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 02 2026 at 7:32 AM PDTNext Issuance: Aug 03 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:  08/02/2026 at 07:32 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  08/02/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       31.82 Feet
# Maximum Observed Flow:                        818 cfs
#
# Earliest Date & Time of Maximum Forecast:     08/03/2026 at 09:00 PM PDT
# Maximum Forecast Stage:                       31.94 Feet
# Maximum Forecast Flow:                        861 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/28/2026 07 AM PDT           31.51            711                        Normal
  07/28/2026 08 AM PDT           31.48            701         -              Normal
  07/28/2026 09 AM PDT           31.51            711         +              Normal
  07/28/2026 10 AM PDT           31.51            711         0              Normal
  07/28/2026 11 AM PDT           31.49            705         -              Normal
  07/28/2026 12 PM PDT           31.50            708         +              Normal
  07/28/2026 01 PM PDT           31.52            715         +              Normal
  07/28/2026 02 PM PDT           31.51            711         -              Normal
  07/28/2026 03 PM PDT           31.53            718         +              Normal
  07/28/2026 04 PM PDT           31.54            721         +              Normal
  07/28/2026 05 PM PDT           31.52            715         -              Normal
  07/28/2026 06 PM PDT           31.53            718         +              Normal
  07/28/2026 07 PM PDT           31.52            715         -              Normal
  07/28/2026 08 PM PDT           31.52            715         0              Normal
  07/28/2026 09 PM PDT           31.51            711         -              Normal
  07/28/2026 10 PM PDT           31.51            711         0              Normal
  07/28/2026 11 PM PDT           31.49            705         -              Normal
  07/29/2026 12 AM PDT           31.49            705         0              Normal
  07/29/2026 01 AM PDT           31.49            705         0              Normal
  07/29/2026 02 AM PDT           31.48            701         -              Normal
  07/29/2026 03 AM PDT           31.47            698         -              Normal
  07/29/2026 04 AM PDT           31.45            691         -              Normal
  07/29/2026 05 AM PDT           31.46            695         +              Normal
  07/29/2026 06 AM PDT           31.46            695         0              Normal
  07/29/2026 07 AM PDT           31.43            685         -              Normal
  07/29/2026 08 AM PDT           31.44            688         +              Normal
  07/29/2026 09 AM PDT           31.46            695         +              Normal
  07/29/2026 10 AM PDT           31.45            691         -              Normal
  07/29/2026 11 AM PDT           31.47            698         +              Normal
  07/29/2026 12 PM PDT           31.46            695         -              Normal
  07/29/2026 01 PM PDT           31.47            698         +              Normal
  07/29/2026 02 PM PDT           31.48            701         +              Normal
  07/29/2026 03 PM PDT           31.48            701         0              Normal
  07/29/2026 04 PM PDT           31.49            705         +              Normal
  07/29/2026 05 PM PDT           31.49            705         0              Normal
  07/29/2026 06 PM PDT           31.49            705         0              Normal
  07/29/2026 07 PM PDT           31.48            701         -              Normal
  07/29/2026 08 PM PDT           31.48            701         0              Normal
  07/29/2026 09 PM PDT           31.47            698         -              Normal
  07/29/2026 10 PM PDT           31.46            695         -              Normal
  07/29/2026 11 PM PDT           31.46            695         0              Normal
  07/30/2026 12 AM PDT           31.45            691         -              Normal
  07/30/2026 01 AM PDT           31.44            688         -              Normal
  07/30/2026 02 AM PDT           31.43            685         -              Normal
  07/30/2026 03 AM PDT           31.42            682         -              Normal
  07/30/2026 04 AM PDT           31.42            682         0              Normal
  07/30/2026 05 AM PDT           31.42            682         0              Normal
  07/30/2026 06 AM PDT           31.43            685         +              Normal
  07/30/2026 07 AM PDT           31.42            682         -              Normal
  07/30/2026 08 AM PDT           31.45            691         +              Normal
  07/30/2026 09 AM PDT           31.44            688         -              Normal
  07/30/2026 10 AM PDT           31.42            682         -              Normal
  07/30/2026 11 AM PDT           31.42            682         0              Normal
  07/30/2026 12 PM PDT           31.42            682         0              Normal
  07/30/2026 01 PM PDT           31.45            691         +              Normal
  07/30/2026 02 PM PDT           31.47            698         +              Normal
  07/30/2026 03 PM PDT           31.48            701         +              Normal
  07/30/2026 04 PM PDT           31.49            705         +              Normal
  07/30/2026 05 PM PDT           31.50            708         +              Normal
  07/30/2026 06 PM PDT           31.52            715         +              Normal
  07/30/2026 07 PM PDT           31.51            711         -              Normal
  07/30/2026 08 PM PDT           31.52            715         +              Normal
  07/30/2026 09 PM PDT           31.53            718         +              Normal
  07/30/2026 10 PM PDT           31.53            718         0              Normal
  07/30/2026 11 PM PDT           31.55            725         +              Normal
  07/31/2026 12 AM PDT           31.55            725         0              Normal
  07/31/2026 01 AM PDT           31.56            728         +              Normal
  07/31/2026 02 AM PDT           31.57            731         +              Normal
  07/31/2026 03 AM PDT           31.58            735         +              Normal
  07/31/2026 04 AM PDT           31.58            735         0              Normal
  07/31/2026 05 AM PDT           31.59            738         +              Normal
  07/31/2026 06 AM PDT           31.60            742         +              Normal
  07/31/2026 07 AM PDT           31.59            738         -              Normal
  07/31/2026 08 AM PDT           31.60            742         +              Normal
  07/31/2026 09 AM PDT           31.62            748         +              Normal
  07/31/2026 10 AM PDT           31.66            762         +              Normal
  07/31/2026 11 AM PDT           31.67            765         +              Normal
  07/31/2026 12 PM PDT           31.69            772         +              Normal
  07/31/2026 01 PM PDT           31.73            786         +              Normal
  07/31/2026 02 PM PDT           31.73            786         0              Normal
  07/31/2026 03 PM PDT           31.73            786         0              Normal
  07/31/2026 04 PM PDT           31.76            797         +              Normal
  07/31/2026 05 PM PDT           31.76            797         0              Normal
  07/31/2026 06 PM PDT           31.78            804         +              Normal
  07/31/2026 07 PM PDT           31.78            804         0              Normal
  07/31/2026 08 PM PDT           31.78            804         0              Normal
  07/31/2026 09 PM PDT           31.77            800         -              Normal
  07/31/2026 10 PM PDT           31.74            790         -              Normal
  07/31/2026 11 PM PDT           31.78            804         +              Normal
  08/01/2026 12 AM PDT           31.74            790         -              Normal
  08/01/2026 01 AM PDT           31.73            786         -              Normal
  08/01/2026 02 AM PDT           31.75            793         +              Normal
  08/01/2026 03 AM PDT           31.74            790         -              Normal
  08/01/2026 04 AM PDT           31.70            776         -              Normal
  08/01/2026 05 AM PDT           31.70            776         0              Normal
  08/01/2026 06 AM PDT           31.70            776         0              Normal
  08/01/2026 07 AM PDT           31.67            765         -              Normal
  08/01/2026 08 AM PDT           31.66            762         -              Normal
  08/01/2026 09 AM PDT           31.66            762         0              Normal
  08/01/2026 10 AM PDT           31.65            759         -              Normal
  08/01/2026 11 AM PDT           31.67            765         +              Normal
  08/01/2026 12 PM PDT           31.68            769         +              Normal
  08/01/2026 01 PM PDT           31.69            772         +              Normal
  08/01/2026 02 PM PDT           31.71            779         +              Normal
  08/01/2026 03 PM PDT           31.70            776         -              Normal
  08/01/2026 04 PM PDT           31.70            776         0              Normal
  08/01/2026 05 PM PDT           31.70            776         0              Normal
  08/01/2026 06 PM PDT           31.73            786         +              Normal
  08/01/2026 07 PM PDT           31.70            776         -              Normal
  08/01/2026 08 PM PDT           31.72            783         +              Normal
  08/01/2026 09 PM PDT           31.75            793         +              Normal
  08/01/2026 10 PM PDT           31.73            786         -              Normal
  08/01/2026 11 PM PDT           31.74            790         +              Normal
  08/02/2026 12 AM PDT           31.77            800         +              Normal
  08/02/2026 01 AM PDT           31.75            793         -              Normal
  08/02/2026 02 AM PDT           31.78            804         +              Normal
  08/02/2026 03 AM PDT           31.79            807         +              Normal
  08/02/2026 04 AM PDT           31.79            807         0              Normal
  08/02/2026 05 AM PDT           31.81            814         +              Normal
  08/02/2026 06 AM PDT           31.82            818         +              Normal
  08/02/2026 07 AM PDT           31.82            818         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  08/02/2026 08 AM PDT           31.82            818                        Normal
  08/02/2026 09 AM PDT           31.83            821         +              Normal
  08/02/2026 10 AM PDT           31.83            821         0              Normal
  08/02/2026 11 AM PDT           31.84            825         +              Normal
  08/02/2026 12 PM PDT           31.84            825         0              Normal
  08/02/2026 01 PM PDT           31.84            825         0              Normal
  08/02/2026 02 PM PDT           31.85            828         +              Normal
  08/02/2026 03 PM PDT           31.85            828         0              Normal
  08/02/2026 04 PM PDT           31.85            828         0              Normal
  08/02/2026 05 PM PDT           31.86            832         +              Normal
  08/02/2026 06 PM PDT           31.86            832         0              Normal
  08/02/2026 07 PM PDT           31.86            832         0              Normal
  08/02/2026 08 PM PDT           31.86            832         0              Normal
  08/02/2026 09 PM PDT           31.87            836         +              Normal
  08/02/2026 10 PM PDT           31.87            836         0              Normal
  08/02/2026 11 PM PDT           31.88            839         +              Normal
  08/03/2026 12 AM PDT           31.88            839         0              Normal
  08/03/2026 01 AM PDT           31.88            839         0              Normal
  08/03/2026 02 AM PDT           31.89            843         +              Normal
  08/03/2026 03 AM PDT           31.89            843         0              Normal
  08/03/2026 04 AM PDT           31.89            843         0              Normal
  08/03/2026 05 AM PDT           31.90            846         +              Normal
  08/03/2026 06 AM PDT           31.90            846         0              Normal
  08/03/2026 07 AM PDT           31.90            846         0              Normal
  08/03/2026 08 AM PDT           31.91            850         +              Normal
  08/03/2026 09 AM PDT           31.91            850         0              Normal
  08/03/2026 10 AM PDT           31.91            850         0              Normal
  08/03/2026 11 AM PDT           31.92            853         +              Normal
  08/03/2026 12 PM PDT           31.92            853         0              Normal
  08/03/2026 01 PM PDT           31.92            853         0              Normal
  08/03/2026 02 PM PDT           31.93            857         +              Normal
  08/03/2026 03 PM PDT           31.93            857         0              Normal
  08/03/2026 04 PM PDT           31.93            857         0              Normal
  08/03/2026 05 PM PDT           31.93            857         0              Normal
  08/03/2026 06 PM PDT           31.93            857         0              Normal
  08/03/2026 07 PM PDT           31.93            857         0              Normal
  08/03/2026 08 PM PDT           31.93            857         0              Normal
  08/03/2026 09 PM PDT           31.94            861         +              Normal
  08/03/2026 10 PM PDT           31.94            861         0              Normal
  08/03/2026 11 PM PDT           31.94            861         0              Normal
  08/04/2026 12 AM PDT           31.94            861         0              Normal
  08/04/2026 01 AM PDT           31.93            857         -              Normal
  08/04/2026 02 AM PDT           31.93            857         0              Normal
  08/04/2026 03 AM PDT           31.93            857         0              Normal
  08/04/2026 04 AM PDT           31.93            857         0              Normal
  08/04/2026 05 AM PDT           31.93            857         0              Normal
  08/04/2026 06 AM PDT           31.92            853         -              Normal
  08/04/2026 07 AM PDT           31.92            853         0              Normal
  08/04/2026 08 AM PDT           31.91            850         -              Normal
  08/04/2026 09 AM PDT           31.91            850         0              Normal
  08/04/2026 10 AM PDT           31.90            846         -              Normal
  08/04/2026 11 AM PDT           31.90            846         0              Normal
  08/04/2026 12 PM PDT           31.89            843         -              Normal
  08/04/2026 01 PM PDT           31.89            843         0              Normal
  08/04/2026 02 PM PDT           31.88            839         -              Normal
  08/04/2026 03 PM PDT           31.87            836         -              Normal
  08/04/2026 04 PM PDT           31.86            832         -              Normal
  08/04/2026 05 PM PDT           31.86            832         0              Normal
  08/04/2026 06 PM PDT           31.85            828         -              Normal
  08/04/2026 07 PM PDT           31.85            828         0              Normal
  08/04/2026 08 PM PDT           31.84            825         -              Normal
  08/04/2026 09 PM PDT           31.83            821         -              Normal
  08/04/2026 10 PM PDT           31.83            821         0              Normal
  08/04/2026 11 PM PDT           31.82            818         -              Normal
  08/05/2026 12 AM PDT           31.82            818         0              Normal
  08/05/2026 01 AM PDT           31.81            814         -              Normal
  08/05/2026 02 AM PDT           31.80            811         -              Normal
  08/05/2026 03 AM PDT           31.80            811         0              Normal
  08/05/2026 04 AM PDT           31.79            807         -              Normal
  08/05/2026 05 AM PDT           31.79            807         0              Normal
  08/05/2026 06 AM PDT           31.78            804         -              Normal
  08/05/2026 07 AM PDT           31.78            804         0              Normal
  08/05/2026 08 AM PDT           31.77            800         -              Normal
  08/05/2026 09 AM PDT           31.77            800         0              Normal
  08/05/2026 10 AM PDT           31.76            797         -              Normal
  08/05/2026 11 AM PDT           31.76            797         0              Normal
  08/05/2026 12 PM PDT           31.75            793         -              Normal
  08/05/2026 01 PM PDT           31.75            793         0              Normal
  08/05/2026 02 PM PDT           31.75            793         0              Normal
  08/05/2026 03 PM PDT           31.74            790         -              Normal
  08/05/2026 04 PM PDT           31.74            790         0              Normal
  08/05/2026 05 PM PDT           31.73            786         -              Normal
  08/05/2026 06 PM PDT           31.73            786         0              Normal
  08/05/2026 07 PM PDT           31.73            786         0              Normal
  08/05/2026 08 PM PDT           31.73            786         0              Normal
  08/05/2026 09 PM PDT           31.72            783         -              Normal
  08/05/2026 10 PM PDT           31.72            783         0              Normal
  08/05/2026 11 PM PDT           31.72            783         0              Normal
  08/06/2026 12 AM PDT           31.72            783         0              Normal
  08/06/2026 01 AM PDT           31.71            779         -              Normal
  08/06/2026 02 AM PDT           31.71            779         0              Normal
  08/06/2026 03 AM PDT           31.71            779         0              Normal
  08/06/2026 04 AM PDT           31.71            779         0              Normal
  08/06/2026 05 AM PDT           31.71            779         0              Normal
  08/06/2026 06 AM PDT           31.70            776         -              Normal
  08/06/2026 07 AM PDT           31.70            776         0              Normal
  08/06/2026 08 AM PDT           31.70            776         0              Normal
  08/06/2026 09 AM PDT           31.70            776         0              Normal
  08/06/2026 10 AM PDT           31.70            776         0              Normal
  08/06/2026 11 AM PDT           31.70            776         0              Normal
  08/06/2026 12 PM PDT           31.70            776         0              Normal
  08/06/2026 01 PM PDT           31.70            776         0              Normal
  08/06/2026 02 PM PDT           31.70            776         0              Normal
  08/06/2026 03 PM PDT           31.70            776         0              Normal
  08/06/2026 04 PM PDT           31.69            772         -              Normal
  08/06/2026 05 PM PDT           31.69            772         0              Normal
  08/06/2026 06 PM PDT           31.69            772         0              Normal
  08/06/2026 07 PM PDT           31.69            772         0              Normal
  08/06/2026 08 PM PDT           31.69            772         0              Normal
  08/06/2026 09 PM PDT           31.69            772         0              Normal
  08/06/2026 10 PM PDT           31.69            772         0              Normal
  08/06/2026 11 PM PDT           31.69            772         0              Normal
  08/07/2026 12 AM PDT           31.69            772         0              Normal
  08/07/2026 01 AM PDT           31.69            772         0              Normal
  08/07/2026 02 AM PDT           31.69            772         0              Normal
  08/07/2026 03 AM PDT           31.69            772         0              Normal
  08/07/2026 04 AM PDT           31.69            772         0              Normal
  08/07/2026 05 AM PDT           31.69            772         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.