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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: | Jun 27 2026 at 7:49 AM PDT | Next Issuance: | Jun 28 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: 06/27/2026 at 07:49 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 06/22/2026 at 12:00 PM PDT
# Maximum Observed Stage: 30.71 Feet
# Maximum Observed Flow: 479 cfs
#
# Earliest Date & Time of Maximum Forecast: 06/29/2026 at 06:00 AM PDT
# Maximum Forecast Stage: 30.23 Feet
# Maximum Forecast Flow: 359 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
06/22/2026 07 AM PDT 30.69 474 Normal
06/22/2026 08 AM PDT 30.68 472 - Normal
06/22/2026 09 AM PDT 30.67 469 - Normal
06/22/2026 10 AM PDT 30.66 466 - Normal
06/22/2026 11 AM PDT 30.68 472 + Normal
06/22/2026 12 PM PDT 30.71 479 + Normal
06/22/2026 01 PM PDT 30.70 477 - Normal
06/22/2026 02 PM PDT 30.69 474 - Normal
06/22/2026 03 PM PDT 30.68 472 - Normal
06/22/2026 04 PM PDT 30.68 472 0 Normal
06/22/2026 05 PM PDT 30.65 464 - Normal
06/22/2026 06 PM PDT 30.63 458 - Normal
06/22/2026 07 PM PDT 30.62 456 - Normal
06/22/2026 08 PM PDT 30.58 445 - Normal
06/22/2026 09 PM PDT 30.55 438 - Normal
06/22/2026 10 PM PDT 30.53 433 - Normal
06/22/2026 11 PM PDT 30.50 425 - Normal
06/23/2026 12 AM PDT 30.47 417 - Normal
06/23/2026 01 AM PDT 30.46 415 - Normal
06/23/2026 02 AM PDT 30.44 410 - Normal
06/23/2026 03 AM PDT 30.41 402 - Normal
06/23/2026 04 AM PDT 30.40 400 - Normal
06/23/2026 05 AM PDT 30.34 385 - Normal
06/23/2026 06 AM PDT 30.31 378 - Normal
06/23/2026 07 AM PDT 30.29 373 - Normal
06/23/2026 08 AM PDT 30.29 373 0 Normal
06/23/2026 09 AM PDT 30.31 378 + Normal
06/23/2026 10 AM PDT 30.38 395 + Normal
06/23/2026 11 AM PDT 30.34 385 - Normal
06/23/2026 12 PM PDT 30.32 380 - Normal
06/23/2026 01 PM PDT 30.34 385 + Normal
06/23/2026 02 PM PDT 30.31 378 - Normal
06/23/2026 03 PM PDT 30.29 373 - Normal
06/23/2026 04 PM PDT 30.30 376 + Normal
06/23/2026 05 PM PDT 30.32 380 + Normal
06/23/2026 06 PM PDT 30.31 378 - Normal
06/23/2026 07 PM PDT 30.32 380 + Normal
06/23/2026 08 PM PDT 30.31 378 - Normal
06/23/2026 09 PM PDT 30.30 376 - Normal
06/23/2026 10 PM PDT 30.29 373 - Normal
06/23/2026 11 PM PDT 30.27 368 - Normal
06/24/2026 12 AM PDT 30.27 368 0 Normal
06/24/2026 01 AM PDT 30.27 368 0 Normal
06/24/2026 02 AM PDT 30.26 366 - Normal
06/24/2026 03 AM PDT 30.26 366 0 Normal
06/24/2026 04 AM PDT 30.27 368 + Normal
06/24/2026 05 AM PDT 30.24 361 - Normal
06/24/2026 06 AM PDT 30.22 356 - Normal
06/24/2026 07 AM PDT 30.22 356 0 Normal
06/24/2026 08 AM PDT 30.24 361 + Normal
06/24/2026 09 AM PDT 30.19 349 - Normal
06/24/2026 10 AM PDT 30.16 342 - Normal
06/24/2026 11 AM PDT 30.22 356 + Normal
06/24/2026 12 PM PDT 30.24 361 + Normal
06/24/2026 01 PM PDT 30.21 354 - Normal
06/24/2026 02 PM PDT 30.23 359 + Normal
06/24/2026 03 PM PDT 30.27 368 + Normal
06/24/2026 04 PM PDT 30.29 373 + Normal
06/24/2026 05 PM PDT 30.35 388 + Normal
06/24/2026 06 PM PDT 30.39 398 + Normal
06/24/2026 07 PM PDT 30.39 398 0 Normal
06/24/2026 08 PM PDT 30.42 405 + Normal
06/24/2026 09 PM PDT 30.42 405 0 Normal
06/24/2026 10 PM PDT 30.41 402 - Normal
06/24/2026 11 PM PDT 30.40 400 - Normal
06/25/2026 12 AM PDT 30.39 398 - Normal
06/25/2026 01 AM PDT 30.37 393 - Normal
06/25/2026 02 AM PDT 30.35 388 - Normal
06/25/2026 03 AM PDT 30.33 383 - Normal
06/25/2026 04 AM PDT 30.30 376 - Normal
06/25/2026 05 AM PDT 30.28 371 - Normal
06/25/2026 06 AM PDT 30.27 368 - Normal
06/25/2026 07 AM PDT 30.27 368 0 Normal
06/25/2026 08 AM PDT 30.25 364 - Normal
06/25/2026 09 AM PDT 30.24 361 - Normal
06/25/2026 10 AM PDT 30.23 359 - Normal
06/25/2026 11 AM PDT 30.21 354 - Normal
06/25/2026 12 PM PDT 30.19 349 - Normal
06/25/2026 01 PM PDT 30.20 352 + Normal
06/25/2026 02 PM PDT 30.21 354 + Normal
06/25/2026 03 PM PDT 30.23 359 + Normal
06/25/2026 04 PM PDT 30.26 366 + Normal
06/25/2026 05 PM PDT 30.27 368 + Normal
06/25/2026 06 PM PDT 30.28 371 + Normal
06/25/2026 07 PM PDT 30.30 376 + Normal
06/25/2026 08 PM PDT 30.31 378 + Normal
06/25/2026 09 PM PDT 30.33 383 + Normal
06/25/2026 10 PM PDT 30.35 388 + Normal
06/25/2026 11 PM PDT 30.32 380 - Normal
06/26/2026 12 AM PDT 30.33 383 + Normal
06/26/2026 01 AM PDT 30.33 383 0 Normal
06/26/2026 02 AM PDT 30.30 376 - Normal
06/26/2026 03 AM PDT 30.30 376 0 Normal
06/26/2026 04 AM PDT 30.29 373 - Normal
06/26/2026 05 AM PDT 30.27 368 - Normal
06/26/2026 06 AM PDT 30.25 364 - Normal
06/26/2026 07 AM PDT 30.23 359 - Normal
06/26/2026 08 AM PDT 30.23 359 0 Normal
06/26/2026 09 AM PDT 30.23 359 0 Normal
06/26/2026 10 AM PDT 30.23 359 0 Normal
06/26/2026 11 AM PDT 30.23 359 0 Normal
06/26/2026 12 PM PDT 30.23 359 0 Normal
06/26/2026 01 PM PDT 30.21 354 - Normal
06/26/2026 02 PM PDT 30.22 356 + Normal
06/26/2026 03 PM PDT 30.21 354 - Normal
06/26/2026 04 PM PDT 30.20 352 - Normal
06/26/2026 05 PM PDT 30.18 347 - Normal
06/26/2026 06 PM PDT 30.17 345 - Normal
06/26/2026 07 PM PDT 30.16 342 - Normal
06/26/2026 08 PM PDT 30.15 340 - Normal
06/26/2026 09 PM PDT 30.15 340 0 Normal
06/26/2026 10 PM PDT 30.14 338 - Normal
06/26/2026 11 PM PDT 30.14 338 0 Normal
06/27/2026 12 AM PDT 30.13 337 - Normal
06/27/2026 01 AM PDT 30.13 337 0 Normal
06/27/2026 02 AM PDT 30.14 338 + Normal
06/27/2026 03 AM PDT 30.14 338 0 Normal
06/27/2026 04 AM PDT 30.15 340 + Normal
06/27/2026 05 AM PDT 30.16 342 + Normal
06/27/2026 06 AM PDT 30.18 347 + Normal
06/27/2026 07 AM PDT 30.19 349 + Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
06/27/2026 08 AM PDT 30.20 352 Normal
06/27/2026 09 AM PDT 30.20 352 0 Normal
06/27/2026 10 AM PDT 30.20 352 0 Normal
06/27/2026 11 AM PDT 30.20 352 0 Normal
06/27/2026 12 PM PDT 30.20 352 0 Normal
06/27/2026 01 PM PDT 30.20 352 0 Normal
06/27/2026 02 PM PDT 30.20 352 0 Normal
06/27/2026 03 PM PDT 30.20 352 0 Normal
06/27/2026 04 PM PDT 30.20 352 0 Normal
06/27/2026 05 PM PDT 30.20 352 0 Normal
06/27/2026 06 PM PDT 30.20 352 0 Normal
06/27/2026 07 PM PDT 30.20 352 0 Normal
06/27/2026 08 PM PDT 30.20 352 0 Normal
06/27/2026 09 PM PDT 30.20 352 0 Normal
06/27/2026 10 PM PDT 30.20 352 0 Normal
06/27/2026 11 PM PDT 30.20 352 0 Normal
06/28/2026 12 AM PDT 30.20 352 0 Normal
06/28/2026 01 AM PDT 30.20 352 0 Normal
06/28/2026 02 AM PDT 30.20 352 0 Normal
06/28/2026 03 AM PDT 30.20 352 0 Normal
06/28/2026 04 AM PDT 30.20 352 0 Normal
06/28/2026 05 AM PDT 30.20 352 0 Normal
06/28/2026 06 AM PDT 30.20 352 0 Normal
06/28/2026 07 AM PDT 30.20 352 0 Normal
06/28/2026 08 AM PDT 30.20 352 0 Normal
06/28/2026 09 AM PDT 30.20 352 0 Normal
06/28/2026 10 AM PDT 30.20 352 0 Normal
06/28/2026 11 AM PDT 30.20 352 0 Normal
06/28/2026 12 PM PDT 30.20 352 0 Normal
06/28/2026 01 PM PDT 30.20 352 0 Normal
06/28/2026 02 PM PDT 30.20 352 0 Normal
06/28/2026 03 PM PDT 30.20 352 0 Normal
06/28/2026 04 PM PDT 30.21 354 + Normal
06/28/2026 05 PM PDT 30.21 354 0 Normal
06/28/2026 06 PM PDT 30.21 354 0 Normal
06/28/2026 07 PM PDT 30.21 354 0 Normal
06/28/2026 08 PM PDT 30.21 354 0 Normal
06/28/2026 09 PM PDT 30.21 354 0 Normal
06/28/2026 10 PM PDT 30.22 356 + Normal
06/28/2026 11 PM PDT 30.22 356 0 Normal
06/29/2026 12 AM PDT 30.22 356 0 Normal
06/29/2026 01 AM PDT 30.22 356 0 Normal
06/29/2026 02 AM PDT 30.22 356 0 Normal
06/29/2026 03 AM PDT 30.22 356 0 Normal
06/29/2026 04 AM PDT 30.22 356 0 Normal
06/29/2026 05 AM PDT 30.22 356 0 Normal
06/29/2026 06 AM PDT 30.23 359 + Normal
06/29/2026 07 AM PDT 30.23 359 0 Normal
06/29/2026 08 AM PDT 30.23 359 0 Normal
06/29/2026 09 AM PDT 30.23 359 0 Normal
06/29/2026 10 AM PDT 30.23 359 0 Normal
06/29/2026 11 AM PDT 30.23 359 0 Normal
06/29/2026 12 PM PDT 30.23 359 0 Normal
06/29/2026 01 PM PDT 30.23 359 0 Normal
06/29/2026 02 PM PDT 30.23 359 0 Normal
06/29/2026 03 PM PDT 30.23 359 0 Normal
06/29/2026 04 PM PDT 30.23 359 0 Normal
06/29/2026 05 PM PDT 30.23 359 0 Normal
06/29/2026 06 PM PDT 30.23 359 0 Normal
06/29/2026 07 PM PDT 30.23 359 0 Normal
06/29/2026 08 PM PDT 30.23 359 0 Normal
06/29/2026 09 PM PDT 30.23 359 0 Normal
06/29/2026 10 PM PDT 30.23 359 0 Normal
06/29/2026 11 PM PDT 30.23 359 0 Normal
06/30/2026 12 AM PDT 30.23 359 0 Normal
06/30/2026 01 AM PDT 30.23 359 0 Normal
06/30/2026 02 AM PDT 30.23 359 0 Normal
06/30/2026 03 AM PDT 30.23 359 0 Normal
06/30/2026 04 AM PDT 30.23 359 0 Normal
06/30/2026 05 AM PDT 30.23 359 0 Normal
06/30/2026 06 AM PDT 30.22 356 - Normal
06/30/2026 07 AM PDT 30.22 356 0 Normal
06/30/2026 08 AM PDT 30.22 356 0 Normal
06/30/2026 09 AM PDT 30.22 356 0 Normal
06/30/2026 10 AM PDT 30.22 356 0 Normal
06/30/2026 11 AM PDT 30.22 356 0 Normal
06/30/2026 12 PM PDT 30.22 356 0 Normal
06/30/2026 01 PM PDT 30.22 356 0 Normal
06/30/2026 02 PM PDT 30.22 356 0 Normal
06/30/2026 03 PM PDT 30.22 356 0 Normal
06/30/2026 04 PM PDT 30.22 356 0 Normal
06/30/2026 05 PM PDT 30.22 356 0 Normal
06/30/2026 06 PM PDT 30.22 356 0 Normal
06/30/2026 07 PM PDT 30.21 354 - Normal
06/30/2026 08 PM PDT 30.21 354 0 Normal
06/30/2026 09 PM PDT 30.21 354 0 Normal
06/30/2026 10 PM PDT 30.21 354 0 Normal
06/30/2026 11 PM PDT 30.21 354 0 Normal
07/01/2026 12 AM PDT 30.21 354 0 Normal
07/01/2026 01 AM PDT 30.21 354 0 Normal
07/01/2026 02 AM PDT 30.21 354 0 Normal
07/01/2026 03 AM PDT 30.21 354 0 Normal
07/01/2026 04 AM PDT 30.21 354 0 Normal
07/01/2026 05 AM PDT 30.21 354 0 Normal
07/01/2026 06 AM PDT 30.21 354 0 Normal
07/01/2026 07 AM PDT 30.20 352 - Normal
07/01/2026 08 AM PDT 30.20 352 0 Normal
07/01/2026 09 AM PDT 30.20 352 0 Normal
07/01/2026 10 AM PDT 30.20 352 0 Normal
07/01/2026 11 AM PDT 30.20 352 0 Normal
07/01/2026 12 PM PDT 30.20 352 0 Normal
07/01/2026 01 PM PDT 30.20 352 0 Normal
07/01/2026 02 PM PDT 30.20 352 0 Normal
07/01/2026 03 PM PDT 30.20 352 0 Normal
07/01/2026 04 PM PDT 30.20 352 0 Normal
07/01/2026 05 PM PDT 30.20 352 0 Normal
07/01/2026 06 PM PDT 30.20 352 0 Normal
07/01/2026 07 PM PDT 30.20 352 0 Normal
07/01/2026 08 PM PDT 30.20 352 0 Normal
07/01/2026 09 PM PDT 30.20 352 0 Normal
07/01/2026 10 PM PDT 30.20 352 0 Normal
07/01/2026 11 PM PDT 30.20 352 0 Normal
07/02/2026 12 AM PDT 30.20 352 0 Normal
07/02/2026 01 AM PDT 30.20 352 0 Normal
07/02/2026 02 AM PDT 30.19 349 - Normal
07/02/2026 03 AM PDT 30.19 349 0 Normal
07/02/2026 04 AM PDT 30.19 349 0 Normal
07/02/2026 05 AM PDT 30.19 349 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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