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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 14 2026 at 7:37 AM PDT | Next Issuance: | Jun 15 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: 06/14/2026 at 07:37 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 06/10/2026 at 01:00 AM PDT
# Maximum Observed Stage: 30.89 Feet
# Maximum Observed Flow: 528 cfs
#
# Earliest Date & Time of Maximum Forecast: 06/16/2026 at 10:00 PM PDT
# Maximum Forecast Stage: 30.81 Feet
# Maximum Forecast Flow: 506 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
06/09/2026 07 AM PDT 30.87 523 Normal
06/09/2026 08 AM PDT 30.85 517 - Normal
06/09/2026 09 AM PDT 30.85 517 0 Normal
06/09/2026 10 AM PDT 30.85 517 0 Normal
06/09/2026 11 AM PDT 30.84 514 - Normal
06/09/2026 12 PM PDT 30.83 512 - Normal
06/09/2026 01 PM PDT 30.82 509 - Normal
06/09/2026 02 PM PDT 30.82 509 0 Normal
06/09/2026 03 PM PDT 30.83 512 + Normal
06/09/2026 04 PM PDT 30.83 512 0 Normal
06/09/2026 05 PM PDT 30.83 512 0 Normal
06/09/2026 06 PM PDT 30.82 509 - Normal
06/09/2026 07 PM PDT 30.84 514 + Normal
06/09/2026 08 PM PDT 30.85 517 + Normal
06/09/2026 09 PM PDT 30.86 520 + Normal
06/09/2026 10 PM PDT 30.88 525 + Normal
06/09/2026 11 PM PDT 30.89 528 + Normal
06/10/2026 12 AM PDT 30.89 528 0 Normal
06/10/2026 01 AM PDT 30.89 528 0 Normal
06/10/2026 02 AM PDT 30.88 525 - Normal
06/10/2026 03 AM PDT 30.87 523 - Normal
06/10/2026 04 AM PDT 30.85 517 - Normal
06/10/2026 05 AM PDT 30.81 506 - Normal
06/10/2026 06 AM PDT 30.80 503 - Normal
06/10/2026 07 AM PDT 30.77 495 - Normal
06/10/2026 08 AM PDT 30.76 493 - Normal
06/10/2026 09 AM PDT 30.75 490 - Normal
06/10/2026 10 AM PDT 30.74 487 - Normal
06/10/2026 11 AM PDT 30.74 487 0 Normal
06/10/2026 12 PM PDT 30.76 493 + Normal
06/10/2026 01 PM PDT 30.78 498 + Normal
06/10/2026 02 PM PDT 30.78 498 0 Normal
06/10/2026 03 PM PDT 30.76 493 - Normal
06/10/2026 04 PM PDT 30.77 495 + Normal
06/10/2026 05 PM PDT 30.76 493 - Normal
06/10/2026 06 PM PDT 30.75 490 - Normal
06/10/2026 07 PM PDT 30.74 487 - Normal
06/10/2026 08 PM PDT 30.74 487 0 Normal
06/10/2026 09 PM PDT 30.75 490 + Normal
06/10/2026 10 PM PDT 30.75 490 0 Normal
06/10/2026 11 PM PDT 30.75 490 0 Normal
06/11/2026 12 AM PDT 30.76 493 + Normal
06/11/2026 01 AM PDT 30.76 493 0 Normal
06/11/2026 02 AM PDT 30.75 490 - Normal
06/11/2026 03 AM PDT 30.74 487 - Normal
06/11/2026 04 AM PDT 30.74 487 0 Normal
06/11/2026 05 AM PDT 30.73 485 - Normal
06/11/2026 06 AM PDT 30.72 482 - Normal
06/11/2026 07 AM PDT 30.69 474 - Normal
06/11/2026 08 AM PDT 30.70 477 + Normal
06/11/2026 09 AM PDT 30.72 482 + Normal
06/11/2026 10 AM PDT 30.70 477 - Normal
06/11/2026 11 AM PDT 30.68 472 - Normal
06/11/2026 12 PM PDT 30.69 474 + Normal
06/11/2026 01 PM PDT 30.67 469 - Normal
06/11/2026 02 PM PDT 30.67 469 0 Normal
06/11/2026 03 PM PDT 30.66 466 - Normal
06/11/2026 04 PM PDT 30.64 461 - Normal
06/11/2026 05 PM PDT 30.63 458 - Normal
06/11/2026 06 PM PDT 30.63 458 0 Normal
06/11/2026 07 PM PDT 30.63 458 0 Normal
06/11/2026 08 PM PDT 30.63 458 0 Normal
06/11/2026 09 PM PDT 30.62 456 - Normal
06/11/2026 10 PM PDT 30.62 456 0 Normal
06/11/2026 11 PM PDT 30.62 456 0 Normal
06/12/2026 12 AM PDT 30.62 456 0 Normal
06/12/2026 01 AM PDT 30.63 458 + Normal
06/12/2026 02 AM PDT 30.64 461 + Normal
06/12/2026 03 AM PDT 30.64 461 0 Normal
06/12/2026 04 AM PDT 30.65 464 + Normal
06/12/2026 05 AM PDT 30.65 464 0 Normal
06/12/2026 06 AM PDT 30.65 464 0 Normal
06/12/2026 07 AM PDT 30.65 464 0 Normal
06/12/2026 08 AM PDT 30.65 464 0 Normal
06/12/2026 09 AM PDT 30.65 464 0 Normal
06/12/2026 10 AM PDT 30.66 466 + Normal
06/12/2026 11 AM PDT 30.66 466 0 Normal
06/12/2026 12 PM PDT 30.67 469 + Normal
06/12/2026 01 PM PDT 30.67 469 0 Normal
06/12/2026 02 PM PDT 30.67 469 0 Normal
06/12/2026 03 PM PDT 30.65 464 - Normal
06/12/2026 04 PM PDT 30.64 461 - Normal
06/12/2026 05 PM PDT 30.63 458 - Normal
06/12/2026 06 PM PDT 30.63 458 0 Normal
06/12/2026 07 PM PDT 30.63 458 0 Normal
06/12/2026 08 PM PDT 30.62 456 - Normal
06/12/2026 09 PM PDT 30.62 456 0 Normal
06/12/2026 10 PM PDT 30.63 458 + Normal
06/12/2026 11 PM PDT 30.63 458 0 Normal
06/13/2026 12 AM PDT 30.62 456 - Normal
06/13/2026 01 AM PDT 30.62 456 0 Normal
06/13/2026 02 AM PDT 30.62 456 0 Normal
06/13/2026 03 AM PDT 30.62 456 0 Normal
06/13/2026 04 AM PDT 30.62 456 0 Normal
06/13/2026 05 AM PDT 30.60 451 - Normal
06/13/2026 06 AM PDT 30.60 451 0 Normal
06/13/2026 07 AM PDT 30.59 448 - Normal
06/13/2026 08 AM PDT 30.59 448 0 Normal
06/13/2026 09 AM PDT 30.58 445 - Normal
06/13/2026 10 AM PDT 30.60 451 + Normal
06/13/2026 11 AM PDT 30.59 448 - Normal
06/13/2026 12 PM PDT 30.59 448 0 Normal
06/13/2026 01 PM PDT 30.61 453 + Normal
06/13/2026 02 PM PDT 30.61 453 0 Normal
06/13/2026 03 PM PDT 30.59 448 - Normal
06/13/2026 04 PM PDT 30.59 448 0 Normal
06/13/2026 05 PM PDT 30.59 448 0 Normal
06/13/2026 06 PM PDT 30.57 443 - Normal
06/13/2026 07 PM PDT 30.56 440 - Normal
06/13/2026 08 PM PDT 30.56 440 0 Normal
06/13/2026 09 PM PDT 30.56 440 0 Normal
06/13/2026 10 PM PDT 30.56 440 0 Normal
06/13/2026 11 PM PDT 30.57 443 + Normal
06/14/2026 12 AM PDT 30.57 443 0 Normal
06/14/2026 01 AM PDT 30.58 445 + Normal
06/14/2026 02 AM PDT 30.58 445 0 Normal
06/14/2026 03 AM PDT 30.60 451 + Normal
06/14/2026 04 AM PDT 30.62 456 + Normal
06/14/2026 05 AM PDT 30.63 458 + Normal
06/14/2026 06 AM PDT 30.63 458 0 Normal
06/14/2026 07 AM PDT 30.63 458 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
06/14/2026 08 AM PDT 30.63 458 Normal
06/14/2026 09 AM PDT 30.63 458 0 Normal
06/14/2026 10 AM PDT 30.63 458 0 Normal
06/14/2026 11 AM PDT 30.64 461 + Normal
06/14/2026 12 PM PDT 30.64 461 0 Normal
06/14/2026 01 PM PDT 30.64 461 0 Normal
06/14/2026 02 PM PDT 30.64 461 0 Normal
06/14/2026 03 PM PDT 30.64 461 0 Normal
06/14/2026 04 PM PDT 30.65 464 + Normal
06/14/2026 05 PM PDT 30.65 464 0 Normal
06/14/2026 06 PM PDT 30.65 464 0 Normal
06/14/2026 07 PM PDT 30.65 464 0 Normal
06/14/2026 08 PM PDT 30.66 466 + Normal
06/14/2026 09 PM PDT 30.66 466 0 Normal
06/14/2026 10 PM PDT 30.66 466 0 Normal
06/14/2026 11 PM PDT 30.66 466 0 Normal
06/15/2026 12 AM PDT 30.66 466 0 Normal
06/15/2026 01 AM PDT 30.67 469 + Normal
06/15/2026 02 AM PDT 30.67 469 0 Normal
06/15/2026 03 AM PDT 30.67 469 0 Normal
06/15/2026 04 AM PDT 30.67 469 0 Normal
06/15/2026 05 AM PDT 30.68 472 + Normal
06/15/2026 06 AM PDT 30.68 472 0 Normal
06/15/2026 07 AM PDT 30.68 472 0 Normal
06/15/2026 08 AM PDT 30.69 474 + Normal
06/15/2026 09 AM PDT 30.69 474 0 Normal
06/15/2026 10 AM PDT 30.70 477 + Normal
06/15/2026 11 AM PDT 30.70 477 0 Normal
06/15/2026 12 PM PDT 30.71 479 + Normal
06/15/2026 01 PM PDT 30.71 479 0 Normal
06/15/2026 02 PM PDT 30.72 482 + Normal
06/15/2026 03 PM PDT 30.72 482 0 Normal
06/15/2026 04 PM PDT 30.72 482 0 Normal
06/15/2026 05 PM PDT 30.73 485 + Normal
06/15/2026 06 PM PDT 30.73 485 0 Normal
06/15/2026 07 PM PDT 30.74 487 + Normal
06/15/2026 08 PM PDT 30.74 487 0 Normal
06/15/2026 09 PM PDT 30.75 490 + Normal
06/15/2026 10 PM PDT 30.75 490 0 Normal
06/15/2026 11 PM PDT 30.75 490 0 Normal
06/16/2026 12 AM PDT 30.76 493 + Normal
06/16/2026 01 AM PDT 30.76 493 0 Normal
06/16/2026 02 AM PDT 30.77 495 + Normal
06/16/2026 03 AM PDT 30.77 495 0 Normal
06/16/2026 04 AM PDT 30.77 495 0 Normal
06/16/2026 05 AM PDT 30.78 498 + Normal
06/16/2026 06 AM PDT 30.78 498 0 Normal
06/16/2026 07 AM PDT 30.78 498 0 Normal
06/16/2026 08 AM PDT 30.78 498 0 Normal
06/16/2026 09 AM PDT 30.79 501 + Normal
06/16/2026 10 AM PDT 30.79 501 0 Normal
06/16/2026 11 AM PDT 30.79 501 0 Normal
06/16/2026 12 PM PDT 30.79 501 0 Normal
06/16/2026 01 PM PDT 30.79 501 0 Normal
06/16/2026 02 PM PDT 30.80 503 + Normal
06/16/2026 03 PM PDT 30.80 503 0 Normal
06/16/2026 04 PM PDT 30.80 503 0 Normal
06/16/2026 05 PM PDT 30.80 503 0 Normal
06/16/2026 06 PM PDT 30.80 503 0 Normal
06/16/2026 07 PM PDT 30.80 503 0 Normal
06/16/2026 08 PM PDT 30.80 503 0 Normal
06/16/2026 09 PM PDT 30.80 503 0 Normal
06/16/2026 10 PM PDT 30.81 506 + Normal
06/16/2026 11 PM PDT 30.81 506 0 Normal
06/17/2026 12 AM PDT 30.81 506 0 Normal
06/17/2026 01 AM PDT 30.81 506 0 Normal
06/17/2026 02 AM PDT 30.81 506 0 Normal
06/17/2026 03 AM PDT 30.81 506 0 Normal
06/17/2026 04 AM PDT 30.81 506 0 Normal
06/17/2026 05 AM PDT 30.81 506 0 Normal
06/17/2026 06 AM PDT 30.81 506 0 Normal
06/17/2026 07 AM PDT 30.81 506 0 Normal
06/17/2026 08 AM PDT 30.81 506 0 Normal
06/17/2026 09 AM PDT 30.81 506 0 Normal
06/17/2026 10 AM PDT 30.81 506 0 Normal
06/17/2026 11 AM PDT 30.81 506 0 Normal
06/17/2026 12 PM PDT 30.81 506 0 Normal
06/17/2026 01 PM PDT 30.81 506 0 Normal
06/17/2026 02 PM PDT 30.81 506 0 Normal
06/17/2026 03 PM PDT 30.80 503 - Normal
06/17/2026 04 PM PDT 30.80 503 0 Normal
06/17/2026 05 PM PDT 30.80 503 0 Normal
06/17/2026 06 PM PDT 30.80 503 0 Normal
06/17/2026 07 PM PDT 30.80 503 0 Normal
06/17/2026 08 PM PDT 30.80 503 0 Normal
06/17/2026 09 PM PDT 30.80 503 0 Normal
06/17/2026 10 PM PDT 30.80 503 0 Normal
06/17/2026 11 PM PDT 30.80 503 0 Normal
06/18/2026 12 AM PDT 30.80 503 0 Normal
06/18/2026 01 AM PDT 30.80 503 0 Normal
06/18/2026 02 AM PDT 30.80 503 0 Normal
06/18/2026 03 AM PDT 30.80 503 0 Normal
06/18/2026 04 AM PDT 30.80 503 0 Normal
06/18/2026 05 AM PDT 30.79 501 - Normal
06/18/2026 06 AM PDT 30.79 501 0 Normal
06/18/2026 07 AM PDT 30.79 501 0 Normal
06/18/2026 08 AM PDT 30.79 501 0 Normal
06/18/2026 09 AM PDT 30.79 501 0 Normal
06/18/2026 10 AM PDT 30.79 501 0 Normal
06/18/2026 11 AM PDT 30.79 501 0 Normal
06/18/2026 12 PM PDT 30.79 501 0 Normal
06/18/2026 01 PM PDT 30.79 501 0 Normal
06/18/2026 02 PM PDT 30.78 498 - Normal
06/18/2026 03 PM PDT 30.78 498 0 Normal
06/18/2026 04 PM PDT 30.78 498 0 Normal
06/18/2026 05 PM PDT 30.78 498 0 Normal
06/18/2026 06 PM PDT 30.78 498 0 Normal
06/18/2026 07 PM PDT 30.78 498 0 Normal
06/18/2026 08 PM PDT 30.78 498 0 Normal
06/18/2026 09 PM PDT 30.78 498 0 Normal
06/18/2026 10 PM PDT 30.78 498 0 Normal
06/18/2026 11 PM PDT 30.78 498 0 Normal
06/19/2026 12 AM PDT 30.77 495 - Normal
06/19/2026 01 AM PDT 30.77 495 0 Normal
06/19/2026 02 AM PDT 30.77 495 0 Normal
06/19/2026 03 AM PDT 30.77 495 0 Normal
06/19/2026 04 AM PDT 30.77 495 0 Normal
06/19/2026 05 AM PDT 30.77 495 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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