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: Sep 09 2026 at 7:38 AM PDTNext Issuance: Sep 10 2026 at 9:00 AM PDT
Action: 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:  09/09/2026 at 07:38 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  09/07/2026 at 12:00 PM PDT
# Maximum Observed Stage:                       30.74 Feet
# Maximum Observed Flow:                        487 cfs
#
# Earliest Date & Time of Maximum Forecast:     09/11/2026 at 06:00 PM PDT
# Maximum Forecast Stage:                       30.19 Feet
# Maximum Forecast Flow:                        349 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  09/04/2026 07 AM PDT           30.60            451                        Normal
  09/04/2026 08 AM PDT           30.60            451         0              Normal
  09/04/2026 09 AM PDT           30.60            451         0              Normal
  09/04/2026 10 AM PDT           30.63            458         +              Normal
  09/04/2026 11 AM PDT           30.63            458         0              Normal
  09/04/2026 12 PM PDT           30.62            456         -              Normal
  09/04/2026 01 PM PDT           30.63            458         +              Normal
  09/04/2026 02 PM PDT           30.63            458         0              Normal
  09/04/2026 03 PM PDT           30.62            456         -              Normal
  09/04/2026 04 PM PDT           30.62            456         0              Normal
  09/04/2026 05 PM PDT           30.62            456         0              Normal
  09/04/2026 06 PM PDT           30.62            456         0              Normal
  09/04/2026 07 PM PDT           30.63            458         +              Normal
  09/04/2026 08 PM PDT           30.62            456         -              Normal
  09/04/2026 09 PM PDT           30.62            456         0              Normal
  09/04/2026 10 PM PDT           30.62            456         0              Normal
  09/04/2026 11 PM PDT           30.62            456         0              Normal
  09/05/2026 12 AM PDT           30.62            456         0              Normal
  09/05/2026 01 AM PDT           30.61            453         -              Normal
  09/05/2026 02 AM PDT           30.61            453         0              Normal
  09/05/2026 03 AM PDT           30.60            451         -              Normal
  09/05/2026 04 AM PDT           30.60            451         0              Normal
  09/05/2026 05 AM PDT           30.58            445         -              Normal
  09/05/2026 06 AM PDT           30.58            445         0              Normal
  09/05/2026 07 AM PDT           30.58            445         0              Normal
  09/05/2026 08 AM PDT           30.58            445         0              Normal
  09/05/2026 09 AM PDT           30.58            445         0              Normal
  09/05/2026 10 AM PDT           30.58            445         0              Normal
  09/05/2026 11 AM PDT           30.59            448         +              Normal
  09/05/2026 12 PM PDT           30.59            448         0              Normal
  09/05/2026 01 PM PDT           30.59            448         0              Normal
  09/05/2026 02 PM PDT           30.59            448         0              Normal
  09/05/2026 03 PM PDT           30.59            448         0              Normal
  09/05/2026 04 PM PDT           30.59            448         0              Normal
  09/05/2026 05 PM PDT           30.59            448         0              Normal
  09/05/2026 06 PM PDT           30.59            448         0              Normal
  09/05/2026 07 PM PDT           30.59            448         0              Normal
  09/05/2026 08 PM PDT           30.59            448         0              Normal
  09/05/2026 09 PM PDT           30.59            448         0              Normal
  09/05/2026 10 PM PDT           30.58            445         -              Normal
  09/05/2026 11 PM PDT           30.58            445         0              Normal
  09/06/2026 12 AM PDT           30.58            445         0              Normal
  09/06/2026 01 AM PDT           30.58            445         0              Normal
  09/06/2026 02 AM PDT           30.59            448         +              Normal
  09/06/2026 03 AM PDT           30.59            448         0              Normal
  09/06/2026 04 AM PDT           30.60            451         +              Normal
  09/06/2026 05 AM PDT           30.60            451         0              Normal
  09/06/2026 06 AM PDT           30.60            451         0              Normal
  09/06/2026 07 AM PDT           30.60            451         0              Normal
  09/06/2026 08 AM PDT           30.61            453         +              Normal
  09/06/2026 09 AM PDT           30.61            453         0              Normal
  09/06/2026 10 AM PDT           30.67            469         +              Normal
  09/06/2026 11 AM PDT           30.65            464         -              Normal
  09/06/2026 12 PM PDT           30.65            464         0              Normal
  09/06/2026 01 PM PDT           30.64            461         -              Normal
  09/06/2026 02 PM PDT           30.64            461         0              Normal
  09/06/2026 03 PM PDT           30.64            461         0              Normal
  09/06/2026 04 PM PDT           30.64            461         0              Normal
  09/06/2026 05 PM PDT           30.63            458         -              Normal
  09/06/2026 06 PM PDT           30.64            461         +              Normal
  09/06/2026 07 PM PDT           30.68            472         +              Normal
  09/06/2026 08 PM PDT           30.68            472         0              Normal
  09/06/2026 09 PM PDT           30.67            469         -              Normal
  09/06/2026 10 PM PDT           30.69            474         +              Normal
  09/06/2026 11 PM PDT           30.69            474         0              Normal
  09/07/2026 12 AM PDT           30.69            474         0              Normal
  09/07/2026 01 AM PDT           30.70            477         +              Normal
  09/07/2026 02 AM PDT           30.70            477         0              Normal
  09/07/2026 03 AM PDT           30.69            474         -              Normal
  09/07/2026 04 AM PDT           30.69            474         0              Normal
  09/07/2026 05 AM PDT           30.69            474         0              Normal
  09/07/2026 06 AM PDT           30.70            477         +              Normal
  09/07/2026 07 AM PDT           30.71            479         +              Normal
  09/07/2026 08 AM PDT           30.72            482         +              Normal
  09/07/2026 09 AM PDT           30.73            485         +              Normal
  09/07/2026 10 AM PDT           30.74            487         +              Normal
  09/07/2026 11 AM PDT           30.74            487         0              Normal
  09/07/2026 12 PM PDT           30.74            487         0              Normal
  09/07/2026 01 PM PDT           30.73            485         -              Normal
  09/07/2026 02 PM PDT           30.71            479         -              Normal
  09/07/2026 03 PM PDT           30.67            469         -              Normal
  09/07/2026 04 PM PDT           30.66            466         -              Normal
  09/07/2026 05 PM PDT           30.65            464         -              Normal
  09/07/2026 06 PM PDT           30.61            453         -              Normal
  09/07/2026 07 PM PDT           30.60            451         -              Normal
  09/07/2026 08 PM PDT           30.58            445         -              Normal
  09/07/2026 09 PM PDT           30.57            443         -              Normal
  09/07/2026 10 PM PDT           30.56            440         -              Normal
  09/07/2026 11 PM PDT           30.55            438         -              Normal
  09/08/2026 12 AM PDT           30.53            433         -              Normal
  09/08/2026 01 AM PDT           30.52            430         -              Normal
  09/08/2026 02 AM PDT           30.51            428         -              Normal
  09/08/2026 03 AM PDT           30.50            425         -              Normal
  09/08/2026 04 AM PDT           30.49            423         -              Normal
  09/08/2026 05 AM PDT           30.48            420         -              Normal
  09/08/2026 06 AM PDT           30.44            410         -              Normal
  09/08/2026 07 AM PDT           30.40            400         -              Normal
  09/08/2026 08 AM PDT           30.39            398         -              Normal
  09/08/2026 09 AM PDT           30.38            395         -              Normal
  09/08/2026 10 AM PDT           30.36            390         -              Normal
  09/08/2026 11 AM PDT           30.34            385         -              Normal
  09/08/2026 12 PM PDT           30.35            388         +              Normal
  09/08/2026 01 PM PDT           30.32            380         -              Normal
  09/08/2026 02 PM PDT           30.28            371         -              Normal
  09/08/2026 03 PM PDT           30.27            368         -              Normal
  09/08/2026 04 PM PDT           30.26            366         -              Normal
  09/08/2026 05 PM PDT           30.21            354         -              Normal
  09/08/2026 06 PM PDT           30.22            356         +              Normal
  09/08/2026 07 PM PDT           30.21            354         -              Normal
  09/08/2026 08 PM PDT           30.19            349         -              Normal
  09/08/2026 09 PM PDT           30.20            352         +              Normal
  09/08/2026 10 PM PDT           30.19            349         -              Normal
  09/08/2026 11 PM PDT           30.19            349         0              Normal
  09/09/2026 12 AM PDT           30.19            349         0              Normal
  09/09/2026 01 AM PDT           30.19            349         0              Normal
  09/09/2026 02 AM PDT           30.18            347         -              Normal
  09/09/2026 03 AM PDT           30.18            347         0              Normal
  09/09/2026 04 AM PDT           30.18            347         0              Normal
  09/09/2026 05 AM PDT           30.17            345         -              Normal
  09/09/2026 06 AM PDT           30.17            345         0              Normal
  09/09/2026 07 AM PDT           30.17            345         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  09/09/2026 08 AM PDT           30.17            345                        Normal
  09/09/2026 09 AM PDT           30.17            345         0              Normal
  09/09/2026 10 AM PDT           30.17            345         0              Normal
  09/09/2026 11 AM PDT           30.16            342         -              Normal
  09/09/2026 12 PM PDT           30.16            342         0              Normal
  09/09/2026 01 PM PDT           30.16            342         0              Normal
  09/09/2026 02 PM PDT           30.16            342         0              Normal
  09/09/2026 03 PM PDT           30.15            340         -              Normal
  09/09/2026 04 PM PDT           30.15            340         0              Normal
  09/09/2026 05 PM PDT           30.14            338         -              Normal
  09/09/2026 06 PM PDT           30.14            338         0              Normal
  09/09/2026 07 PM PDT           30.13            337         -              Normal
  09/09/2026 08 PM PDT           30.13            337         0              Normal
  09/09/2026 09 PM PDT           30.12            335         -              Normal
  09/09/2026 10 PM PDT           30.12            335         0              Normal
  09/09/2026 11 PM PDT           30.12            335         0              Normal
  09/10/2026 12 AM PDT           30.11            333         -              Normal
  09/10/2026 01 AM PDT           30.11            333         0              Normal
  09/10/2026 02 AM PDT           30.11            333         0              Normal
  09/10/2026 03 AM PDT           30.10            332         -              Normal
  09/10/2026 04 AM PDT           30.10            332         0              Normal
  09/10/2026 05 AM PDT           30.10            332         0              Normal
  09/10/2026 06 AM PDT           30.10            332         0              Normal
  09/10/2026 07 AM PDT           30.10            332         0              Normal
  09/10/2026 08 AM PDT           30.10            332         0              Normal
  09/10/2026 09 AM PDT           30.10            332         0              Normal
  09/10/2026 10 AM PDT           30.10            332         0              Normal
  09/10/2026 11 AM PDT           30.10            332         0              Normal
  09/10/2026 12 PM PDT           30.10            332         0              Normal
  09/10/2026 01 PM PDT           30.11            333         +              Normal
  09/10/2026 02 PM PDT           30.11            333         0              Normal
  09/10/2026 03 PM PDT           30.11            333         0              Normal
  09/10/2026 04 PM PDT           30.11            333         0              Normal
  09/10/2026 05 PM PDT           30.12            335         +              Normal
  09/10/2026 06 PM PDT           30.12            335         0              Normal
  09/10/2026 07 PM PDT           30.12            335         0              Normal
  09/10/2026 08 PM PDT           30.12            335         0              Normal
  09/10/2026 09 PM PDT           30.13            337         +              Normal
  09/10/2026 10 PM PDT           30.13            337         0              Normal
  09/10/2026 11 PM PDT           30.14            338         +              Normal
  09/11/2026 12 AM PDT           30.14            338         0              Normal
  09/11/2026 01 AM PDT           30.15            340         +              Normal
  09/11/2026 02 AM PDT           30.15            340         0              Normal
  09/11/2026 03 AM PDT           30.15            340         0              Normal
  09/11/2026 04 AM PDT           30.16            342         +              Normal
  09/11/2026 05 AM PDT           30.16            342         0              Normal
  09/11/2026 06 AM PDT           30.16            342         0              Normal
  09/11/2026 07 AM PDT           30.16            342         0              Normal
  09/11/2026 08 AM PDT           30.17            345         +              Normal
  09/11/2026 09 AM PDT           30.17            345         0              Normal
  09/11/2026 10 AM PDT           30.17            345         0              Normal
  09/11/2026 11 AM PDT           30.17            345         0              Normal
  09/11/2026 12 PM PDT           30.18            347         +              Normal
  09/11/2026 01 PM PDT           30.18            347         0              Normal
  09/11/2026 02 PM PDT           30.18            347         0              Normal
  09/11/2026 03 PM PDT           30.18            347         0              Normal
  09/11/2026 04 PM PDT           30.18            347         0              Normal
  09/11/2026 05 PM PDT           30.18            347         0              Normal
  09/11/2026 06 PM PDT           30.19            349         +              Normal
  09/11/2026 07 PM PDT           30.19            349         0              Normal
  09/11/2026 08 PM PDT           30.19            349         0              Normal
  09/11/2026 09 PM PDT           30.19            349         0              Normal
  09/11/2026 10 PM PDT           30.19            349         0              Normal
  09/11/2026 11 PM PDT           30.19            349         0              Normal
  09/12/2026 12 AM PDT           30.19            349         0              Normal
  09/12/2026 01 AM PDT           30.19            349         0              Normal
  09/12/2026 02 AM PDT           30.19            349         0              Normal
  09/12/2026 03 AM PDT           30.19            349         0              Normal
  09/12/2026 04 AM PDT           30.19            349         0              Normal
  09/12/2026 05 AM PDT           30.19            349         0              Normal
  09/12/2026 06 AM PDT           30.19            349         0              Normal
  09/12/2026 07 AM PDT           30.19            349         0              Normal
  09/12/2026 08 AM PDT           30.19            349         0              Normal
  09/12/2026 09 AM PDT           30.19            349         0              Normal
  09/12/2026 10 AM PDT           30.19            349         0              Normal
  09/12/2026 11 AM PDT           30.19            349         0              Normal
  09/12/2026 12 PM PDT           30.19            349         0              Normal
  09/12/2026 01 PM PDT           30.19            349         0              Normal
  09/12/2026 02 PM PDT           30.19            349         0              Normal
  09/12/2026 03 PM PDT           30.18            347         -              Normal
  09/12/2026 04 PM PDT           30.18            347         0              Normal
  09/12/2026 05 PM PDT           30.18            347         0              Normal
  09/12/2026 06 PM PDT           30.18            347         0              Normal
  09/12/2026 07 PM PDT           30.18            347         0              Normal
  09/12/2026 08 PM PDT           30.18            347         0              Normal
  09/12/2026 09 PM PDT           30.18            347         0              Normal
  09/12/2026 10 PM PDT           30.18            347         0              Normal
  09/12/2026 11 PM PDT           30.18            347         0              Normal
  09/13/2026 12 AM PDT           30.18            347         0              Normal
  09/13/2026 01 AM PDT           30.18            347         0              Normal
  09/13/2026 02 AM PDT           30.18            347         0              Normal
  09/13/2026 03 AM PDT           30.18            347         0              Normal
  09/13/2026 04 AM PDT           30.18            347         0              Normal
  09/13/2026 05 AM PDT           30.17            345         -              Normal
  09/13/2026 06 AM PDT           30.17            345         0              Normal
  09/13/2026 07 AM PDT           30.17            345         0              Normal
  09/13/2026 08 AM PDT           30.17            345         0              Normal
  09/13/2026 09 AM PDT           30.17            345         0              Normal
  09/13/2026 10 AM PDT           30.17            345         0              Normal
  09/13/2026 11 AM PDT           30.17            345         0              Normal
  09/13/2026 12 PM PDT           30.17            345         0              Normal
  09/13/2026 01 PM PDT           30.17            345         0              Normal
  09/13/2026 02 PM PDT           30.17            345         0              Normal
  09/13/2026 03 PM PDT           30.17            345         0              Normal
  09/13/2026 04 PM PDT           30.17            345         0              Normal
  09/13/2026 05 PM PDT           30.17            345         0              Normal
  09/13/2026 06 PM PDT           30.17            345         0              Normal
  09/13/2026 07 PM PDT           30.17            345         0              Normal
  09/13/2026 08 PM PDT           30.17            345         0              Normal
  09/13/2026 09 PM PDT           30.17            345         0              Normal
  09/13/2026 10 PM PDT           30.17            345         0              Normal
  09/13/2026 11 PM PDT           30.17            345         0              Normal
  09/14/2026 12 AM PDT           30.16            342         -              Normal
  09/14/2026 01 AM PDT           30.16            342         0              Normal
  09/14/2026 02 AM PDT           30.16            342         0              Normal
  09/14/2026 03 AM PDT           30.16            342         0              Normal
  09/14/2026 04 AM PDT           30.16            342         0              Normal
  09/14/2026 05 AM PDT           30.16            342         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.