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: Jul 26 2026 at 7:10 AM PDTNext Issuance: Jul 27 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:  07/26/2026 at 07:10 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  07/26/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       31.35 Feet
# Maximum Observed Flow:                        660 cfs
#
# Earliest Date & Time of Maximum Forecast:     07/29/2026 at 11:00 PM PDT
# Maximum Forecast Stage:                       31.86 Feet
# Maximum Forecast Flow:                        832 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/21/2026 07 AM PDT           30.45            412                        Normal
  07/21/2026 08 AM PDT           30.45            412         0              Normal
  07/21/2026 09 AM PDT           30.44            410         -              Normal
  07/21/2026 10 AM PDT           30.47            417         +              Normal
  07/21/2026 11 AM PDT           30.51            428         +              Normal
  07/21/2026 12 PM PDT           30.49            423         -              Normal
  07/21/2026 01 PM PDT           30.53            433         +              Normal
  07/21/2026 02 PM PDT           30.52            430         -              Normal
  07/21/2026 03 PM PDT           30.50            425         -              Normal
  07/21/2026 04 PM PDT           30.49            423         -              Normal
  07/21/2026 05 PM PDT           30.47            417         -              Normal
  07/21/2026 06 PM PDT           30.44            410         -              Normal
  07/21/2026 07 PM PDT           30.44            410         0              Normal
  07/21/2026 08 PM PDT           30.44            410         0              Normal
  07/21/2026 09 PM PDT           30.44            410         0              Normal
  07/21/2026 10 PM PDT           30.46            415         +              Normal
  07/21/2026 11 PM PDT           30.43            407         -              Normal
  07/22/2026 12 AM PDT           30.40            400         -              Normal
  07/22/2026 01 AM PDT           30.41            402         +              Normal
  07/22/2026 02 AM PDT           30.40            400         -              Normal
  07/22/2026 03 AM PDT           30.38            395         -              Normal
  07/22/2026 04 AM PDT           30.38            395         0              Normal
  07/22/2026 05 AM PDT           30.37            393         -              Normal
  07/22/2026 06 AM PDT           30.37            393         0              Normal
  07/22/2026 07 AM PDT           30.36            390         -              Normal
  07/22/2026 08 AM PDT           30.35            388         -              Normal
  07/22/2026 09 AM PDT           30.34            385         -              Normal
  07/22/2026 10 AM PDT           30.32            380         -              Normal
  07/22/2026 11 AM PDT           30.32            380         0              Normal
  07/22/2026 12 PM PDT           30.32            380         0              Normal
  07/22/2026 01 PM PDT           30.29            373         -              Normal
  07/22/2026 02 PM PDT           30.27            368         -              Normal
  07/22/2026 03 PM PDT           30.29            373         +              Normal
  07/22/2026 04 PM PDT           30.28            371         -              Normal
  07/22/2026 05 PM PDT           30.22            356         -              Normal
  07/22/2026 06 PM PDT           30.22            356         0              Normal
  07/22/2026 07 PM PDT           30.20            352         -              Normal
  07/22/2026 08 PM PDT           30.17            345         -              Normal
  07/22/2026 09 PM PDT           30.15            340         -              Normal
  07/22/2026 10 PM PDT           30.15            340         0              Normal
  07/22/2026 11 PM PDT           30.14            338         -              Normal
  07/23/2026 12 AM PDT           30.15            340         +              Normal
  07/23/2026 01 AM PDT           30.17            345         +              Normal
  07/23/2026 02 AM PDT           30.18            347         +              Normal
  07/23/2026 03 AM PDT           30.20            352         +              Normal
  07/23/2026 04 AM PDT           30.21            354         +              Normal
  07/23/2026 05 AM PDT           30.22            356         +              Normal
  07/23/2026 06 AM PDT           30.22            356         0              Normal
  07/23/2026 07 AM PDT           30.19            349         -              Normal
  07/23/2026 08 AM PDT           30.20            352         +              Normal
  07/23/2026 09 AM PDT           30.20            352         0              Normal
  07/23/2026 10 AM PDT           30.18            347         -              Normal
  07/23/2026 11 AM PDT           30.15            340         -              Normal
  07/23/2026 12 PM PDT           30.13            337         -              Normal
  07/23/2026 01 PM PDT           30.10            332         -              Normal
  07/23/2026 02 PM PDT           30.09            330         -              Normal
  07/23/2026 03 PM PDT           30.12            335         +              Normal
  07/23/2026 04 PM PDT           30.12            335         0              Normal
  07/23/2026 05 PM PDT           30.14            338         +              Normal
  07/23/2026 06 PM PDT           30.18            347         +              Normal
  07/23/2026 07 PM PDT           30.20            352         +              Normal
  07/23/2026 08 PM PDT           30.25            364         +              Normal
  07/23/2026 09 PM PDT           30.30            376         +              Normal
  07/23/2026 10 PM PDT           30.35            388         +              Normal
  07/23/2026 11 PM PDT           30.39            398         +              Normal
  07/24/2026 12 AM PDT           30.42            405         +              Normal
  07/24/2026 01 AM PDT           30.46            415         +              Normal
  07/24/2026 02 AM PDT           30.49            423         +              Normal
  07/24/2026 03 AM PDT           30.52            430         +              Normal
  07/24/2026 04 AM PDT           30.55            438         +              Normal
  07/24/2026 05 AM PDT           30.59            448         +              Normal
  07/24/2026 06 AM PDT           30.60            451         +              Normal
  07/24/2026 07 AM PDT           30.62            456         +              Normal
  07/24/2026 08 AM PDT           30.65            464         +              Normal
  07/24/2026 09 AM PDT           30.67            469         +              Normal
  07/24/2026 10 AM PDT           30.70            477         +              Normal
  07/24/2026 11 AM PDT           30.74            487         +              Normal
  07/24/2026 12 PM PDT           30.78            498         +              Normal
  07/24/2026 01 PM PDT           30.81            506         +              Normal
  07/24/2026 02 PM PDT           30.83            512         +              Normal
  07/24/2026 03 PM PDT           30.87            523         +              Normal
  07/24/2026 04 PM PDT           30.89            528         +              Normal
  07/24/2026 05 PM PDT           30.89            528         0              Normal
  07/24/2026 06 PM PDT           30.92            536         +              Normal
  07/24/2026 07 PM PDT           30.92            536         0              Normal
  07/24/2026 08 PM PDT           30.91            534         -              Normal
  07/24/2026 09 PM PDT           30.92            536         +              Normal
  07/24/2026 10 PM PDT           30.93            539         +              Normal
  07/24/2026 11 PM PDT           30.93            539         0              Normal
  07/25/2026 12 AM PDT           30.94            542         +              Normal
  07/25/2026 01 AM PDT           30.95            545         +              Normal
  07/25/2026 02 AM PDT           30.96            547         +              Normal
  07/25/2026 03 AM PDT           30.96            547         0              Normal
  07/25/2026 04 AM PDT           30.97            550         +              Normal
  07/25/2026 05 AM PDT           30.97            550         0              Normal
  07/25/2026 06 AM PDT           30.98            553         +              Normal
  07/25/2026 07 AM PDT           30.99            556         +              Normal
  07/25/2026 08 AM PDT           31.02            564         +              Normal
  07/25/2026 09 AM PDT           31.04            570         +              Normal
  07/25/2026 10 AM PDT           31.05            573         +              Normal
  07/25/2026 11 AM PDT           31.05            573         0              Normal
  07/25/2026 12 PM PDT           31.08            581         +              Normal
  07/25/2026 01 PM PDT           31.10            587         +              Normal
  07/25/2026 02 PM PDT           31.14            598         +              Normal
  07/25/2026 03 PM PDT           31.14            598         0              Normal
  07/25/2026 04 PM PDT           31.17            607         +              Normal
  07/25/2026 05 PM PDT           31.19            613         +              Normal
  07/25/2026 06 PM PDT           31.19            613         0              Normal
  07/25/2026 07 PM PDT           31.20            616         +              Normal
  07/25/2026 08 PM PDT           31.21            619         +              Normal
  07/25/2026 09 PM PDT           31.22            622         +              Normal
  07/25/2026 10 PM PDT           31.24            627         +              Normal
  07/25/2026 11 PM PDT           31.25            630         +              Normal
  07/26/2026 12 AM PDT           31.26            633         +              Normal
  07/26/2026 01 AM PDT           31.28            639         +              Normal
  07/26/2026 02 AM PDT           31.29            642         +              Normal
  07/26/2026 03 AM PDT           31.30            645         +              Normal
  07/26/2026 04 AM PDT           31.32            651         +              Normal
  07/26/2026 05 AM PDT           31.34            657         +              Normal
  07/26/2026 06 AM PDT           31.35            660         +              Normal
  07/26/2026 07 AM PDT           31.35            660         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  07/26/2026 08 AM PDT           31.36            663                        Normal
  07/26/2026 09 AM PDT           31.37            666         +              Normal
  07/26/2026 10 AM PDT           31.39            672         +              Normal
  07/26/2026 11 AM PDT           31.40            675         +              Normal
  07/26/2026 12 PM PDT           31.41            678         +              Normal
  07/26/2026 01 PM PDT           31.43            685         +              Normal
  07/26/2026 02 PM PDT           31.44            688         +              Normal
  07/26/2026 03 PM PDT           31.45            691         +              Normal
  07/26/2026 04 PM PDT           31.47            698         +              Normal
  07/26/2026 05 PM PDT           31.48            701         +              Normal
  07/26/2026 06 PM PDT           31.49            705         +              Normal
  07/26/2026 07 PM PDT           31.51            711         +              Normal
  07/26/2026 08 PM PDT           31.52            715         +              Normal
  07/26/2026 09 PM PDT           31.53            718         +              Normal
  07/26/2026 10 PM PDT           31.55            725         +              Normal
  07/26/2026 11 PM PDT           31.56            728         +              Normal
  07/27/2026 12 AM PDT           31.57            731         +              Normal
  07/27/2026 01 AM PDT           31.58            735         +              Normal
  07/27/2026 02 AM PDT           31.59            738         +              Normal
  07/27/2026 03 AM PDT           31.60            742         +              Normal
  07/27/2026 04 AM PDT           31.61            745         +              Normal
  07/27/2026 05 AM PDT           31.62            748         +              Normal
  07/27/2026 06 AM PDT           31.63            752         +              Normal
  07/27/2026 07 AM PDT           31.64            755         +              Normal
  07/27/2026 08 AM PDT           31.65            759         +              Normal
  07/27/2026 09 AM PDT           31.66            762         +              Normal
  07/27/2026 10 AM PDT           31.67            765         +              Normal
  07/27/2026 11 AM PDT           31.68            769         +              Normal
  07/27/2026 12 PM PDT           31.69            772         +              Normal
  07/27/2026 01 PM PDT           31.70            776         +              Normal
  07/27/2026 02 PM PDT           31.70            776         0              Normal
  07/27/2026 03 PM PDT           31.71            779         +              Normal
  07/27/2026 04 PM PDT           31.72            783         +              Normal
  07/27/2026 05 PM PDT           31.73            786         +              Normal
  07/27/2026 06 PM PDT           31.73            786         0              Normal
  07/27/2026 07 PM PDT           31.74            790         +              Normal
  07/27/2026 08 PM PDT           31.74            790         0              Normal
  07/27/2026 09 PM PDT           31.75            793         +              Normal
  07/27/2026 10 PM PDT           31.75            793         0              Normal
  07/27/2026 11 PM PDT           31.76            797         +              Normal
  07/28/2026 12 AM PDT           31.77            800         +              Normal
  07/28/2026 01 AM PDT           31.77            800         0              Normal
  07/28/2026 02 AM PDT           31.78            804         +              Normal
  07/28/2026 03 AM PDT           31.78            804         0              Normal
  07/28/2026 04 AM PDT           31.79            807         +              Normal
  07/28/2026 05 AM PDT           31.79            807         0              Normal
  07/28/2026 06 AM PDT           31.79            807         0              Normal
  07/28/2026 07 AM PDT           31.80            811         +              Normal
  07/28/2026 08 AM PDT           31.80            811         0              Normal
  07/28/2026 09 AM PDT           31.80            811         0              Normal
  07/28/2026 10 AM PDT           31.81            814         +              Normal
  07/28/2026 11 AM PDT           31.81            814         0              Normal
  07/28/2026 12 PM PDT           31.81            814         0              Normal
  07/28/2026 01 PM PDT           31.82            818         +              Normal
  07/28/2026 02 PM PDT           31.82            818         0              Normal
  07/28/2026 03 PM PDT           31.82            818         0              Normal
  07/28/2026 04 PM PDT           31.82            818         0              Normal
  07/28/2026 05 PM PDT           31.82            818         0              Normal
  07/28/2026 06 PM PDT           31.83            821         +              Normal
  07/28/2026 07 PM PDT           31.83            821         0              Normal
  07/28/2026 08 PM PDT           31.83            821         0              Normal
  07/28/2026 09 PM PDT           31.83            821         0              Normal
  07/28/2026 10 PM PDT           31.84            825         +              Normal
  07/28/2026 11 PM PDT           31.84            825         0              Normal
  07/29/2026 12 AM PDT           31.84            825         0              Normal
  07/29/2026 01 AM PDT           31.84            825         0              Normal
  07/29/2026 02 AM PDT           31.84            825         0              Normal
  07/29/2026 03 AM PDT           31.84            825         0              Normal
  07/29/2026 04 AM PDT           31.84            825         0              Normal
  07/29/2026 05 AM PDT           31.84            825         0              Normal
  07/29/2026 06 AM PDT           31.84            825         0              Normal
  07/29/2026 07 AM PDT           31.85            828         +              Normal
  07/29/2026 08 AM PDT           31.85            828         0              Normal
  07/29/2026 09 AM PDT           31.85            828         0              Normal
  07/29/2026 10 AM PDT           31.85            828         0              Normal
  07/29/2026 11 AM PDT           31.85            828         0              Normal
  07/29/2026 12 PM PDT           31.85            828         0              Normal
  07/29/2026 01 PM PDT           31.85            828         0              Normal
  07/29/2026 02 PM PDT           31.85            828         0              Normal
  07/29/2026 03 PM PDT           31.85            828         0              Normal
  07/29/2026 04 PM PDT           31.85            828         0              Normal
  07/29/2026 05 PM PDT           31.85            828         0              Normal
  07/29/2026 06 PM PDT           31.85            828         0              Normal
  07/29/2026 07 PM PDT           31.85            828         0              Normal
  07/29/2026 08 PM PDT           31.85            828         0              Normal
  07/29/2026 09 PM PDT           31.85            828         0              Normal
  07/29/2026 10 PM PDT           31.85            828         0              Normal
  07/29/2026 11 PM PDT           31.86            832         +              Normal
  07/30/2026 12 AM PDT           31.86            832         0              Normal
  07/30/2026 01 AM PDT           31.86            832         0              Normal
  07/30/2026 02 AM PDT           31.86            832         0              Normal
  07/30/2026 03 AM PDT           31.86            832         0              Normal
  07/30/2026 04 AM PDT           31.86            832         0              Normal
  07/30/2026 05 AM PDT           31.86            832         0              Normal
  07/30/2026 06 AM PDT           31.86            832         0              Normal
  07/30/2026 07 AM PDT           31.86            832         0              Normal
  07/30/2026 08 AM PDT           31.86            832         0              Normal
  07/30/2026 09 AM PDT           31.86            832         0              Normal
  07/30/2026 10 AM PDT           31.86            832         0              Normal
  07/30/2026 11 AM PDT           31.86            832         0              Normal
  07/30/2026 12 PM PDT           31.86            832         0              Normal
  07/30/2026 01 PM PDT           31.86            832         0              Normal
  07/30/2026 02 PM PDT           31.86            832         0              Normal
  07/30/2026 03 PM PDT           31.86            832         0              Normal
  07/30/2026 04 PM PDT           31.86            832         0              Normal
  07/30/2026 05 PM PDT           31.86            832         0              Normal
  07/30/2026 06 PM PDT           31.86            832         0              Normal
  07/30/2026 07 PM PDT           31.86            832         0              Normal
  07/30/2026 08 PM PDT           31.86            832         0              Normal
  07/30/2026 09 PM PDT           31.86            832         0              Normal
  07/30/2026 10 PM PDT           31.86            832         0              Normal
  07/30/2026 11 PM PDT           31.86            832         0              Normal
  07/31/2026 12 AM PDT           31.86            832         0              Normal
  07/31/2026 01 AM PDT           31.86            832         0              Normal
  07/31/2026 02 AM PDT           31.86            832         0              Normal
  07/31/2026 03 AM PDT           31.86            832         0              Normal
  07/31/2026 04 AM PDT           31.86            832         0              Normal
  07/31/2026 05 AM PDT           31.86            832         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.