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: Nov 15 2026 at 8:32 AM PSTNext Issuance: Nov 16 2026 at 9:00 AM PST
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:  11/15/2026 at 08:32 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  11/15/2026 at 08:00 AM PST
# Maximum Observed Stage:                       31.73 Feet
# Maximum Observed Flow:                        786 cfs
#
# Earliest Date & Time of Maximum Forecast:     11/18/2026 at 12:00 AM PST
# Maximum Forecast Stage:                       31.87 Feet
# Maximum Forecast Flow:                        836 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  11/10/2026 08 AM PST           31.46            695                        Normal
  11/10/2026 09 AM PST           31.45            691         -              Normal
  11/10/2026 10 AM PST           31.47            698         +              Normal
  11/10/2026 11 AM PST           31.46            695         -              Normal
  11/10/2026 12 PM PST           31.46            695         0              Normal
  11/10/2026 01 PM PST           31.46            695         0              Normal
  11/10/2026 02 PM PST           31.45            691         -              Normal
  11/10/2026 03 PM PST           31.44            688         -              Normal
  11/10/2026 04 PM PST           31.45            691         +              Normal
  11/10/2026 05 PM PST           31.43            685         -              Normal
  11/10/2026 06 PM PST           31.42            682         -              Normal
  11/10/2026 07 PM PST           31.42            682         0              Normal
  11/10/2026 08 PM PST           31.41            678         -              Normal
  11/10/2026 09 PM PST           31.40            675         -              Normal
  11/10/2026 10 PM PST           31.41            678         +              Normal
  11/10/2026 11 PM PST           31.40            675         -              Normal
  11/11/2026 12 AM PST           31.40            675         0              Normal
  11/11/2026 01 AM PST           31.40            675         0              Normal
  11/11/2026 02 AM PST           31.40            675         0              Normal
  11/11/2026 03 AM PST           31.40            675         0              Normal
  11/11/2026 04 AM PST           31.40            675         0              Normal
  11/11/2026 05 AM PST           31.40            675         0              Normal
  11/11/2026 06 AM PST           31.40            675         0              Normal
  11/11/2026 07 AM PST           31.40            675         0              Normal
  11/11/2026 08 AM PST           31.40            675         0              Normal
  11/11/2026 09 AM PST           31.41            678         +              Normal
  11/11/2026 10 AM PST           31.40            675         -              Normal
  11/11/2026 11 AM PST           31.40            675         0              Normal
  11/11/2026 12 PM PST           31.40            675         0              Normal
  11/11/2026 01 PM PST           31.40            675         0              Normal
  11/11/2026 02 PM PST           31.41            678         +              Normal
  11/11/2026 03 PM PST           31.41            678         0              Normal
  11/11/2026 04 PM PST           31.39            672         -              Normal
  11/11/2026 05 PM PST           31.39            672         0              Normal
  11/11/2026 06 PM PST           31.38            669         -              Normal
  11/11/2026 07 PM PST           31.38            669         0              Normal
  11/11/2026 08 PM PST           31.37            666         -              Normal
  11/11/2026 09 PM PST           31.37            666         0              Normal
  11/11/2026 10 PM PST           31.38            669         +              Normal
  11/11/2026 11 PM PST           31.37            666         -              Normal
  11/12/2026 12 AM PST           31.38            669         +              Normal
  11/12/2026 01 AM PST           31.38            669         0              Normal
  11/12/2026 02 AM PST           31.38            669         0              Normal
  11/12/2026 03 AM PST           31.38            669         0              Normal
  11/12/2026 04 AM PST           31.38            669         0              Normal
  11/12/2026 05 AM PST           31.38            669         0              Normal
  11/12/2026 06 AM PST           31.38            669         0              Normal
  11/12/2026 07 AM PST           31.38            669         0              Normal
  11/12/2026 08 AM PST           31.39            672         +              Normal
  11/12/2026 09 AM PST           31.39            672         0              Normal
  11/12/2026 10 AM PST           31.39            672         0              Normal
  11/12/2026 11 AM PST           31.41            678         +              Normal
  11/12/2026 12 PM PST           31.41            678         0              Normal
  11/12/2026 01 PM PST           31.41            678         0              Normal
  11/12/2026 02 PM PST           31.42            682         +              Normal
  11/12/2026 03 PM PST           31.43            685         +              Normal
  11/12/2026 04 PM PST           31.43            685         0              Normal
  11/12/2026 05 PM PST           31.42            682         -              Normal
  11/12/2026 06 PM PST           31.42            682         0              Normal
  11/12/2026 07 PM PST           31.42            682         0              Normal
  11/12/2026 08 PM PST           31.41            678         -              Normal
  11/12/2026 09 PM PST           31.42            682         +              Normal
  11/12/2026 10 PM PST           31.41            678         -              Normal
  11/12/2026 11 PM PST           31.41            678         0              Normal
  11/13/2026 12 AM PST           31.41            678         0              Normal
  11/13/2026 01 AM PST           31.41            678         0              Normal
  11/13/2026 02 AM PST           31.41            678         0              Normal
  11/13/2026 03 AM PST           31.40            675         -              Normal
  11/13/2026 04 AM PST           31.41            678         +              Normal
  11/13/2026 05 AM PST           31.42            682         +              Normal
  11/13/2026 06 AM PST           31.42            682         0              Normal
  11/13/2026 07 AM PST           31.42            682         0              Normal
  11/13/2026 08 AM PST           31.44            688         +              Normal
  11/13/2026 09 AM PST           31.46            695         +              Normal
  11/13/2026 10 AM PST           31.47            698         +              Normal
  11/13/2026 11 AM PST           31.53            718         +              Normal
  11/13/2026 12 PM PST           31.60            742         +              Normal
  11/13/2026 01 PM PST           31.63            752         +              Normal
  11/13/2026 02 PM PST           31.65            759         +              Normal
  11/13/2026 03 PM PST           31.67            765         +              Normal
  11/13/2026 04 PM PST           31.70            776         +              Normal
  11/13/2026 05 PM PST           31.71            779         +              Normal
  11/13/2026 06 PM PST           31.73            786         +              Normal
  11/13/2026 07 PM PST           31.73            786         0              Normal
  11/13/2026 08 PM PST           31.73            786         0              Normal
  11/13/2026 09 PM PST           31.72            783         -              Normal
  11/13/2026 10 PM PST           31.71            779         -              Normal
  11/13/2026 11 PM PST           31.71            779         0              Normal
  11/14/2026 12 AM PST           31.70            776         -              Normal
  11/14/2026 01 AM PST           31.70            776         0              Normal
  11/14/2026 02 AM PST           31.70            776         0              Normal
  11/14/2026 03 AM PST           31.70            776         0              Normal
  11/14/2026 04 AM PST           31.69            772         -              Normal
  11/14/2026 05 AM PST           31.69            772         0              Normal
  11/14/2026 06 AM PST           31.69            772         0              Normal
  11/14/2026 07 AM PST           31.70            776         +              Normal
  11/14/2026 08 AM PST           31.70            776         0              Normal
  11/14/2026 09 AM PST           31.70            776         0              Normal
  11/14/2026 10 AM PST           31.70            776         0              Normal
  11/14/2026 11 AM PST           31.71            779         +              Normal
  11/14/2026 12 PM PST           31.71            779         0              Normal
  11/14/2026 01 PM PST           31.71            779         0              Normal
  11/14/2026 02 PM PST           31.71            779         0              Normal
  11/14/2026 03 PM PST           31.71            779         0              Normal
  11/14/2026 04 PM PST           31.70            776         -              Normal
  11/14/2026 05 PM PST           31.70            776         0              Normal
  11/14/2026 06 PM PST           31.70            776         0              Normal
  11/14/2026 07 PM PST           31.70            776         0              Normal
  11/14/2026 08 PM PST           31.70            776         0              Normal
  11/14/2026 09 PM PST           31.70            776         0              Normal
  11/14/2026 10 PM PST           31.70            776         0              Normal
  11/14/2026 11 PM PST           31.70            776         0              Normal
  11/15/2026 12 AM PST           31.70            776         0              Normal
  11/15/2026 01 AM PST           31.70            776         0              Normal
  11/15/2026 02 AM PST           31.71            779         +              Normal
  11/15/2026 03 AM PST           31.71            779         0              Normal
  11/15/2026 04 AM PST           31.72            783         +              Normal
  11/15/2026 05 AM PST           31.72            783         0              Normal
  11/15/2026 06 AM PST           31.73            786         +              Normal
  11/15/2026 07 AM PST           31.73            786         0              Normal
  11/15/2026 08 AM PST           31.73            786         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  11/15/2026 09 AM PST           31.74            790                        Normal
  11/15/2026 10 AM PST           31.74            790         0              Normal
  11/15/2026 11 AM PST           31.74            790         0              Normal
  11/15/2026 12 PM PST           31.75            793         +              Normal
  11/15/2026 01 PM PST           31.75            793         0              Normal
  11/15/2026 02 PM PST           31.76            797         +              Normal
  11/15/2026 03 PM PST           31.76            797         0              Normal
  11/15/2026 04 PM PST           31.77            800         +              Normal
  11/15/2026 05 PM PST           31.77            800         0              Normal
  11/15/2026 06 PM PST           31.77            800         0              Normal
  11/15/2026 07 PM PST           31.78            804         +              Normal
  11/15/2026 08 PM PST           31.78            804         0              Normal
  11/15/2026 09 PM PST           31.79            807         +              Normal
  11/15/2026 10 PM PST           31.79            807         0              Normal
  11/15/2026 11 PM PST           31.79            807         0              Normal
  11/16/2026 12 AM PST           31.80            811         +              Normal
  11/16/2026 01 AM PST           31.80            811         0              Normal
  11/16/2026 02 AM PST           31.80            811         0              Normal
  11/16/2026 03 AM PST           31.81            814         +              Normal
  11/16/2026 04 AM PST           31.81            814         0              Normal
  11/16/2026 05 AM PST           31.81            814         0              Normal
  11/16/2026 06 AM PST           31.82            818         +              Normal
  11/16/2026 07 AM PST           31.82            818         0              Normal
  11/16/2026 08 AM PST           31.82            818         0              Normal
  11/16/2026 09 AM PST           31.82            818         0              Normal
  11/16/2026 10 AM PST           31.83            821         +              Normal
  11/16/2026 11 AM PST           31.83            821         0              Normal
  11/16/2026 12 PM PST           31.83            821         0              Normal
  11/16/2026 01 PM PST           31.83            821         0              Normal
  11/16/2026 02 PM PST           31.83            821         0              Normal
  11/16/2026 03 PM PST           31.84            825         +              Normal
  11/16/2026 04 PM PST           31.84            825         0              Normal
  11/16/2026 05 PM PST           31.84            825         0              Normal
  11/16/2026 06 PM PST           31.84            825         0              Normal
  11/16/2026 07 PM PST           31.84            825         0              Normal
  11/16/2026 08 PM PST           31.84            825         0              Normal
  11/16/2026 09 PM PST           31.85            828         +              Normal
  11/16/2026 10 PM PST           31.85            828         0              Normal
  11/16/2026 11 PM PST           31.85            828         0              Normal
  11/17/2026 12 AM PST           31.85            828         0              Normal
  11/17/2026 01 AM PST           31.85            828         0              Normal
  11/17/2026 02 AM PST           31.85            828         0              Normal
  11/17/2026 03 AM PST           31.85            828         0              Normal
  11/17/2026 04 AM PST           31.85            828         0              Normal
  11/17/2026 05 AM PST           31.86            832         +              Normal
  11/17/2026 06 AM PST           31.86            832         0              Normal
  11/17/2026 07 AM PST           31.86            832         0              Normal
  11/17/2026 08 AM PST           31.86            832         0              Normal
  11/17/2026 09 AM PST           31.86            832         0              Normal
  11/17/2026 10 AM PST           31.86            832         0              Normal
  11/17/2026 11 AM PST           31.86            832         0              Normal
  11/17/2026 12 PM PST           31.86            832         0              Normal
  11/17/2026 01 PM PST           31.86            832         0              Normal
  11/17/2026 02 PM PST           31.86            832         0              Normal
  11/17/2026 03 PM PST           31.86            832         0              Normal
  11/17/2026 04 PM PST           31.86            832         0              Normal
  11/17/2026 05 PM PST           31.86            832         0              Normal
  11/17/2026 06 PM PST           31.86            832         0              Normal
  11/17/2026 07 PM PST           31.86            832         0              Normal
  11/17/2026 08 PM PST           31.86            832         0              Normal
  11/17/2026 09 PM PST           31.86            832         0              Normal
  11/17/2026 10 PM PST           31.86            832         0              Normal
  11/17/2026 11 PM PST           31.86            832         0              Normal
  11/18/2026 12 AM PST           31.87            836         +              Normal
  11/18/2026 01 AM PST           31.87            836         0              Normal
  11/18/2026 02 AM PST           31.87            836         0              Normal
  11/18/2026 03 AM PST           31.87            836         0              Normal
  11/18/2026 04 AM PST           31.87            836         0              Normal
  11/18/2026 05 AM PST           31.87            836         0              Normal
  11/18/2026 06 AM PST           31.87            836         0              Normal
  11/18/2026 07 AM PST           31.87            836         0              Normal
  11/18/2026 08 AM PST           31.87            836         0              Normal
  11/18/2026 09 AM PST           31.87            836         0              Normal
  11/18/2026 10 AM PST           31.87            836         0              Normal
  11/18/2026 11 AM PST           31.87            836         0              Normal
  11/18/2026 12 PM PST           31.87            836         0              Normal
  11/18/2026 01 PM PST           31.87            836         0              Normal
  11/18/2026 02 PM PST           31.87            836         0              Normal
  11/18/2026 03 PM PST           31.87            836         0              Normal
  11/18/2026 04 PM PST           31.87            836         0              Normal
  11/18/2026 05 PM PST           31.87            836         0              Normal
  11/18/2026 06 PM PST           31.87            836         0              Normal
  11/18/2026 07 PM PST           31.87            836         0              Normal
  11/18/2026 08 PM PST           31.87            836         0              Normal
  11/18/2026 09 PM PST           31.87            836         0              Normal
  11/18/2026 10 PM PST           31.87            836         0              Normal
  11/18/2026 11 PM PST           31.87            836         0              Normal
  11/19/2026 12 AM PST           31.87            836         0              Normal
  11/19/2026 01 AM PST           31.87            836         0              Normal
  11/19/2026 02 AM PST           31.87            836         0              Normal
  11/19/2026 03 AM PST           31.87            836         0              Normal
  11/19/2026 04 AM PST           31.87            836         0              Normal
  11/19/2026 05 AM PST           31.87            836         0              Normal
  11/19/2026 06 AM PST           31.87            836         0              Normal
  11/19/2026 07 AM PST           31.87            836         0              Normal
  11/19/2026 08 AM PST           31.87            836         0              Normal
  11/19/2026 09 AM PST           31.87            836         0              Normal
  11/19/2026 10 AM PST           31.87            836         0              Normal
  11/19/2026 11 AM PST           31.87            836         0              Normal
  11/19/2026 12 PM PST           31.87            836         0              Normal
  11/19/2026 01 PM PST           31.87            836         0              Normal
  11/19/2026 02 PM PST           31.87            836         0              Normal
  11/19/2026 03 PM PST           31.87            836         0              Normal
  11/19/2026 04 PM PST           31.87            836         0              Normal
  11/19/2026 05 PM PST           31.87            836         0              Normal
  11/19/2026 06 PM PST           31.87            836         0              Normal
  11/19/2026 07 PM PST           31.87            836         0              Normal
  11/19/2026 08 PM PST           31.87            836         0              Normal
  11/19/2026 09 PM PST           31.87            836         0              Normal
  11/19/2026 10 PM PST           31.87            836         0              Normal
  11/19/2026 11 PM PST           31.87            836         0              Normal
  11/20/2026 12 AM PST           31.87            836         0              Normal
  11/20/2026 01 AM PST           31.87            836         0              Normal
  11/20/2026 02 AM PST           31.87            836         0              Normal
  11/20/2026 03 AM PST           31.87            836         0              Normal
  11/20/2026 04 AM PST           31.87            836         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.