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 01 2026 at 8:44 AM PSTNext Issuance: Nov 02 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:  11/01/2026 at 08:45 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/27/2026 at 09:00 AM PDT
# Maximum Observed Stage:                       32.31 Feet
# Maximum Observed Flow:                        999 cfs
#
# Earliest Date & Time of Maximum Forecast:     11/01/2026 at 09:00 AM PST
# Maximum Forecast Stage:                       32.01 Feet
# Maximum Forecast Flow:                        886 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/27/2026 09 AM PDT           32.31            999                        Normal
  10/27/2026 10 AM PDT           32.29            991         -              Normal
  10/27/2026 11 AM PDT           32.28            987         -              Normal
  10/27/2026 12 PM PDT           32.28            987         0              Normal
  10/27/2026 01 PM PDT           32.25            976         -              Normal
  10/27/2026 02 PM PDT           32.24            972         -              Normal
  10/27/2026 03 PM PDT           32.24            972         0              Normal
  10/27/2026 04 PM PDT           32.23            968         -              Normal
  10/27/2026 05 PM PDT           32.22            964         -              Normal
  10/27/2026 06 PM PDT           32.21            961         -              Normal
  10/27/2026 07 PM PDT           32.21            961         0              Normal
  10/27/2026 08 PM PDT           32.18            949         -              Normal
  10/27/2026 09 PM PDT           32.17            946         -              Normal
  10/27/2026 10 PM PDT           32.16            942         -              Normal
  10/27/2026 11 PM PDT           32.15            938         -              Normal
  10/28/2026 12 AM PDT           32.13            931         -              Normal
  10/28/2026 01 AM PDT           32.12            927         -              Normal
  10/28/2026 02 AM PDT           32.10            919         -              Normal
  10/28/2026 03 AM PDT           32.08            912         -              Normal
  10/28/2026 04 AM PDT           32.07            908         -              Normal
  10/28/2026 05 AM PDT           32.05            901         -              Normal
  10/28/2026 06 AM PDT           32.03            893         -              Normal
  10/28/2026 07 AM PDT           32.02            890         -              Normal
  10/28/2026 08 AM PDT           31.99            879         -              Normal
  10/28/2026 09 AM PDT           31.98            875         -              Normal
  10/28/2026 10 AM PDT           31.95            864         -              Normal
  10/28/2026 11 AM PDT           31.94            861         -              Normal
  10/28/2026 12 PM PDT           31.91            850         -              Normal
  10/28/2026 01 PM PDT           31.90            846         -              Normal
  10/28/2026 02 PM PDT           31.89            843         -              Normal
  10/28/2026 03 PM PDT           31.87            836         -              Normal
  10/28/2026 04 PM PDT           31.85            828         -              Normal
  10/28/2026 05 PM PDT           31.85            828         0              Normal
  10/28/2026 06 PM PDT           31.83            821         -              Normal
  10/28/2026 07 PM PDT           31.83            821         0              Normal
  10/28/2026 08 PM PDT           31.82            818         -              Normal
  10/28/2026 09 PM PDT           31.82            818         0              Normal
  10/28/2026 10 PM PDT           31.82            818         0              Normal
  10/28/2026 11 PM PDT           31.82            818         0              Normal
  10/29/2026 12 AM PDT           31.83            821         +              Normal
  10/29/2026 01 AM PDT           31.83            821         0              Normal
  10/29/2026 02 AM PDT           31.83            821         0              Normal
  10/29/2026 03 AM PDT           31.82            818         -              Normal
  10/29/2026 04 AM PDT           31.82            818         0              Normal
  10/29/2026 05 AM PDT           31.82            818         0              Normal
  10/29/2026 06 AM PDT           31.82            818         0              Normal
  10/29/2026 07 AM PDT           31.82            818         0              Normal
  10/29/2026 08 AM PDT           31.80            811         -              Normal
  10/29/2026 09 AM PDT           31.81            814         +              Normal
  10/29/2026 10 AM PDT           31.81            814         0              Normal
  10/29/2026 11 AM PDT           31.81            814         0              Normal
  10/29/2026 12 PM PDT           31.81            814         0              Normal
  10/29/2026 01 PM PDT           31.81            814         0              Normal
  10/29/2026 02 PM PDT           31.81            814         0              Normal
  10/29/2026 03 PM PDT           31.81            814         0              Normal
  10/29/2026 04 PM PDT           31.81            814         0              Normal
  10/29/2026 05 PM PDT           31.81            814         0              Normal
  10/29/2026 06 PM PDT           31.81            814         0              Normal
  10/29/2026 07 PM PDT           31.82            818         +              Normal
  10/29/2026 08 PM PDT           31.82            818         0              Normal
  10/29/2026 09 PM PDT           31.82            818         0              Normal
  10/29/2026 10 PM PDT           31.83            821         +              Normal
  10/29/2026 11 PM PDT           31.84            825         +              Normal
  10/30/2026 12 AM PDT           31.84            825         0              Normal
  10/30/2026 01 AM PDT           31.84            825         0              Normal
  10/30/2026 02 AM PDT           31.85            828         +              Normal
  10/30/2026 03 AM PDT           31.85            828         0              Normal
  10/30/2026 04 AM PDT           31.85            828         0              Normal
  10/30/2026 05 AM PDT           31.86            832         +              Normal
  10/30/2026 06 AM PDT           31.89            843         +              Normal
  10/30/2026 07 AM PDT           31.91            850         +              Normal
  10/30/2026 08 AM PDT           31.93            857         +              Normal
  10/30/2026 09 AM PDT           31.95            864         +              Normal
  10/30/2026 10 AM PDT           31.97            872         +              Normal
  10/30/2026 11 AM PDT           31.95            864         -              Normal
  10/30/2026 12 PM PDT           31.96            868         +              Normal
  10/30/2026 01 PM PDT           31.96            868         0              Normal
  10/30/2026 02 PM PDT           31.97            872         +              Normal
  10/30/2026 03 PM PDT           31.96            868         -              Normal
  10/30/2026 04 PM PDT           31.94            861         -              Normal
  10/30/2026 05 PM PDT           31.96            868         +              Normal
  10/30/2026 06 PM PDT           31.95            864         -              Normal
  10/30/2026 07 PM PDT           31.95            864         0              Normal
  10/30/2026 08 PM PDT           31.95            864         0              Normal
  10/30/2026 09 PM PDT           31.95            864         0              Normal
  10/30/2026 10 PM PDT           31.95            864         0              Normal
  10/30/2026 11 PM PDT           31.96            868         +              Normal
  10/31/2026 12 AM PDT           31.96            868         0              Normal
  10/31/2026 01 AM PDT           31.97            872         +              Normal
  10/31/2026 02 AM PDT           31.98            875         +              Normal
  10/31/2026 03 AM PDT           31.98            875         0              Normal
  10/31/2026 04 AM PDT           31.99            879         +              Normal
  10/31/2026 05 AM PDT           31.98            875         -              Normal
  10/31/2026 06 AM PDT           31.97            872         -              Normal
  10/31/2026 07 AM PDT           31.96            868         -              Normal
  10/31/2026 08 AM PDT           31.95            864         -              Normal
  10/31/2026 09 AM PDT           31.95            864         0              Normal
  10/31/2026 10 AM PDT           31.94            861         -              Normal
  10/31/2026 11 AM PDT           31.94            861         0              Normal
  10/31/2026 12 PM PDT           31.94            861         0              Normal
  10/31/2026 01 PM PDT           31.96            868         +              Normal
  10/31/2026 02 PM PDT           31.97            872         +              Normal
  10/31/2026 03 PM PDT           31.97            872         0              Normal
  10/31/2026 04 PM PDT           31.98            875         +              Normal
  10/31/2026 05 PM PDT           31.99            879         +              Normal
  10/31/2026 06 PM PDT           31.99            879         0              Normal
  10/31/2026 07 PM PDT           31.99            879         0              Normal
  10/31/2026 08 PM PDT           31.99            879         0              Normal
  10/31/2026 09 PM PDT           32.00            883         +              Normal
  10/31/2026 10 PM PDT           32.00            883         0              Normal
  10/31/2026 11 PM PDT           31.99            879         -              Normal
  11/01/2026 12 AM PDT           31.99            879         0              Normal
  11/01/2026 01 AM PDT           31.99            879         0              Normal
  11/01/2026 01 AM PST           31.99            879         0              Normal
  11/01/2026 02 AM PST           31.99            879         0              Normal
  11/01/2026 03 AM PST           32.00            883         +              Normal
  11/01/2026 04 AM PST           32.00            883         0              Normal
  11/01/2026 05 AM PST           32.01            886         +              Normal
  11/01/2026 06 AM PST           32.01            886         0              Normal
  11/01/2026 07 AM PST           32.01            886         0              Normal
  11/01/2026 08 AM PST           32.01            886         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  11/01/2026 09 AM PST           32.01            886                        Normal
  11/01/2026 10 AM PST           32.01            886         0              Normal
  11/01/2026 11 AM PST           32.01            886         0              Normal
  11/01/2026 12 PM PST           32.01            886         0              Normal
  11/01/2026 01 PM PST           32.01            886         0              Normal
  11/01/2026 02 PM PST           32.01            886         0              Normal
  11/01/2026 03 PM PST           32.01            886         0              Normal
  11/01/2026 04 PM PST           32.01            886         0              Normal
  11/01/2026 05 PM PST           32.01            886         0              Normal
  11/01/2026 06 PM PST           32.01            886         0              Normal
  11/01/2026 07 PM PST           32.01            886         0              Normal
  11/01/2026 08 PM PST           32.01            886         0              Normal
  11/01/2026 09 PM PST           32.01            886         0              Normal
  11/01/2026 10 PM PST           32.01            886         0              Normal
  11/01/2026 11 PM PST           32.01            886         0              Normal
  11/02/2026 12 AM PST           32.01            886         0              Normal
  11/02/2026 01 AM PST           32.01            886         0              Normal
  11/02/2026 02 AM PST           32.01            886         0              Normal
  11/02/2026 03 AM PST           32.01            886         0              Normal
  11/02/2026 04 AM PST           32.01            886         0              Normal
  11/02/2026 05 AM PST           32.01            886         0              Normal
  11/02/2026 06 AM PST           32.01            886         0              Normal
  11/02/2026 07 AM PST           32.01            886         0              Normal
  11/02/2026 08 AM PST           32.01            886         0              Normal
  11/02/2026 09 AM PST           32.01            886         0              Normal
  11/02/2026 10 AM PST           32.01            886         0              Normal
  11/02/2026 11 AM PST           32.01            886         0              Normal
  11/02/2026 12 PM PST           32.01            886         0              Normal
  11/02/2026 01 PM PST           32.01            886         0              Normal
  11/02/2026 02 PM PST           32.00            883         -              Normal
  11/02/2026 03 PM PST           32.00            883         0              Normal
  11/02/2026 04 PM PST           32.00            883         0              Normal
  11/02/2026 05 PM PST           32.00            883         0              Normal
  11/02/2026 06 PM PST           32.00            883         0              Normal
  11/02/2026 07 PM PST           32.00            883         0              Normal
  11/02/2026 08 PM PST           32.00            883         0              Normal
  11/02/2026 09 PM PST           32.00            883         0              Normal
  11/02/2026 10 PM PST           32.00            883         0              Normal
  11/02/2026 11 PM PST           31.99            879         -              Normal
  11/03/2026 12 AM PST           31.99            879         0              Normal
  11/03/2026 01 AM PST           31.99            879         0              Normal
  11/03/2026 02 AM PST           31.99            879         0              Normal
  11/03/2026 03 AM PST           31.99            879         0              Normal
  11/03/2026 04 AM PST           31.99            879         0              Normal
  11/03/2026 05 AM PST           31.99            879         0              Normal
  11/03/2026 06 AM PST           31.99            879         0              Normal
  11/03/2026 07 AM PST           31.98            875         -              Normal
  11/03/2026 08 AM PST           31.98            875         0              Normal
  11/03/2026 09 AM PST           31.98            875         0              Normal
  11/03/2026 10 AM PST           31.98            875         0              Normal
  11/03/2026 11 AM PST           31.98            875         0              Normal
  11/03/2026 12 PM PST           31.98            875         0              Normal
  11/03/2026 01 PM PST           31.98            875         0              Normal
  11/03/2026 02 PM PST           31.98            875         0              Normal
  11/03/2026 03 PM PST           31.98            875         0              Normal
  11/03/2026 04 PM PST           31.97            872         -              Normal
  11/03/2026 05 PM PST           31.97            872         0              Normal
  11/03/2026 06 PM PST           31.97            872         0              Normal
  11/03/2026 07 PM PST           31.97            872         0              Normal
  11/03/2026 08 PM PST           31.97            872         0              Normal
  11/03/2026 09 PM PST           31.97            872         0              Normal
  11/03/2026 10 PM PST           31.97            872         0              Normal
  11/03/2026 11 PM PST           31.97            872         0              Normal
  11/04/2026 12 AM PST           31.97            872         0              Normal
  11/04/2026 01 AM PST           31.97            872         0              Normal
  11/04/2026 02 AM PST           31.97            872         0              Normal
  11/04/2026 03 AM PST           31.97            872         0              Normal
  11/04/2026 04 AM PST           31.97            872         0              Normal
  11/04/2026 05 AM PST           31.97            872         0              Normal
  11/04/2026 06 AM PST           31.97            872         0              Normal
  11/04/2026 07 AM PST           31.97            872         0              Normal
  11/04/2026 08 AM PST           31.97            872         0              Normal
  11/04/2026 09 AM PST           31.97            872         0              Normal
  11/04/2026 10 AM PST           31.97            872         0              Normal
  11/04/2026 11 AM PST           31.97            872         0              Normal
  11/04/2026 12 PM PST           31.97            872         0              Normal
  11/04/2026 01 PM PST           31.97            872         0              Normal
  11/04/2026 02 PM PST           31.97            872         0              Normal
  11/04/2026 03 PM PST           31.97            872         0              Normal
  11/04/2026 04 PM PST           31.97            872         0              Normal
  11/04/2026 05 PM PST           31.97            872         0              Normal
  11/04/2026 06 PM PST           31.97            872         0              Normal
  11/04/2026 07 PM PST           31.97            872         0              Normal
  11/04/2026 08 PM PST           31.97            872         0              Normal
  11/04/2026 09 PM PST           31.97            872         0              Normal
  11/04/2026 10 PM PST           31.97            872         0              Normal
  11/04/2026 11 PM PST           31.97            872         0              Normal
  11/05/2026 12 AM PST           31.97            872         0              Normal
  11/05/2026 01 AM PST           31.98            875         +              Normal
  11/05/2026 02 AM PST           31.98            875         0              Normal
  11/05/2026 03 AM PST           31.98            875         0              Normal
  11/05/2026 04 AM PST           31.98            875         0              Normal
  11/05/2026 05 AM PST           31.98            875         0              Normal
  11/05/2026 06 AM PST           31.98            875         0              Normal
  11/05/2026 07 AM PST           31.98            875         0              Normal
  11/05/2026 08 AM PST           31.98            875         0              Normal
  11/05/2026 09 AM PST           31.98            875         0              Normal
  11/05/2026 10 AM PST           31.98            875         0              Normal
  11/05/2026 11 AM PST           31.98            875         0              Normal
  11/05/2026 12 PM PST           31.99            879         +              Normal
  11/05/2026 01 PM PST           31.99            879         0              Normal
  11/05/2026 02 PM PST           31.99            879         0              Normal
  11/05/2026 03 PM PST           31.99            879         0              Normal
  11/05/2026 04 PM PST           31.99            879         0              Normal
  11/05/2026 05 PM PST           31.99            879         0              Normal
  11/05/2026 06 PM PST           31.99            879         0              Normal
  11/05/2026 07 PM PST           31.99            879         0              Normal
  11/05/2026 08 PM PST           31.99            879         0              Normal
  11/05/2026 09 PM PST           32.00            883         +              Normal
  11/05/2026 10 PM PST           32.00            883         0              Normal
  11/05/2026 11 PM PST           32.00            883         0              Normal
  11/06/2026 12 AM PST           32.00            883         0              Normal
  11/06/2026 01 AM PST           32.00            883         0              Normal
  11/06/2026 02 AM PST           32.00            883         0              Normal
  11/06/2026 03 AM PST           32.00            883         0              Normal
  11/06/2026 04 AM PST           32.00            883         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.