SAN JOAQUIN RIVER - PATTERSON (PATC1)
Latitude: 37.49º NLongitude: 121.08º WElevation: 97 Feet
Location: Stanislaus County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Dec 31 2025 at 2:01 PM PSTNext Issuance: Jan 01 2026 at 9:00 AM PST
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:  12/31/2025 at 02:01 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  12/30/2025 at 09:00 AM PST
# Maximum Observed Stage:                       32.67 Feet
# Maximum Observed Flow:                        983 cfs
#
# Earliest Date & Time of Maximum Forecast:     01/05/2026 at 04:00 AM PST
# Maximum Forecast Stage:                       33.90 Feet
# Maximum Forecast Flow:                        1487 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  12/26/2025 02 PM PST           32.19            807                        Normal
  12/26/2025 03 PM PST           32.20            811         +              Normal
  12/26/2025 04 PM PST           32.20            811         0              Normal
  12/26/2025 05 PM PST           32.21            814         +              Normal
  12/26/2025 06 PM PST           32.21            814         0              Normal
  12/26/2025 07 PM PST           32.22            818         +              Normal
  12/26/2025 08 PM PST           32.23            821         +              Normal
  12/26/2025 09 PM PST           32.24            825         +              Normal
  12/26/2025 10 PM PST           32.26            832         +              Normal
  12/26/2025 11 PM PST           32.27            836         +              Normal
  12/27/2025 12 AM PST           32.28            839         +              Normal
  12/27/2025 01 AM PST           32.30            846         +              Normal
  12/27/2025 02 AM PST           32.32            853         +              Normal
  12/27/2025 03 AM PST           32.32            853         0              Normal
  12/27/2025 04 AM PST           32.33            857         +              Normal
  12/27/2025 05 AM PST           32.34            861         +              Normal
  12/27/2025 06 AM PST           32.35            864         +              Normal
  12/27/2025 07 AM PST           32.35            864         0              Normal
  12/27/2025 08 AM PST           32.36            868         +              Normal
  12/27/2025 09 AM PST           32.37            872         +              Normal
  12/27/2025 10 AM PST           32.37            872         0              Normal
  12/27/2025 11 AM PST           32.37            872         0              Normal
  12/27/2025 12 PM PST           32.37            872         0              Normal
  12/27/2025 01 PM PST           32.37            872         0              Normal
  12/27/2025 02 PM PST           32.37            872         0              Normal
  12/27/2025 03 PM PST           32.37            872         0              Normal
  12/27/2025 04 PM PST           32.39            879         +              Normal
  12/27/2025 05 PM PST           32.39            879         0              Normal
  12/27/2025 06 PM PST           32.39            879         0              Normal
  12/27/2025 07 PM PST           32.39            879         0              Normal
  12/27/2025 08 PM PST           32.40            883         +              Normal
  12/27/2025 09 PM PST           32.40            883         0              Normal
  12/27/2025 10 PM PST           32.41            886         +              Normal
  12/27/2025 11 PM PST           32.41            886         0              Normal
  12/28/2025 12 AM PST           32.41            886         0              Normal
  12/28/2025 01 AM PST           32.42            890         +              Normal
  12/28/2025 02 AM PST           32.42            890         0              Normal
  12/28/2025 03 AM PST           32.41            886         -              Normal
  12/28/2025 04 AM PST           32.42            890         +              Normal
  12/28/2025 05 AM PST           32.42            890         0              Normal
  12/28/2025 06 AM PST           32.41            886         -              Normal
  12/28/2025 07 AM PST           32.42            890         +              Normal
  12/28/2025 08 AM PST           32.42            890         0              Normal
  12/28/2025 09 AM PST           32.42            890         0              Normal
  12/28/2025 10 AM PST           32.42            890         0              Normal
  12/28/2025 11 AM PST           32.44            897         +              Normal
  12/28/2025 12 PM PST           32.44            897         0              Normal
  12/28/2025 01 PM PST           32.45            901         +              Normal
  12/28/2025 02 PM PST           32.46            905         +              Normal
  12/28/2025 03 PM PST           32.47            908         +              Normal
  12/28/2025 04 PM PST           32.47            908         0              Normal
  12/28/2025 05 PM PST           32.47            908         0              Normal
  12/28/2025 06 PM PST           32.49            916         +              Normal
  12/28/2025 07 PM PST           32.49            916         0              Normal
  12/28/2025 08 PM PST           32.50            919         +              Normal
  12/28/2025 09 PM PST           32.51            923         +              Normal
  12/28/2025 10 PM PST           32.52            927         +              Normal
  12/28/2025 11 PM PST           32.53            931         +              Normal
  12/29/2025 12 AM PST           32.53            931         0              Normal
  12/29/2025 01 AM PST           32.54            934         +              Normal
  12/29/2025 02 AM PST           32.54            934         0              Normal
  12/29/2025 03 AM PST           32.56            942         +              Normal
  12/29/2025 04 AM PST           32.57            946         +              Normal
  12/29/2025 05 AM PST           32.56            942         -              Normal
  12/29/2025 06 AM PST           32.57            946         +              Normal
  12/29/2025 07 AM PST           32.59            953         +              Normal
  12/29/2025 08 AM PST           32.59            953         0              Normal
  12/29/2025 09 AM PST           32.60            957         +              Normal
  12/29/2025 10 AM PST           32.60            957         0              Normal
  12/29/2025 11 AM PST           32.61            961         +              Normal
  12/29/2025 12 PM PST           32.62            964         +              Normal
  12/29/2025 01 PM PST           32.62            964         0              Normal
  12/29/2025 02 PM PST           32.63            968         +              Normal
  12/29/2025 03 PM PST           32.64            972         +              Normal
  12/29/2025 04 PM PST           32.63            968         -              Normal
  12/29/2025 05 PM PST           32.64            972         +              Normal
  12/29/2025 06 PM PST           32.64            972         0              Normal
  12/29/2025 07 PM PST           32.64            972         0              Normal
  12/29/2025 08 PM PST           32.66            980         +              Normal
  12/29/2025 09 PM PST           32.65            976         -              Normal
  12/29/2025 10 PM PST           32.65            976         0              Normal
  12/29/2025 11 PM PST           32.66            980         +              Normal
  12/30/2025 12 AM PST           32.65            976         -              Normal
  12/30/2025 01 AM PST           32.66            980         +              Normal
  12/30/2025 02 AM PST           32.67            983         +              Normal
  12/30/2025 03 AM PST           32.66            980         -              Normal
  12/30/2025 04 AM PST           32.65            976         -              Normal
  12/30/2025 05 AM PST           32.67            983         +              Normal
  12/30/2025 06 AM PST           32.66            980         -              Normal
  12/30/2025 07 AM PST           32.66            980         0              Normal
  12/30/2025 08 AM PST           32.66            980         0              Normal
  12/30/2025 09 AM PST           32.67            983         +              Normal
  12/30/2025 10 AM PST           32.66            980         -              Normal
  12/30/2025 11 AM PST           32.66            980         0              Normal
  12/30/2025 12 PM PST           32.66            980         0              Normal
  12/30/2025 01 PM PST           32.65            976         -              Normal
  12/30/2025 02 PM PST           32.65            976         0              Normal
  12/30/2025 03 PM PST           32.64            972         -              Normal
  12/30/2025 04 PM PST           32.64            972         0              Normal
  12/30/2025 05 PM PST           32.64            972         0              Normal
  12/30/2025 06 PM PST           32.64            972         0              Normal
  12/30/2025 07 PM PST           32.62            964         -              Normal
  12/30/2025 08 PM PST           32.62            964         0              Normal
  12/30/2025 09 PM PST           32.61            961         -              Normal
  12/30/2025 10 PM PST           32.61            961         0              Normal
  12/30/2025 11 PM PST           32.61            961         0              Normal
  12/31/2025 12 AM PST           32.60            957         -              Normal
  12/31/2025 01 AM PST           32.60            957         0              Normal
  12/31/2025 02 AM PST           32.59            953         -              Normal
  12/31/2025 03 AM PST           32.58            949         -              Normal
  12/31/2025 04 AM PST           32.58            949         0              Normal
  12/31/2025 05 AM PST           32.57            946         -              Normal
  12/31/2025 06 AM PST           32.56            942         -              Normal
  12/31/2025 07 AM PST           32.56            942         0              Normal
  12/31/2025 08 AM PST           32.56            942         0              Normal
  12/31/2025 09 AM PST           32.54            934         -              Normal
  12/31/2025 10 AM PST           32.53            931         -              Normal
  12/31/2025 11 AM PST           32.53            931         0              Normal
  12/31/2025 12 PM PST           32.53            931         0              Normal
  12/31/2025 01 PM PST           32.52            927         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  12/31/2025 02 PM PST           32.52            927                        Normal
  12/31/2025 03 PM PST           32.51            923         -              Normal
  12/31/2025 04 PM PST           32.51            923         0              Normal
  12/31/2025 05 PM PST           32.50            919         -              Normal
  12/31/2025 06 PM PST           32.49            916         -              Normal
  12/31/2025 07 PM PST           32.48            912         -              Normal
  12/31/2025 08 PM PST           32.48            912         0              Normal
  12/31/2025 09 PM PST           32.47            908         -              Normal
  12/31/2025 10 PM PST           32.46            905         -              Normal
  12/31/2025 11 PM PST           32.45            901         -              Normal
  01/01/2026 12 AM PST           32.45            901         0              Normal
  01/01/2026 01 AM PST           32.44            897         -              Normal
  01/01/2026 02 AM PST           32.43            893         -              Normal
  01/01/2026 03 AM PST           32.43            893         0              Normal
  01/01/2026 04 AM PST           32.42            890         -              Normal
  01/01/2026 05 AM PST           32.41            886         -              Normal
  01/01/2026 06 AM PST           32.41            886         0              Normal
  01/01/2026 07 AM PST           32.40            883         -              Normal
  01/01/2026 08 AM PST           32.39            879         -              Normal
  01/01/2026 09 AM PST           32.39            879         0              Normal
  01/01/2026 10 AM PST           32.38            875         -              Normal
  01/01/2026 11 AM PST           32.37            872         -              Normal
  01/01/2026 12 PM PST           32.37            872         0              Normal
  01/01/2026 01 PM PST           32.36            868         -              Normal
  01/01/2026 02 PM PST           32.36            868         0              Normal
  01/01/2026 03 PM PST           32.35            864         -              Normal
  01/01/2026 04 PM PST           32.34            861         -              Normal
  01/01/2026 05 PM PST           32.34            861         0              Normal
  01/01/2026 06 PM PST           32.33            857         -              Normal
  01/01/2026 07 PM PST           32.33            857         0              Normal
  01/01/2026 08 PM PST           32.33            857         0              Normal
  01/01/2026 09 PM PST           32.32            853         -              Normal
  01/01/2026 10 PM PST           32.32            853         0              Normal
  01/01/2026 11 PM PST           32.31            850         -              Normal
  01/02/2026 12 AM PST           32.31            850         0              Normal
  01/02/2026 01 AM PST           32.30            846         -              Normal
  01/02/2026 02 AM PST           32.30            846         0              Normal
  01/02/2026 03 AM PST           32.30            846         0              Normal
  01/02/2026 04 AM PST           32.30            846         0              Normal
  01/02/2026 05 AM PST           32.31            850         +              Normal
  01/02/2026 06 AM PST           32.35            864         +              Normal
  01/02/2026 07 AM PST           32.43            893         +              Normal
  01/02/2026 08 AM PST           32.54            934         +              Normal
  01/02/2026 09 AM PST           32.64            972         +              Normal
  01/02/2026 10 AM PST           32.74           1010         +              Normal
  01/02/2026 11 AM PST           32.84           1048         +              Normal
  01/02/2026 12 PM PST           32.93           1083         +              Normal
  01/02/2026 01 PM PST           33.02           1118         +              Normal
  01/02/2026 02 PM PST           33.09           1146         +              Normal
  01/02/2026 03 PM PST           33.16           1174         +              Normal
  01/02/2026 04 PM PST           33.22           1198         +              Normal
  01/02/2026 05 PM PST           33.28           1223         +              Normal
  01/02/2026 06 PM PST           33.33           1243         +              Normal
  01/02/2026 07 PM PST           33.37           1260         +              Normal
  01/02/2026 08 PM PST           33.41           1276         +              Normal
  01/02/2026 09 PM PST           33.44           1289         +              Normal
  01/02/2026 10 PM PST           33.47           1302         +              Normal
  01/02/2026 11 PM PST           33.49           1310         +              Normal
  01/03/2026 12 AM PST           33.52           1323         +              Normal
  01/03/2026 01 AM PST           33.54           1331         +              Normal
  01/03/2026 02 AM PST           33.56           1340         +              Normal
  01/03/2026 03 AM PST           33.59           1352         +              Normal
  01/03/2026 04 AM PST           33.60           1357         +              Normal
  01/03/2026 05 AM PST           33.62           1365         +              Normal
  01/03/2026 06 AM PST           33.63           1369         +              Normal
  01/03/2026 07 AM PST           33.64           1374         +              Normal
  01/03/2026 08 AM PST           33.65           1378         +              Normal
  01/03/2026 09 AM PST           33.66           1382         +              Normal
  01/03/2026 10 AM PST           33.66           1382         0              Normal
  01/03/2026 11 AM PST           33.67           1387         +              Normal
  01/03/2026 12 PM PST           33.67           1387         0              Normal
  01/03/2026 01 PM PST           33.67           1387         0              Normal
  01/03/2026 02 PM PST           33.66           1382         -              Normal
  01/03/2026 03 PM PST           33.66           1382         0              Normal
  01/03/2026 04 PM PST           33.65           1378         -              Normal
  01/03/2026 05 PM PST           33.64           1374         -              Normal
  01/03/2026 06 PM PST           33.63           1369         -              Normal
  01/03/2026 07 PM PST           33.62           1365         -              Normal
  01/03/2026 08 PM PST           33.60           1357         -              Normal
  01/03/2026 09 PM PST           33.59           1352         -              Normal
  01/03/2026 10 PM PST           33.57           1344         -              Normal
  01/03/2026 11 PM PST           33.55           1335         -              Normal
  01/04/2026 12 AM PST           33.53           1327         -              Normal
  01/04/2026 01 AM PST           33.52           1323         -              Normal
  01/04/2026 02 AM PST           33.50           1314         -              Normal
  01/04/2026 03 AM PST           33.49           1310         -              Normal
  01/04/2026 04 AM PST           33.48           1306         -              Normal
  01/04/2026 05 AM PST           33.50           1314         +              Normal
  01/04/2026 06 AM PST           33.52           1323         +              Normal
  01/04/2026 07 AM PST           33.55           1335         +              Normal
  01/04/2026 08 AM PST           33.60           1357         +              Normal
  01/04/2026 09 AM PST           33.64           1374         +              Normal
  01/04/2026 10 AM PST           33.68           1391         +              Normal
  01/04/2026 11 AM PST           33.72           1408         +              Normal
  01/04/2026 12 PM PST           33.75           1421         +              Normal
  01/04/2026 01 PM PST           33.78           1434         +              Normal
  01/04/2026 02 PM PST           33.80           1443         +              Normal
  01/04/2026 03 PM PST           33.81           1447         +              Normal
  01/04/2026 04 PM PST           33.83           1456         +              Normal
  01/04/2026 05 PM PST           33.83           1456         0              Normal
  01/04/2026 06 PM PST           33.84           1461         +              Normal
  01/04/2026 07 PM PST           33.84           1461         0              Normal
  01/04/2026 08 PM PST           33.84           1461         0              Normal
  01/04/2026 09 PM PST           33.84           1461         0              Normal
  01/04/2026 10 PM PST           33.84           1461         0              Normal
  01/04/2026 11 PM PST           33.84           1461         0              Normal
  01/05/2026 12 AM PST           33.85           1465         +              Normal
  01/05/2026 01 AM PST           33.85           1465         0              Normal
  01/05/2026 02 AM PST           33.86           1469         +              Normal
  01/05/2026 03 AM PST           33.88           1478         +              Normal
  01/05/2026 04 AM PST           33.90           1487         +              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.