National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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SAN JOAQUIN RIVER - PATTERSON (PATC1)
Latitude: 37.49º NLongitude: 121.08º WElevation: 97 Feet
Location: Stanislaus County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Jul 07 2025 at 7:14 AM PDTNext Issuance: Jul 08 2025 at 9:00 AM PDT
Action/Monitor: 48.0 FeetMinor Flood: 54.7 FeetModerate Flood: 57.3 FeetMajor Flood: 58.3 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Patterson (PATC1)
#
# File Generation Time:  07/07/2025 at 07:14 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  07/07/2025 at 07:00 AM PDT
# Maximum Observed Stage:                       30.60 Feet
# Maximum Observed Flow:                        448 cfs
#
# Earliest Date & Time of Maximum Forecast:     07/08/2025 at 03:00 AM PDT
# Maximum Forecast Stage:                       30.70 Feet
# Maximum Forecast Flow:                        472 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/02/2025 07 AM PDT           29.99            317                        Normal
  07/02/2025 08 AM PDT           29.98            315         -              Normal
  07/02/2025 09 AM PDT           29.96            311         -              Normal
  07/02/2025 10 AM PDT           29.98            315         +              Normal
  07/02/2025 11 AM PDT           30.00            319         +              Normal
  07/02/2025 12 PM PDT           30.02            323         +              Normal
  07/02/2025 01 PM PDT           30.01            321         -              Normal
  07/02/2025 02 PM PDT           30.03            325         +              Normal
  07/02/2025 03 PM PDT           30.03            325         0              Normal
  07/02/2025 04 PM PDT           30.02            323         -              Normal
  07/02/2025 05 PM PDT           30.00            319         -              Normal
  07/02/2025 06 PM PDT           29.99            317         -              Normal
  07/02/2025 07 PM PDT           29.99            317         0              Normal
  07/02/2025 08 PM PDT           30.00            319         +              Normal
  07/02/2025 09 PM PDT           29.99            317         -              Normal
  07/02/2025 10 PM PDT           29.99            317         0              Normal
  07/02/2025 11 PM PDT           29.99            317         0              Normal
  07/03/2025 12 AM PDT           29.99            317         0              Normal
  07/03/2025 01 AM PDT           29.99            317         0              Normal
  07/03/2025 02 AM PDT           29.99            317         0              Normal
  07/03/2025 03 AM PDT           30.00            319         +              Normal
  07/03/2025 04 AM PDT           30.01            321         +              Normal
  07/03/2025 05 AM PDT           30.00            319         -              Normal
  07/03/2025 06 AM PDT           29.99            317         -              Normal
  07/03/2025 07 AM PDT           30.00            319         +              Normal
  07/03/2025 08 AM PDT           29.99            317         -              Normal
  07/03/2025 09 AM PDT           29.97            313         -              Normal
  07/03/2025 10 AM PDT           29.96            311         -              Normal
  07/03/2025 11 AM PDT           29.95            309         -              Normal
  07/03/2025 12 PM PDT           29.95            309         0              Normal
  07/03/2025 01 PM PDT           29.96            311         +              Normal
  07/03/2025 02 PM PDT           29.99            317         +              Normal
  07/03/2025 03 PM PDT           30.00            319         +              Normal
  07/03/2025 04 PM PDT           30.00            319         0              Normal
  07/03/2025 05 PM PDT           30.01            321         +              Normal
  07/03/2025 06 PM PDT           29.98            315         -              Normal
  07/03/2025 07 PM PDT           29.96            311         -              Normal
  07/03/2025 08 PM PDT           29.95            309         -              Normal
  07/03/2025 09 PM PDT           29.92            303         -              Normal
  07/03/2025 10 PM PDT           29.93            305         +              Normal
  07/03/2025 11 PM PDT           29.92            303         -              Normal
  07/04/2025 12 AM PDT           29.92            303         0              Normal
  07/04/2025 01 AM PDT           29.91            301         -              Normal
  07/04/2025 02 AM PDT           29.89            297         -              Normal
  07/04/2025 03 AM PDT           29.86            291         -              Normal
  07/04/2025 04 AM PDT           29.83            285         -              Normal
  07/04/2025 05 AM PDT           29.80            280         -              Normal
  07/04/2025 06 AM PDT           29.77            274         -              Normal
  07/04/2025 07 AM PDT           29.75            270         -              Normal
  07/04/2025 08 AM PDT           29.73            266         -              Normal
  07/04/2025 09 AM PDT           29.73            266         0              Normal
  07/04/2025 10 AM PDT           29.74            268         +              Normal
  07/04/2025 11 AM PDT           29.76            272         +              Normal
  07/04/2025 12 PM PDT           29.80            280         +              Normal
  07/04/2025 01 PM PDT           29.84            287         +              Normal
  07/04/2025 02 PM PDT           29.93            305         +              Normal
  07/04/2025 03 PM PDT           29.97            313         +              Normal
  07/04/2025 04 PM PDT           30.03            325         +              Normal
  07/04/2025 05 PM PDT           30.08            335         +              Normal
  07/04/2025 06 PM PDT           30.08            335         0              Normal
  07/04/2025 07 PM PDT           30.10            339         +              Normal
  07/04/2025 08 PM PDT           30.09            337         -              Normal
  07/04/2025 09 PM PDT           30.07            333         -              Normal
  07/04/2025 10 PM PDT           30.06            331         -              Normal
  07/04/2025 11 PM PDT           30.05            329         -              Normal
  07/05/2025 12 AM PDT           30.02            323         -              Normal
  07/05/2025 01 AM PDT           30.00            319         -              Normal
  07/05/2025 02 AM PDT           29.98            315         -              Normal
  07/05/2025 03 AM PDT           29.98            315         0              Normal
  07/05/2025 04 AM PDT           29.98            315         0              Normal
  07/05/2025 05 AM PDT           29.99            317         +              Normal
  07/05/2025 06 AM PDT           29.97            313         -              Normal
  07/05/2025 07 AM PDT           29.96            311         -              Normal
  07/05/2025 08 AM PDT           30.00            319         +              Normal
  07/05/2025 09 AM PDT           30.01            321         +              Normal
  07/05/2025 10 AM PDT           30.04            327         +              Normal
  07/05/2025 11 AM PDT           30.08            335         +              Normal
  07/05/2025 12 PM PDT           30.09            337         +              Normal
  07/05/2025 01 PM PDT           30.11            341         +              Normal
  07/05/2025 02 PM PDT           30.12            343         +              Normal
  07/05/2025 03 PM PDT           30.14            347         +              Normal
  07/05/2025 04 PM PDT           30.13            345         -              Normal
  07/05/2025 05 PM PDT           30.13            345         0              Normal
  07/05/2025 06 PM PDT           30.13            345         0              Normal
  07/05/2025 07 PM PDT           30.09            337         -              Normal
  07/05/2025 08 PM PDT           30.11            341         +              Normal
  07/05/2025 09 PM PDT           30.10            339         -              Normal
  07/05/2025 10 PM PDT           30.07            333         -              Normal
  07/05/2025 11 PM PDT           30.07            333         0              Normal
  07/06/2025 12 AM PDT           30.06            331         -              Normal
  07/06/2025 01 AM PDT           30.04            327         -              Normal
  07/06/2025 02 AM PDT           30.04            327         0              Normal
  07/06/2025 03 AM PDT           30.05            329         +              Normal
  07/06/2025 04 AM PDT           30.06            331         +              Normal
  07/06/2025 05 AM PDT           30.08            335         +              Normal
  07/06/2025 06 AM PDT           30.09            337         +              Normal
  07/06/2025 07 AM PDT           30.12            343         +              Normal
  07/06/2025 08 AM PDT           30.17            353         +              Normal
  07/06/2025 09 AM PDT           30.26            373         +              Normal
  07/06/2025 10 AM PDT           30.29            379         +              Normal
  07/06/2025 11 AM PDT           30.42            408         +              Normal
  07/06/2025 12 PM PDT           30.40            403         -              Normal
  07/06/2025 01 PM PDT           30.46            416         +              Normal
  07/06/2025 02 PM PDT           30.51            428         +              Normal
  07/06/2025 03 PM PDT           30.53            432         +              Normal
  07/06/2025 04 PM PDT           30.59            446         +              Normal
  07/06/2025 05 PM PDT           30.57            441         -              Normal
  07/06/2025 06 PM PDT           30.58            444         +              Normal
  07/06/2025 07 PM PDT           30.59            446         +              Normal
  07/06/2025 08 PM PDT           30.57            441         -              Normal
  07/06/2025 09 PM PDT           30.57            441         0              Normal
  07/06/2025 10 PM PDT           30.57            441         0              Normal
  07/06/2025 11 PM PDT           30.56            439         -              Normal
  07/07/2025 12 AM PDT           30.57            441         +              Normal
  07/07/2025 01 AM PDT           30.57            441         0              Normal
  07/07/2025 02 AM PDT           30.58            444         +              Normal
  07/07/2025 03 AM PDT           30.59            446         +              Normal
  07/07/2025 04 AM PDT           30.59            446         0              Normal
  07/07/2025 05 AM PDT           30.59            446         0              Normal
  07/07/2025 06 AM PDT           30.59            446         0              Normal
  07/07/2025 07 AM PDT           30.60            448         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  07/07/2025 08 AM PDT           30.61            451                        Normal
  07/07/2025 09 AM PDT           30.61            451         0              Normal
  07/07/2025 10 AM PDT           30.62            453         +              Normal
  07/07/2025 11 AM PDT           30.62            453         0              Normal
  07/07/2025 12 PM PDT           30.63            455         +              Normal
  07/07/2025 01 PM PDT           30.63            455         0              Normal
  07/07/2025 02 PM PDT           30.64            458         +              Normal
  07/07/2025 03 PM PDT           30.64            458         0              Normal
  07/07/2025 04 PM PDT           30.65            460         +              Normal
  07/07/2025 05 PM PDT           30.66            462         +              Normal
  07/07/2025 06 PM PDT           30.66            462         0              Normal
  07/07/2025 07 PM PDT           30.67            465         +              Normal
  07/07/2025 08 PM PDT           30.67            465         0              Normal
  07/07/2025 09 PM PDT           30.68            467         +              Normal
  07/07/2025 10 PM PDT           30.68            467         0              Normal
  07/07/2025 11 PM PDT           30.68            467         0              Normal
  07/08/2025 12 AM PDT           30.69            470         +              Normal
  07/08/2025 01 AM PDT           30.69            470         0              Normal
  07/08/2025 02 AM PDT           30.69            470         0              Normal
  07/08/2025 03 AM PDT           30.70            472         +              Normal
  07/08/2025 04 AM PDT           30.70            472         0              Normal
  07/08/2025 05 AM PDT           30.70            472         0              Normal
  07/08/2025 06 AM PDT           30.70            472         0              Normal
  07/08/2025 07 AM PDT           30.70            472         0              Normal
  07/08/2025 08 AM PDT           30.70            472         0              Normal
  07/08/2025 09 AM PDT           30.70            472         0              Normal
  07/08/2025 10 AM PDT           30.69            470         -              Normal
  07/08/2025 11 AM PDT           30.69            470         0              Normal
  07/08/2025 12 PM PDT           30.69            470         0              Normal
  07/08/2025 01 PM PDT           30.69            470         0              Normal
  07/08/2025 02 PM PDT           30.68            467         -              Normal
  07/08/2025 03 PM PDT           30.68            467         0              Normal
  07/08/2025 04 PM PDT           30.68            467         0              Normal
  07/08/2025 05 PM PDT           30.68            467         0              Normal
  07/08/2025 06 PM PDT           30.67            465         -              Normal
  07/08/2025 07 PM PDT           30.67            465         0              Normal
  07/08/2025 08 PM PDT           30.67            465         0              Normal
  07/08/2025 09 PM PDT           30.66            462         -              Normal
  07/08/2025 10 PM PDT           30.66            462         0              Normal
  07/08/2025 11 PM PDT           30.66            462         0              Normal
  07/09/2025 12 AM PDT           30.66            462         0              Normal
  07/09/2025 01 AM PDT           30.65            460         -              Normal
  07/09/2025 02 AM PDT           30.65            460         0              Normal
  07/09/2025 03 AM PDT           30.65            460         0              Normal
  07/09/2025 04 AM PDT           30.64            458         -              Normal
  07/09/2025 05 AM PDT           30.64            458         0              Normal
  07/09/2025 06 AM PDT           30.64            458         0              Normal
  07/09/2025 07 AM PDT           30.64            458         0              Normal
  07/09/2025 08 AM PDT           30.63            455         -              Normal
  07/09/2025 09 AM PDT           30.63            455         0              Normal
  07/09/2025 10 AM PDT           30.63            455         0              Normal
  07/09/2025 11 AM PDT           30.62            453         -              Normal
  07/09/2025 12 PM PDT           30.62            453         0              Normal
  07/09/2025 01 PM PDT           30.61            451         -              Normal
  07/09/2025 02 PM PDT           30.61            451         0              Normal
  07/09/2025 03 PM PDT           30.61            451         0              Normal
  07/09/2025 04 PM PDT           30.60            448         -              Normal
  07/09/2025 05 PM PDT           30.60            448         0              Normal
  07/09/2025 06 PM PDT           30.60            448         0              Normal
  07/09/2025 07 PM PDT           30.59            446         -              Normal
  07/09/2025 08 PM PDT           30.59            446         0              Normal
  07/09/2025 09 PM PDT           30.59            446         0              Normal
  07/09/2025 10 PM PDT           30.58            444         -              Normal
  07/09/2025 11 PM PDT           30.58            444         0              Normal
  07/10/2025 12 AM PDT           30.57            441         -              Normal
  07/10/2025 01 AM PDT           30.57            441         0              Normal
  07/10/2025 02 AM PDT           30.57            441         0              Normal
  07/10/2025 03 AM PDT           30.56            439         -              Normal
  07/10/2025 04 AM PDT           30.56            439         0              Normal
  07/10/2025 05 AM PDT           30.56            439         0              Normal
  07/10/2025 06 AM PDT           30.55            437         -              Normal
  07/10/2025 07 AM PDT           30.55            437         0              Normal
  07/10/2025 08 AM PDT           30.55            437         0              Normal
  07/10/2025 09 AM PDT           30.55            437         0              Normal
  07/10/2025 10 AM PDT           30.54            435         -              Normal
  07/10/2025 11 AM PDT           30.54            435         0              Normal
  07/10/2025 12 PM PDT           30.54            435         0              Normal
  07/10/2025 01 PM PDT           30.53            432         -              Normal
  07/10/2025 02 PM PDT           30.53            432         0              Normal
  07/10/2025 03 PM PDT           30.53            432         0              Normal
  07/10/2025 04 PM PDT           30.52            430         -              Normal
  07/10/2025 05 PM PDT           30.52            430         0              Normal
  07/10/2025 06 PM PDT           30.52            430         0              Normal
  07/10/2025 07 PM PDT           30.52            430         0              Normal
  07/10/2025 08 PM PDT           30.51            428         -              Normal
  07/10/2025 09 PM PDT           30.51            428         0              Normal
  07/10/2025 10 PM PDT           30.51            428         0              Normal
  07/10/2025 11 PM PDT           30.51            428         0              Normal
  07/11/2025 12 AM PDT           30.50            425         -              Normal
  07/11/2025 01 AM PDT           30.50            425         0              Normal
  07/11/2025 02 AM PDT           30.50            425         0              Normal
  07/11/2025 03 AM PDT           30.50            425         0              Normal
  07/11/2025 04 AM PDT           30.50            425         0              Normal
  07/11/2025 05 AM PDT           30.50            425         0              Normal
  07/11/2025 06 AM PDT           30.50            425         0              Normal
  07/11/2025 07 AM PDT           30.49            423         -              Normal
  07/11/2025 08 AM PDT           30.49            423         0              Normal
  07/11/2025 09 AM PDT           30.49            423         0              Normal
  07/11/2025 10 AM PDT           30.49            423         0              Normal
  07/11/2025 11 AM PDT           30.49            423         0              Normal
  07/11/2025 12 PM PDT           30.48            421         -              Normal
  07/11/2025 01 PM PDT           30.48            421         0              Normal
  07/11/2025 02 PM PDT           30.48            421         0              Normal
  07/11/2025 03 PM PDT           30.48            421         0              Normal
  07/11/2025 04 PM PDT           30.48            421         0              Normal
  07/11/2025 05 PM PDT           30.48            421         0              Normal
  07/11/2025 06 PM PDT           30.47            419         -              Normal
  07/11/2025 07 PM PDT           30.47            419         0              Normal
  07/11/2025 08 PM PDT           30.47            419         0              Normal
  07/11/2025 09 PM PDT           30.47            419         0              Normal
  07/11/2025 10 PM PDT           30.47            419         0              Normal
  07/11/2025 11 PM PDT           30.47            419         0              Normal
  07/12/2025 12 AM PDT           30.46            416         -              Normal
  07/12/2025 01 AM PDT           30.46            416         0              Normal
  07/12/2025 02 AM PDT           30.46            416         0              Normal
  07/12/2025 03 AM PDT           30.46            416         0              Normal
  07/12/2025 04 AM PDT           30.46            416         0              Normal
  07/12/2025 05 AM PDT           30.46            416         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.