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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 09 2026 at 7:45 AM PDT | Next Issuance: | Jun 10 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: 06/09/2026 at 07:45 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 06/08/2026 at 10:00 AM PDT
# Maximum Observed Stage: 31.15 Feet
# Maximum Observed Flow: 601 cfs
#
# Earliest Date & Time of Maximum Forecast: 06/09/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 30.90 Feet
# Maximum Forecast Flow: 531 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
06/04/2026 07 AM PDT 31.03 567 Normal
06/04/2026 08 AM PDT 31.05 573 + Normal
06/04/2026 09 AM PDT 31.05 573 0 Normal
06/04/2026 10 AM PDT 31.05 573 0 Normal
06/04/2026 11 AM PDT 31.05 573 0 Normal
06/04/2026 12 PM PDT 31.05 573 0 Normal
06/04/2026 01 PM PDT 31.04 570 - Normal
06/04/2026 02 PM PDT 31.01 561 - Normal
06/04/2026 03 PM PDT 31.00 559 - Normal
06/04/2026 04 PM PDT 31.01 561 + Normal
06/04/2026 05 PM PDT 30.99 556 - Normal
06/04/2026 06 PM PDT 30.99 556 0 Normal
06/04/2026 07 PM PDT 30.98 553 - Normal
06/04/2026 08 PM PDT 30.97 550 - Normal
06/04/2026 09 PM PDT 30.97 550 0 Normal
06/04/2026 10 PM PDT 30.97 550 0 Normal
06/04/2026 11 PM PDT 30.98 553 + Normal
06/05/2026 12 AM PDT 30.98 553 0 Normal
06/05/2026 01 AM PDT 30.99 556 + Normal
06/05/2026 02 AM PDT 30.99 556 0 Normal
06/05/2026 03 AM PDT 30.98 553 - Normal
06/05/2026 04 AM PDT 30.98 553 0 Normal
06/05/2026 05 AM PDT 30.98 553 0 Normal
06/05/2026 06 AM PDT 30.98 553 0 Normal
06/05/2026 07 AM PDT 30.97 550 - Normal
06/05/2026 08 AM PDT 30.97 550 0 Normal
06/05/2026 09 AM PDT 30.96 547 - Normal
06/05/2026 10 AM PDT 30.97 550 + Normal
06/05/2026 11 AM PDT 30.96 547 - Normal
06/05/2026 12 PM PDT 30.95 545 - Normal
06/05/2026 01 PM PDT 30.95 545 0 Normal
06/05/2026 02 PM PDT 30.95 545 0 Normal
06/05/2026 03 PM PDT 30.97 550 + Normal
06/05/2026 04 PM PDT 30.97 550 0 Normal
06/05/2026 05 PM PDT 30.96 547 - Normal
06/05/2026 06 PM PDT 30.98 553 + Normal
06/05/2026 07 PM PDT 30.96 547 - Normal
06/05/2026 08 PM PDT 30.95 545 - Normal
06/05/2026 09 PM PDT 30.94 542 - Normal
06/05/2026 10 PM PDT 30.93 539 - Normal
06/05/2026 11 PM PDT 30.92 536 - Normal
06/06/2026 12 AM PDT 30.91 534 - Normal
06/06/2026 01 AM PDT 30.90 531 - Normal
06/06/2026 02 AM PDT 30.89 528 - Normal
06/06/2026 03 AM PDT 30.88 525 - Normal
06/06/2026 04 AM PDT 30.88 525 0 Normal
06/06/2026 05 AM PDT 30.88 525 0 Normal
06/06/2026 06 AM PDT 30.88 525 0 Normal
06/06/2026 07 AM PDT 30.90 531 + Normal
06/06/2026 08 AM PDT 30.90 531 0 Normal
06/06/2026 09 AM PDT 30.91 534 + Normal
06/06/2026 10 AM PDT 30.92 536 + Normal
06/06/2026 11 AM PDT 30.95 545 + Normal
06/06/2026 12 PM PDT 30.96 547 + Normal
06/06/2026 01 PM PDT 30.97 550 + Normal
06/06/2026 02 PM PDT 30.98 553 + Normal
06/06/2026 03 PM PDT 30.99 556 + Normal
06/06/2026 04 PM PDT 30.99 556 0 Normal
06/06/2026 05 PM PDT 31.02 564 + Normal
06/06/2026 06 PM PDT 31.01 561 - Normal
06/06/2026 07 PM PDT 31.00 559 - Normal
06/06/2026 08 PM PDT 31.01 561 + Normal
06/06/2026 09 PM PDT 30.99 556 - Normal
06/06/2026 10 PM PDT 31.00 559 + Normal
06/06/2026 11 PM PDT 31.00 559 0 Normal
06/07/2026 12 AM PDT 30.97 550 - Normal
06/07/2026 01 AM PDT 30.98 553 + Normal
06/07/2026 02 AM PDT 30.98 553 0 Normal
06/07/2026 03 AM PDT 30.97 550 - Normal
06/07/2026 04 AM PDT 30.98 553 + Normal
06/07/2026 05 AM PDT 30.98 553 0 Normal
06/07/2026 06 AM PDT 30.98 553 0 Normal
06/07/2026 07 AM PDT 30.99 556 + Normal
06/07/2026 08 AM PDT 30.99 556 0 Normal
06/07/2026 09 AM PDT 31.01 561 + Normal
06/07/2026 10 AM PDT 31.05 573 + Normal
06/07/2026 11 AM PDT 31.07 578 + Normal
06/07/2026 12 PM PDT 31.12 593 + Normal
06/07/2026 01 PM PDT 31.15 601 + Normal
06/07/2026 02 PM PDT 31.15 601 0 Normal
06/07/2026 03 PM PDT 31.15 601 0 Normal
06/07/2026 04 PM PDT 31.14 598 - Normal
06/07/2026 05 PM PDT 31.13 595 - Normal
06/07/2026 06 PM PDT 31.13 595 0 Normal
06/07/2026 07 PM PDT 31.11 590 - Normal
06/07/2026 08 PM PDT 31.11 590 0 Normal
06/07/2026 09 PM PDT 31.11 590 0 Normal
06/07/2026 10 PM PDT 31.11 590 0 Normal
06/07/2026 11 PM PDT 31.11 590 0 Normal
06/08/2026 12 AM PDT 31.11 590 0 Normal
06/08/2026 01 AM PDT 31.11 590 0 Normal
06/08/2026 02 AM PDT 31.11 590 0 Normal
06/08/2026 03 AM PDT 31.10 587 - Normal
06/08/2026 04 AM PDT 31.09 584 - Normal
06/08/2026 05 AM PDT 31.10 587 + Normal
06/08/2026 06 AM PDT 31.09 584 - Normal
06/08/2026 07 AM PDT 31.10 587 + Normal
06/08/2026 08 AM PDT 31.13 595 + Normal
06/08/2026 09 AM PDT 31.14 598 + Normal
06/08/2026 10 AM PDT 31.15 601 + Normal
06/08/2026 11 AM PDT 31.14 598 - Normal
06/08/2026 12 PM PDT 31.14 598 0 Normal
06/08/2026 01 PM PDT 31.14 598 0 Normal
06/08/2026 02 PM PDT 31.12 593 - Normal
06/08/2026 03 PM PDT 31.11 590 - Normal
06/08/2026 04 PM PDT 31.07 578 - Normal
06/08/2026 05 PM PDT 31.05 573 - Normal
06/08/2026 06 PM PDT 31.04 570 - Normal
06/08/2026 07 PM PDT 31.02 564 - Normal
06/08/2026 08 PM PDT 31.00 559 - Normal
06/08/2026 09 PM PDT 30.99 556 - Normal
06/08/2026 10 PM PDT 30.98 553 - Normal
06/08/2026 11 PM PDT 30.97 550 - Normal
06/09/2026 12 AM PDT 30.97 550 0 Normal
06/09/2026 01 AM PDT 30.96 547 - Normal
06/09/2026 02 AM PDT 30.95 545 - Normal
06/09/2026 03 AM PDT 30.94 542 - Normal
06/09/2026 04 AM PDT 30.93 539 - Normal
06/09/2026 05 AM PDT 30.92 536 - Normal
06/09/2026 06 AM PDT 30.91 534 - Normal
06/09/2026 07 AM PDT 30.90 531 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
06/09/2026 08 AM PDT 30.90 531 Normal
06/09/2026 09 AM PDT 30.89 528 - Normal
06/09/2026 10 AM PDT 30.89 528 0 Normal
06/09/2026 11 AM PDT 30.89 528 0 Normal
06/09/2026 12 PM PDT 30.88 525 - Normal
06/09/2026 01 PM PDT 30.88 525 0 Normal
06/09/2026 02 PM PDT 30.87 523 - Normal
06/09/2026 03 PM PDT 30.87 523 0 Normal
06/09/2026 04 PM PDT 30.87 523 0 Normal
06/09/2026 05 PM PDT 30.86 520 - Normal
06/09/2026 06 PM PDT 30.86 520 0 Normal
06/09/2026 07 PM PDT 30.86 520 0 Normal
06/09/2026 08 PM PDT 30.86 520 0 Normal
06/09/2026 09 PM PDT 30.86 520 0 Normal
06/09/2026 10 PM PDT 30.86 520 0 Normal
06/09/2026 11 PM PDT 30.85 517 - Normal
06/10/2026 12 AM PDT 30.85 517 0 Normal
06/10/2026 01 AM PDT 30.85 517 0 Normal
06/10/2026 02 AM PDT 30.85 517 0 Normal
06/10/2026 03 AM PDT 30.85 517 0 Normal
06/10/2026 04 AM PDT 30.84 514 - Normal
06/10/2026 05 AM PDT 30.84 514 0 Normal
06/10/2026 06 AM PDT 30.84 514 0 Normal
06/10/2026 07 AM PDT 30.84 514 0 Normal
06/10/2026 08 AM PDT 30.84 514 0 Normal
06/10/2026 09 AM PDT 30.83 512 - Normal
06/10/2026 10 AM PDT 30.83 512 0 Normal
06/10/2026 11 AM PDT 30.83 512 0 Normal
06/10/2026 12 PM PDT 30.82 509 - Normal
06/10/2026 01 PM PDT 30.82 509 0 Normal
06/10/2026 02 PM PDT 30.82 509 0 Normal
06/10/2026 03 PM PDT 30.82 509 0 Normal
06/10/2026 04 PM PDT 30.82 509 0 Normal
06/10/2026 05 PM PDT 30.81 506 - Normal
06/10/2026 06 PM PDT 30.81 506 0 Normal
06/10/2026 07 PM PDT 30.81 506 0 Normal
06/10/2026 08 PM PDT 30.80 503 - Normal
06/10/2026 09 PM PDT 30.80 503 0 Normal
06/10/2026 10 PM PDT 30.80 503 0 Normal
06/10/2026 11 PM PDT 30.80 503 0 Normal
06/11/2026 12 AM PDT 30.79 501 - Normal
06/11/2026 01 AM PDT 30.79 501 0 Normal
06/11/2026 02 AM PDT 30.79 501 0 Normal
06/11/2026 03 AM PDT 30.79 501 0 Normal
06/11/2026 04 AM PDT 30.78 498 - Normal
06/11/2026 05 AM PDT 30.78 498 0 Normal
06/11/2026 06 AM PDT 30.78 498 0 Normal
06/11/2026 07 AM PDT 30.78 498 0 Normal
06/11/2026 08 AM PDT 30.77 495 - Normal
06/11/2026 09 AM PDT 30.77 495 0 Normal
06/11/2026 10 AM PDT 30.77 495 0 Normal
06/11/2026 11 AM PDT 30.77 495 0 Normal
06/11/2026 12 PM PDT 30.77 495 0 Normal
06/11/2026 01 PM PDT 30.76 493 - Normal
06/11/2026 02 PM PDT 30.76 493 0 Normal
06/11/2026 03 PM PDT 30.76 493 0 Normal
06/11/2026 04 PM PDT 30.76 493 0 Normal
06/11/2026 05 PM PDT 30.75 490 - Normal
06/11/2026 06 PM PDT 30.75 490 0 Normal
06/11/2026 07 PM PDT 30.75 490 0 Normal
06/11/2026 08 PM PDT 30.75 490 0 Normal
06/11/2026 09 PM PDT 30.75 490 0 Normal
06/11/2026 10 PM PDT 30.74 487 - Normal
06/11/2026 11 PM PDT 30.74 487 0 Normal
06/12/2026 12 AM PDT 30.74 487 0 Normal
06/12/2026 01 AM PDT 30.74 487 0 Normal
06/12/2026 02 AM PDT 30.73 485 - Normal
06/12/2026 03 AM PDT 30.73 485 0 Normal
06/12/2026 04 AM PDT 30.73 485 0 Normal
06/12/2026 05 AM PDT 30.73 485 0 Normal
06/12/2026 06 AM PDT 30.73 485 0 Normal
06/12/2026 07 AM PDT 30.73 485 0 Normal
06/12/2026 08 AM PDT 30.72 482 - Normal
06/12/2026 09 AM PDT 30.72 482 0 Normal
06/12/2026 10 AM PDT 30.72 482 0 Normal
06/12/2026 11 AM PDT 30.72 482 0 Normal
06/12/2026 12 PM PDT 30.72 482 0 Normal
06/12/2026 01 PM PDT 30.71 479 - Normal
06/12/2026 02 PM PDT 30.71 479 0 Normal
06/12/2026 03 PM PDT 30.71 479 0 Normal
06/12/2026 04 PM PDT 30.71 479 0 Normal
06/12/2026 05 PM PDT 30.71 479 0 Normal
06/12/2026 06 PM PDT 30.71 479 0 Normal
06/12/2026 07 PM PDT 30.70 477 - Normal
06/12/2026 08 PM PDT 30.70 477 0 Normal
06/12/2026 09 PM PDT 30.70 477 0 Normal
06/12/2026 10 PM PDT 30.70 477 0 Normal
06/12/2026 11 PM PDT 30.70 477 0 Normal
06/13/2026 12 AM PDT 30.70 477 0 Normal
06/13/2026 01 AM PDT 30.69 474 - Normal
06/13/2026 02 AM PDT 30.69 474 0 Normal
06/13/2026 03 AM PDT 30.69 474 0 Normal
06/13/2026 04 AM PDT 30.69 474 0 Normal
06/13/2026 05 AM PDT 30.69 474 0 Normal
06/13/2026 06 AM PDT 30.69 474 0 Normal
06/13/2026 07 AM PDT 30.68 472 - Normal
06/13/2026 08 AM PDT 30.68 472 0 Normal
06/13/2026 09 AM PDT 30.68 472 0 Normal
06/13/2026 10 AM PDT 30.68 472 0 Normal
06/13/2026 11 AM PDT 30.68 472 0 Normal
06/13/2026 12 PM PDT 30.68 472 0 Normal
06/13/2026 01 PM PDT 30.67 469 - Normal
06/13/2026 02 PM PDT 30.67 469 0 Normal
06/13/2026 03 PM PDT 30.67 469 0 Normal
06/13/2026 04 PM PDT 30.67 469 0 Normal
06/13/2026 05 PM PDT 30.67 469 0 Normal
06/13/2026 06 PM PDT 30.67 469 0 Normal
06/13/2026 07 PM PDT 30.67 469 0 Normal
06/13/2026 08 PM PDT 30.66 466 - Normal
06/13/2026 09 PM PDT 30.66 466 0 Normal
06/13/2026 10 PM PDT 30.66 466 0 Normal
06/13/2026 11 PM PDT 30.66 466 0 Normal
06/14/2026 12 AM PDT 30.66 466 0 Normal
06/14/2026 01 AM PDT 30.66 466 0 Normal
06/14/2026 02 AM PDT 30.66 466 0 Normal
06/14/2026 03 AM PDT 30.65 464 - Normal
06/14/2026 04 AM PDT 30.65 464 0 Normal
06/14/2026 05 AM PDT 30.65 464 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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