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: Oct 26 2026 at 6:59 AM PDTNext Issuance: Oct 27 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:  10/26/2026 at 06:59 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/26/2026 at 06:00 AM PDT
# Maximum Observed Stage:                       32.41 Feet
# Maximum Observed Flow:                        1037 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/26/2026 at 12:00 PM PDT
# Maximum Forecast Stage:                       32.44 Feet
# Maximum Forecast Flow:                        1048 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/21/2026 06 AM PDT           31.00            559                        Normal
  10/21/2026 07 AM PDT           31.00            559         0              Normal
  10/21/2026 08 AM PDT           30.99            556         -              Normal
  10/21/2026 09 AM PDT           30.98            553         -              Normal
  10/21/2026 10 AM PDT           30.98            553         0              Normal
  10/21/2026 11 AM PDT           31.00            559         +              Normal
  10/21/2026 12 PM PDT           30.99            556         -              Normal
  10/21/2026 01 PM PDT           30.99            556         0              Normal
  10/21/2026 02 PM PDT           31.00            559         +              Normal
  10/21/2026 03 PM PDT           31.00            559         0              Normal
  10/21/2026 04 PM PDT           31.01            561         +              Normal
  10/21/2026 05 PM PDT           31.03            567         +              Normal
  10/21/2026 06 PM PDT           31.03            567         0              Normal
  10/21/2026 07 PM PDT           31.05            573         +              Normal
  10/21/2026 08 PM PDT           31.05            573         0              Normal
  10/21/2026 09 PM PDT           31.04            570         -              Normal
  10/21/2026 10 PM PDT           31.05            573         +              Normal
  10/21/2026 11 PM PDT           31.05            573         0              Normal
  10/22/2026 12 AM PDT           31.05            573         0              Normal
  10/22/2026 01 AM PDT           31.05            573         0              Normal
  10/22/2026 02 AM PDT           31.05            573         0              Normal
  10/22/2026 03 AM PDT           31.05            573         0              Normal
  10/22/2026 04 AM PDT           31.09            584         +              Normal
  10/22/2026 05 AM PDT           31.10            587         +              Normal
  10/22/2026 06 AM PDT           31.10            587         0              Normal
  10/22/2026 07 AM PDT           31.12            593         +              Normal
  10/22/2026 08 AM PDT           31.12            593         0              Normal
  10/22/2026 09 AM PDT           31.13            595         +              Normal
  10/22/2026 10 AM PDT           31.14            598         +              Normal
  10/22/2026 11 AM PDT           31.15            601         +              Normal
  10/22/2026 12 PM PDT           31.17            607         +              Normal
  10/22/2026 01 PM PDT           31.18            610         +              Normal
  10/22/2026 02 PM PDT           31.19            613         +              Normal
  10/22/2026 03 PM PDT           31.19            613         0              Normal
  10/22/2026 04 PM PDT           31.20            616         +              Normal
  10/22/2026 05 PM PDT           31.22            622         +              Normal
  10/22/2026 06 PM PDT           31.23            624         +              Normal
  10/22/2026 07 PM PDT           31.24            627         +              Normal
  10/22/2026 08 PM PDT           31.24            627         0              Normal
  10/22/2026 09 PM PDT           31.26            633         +              Normal
  10/22/2026 10 PM PDT           31.26            633         0              Normal
  10/22/2026 11 PM PDT           31.23            624         -              Normal
  10/23/2026 12 AM PDT           31.24            627         +              Normal
  10/23/2026 01 AM PDT           31.24            627         0              Normal
  10/23/2026 02 AM PDT           31.23            624         -              Normal
  10/23/2026 03 AM PDT           31.23            624         0              Normal
  10/23/2026 04 AM PDT           31.23            624         0              Normal
  10/23/2026 05 AM PDT           31.22            622         -              Normal
  10/23/2026 06 AM PDT           31.23            624         +              Normal
  10/23/2026 07 AM PDT           31.24            627         +              Normal
  10/23/2026 08 AM PDT           31.25            630         +              Normal
  10/23/2026 09 AM PDT           31.27            636         +              Normal
  10/23/2026 10 AM PDT           31.30            645         +              Normal
  10/23/2026 11 AM PDT           31.27            636         -              Normal
  10/23/2026 12 PM PDT           31.29            642         +              Normal
  10/23/2026 01 PM PDT           31.31            648         +              Normal
  10/23/2026 02 PM PDT           31.36            663         +              Normal
  10/23/2026 03 PM PDT           31.36            663         0              Normal
  10/23/2026 04 PM PDT           31.35            660         -              Normal
  10/23/2026 05 PM PDT           31.37            666         +              Normal
  10/23/2026 06 PM PDT           31.38            669         +              Normal
  10/23/2026 07 PM PDT           31.37            666         -              Normal
  10/23/2026 08 PM PDT           31.38            669         +              Normal
  10/23/2026 09 PM PDT           31.38            669         0              Normal
  10/23/2026 10 PM PDT           31.38            669         0              Normal
  10/23/2026 11 PM PDT           31.38            669         0              Normal
  10/24/2026 12 AM PDT           31.38            669         0              Normal
  10/24/2026 01 AM PDT           31.38            669         0              Normal
  10/24/2026 02 AM PDT           31.39            672         +              Normal
  10/24/2026 03 AM PDT           31.39            672         0              Normal
  10/24/2026 04 AM PDT           31.40            675         +              Normal
  10/24/2026 05 AM PDT           31.41            678         +              Normal
  10/24/2026 06 AM PDT           31.42            682         +              Normal
  10/24/2026 07 AM PDT           31.43            685         +              Normal
  10/24/2026 08 AM PDT           31.44            688         +              Normal
  10/24/2026 09 AM PDT           31.45            691         +              Normal
  10/24/2026 10 AM PDT           31.46            695         +              Normal
  10/24/2026 11 AM PDT           31.47            698         +              Normal
  10/24/2026 12 PM PDT           31.48            701         +              Normal
  10/24/2026 01 PM PDT           31.48            701         0              Normal
  10/24/2026 02 PM PDT           31.48            701         0              Normal
  10/24/2026 03 PM PDT           31.49            705         +              Normal
  10/24/2026 04 PM PDT           31.49            705         0              Normal
  10/24/2026 05 PM PDT           31.49            705         0              Normal
  10/24/2026 06 PM PDT           31.49            705         0              Normal
  10/24/2026 07 PM PDT           31.50            708         +              Normal
  10/24/2026 08 PM PDT           31.51            711         +              Normal
  10/24/2026 09 PM PDT           31.52            715         +              Normal
  10/24/2026 10 PM PDT           31.53            718         +              Normal
  10/24/2026 11 PM PDT           31.55            725         +              Normal
  10/25/2026 12 AM PDT           31.58            735         +              Normal
  10/25/2026 01 AM PDT           31.61            745         +              Normal
  10/25/2026 02 AM PDT           31.65            759         +              Normal
  10/25/2026 03 AM PDT           31.69            772         +              Normal
  10/25/2026 04 AM PDT           31.75            793         +              Normal
  10/25/2026 05 AM PDT           31.79            807         +              Normal
  10/25/2026 06 AM PDT           31.84            825         +              Normal
  10/25/2026 07 AM PDT           31.89            843         +              Normal
  10/25/2026 08 AM PDT           31.94            861         +              Normal
  10/25/2026 09 AM PDT           31.99            879         +              Normal
  10/25/2026 10 AM PDT           32.03            893         +              Normal
  10/25/2026 11 AM PDT           32.08            912         +              Normal
  10/25/2026 12 PM PDT           32.13            931         +              Normal
  10/25/2026 01 PM PDT           32.16            942         +              Normal
  10/25/2026 02 PM PDT           32.19            953         +              Normal
  10/25/2026 03 PM PDT           32.21            961         +              Normal
  10/25/2026 04 PM PDT           32.23            968         +              Normal
  10/25/2026 05 PM PDT           32.25            976         +              Normal
  10/25/2026 06 PM PDT           32.26            980         +              Normal
  10/25/2026 07 PM PDT           32.27            983         +              Normal
  10/25/2026 08 PM PDT           32.28            987         +              Normal
  10/25/2026 09 PM PDT           32.29            991         +              Normal
  10/25/2026 10 PM PDT           32.30            995         +              Normal
  10/25/2026 11 PM PDT           32.32           1003         +              Normal
  10/26/2026 12 AM PDT           32.33           1006         +              Normal
  10/26/2026 01 AM PDT           32.35           1014         +              Normal
  10/26/2026 02 AM PDT           32.36           1018         +              Normal
  10/26/2026 03 AM PDT           32.38           1025         +              Normal
  10/26/2026 04 AM PDT           32.40           1033         +              Normal
  10/26/2026 05 AM PDT           32.41           1037         +              Normal
  10/26/2026 06 AM PDT           32.41           1037         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/26/2026 07 AM PDT           32.41           1037                        Normal
  10/26/2026 08 AM PDT           32.42           1041         +              Normal
  10/26/2026 09 AM PDT           32.42           1041         0              Normal
  10/26/2026 10 AM PDT           32.43           1044         +              Normal
  10/26/2026 11 AM PDT           32.43           1044         0              Normal
  10/26/2026 12 PM PDT           32.44           1048         +              Normal
  10/26/2026 01 PM PDT           32.44           1048         0              Normal
  10/26/2026 02 PM PDT           32.44           1048         0              Normal
  10/26/2026 03 PM PDT           32.44           1048         0              Normal
  10/26/2026 04 PM PDT           32.44           1048         0              Normal
  10/26/2026 05 PM PDT           32.43           1044         -              Normal
  10/26/2026 06 PM PDT           32.42           1041         -              Normal
  10/26/2026 07 PM PDT           32.41           1037         -              Normal
  10/26/2026 08 PM PDT           32.40           1033         -              Normal
  10/26/2026 09 PM PDT           32.39           1029         -              Normal
  10/26/2026 10 PM PDT           32.37           1021         -              Normal
  10/26/2026 11 PM PDT           32.35           1014         -              Normal
  10/27/2026 12 AM PDT           32.33           1006         -              Normal
  10/27/2026 01 AM PDT           32.31            999         -              Normal
  10/27/2026 02 AM PDT           32.29            991         -              Normal
  10/27/2026 03 AM PDT           32.26            980         -              Normal
  10/27/2026 04 AM PDT           32.23            968         -              Normal
  10/27/2026 05 AM PDT           32.21            961         -              Normal
  10/27/2026 06 AM PDT           32.19            953         -              Normal
  10/27/2026 07 AM PDT           32.17            946         -              Normal
  10/27/2026 08 AM PDT           32.15            938         -              Normal
  10/27/2026 09 AM PDT           32.14            934         -              Normal
  10/27/2026 10 AM PDT           32.12            927         -              Normal
  10/27/2026 11 AM PDT           32.11            923         -              Normal
  10/27/2026 12 PM PDT           32.10            919         -              Normal
  10/27/2026 01 PM PDT           32.09            916         -              Normal
  10/27/2026 02 PM PDT           32.08            912         -              Normal
  10/27/2026 03 PM PDT           32.06            905         -              Normal
  10/27/2026 04 PM PDT           32.05            901         -              Normal
  10/27/2026 05 PM PDT           32.04            897         -              Normal
  10/27/2026 06 PM PDT           32.03            893         -              Normal
  10/27/2026 07 PM PDT           32.02            890         -              Normal
  10/27/2026 08 PM PDT           32.01            886         -              Normal
  10/27/2026 09 PM PDT           32.01            886         0              Normal
  10/27/2026 10 PM PDT           32.00            883         -              Normal
  10/27/2026 11 PM PDT           31.99            879         -              Normal
  10/28/2026 12 AM PDT           31.98            875         -              Normal
  10/28/2026 01 AM PDT           31.98            875         0              Normal
  10/28/2026 02 AM PDT           31.97            872         -              Normal
  10/28/2026 03 AM PDT           31.96            868         -              Normal
  10/28/2026 04 AM PDT           31.96            868         0              Normal
  10/28/2026 05 AM PDT           31.95            864         -              Normal
  10/28/2026 06 AM PDT           31.94            861         -              Normal
  10/28/2026 07 AM PDT           31.94            861         0              Normal
  10/28/2026 08 AM PDT           31.93            857         -              Normal
  10/28/2026 09 AM PDT           31.92            853         -              Normal
  10/28/2026 10 AM PDT           31.92            853         0              Normal
  10/28/2026 11 AM PDT           31.91            850         -              Normal
  10/28/2026 12 PM PDT           31.90            846         -              Normal
  10/28/2026 01 PM PDT           31.89            843         -              Normal
  10/28/2026 02 PM PDT           31.89            843         0              Normal
  10/28/2026 03 PM PDT           31.88            839         -              Normal
  10/28/2026 04 PM PDT           31.87            836         -              Normal
  10/28/2026 05 PM PDT           31.87            836         0              Normal
  10/28/2026 06 PM PDT           31.86            832         -              Normal
  10/28/2026 07 PM PDT           31.86            832         0              Normal
  10/28/2026 08 PM PDT           31.85            828         -              Normal
  10/28/2026 09 PM PDT           31.85            828         0              Normal
  10/28/2026 10 PM PDT           31.84            825         -              Normal
  10/28/2026 11 PM PDT           31.84            825         0              Normal
  10/29/2026 12 AM PDT           31.84            825         0              Normal
  10/29/2026 01 AM PDT           31.84            825         0              Normal
  10/29/2026 02 AM PDT           31.83            821         -              Normal
  10/29/2026 03 AM PDT           31.83            821         0              Normal
  10/29/2026 04 AM PDT           31.82            818         -              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           31.81            814         -              Normal
  10/29/2026 09 AM PDT           31.81            814         0              Normal
  10/29/2026 10 AM PDT           31.81            814         0              Normal
  10/29/2026 11 AM PDT           31.80            811         -              Normal
  10/29/2026 12 PM PDT           31.80            811         0              Normal
  10/29/2026 01 PM PDT           31.80            811         0              Normal
  10/29/2026 02 PM PDT           31.79            807         -              Normal
  10/29/2026 03 PM PDT           31.79            807         0              Normal
  10/29/2026 04 PM PDT           31.79            807         0              Normal
  10/29/2026 05 PM PDT           31.78            804         -              Normal
  10/29/2026 06 PM PDT           31.78            804         0              Normal
  10/29/2026 07 PM PDT           31.78            804         0              Normal
  10/29/2026 08 PM PDT           31.77            800         -              Normal
  10/29/2026 09 PM PDT           31.77            800         0              Normal
  10/29/2026 10 PM PDT           31.77            800         0              Normal
  10/29/2026 11 PM PDT           31.76            797         -              Normal
  10/30/2026 12 AM PDT           31.76            797         0              Normal
  10/30/2026 01 AM PDT           31.76            797         0              Normal
  10/30/2026 02 AM PDT           31.75            793         -              Normal
  10/30/2026 03 AM PDT           31.75            793         0              Normal
  10/30/2026 04 AM PDT           31.75            793         0              Normal
  10/30/2026 05 AM PDT           31.75            793         0              Normal
  10/30/2026 06 AM PDT           31.74            790         -              Normal
  10/30/2026 07 AM PDT           31.74            790         0              Normal
  10/30/2026 08 AM PDT           31.73            786         -              Normal
  10/30/2026 09 AM PDT           31.73            786         0              Normal
  10/30/2026 10 AM PDT           31.73            786         0              Normal
  10/30/2026 11 AM PDT           31.73            786         0              Normal
  10/30/2026 12 PM PDT           31.72            783         -              Normal
  10/30/2026 01 PM PDT           31.72            783         0              Normal
  10/30/2026 02 PM PDT           31.72            783         0              Normal
  10/30/2026 03 PM PDT           31.71            779         -              Normal
  10/30/2026 04 PM PDT           31.71            779         0              Normal
  10/30/2026 05 PM PDT           31.71            779         0              Normal
  10/30/2026 06 PM PDT           31.70            776         -              Normal
  10/30/2026 07 PM PDT           31.70            776         0              Normal
  10/30/2026 08 PM PDT           31.70            776         0              Normal
  10/30/2026 09 PM PDT           31.69            772         -              Normal
  10/30/2026 10 PM PDT           31.69            772         0              Normal
  10/30/2026 11 PM PDT           31.69            772         0              Normal
  10/31/2026 12 AM PDT           31.68            769         -              Normal
  10/31/2026 01 AM PDT           31.68            769         0              Normal
  10/31/2026 02 AM PDT           31.68            769         0              Normal
  10/31/2026 03 AM PDT           31.68            769         0              Normal
  10/31/2026 04 AM PDT           31.67            765         -              Normal
  10/31/2026 05 AM PDT           31.67            765         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.