23 1243 0 Normal
03/15/2026 05 AM PDT 33.23 1243 0 Normal
03/15/2026 06 AM PDT 33.24 1247 + Normal
03/15/2026 07 AM PDT 33.24 1247 0 Normal
03/15/2026 08 AM PDT 33.24 1247 0 Normal
03/15/2026 09 AM PDT 33.24 1247 0 Normal
03/15/2026 10 AM PDT 33.24 1247 0 Normal
03/15/2026 11 AM PDT 33.25 1252 + Normal
03/15/2026 12 PM PDT 33.25 1252 0 Normal
03/15/2026 01 PM PDT 33.25 1252 0 Normal
03/15/2026 02 PM PDT 33.25 1252 0 Normal
03/15/2026 03 PM PDT 33.26 1256 + Normal
03/15/2026 04 PM PDT 33.26 1256 0 Normal
03/15/2026 05 PM PDT 33.26 1256 0 Normal
03/15/2026 06 PM PDT 33.26 1256 0 Normal
03/15/2026 07 PM PDT 33.27 1260 + Normal
03/15/2026 08 PM PDT 33.27 1260 0 Normal
03/15/2026 09 PM PDT 33.27 1260 0 Normal
03/15/2026 10 PM PDT 33.27 1260 0 Normal
03/15/2026 11 PM PDT 33.28 1264 + Normal
03/16/2026 12 AM PDT 33.28 1264 0 Normal
03/16/2026 01 AM PDT 33.28 1264 0 Normal
03/16/2026 02 AM PDT 33.28 1264 0 Normal
03/16/2026 03 AM PDT 33.29 1268 + Normal
03/16/2026 04 AM PDT 33.29 1268 0 Normal
03/16/2026 05 AM PDT 33.29 1268 0 Normal
03/16/2026 06 AM PDT 33.30 1272 + Normal
03/16/2026 07 AM PDT 33.30 1272 0 Normal
03/16/2026 08 AM PDT 33.30 1272 0 Normal
03/16/2026 09 AM PDT 33.30 1272 0 Normal
03/16/2026 10 AM PDT 33.31 1276 + Normal
03/16/2026 11 AM PDT 33.31 1276 0 Normal
03/16/2026 12 PM PDT 33.31 1276 0 Normal
03/16/2026 01 PM PDT 33.31 1276 0 Normal
03/16/2026 02 PM PDT 33.31 1276 0 Normal
03/16/2026 03 PM PDT 33.32 1281 + Normal
03/16/2026 04 PM PDT 33.32 1281 0 Normal
03/16/2026 05 PM PDT 33.32 1281 0 Normal
03/16/2026 06 PM PDT 33.32 1281 0 Normal
03/16/2026 07 PM PDT 33.33 1285 + Normal
03/16/2026 08 PM PDT 33.33 1285 0 Normal
03/16/2026 09 PM PDT 33.33 1285 0 Normal
03/16/2026 10 PM PDT 33.33 1285 0 Normal
03/16/2026 11 PM PDT 33.33 1285 0 Normal
03/17/2026 12 AM PDT 33.34 1289 + Normal
03/17/2026 01 AM PDT 33.34 1289 0 Normal
03/17/2026 02 AM PDT 33.34 1289 0 Normal
03/17/2026 03 AM PDT 33.34 1289 0 Normal
03/17/2026 04 AM PDT 33.34 1289 0 Normal
03/17/2026 05 AM PDT 33.35 1293 + Normal
03/17/2026 06 AM PDT 33.35 1293 0 Normal
03/17/2026 07 AM PDT 33.35 1293 0 Normal
03/17/2026 08 AM PDT 33.35 1293 0 Normal
03/17/2026 09 AM PDT 33.35 1293 0 Normal
03/17/2026 10 AM PDT 33.35 1293 0 Normal
03/17/2026 11 AM PDT 33.36 1297 + Normal
03/17/2026 12 PM PDT 33.36 1297 0 Normal
03/17/2026 01 PM PDT 33.36 1297 0 Normal
03/17/2026 02 PM PDT 33.36 1297 0 Normal
03/17/2026 03 PM PDT 33.36 1297 0 Normal
03/17/2026 04 PM PDT 33.36 1297 0 Normal
03/17/2026 05 PM PDT 33.37 1302 + Normal
03/17/2026 06 PM PDT 33.37 1302 0 Normal
03/17/2026 07 PM PDT 33.37 1302 0 Normal
03/17/2026 08 PM PDT 33.37 1302 0 Normal
03/17/2026 09 PM PDT 33.37 1302 0 Normal
03/17/2026 10 PM PDT 33.37 1302 0 Normal
03/17/2026 11 PM PDT 33.37 1302 0 Normal
03/18/2026 12 AM PDT 33.37 1302 0 Normal
03/18/2026 01 AM PDT 33.37 1302 0 Normal
03/18/2026 02 AM PDT 33.38 1306 + Normal
03/18/2026 03 AM PDT 33.38 1306 0 Normal
03/18/2026 04 AM PDT 33.38 1306 0 Normal
03/18/2026 05 AM PDT 33.38 1306 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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