SAN JOAQUIN RIVER - PATTERSON (PATC1)
Latitude: 37.49º NLongitude: 121.08º WElevation: 97 FeetForecast Type: Official Location
Location: Stanislaus County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Aug 07 2026 at 7:40 AM PDTNext Issuance: Aug 08 2026 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:  08/07/2026 at 07:41 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  08/03/2026 at 01:00 PM PDT
# Maximum Observed Stage:                       32.11 Feet
# Maximum Observed Flow:                        923 cfs
#
# Earliest Date & Time of Maximum Forecast:     08/07/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       31.41 Feet
# Maximum Forecast Flow:                        678 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  08/02/2026 07 AM PDT           31.84            825                        Normal
  08/02/2026 08 AM PDT           31.86            832         +              Normal
  08/02/2026 09 AM PDT           31.91            850         +              Normal
  08/02/2026 10 AM PDT           31.94            861         +              Normal
  08/02/2026 11 AM PDT           31.96            868         +              Normal
  08/02/2026 12 PM PDT           31.98            875         +              Normal
  08/02/2026 01 PM PDT           32.00            883         +              Normal
  08/02/2026 02 PM PDT           32.01            886         +              Normal
  08/02/2026 03 PM PDT           32.02            890         +              Normal
  08/02/2026 04 PM PDT           32.04            897         +              Normal
  08/02/2026 05 PM PDT           32.05            901         +              Normal
  08/02/2026 06 PM PDT           32.05            901         0              Normal
  08/02/2026 07 PM PDT           32.06            905         +              Normal
  08/02/2026 08 PM PDT           32.06            905         0              Normal
  08/02/2026 09 PM PDT           32.08            912         +              Normal
  08/02/2026 10 PM PDT           32.07            908         -              Normal
  08/02/2026 11 PM PDT           32.06            905         -              Normal
  08/03/2026 12 AM PDT           32.08            912         +              Normal
  08/03/2026 01 AM PDT           32.06            905         -              Normal
  08/03/2026 02 AM PDT           32.05            901         -              Normal
  08/03/2026 03 AM PDT           32.06            905         +              Normal
  08/03/2026 04 AM PDT           32.06            905         0              Normal
  08/03/2026 05 AM PDT           32.04            897         -              Normal
  08/03/2026 06 AM PDT           32.07            908         +              Normal
  08/03/2026 07 AM PDT           32.08            912         +              Normal
  08/03/2026 08 AM PDT           32.04            897         -              Normal
  08/03/2026 09 AM PDT           32.06            905         +              Normal
  08/03/2026 10 AM PDT           32.10            919         +              Normal
  08/03/2026 11 AM PDT           32.08            912         -              Normal
  08/03/2026 12 PM PDT           32.10            919         +              Normal
  08/03/2026 01 PM PDT           32.11            923         +              Normal
  08/03/2026 02 PM PDT           32.08            912         -              Normal
  08/03/2026 03 PM PDT           32.10            919         +              Normal
  08/03/2026 04 PM PDT           32.10            919         0              Normal
  08/03/2026 05 PM PDT           32.09            916         -              Normal
  08/03/2026 06 PM PDT           32.08            912         -              Normal
  08/03/2026 07 PM PDT           32.06            905         -              Normal
  08/03/2026 08 PM PDT           32.03            893         -              Normal
  08/03/2026 09 PM PDT           32.02            890         -              Normal
  08/03/2026 10 PM PDT           31.99            879         -              Normal
  08/03/2026 11 PM PDT           31.98            875         -              Normal
  08/04/2026 12 AM PDT           31.96            868         -              Normal
  08/04/2026 01 AM PDT           31.95            864         -              Normal
  08/04/2026 02 AM PDT           31.93            857         -              Normal
  08/04/2026 03 AM PDT           31.92            853         -              Normal
  08/04/2026 04 AM PDT           31.90            846         -              Normal
  08/04/2026 05 AM PDT           31.88            839         -              Normal
  08/04/2026 06 AM PDT           31.88            839         0              Normal
  08/04/2026 07 AM PDT           31.86            832         -              Normal
  08/04/2026 08 AM PDT           31.85            828         -              Normal
  08/04/2026 09 AM PDT           31.85            828         0              Normal
  08/04/2026 10 AM PDT           31.84            825         -              Normal
  08/04/2026 11 AM PDT           31.84            825         0              Normal
  08/04/2026 12 PM PDT           31.85            828         +              Normal
  08/04/2026 01 PM PDT           31.85            828         0              Normal
  08/04/2026 02 PM PDT           31.85            828         0              Normal
  08/04/2026 03 PM PDT           31.83            821         -              Normal
  08/04/2026 04 PM PDT           31.83            821         0              Normal
  08/04/2026 05 PM PDT           31.82            818         -              Normal
  08/04/2026 06 PM PDT           31.81            814         -              Normal
  08/04/2026 07 PM PDT           31.82            818         +              Normal
  08/04/2026 08 PM PDT           31.83            821         +              Normal
  08/04/2026 09 PM PDT           31.80            811         -              Normal
  08/04/2026 10 PM PDT           31.80            811         0              Normal
  08/04/2026 11 PM PDT           31.81            814         +              Normal
  08/05/2026 12 AM PDT           31.79            807         -              Normal
  08/05/2026 01 AM PDT           31.79            807         0              Normal
  08/05/2026 02 AM PDT           31.78            804         -              Normal
  08/05/2026 03 AM PDT           31.77            800         -              Normal
  08/05/2026 04 AM PDT           31.78            804         +              Normal
  08/05/2026 05 AM PDT           31.77            800         -              Normal
  08/05/2026 06 AM PDT           31.75            793         -              Normal
  08/05/2026 07 AM PDT           31.75            793         0              Normal
  08/05/2026 08 AM PDT           31.74            790         -              Normal
  08/05/2026 09 AM PDT           31.73            786         -              Normal
  08/05/2026 10 AM PDT           31.71            779         -              Normal
  08/05/2026 11 AM PDT           31.72            783         +              Normal
  08/05/2026 12 PM PDT           31.74            790         +              Normal
  08/05/2026 01 PM PDT           31.69            772         -              Normal
  08/05/2026 02 PM PDT           31.69            772         0              Normal
  08/05/2026 03 PM PDT           31.68            769         -              Normal
  08/05/2026 04 PM PDT           31.66            762         -              Normal
  08/05/2026 05 PM PDT           31.66            762         0              Normal
  08/05/2026 06 PM PDT           31.65            759         -              Normal
  08/05/2026 07 PM PDT           31.63            752         -              Normal
  08/05/2026 08 PM PDT           31.62            748         -              Normal
  08/05/2026 09 PM PDT           31.62            748         0              Normal
  08/05/2026 10 PM PDT           31.60            742         -              Normal
  08/05/2026 11 PM PDT           31.59            738         -              Normal
  08/06/2026 12 AM PDT           31.58            735         -              Normal
  08/06/2026 01 AM PDT           31.58            735         0              Normal
  08/06/2026 02 AM PDT           31.58            735         0              Normal
  08/06/2026 03 AM PDT           31.57            731         -              Normal
  08/06/2026 04 AM PDT           31.56            728         -              Normal
  08/06/2026 05 AM PDT           31.57            731         +              Normal
  08/06/2026 06 AM PDT           31.57            731         0              Normal
  08/06/2026 07 AM PDT           31.56            728         -              Normal
  08/06/2026 08 AM PDT           31.56            728         0              Normal
  08/06/2026 09 AM PDT           31.57            731         +              Normal
  08/06/2026 10 AM PDT           31.54            721         -              Normal
  08/06/2026 11 AM PDT           31.55            725         +              Normal
  08/06/2026 12 PM PDT           31.59            738         +              Normal
  08/06/2026 01 PM PDT           31.54            721         -              Normal
  08/06/2026 02 PM PDT           31.54            721         0              Normal
  08/06/2026 03 PM PDT           31.53            718         -              Normal
  08/06/2026 04 PM PDT           31.51            711         -              Normal
  08/06/2026 05 PM PDT           31.49            705         -              Normal
  08/06/2026 06 PM PDT           31.48            701         -              Normal
  08/06/2026 07 PM PDT           31.48            701         0              Normal
  08/06/2026 08 PM PDT           31.47            698         -              Normal
  08/06/2026 09 PM PDT           31.47            698         0              Normal
  08/06/2026 10 PM PDT           31.46            695         -              Normal
  08/06/2026 11 PM PDT           31.47            698         +              Normal
  08/07/2026 12 AM PDT           31.45            691         -              Normal
  08/07/2026 01 AM PDT           31.43            685         -              Normal
  08/07/2026 02 AM PDT           31.44            688         +              Normal
  08/07/2026 03 AM PDT           31.41            678         -              Normal
  08/07/2026 04 AM PDT           31.45            691         +              Normal
  08/07/2026 05 AM PDT           31.42            682         -              Normal
  08/07/2026 06 AM PDT           31.41            678         -              Normal
  08/07/2026 07 AM PDT           31.41            678         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  08/07/2026 08 AM PDT           31.41            678                        Normal
  08/07/2026 09 AM PDT           31.40            675         -              Normal
  08/07/2026 10 AM PDT           31.39            672         -              Normal
  08/07/2026 11 AM PDT           31.38            669         -              Normal
  08/07/2026 12 PM PDT           31.37            666         -              Normal
  08/07/2026 01 PM PDT           31.36            663         -              Normal
  08/07/2026 02 PM PDT           31.35            660         -              Normal
  08/07/2026 03 PM PDT           31.34            657         -              Normal
  08/07/2026 04 PM PDT           31.33            654         -              Normal
  08/07/2026 05 PM PDT           31.32            651         -              Normal
  08/07/2026 06 PM PDT           31.31            648         -              Normal
  08/07/2026 07 PM PDT           31.30            645         -              Normal
  08/07/2026 08 PM PDT           31.29            642         -              Normal
  08/07/2026 09 PM PDT           31.28            639         -              Normal
  08/07/2026 10 PM PDT           31.27            636         -              Normal
  08/07/2026 11 PM PDT           31.26            633         -              Normal
  08/08/2026 12 AM PDT           31.25            630         -              Normal
  08/08/2026 01 AM PDT           31.24            627         -              Normal
  08/08/2026 02 AM PDT           31.23            624         -              Normal
  08/08/2026 03 AM PDT           31.22            622         -              Normal
  08/08/2026 04 AM PDT           31.21            619         -              Normal
  08/08/2026 05 AM PDT           31.20            616         -              Normal
  08/08/2026 06 AM PDT           31.19            613         -              Normal
  08/08/2026 07 AM PDT           31.18            610         -              Normal
  08/08/2026 08 AM PDT           31.17            607         -              Normal
  08/08/2026 09 AM PDT           31.16            604         -              Normal
  08/08/2026 10 AM PDT           31.15            601         -              Normal
  08/08/2026 11 AM PDT           31.14            598         -              Normal
  08/08/2026 12 PM PDT           31.13            595         -              Normal
  08/08/2026 01 PM PDT           31.12            593         -              Normal
  08/08/2026 02 PM PDT           31.11            590         -              Normal
  08/08/2026 03 PM PDT           31.10            587         -              Normal
  08/08/2026 04 PM PDT           31.09            584         -              Normal
  08/08/2026 05 PM PDT           31.08            581         -              Normal
  08/08/2026 06 PM PDT           31.07            578         -              Normal
  08/08/2026 07 PM PDT           31.06            575         -              Normal
  08/08/2026 08 PM PDT           31.05            573         -              Normal
  08/08/2026 09 PM PDT           31.04            570         -              Normal
  08/08/2026 10 PM PDT           31.03            567         -              Normal
  08/08/2026 11 PM PDT           31.02            564         -              Normal
  08/09/2026 12 AM PDT           31.01            561         -              Normal
  08/09/2026 01 AM PDT           31.00            559         -              Normal
  08/09/2026 02 AM PDT           30.98            553         -              Normal
  08/09/2026 03 AM PDT           30.98            553         0              Normal
  08/09/2026 04 AM PDT           30.96            547         -              Normal
  08/09/2026 05 AM PDT           30.95            545         -              Normal
  08/09/2026 06 AM PDT           30.94            542         -              Normal
  08/09/2026 07 AM PDT           30.93            539         -              Normal
  08/09/2026 08 AM PDT           30.92            536         -              Normal
  08/09/2026 09 AM PDT           30.90            531         -              Normal
  08/09/2026 10 AM PDT           30.89            528         -              Normal
  08/09/2026 11 AM PDT           30.88            525         -              Normal
  08/09/2026 12 PM PDT           30.87            523         -              Normal
  08/09/2026 01 PM PDT           30.86            520         -              Normal
  08/09/2026 02 PM PDT           30.84            514         -              Normal
  08/09/2026 03 PM PDT           30.83            512         -              Normal
  08/09/2026 04 PM PDT           30.82            509         -              Normal
  08/09/2026 05 PM PDT           30.80            503         -              Normal
  08/09/2026 06 PM PDT           30.79            501         -              Normal
  08/09/2026 07 PM PDT           30.78            498         -              Normal
  08/09/2026 08 PM PDT           30.77            495         -              Normal
  08/09/2026 09 PM PDT           30.76            493         -              Normal
  08/09/2026 10 PM PDT           30.75            490         -              Normal
  08/09/2026 11 PM PDT           30.73            485         -              Normal
  08/10/2026 12 AM PDT           30.72            482         -              Normal
  08/10/2026 01 AM PDT           30.71            479         -              Normal
  08/10/2026 02 AM PDT           30.69            474         -              Normal
  08/10/2026 03 AM PDT           30.68            472         -              Normal
  08/10/2026 04 AM PDT           30.67            469         -              Normal
  08/10/2026 05 AM PDT           30.66            466         -              Normal
  08/10/2026 06 AM PDT           30.64            461         -              Normal
  08/10/2026 07 AM PDT           30.63            458         -              Normal
  08/10/2026 08 AM PDT           30.62            456         -              Normal
  08/10/2026 09 AM PDT           30.61            453         -              Normal
  08/10/2026 10 AM PDT           30.60            451         -              Normal
  08/10/2026 11 AM PDT           30.59            448         -              Normal
  08/10/2026 12 PM PDT           30.58            445         -              Normal
  08/10/2026 01 PM PDT           30.57            443         -              Normal
  08/10/2026 02 PM PDT           30.56            440         -              Normal
  08/10/2026 03 PM PDT           30.55            438         -              Normal
  08/10/2026 04 PM PDT           30.54            435         -              Normal
  08/10/2026 05 PM PDT           30.53            433         -              Normal
  08/10/2026 06 PM PDT           30.52            430         -              Normal
  08/10/2026 07 PM PDT           30.51            428         -              Normal
  08/10/2026 08 PM PDT           30.50            425         -              Normal
  08/10/2026 09 PM PDT           30.50            425         0              Normal
  08/10/2026 10 PM PDT           30.49            423         -              Normal
  08/10/2026 11 PM PDT           30.48            420         -              Normal
  08/11/2026 12 AM PDT           30.47            417         -              Normal
  08/11/2026 01 AM PDT           30.47            417         0              Normal
  08/11/2026 02 AM PDT           30.46            415         -              Normal
  08/11/2026 03 AM PDT           30.45            412         -              Normal
  08/11/2026 04 AM PDT           30.45            412         0              Normal
  08/11/2026 05 AM PDT           30.44            410         -              Normal
  08/11/2026 06 AM PDT           30.44            410         0              Normal
  08/11/2026 07 AM PDT           30.43            407         -              Normal
  08/11/2026 08 AM PDT           30.43            407         0              Normal
  08/11/2026 09 AM PDT           30.42            405         -              Normal
  08/11/2026 10 AM PDT           30.41            402         -              Normal
  08/11/2026 11 AM PDT           30.41            402         0              Normal
  08/11/2026 12 PM PDT           30.41            402         0              Normal
  08/11/2026 01 PM PDT           30.40            400         -              Normal
  08/11/2026 02 PM PDT           30.40            400         0              Normal
  08/11/2026 03 PM PDT           30.39            398         -              Normal
  08/11/2026 04 PM PDT           30.39            398         0              Normal
  08/11/2026 05 PM PDT           30.39            398         0              Normal
  08/11/2026 06 PM PDT           30.38            395         -              Normal
  08/11/2026 07 PM PDT           30.38            395         0              Normal
  08/11/2026 08 PM PDT           30.38            395         0              Normal
  08/11/2026 09 PM PDT           30.37            393         -              Normal
  08/11/2026 10 PM PDT           30.37            393         0              Normal
  08/11/2026 11 PM PDT           30.37            393         0              Normal
  08/12/2026 12 AM PDT           30.37            393         0              Normal
  08/12/2026 01 AM PDT           30.36            390         -              Normal
  08/12/2026 02 AM PDT           30.36            390         0              Normal
  08/12/2026 03 AM PDT           30.36            390         0              Normal
  08/12/2026 04 AM PDT           30.36            390         0              Normal
  08/12/2026 05 AM PDT           30.36            390         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.