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: Apr 10 2026 at 1:25 PM PDTNext Issuance: Apr 11 2026 at 9:00 AM PDT
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:  04/10/2026 at 01:25 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/05/2026 at 04:00 PM PDT
# Maximum Observed Stage:                       32.65 Feet
# Maximum Observed Flow:                        1130 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/14/2026 at 09:00 PM PDT
# Maximum Forecast Stage:                       32.19 Feet
# Maximum Forecast Flow:                        953 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/05/2026 01 PM PDT           32.65           1130                        Normal
  04/05/2026 02 PM PDT           32.63           1122         -              Normal
  04/05/2026 03 PM PDT           32.64           1126         +              Normal
  04/05/2026 04 PM PDT           32.65           1130         +              Normal
  04/05/2026 05 PM PDT           32.63           1122         -              Normal
  04/05/2026 06 PM PDT           32.62           1118         -              Normal
  04/05/2026 07 PM PDT           32.61           1114         -              Normal
  04/05/2026 08 PM PDT           32.59           1106         -              Normal
  04/05/2026 09 PM PDT           32.60           1110         +              Normal
  04/05/2026 10 PM PDT           32.60           1110         0              Normal
  04/05/2026 11 PM PDT           32.59           1106         -              Normal
  04/06/2026 12 AM PDT           32.57           1099         -              Normal
  04/06/2026 01 AM PDT           32.58           1103         +              Normal
  04/06/2026 02 AM PDT           32.57           1099         -              Normal
  04/06/2026 03 AM PDT           32.57           1099         0              Normal
  04/06/2026 04 AM PDT           32.56           1095         -              Normal
  04/06/2026 05 AM PDT           32.53           1083         -              Normal
  04/06/2026 06 AM PDT           32.51           1075         -              Normal
  04/06/2026 07 AM PDT           32.52           1079         +              Normal
  04/06/2026 08 AM PDT           32.52           1079         0              Normal
  04/06/2026 09 AM PDT           32.49           1067         -              Normal
  04/06/2026 10 AM PDT           32.49           1067         0              Normal
  04/06/2026 11 AM PDT           32.49           1067         0              Normal
  04/06/2026 12 PM PDT           32.47           1060         -              Normal
  04/06/2026 01 PM PDT           32.46           1056         -              Normal
  04/06/2026 02 PM PDT           32.45           1052         -              Normal
  04/06/2026 03 PM PDT           32.45           1052         0              Normal
  04/06/2026 04 PM PDT           32.44           1048         -              Normal
  04/06/2026 05 PM PDT           32.43           1044         -              Normal
  04/06/2026 06 PM PDT           32.40           1033         -              Normal
  04/06/2026 07 PM PDT           32.39           1029         -              Normal
  04/06/2026 08 PM PDT           32.38           1025         -              Normal
  04/06/2026 09 PM PDT           32.36           1018         -              Normal
  04/06/2026 10 PM PDT           32.35           1014         -              Normal
  04/06/2026 11 PM PDT           32.34           1010         -              Normal
  04/07/2026 12 AM PDT           32.33           1006         -              Normal
  04/07/2026 01 AM PDT           32.32           1003         -              Normal
  04/07/2026 02 AM PDT           32.30            995         -              Normal
  04/07/2026 03 AM PDT           32.30            995         0              Normal
  04/07/2026 04 AM PDT           32.30            995         0              Normal
  04/07/2026 05 AM PDT           32.28            987         -              Normal
  04/07/2026 06 AM PDT           32.27            983         -              Normal
  04/07/2026 07 AM PDT           32.24            972         -              Normal
  04/07/2026 08 AM PDT           32.25            976         +              Normal
  04/07/2026 09 AM PDT           32.23            968         -              Normal
  04/07/2026 10 AM PDT           32.20            957         -              Normal
  04/07/2026 11 AM PDT           32.20            957         0              Normal
  04/07/2026 12 PM PDT           32.19            953         -              Normal
  04/07/2026 01 PM PDT           32.18            949         -              Normal
  04/07/2026 02 PM PDT           32.17            946         -              Normal
  04/07/2026 03 PM PDT           32.17            946         0              Normal
  04/07/2026 04 PM PDT           32.16            942         -              Normal
  04/07/2026 05 PM PDT           32.14            934         -              Normal
  04/07/2026 06 PM PDT           32.14            934         0              Normal
  04/07/2026 07 PM PDT           32.13            931         -              Normal
  04/07/2026 08 PM PDT           32.13            931         0              Normal
  04/07/2026 09 PM PDT           32.12            927         -              Normal
  04/07/2026 10 PM PDT           32.12            927         0              Normal
  04/07/2026 11 PM PDT           32.11            923         -              Normal
  04/08/2026 12 AM PDT           32.11            923         0              Normal
  04/08/2026 01 AM PDT           32.10            919         -              Normal
  04/08/2026 02 AM PDT           32.09            916         -              Normal
  04/08/2026 03 AM PDT           32.08            912         -              Normal
  04/08/2026 04 AM PDT           32.08            912         0              Normal
  04/08/2026 05 AM PDT           32.08            912         0              Normal
  04/08/2026 06 AM PDT           32.08            912         0              Normal
  04/08/2026 07 AM PDT           32.06            905         -              Normal
  04/08/2026 08 AM PDT           32.07            908         +              Normal
  04/08/2026 09 AM PDT           32.08            912         +              Normal
  04/08/2026 10 AM PDT           32.08            912         0              Normal
  04/08/2026 11 AM PDT           32.07            908         -              Normal
  04/08/2026 12 PM PDT           32.08            912         +              Normal
  04/08/2026 01 PM PDT           32.09            916         +              Normal
  04/08/2026 02 PM PDT           32.07            908         -              Normal
  04/08/2026 03 PM PDT           32.09            916         +              Normal
  04/08/2026 04 PM PDT           32.06            905         -              Normal
  04/08/2026 05 PM PDT           32.04            897         -              Normal
  04/08/2026 06 PM PDT           32.04            897         0              Normal
  04/08/2026 07 PM PDT           32.02            890         -              Normal
  04/08/2026 08 PM PDT           32.04            897         +              Normal
  04/08/2026 09 PM PDT           32.02            890         -              Normal
  04/08/2026 10 PM PDT           32.00            883         -              Normal
  04/08/2026 11 PM PDT           32.03            893         +              Normal
  04/09/2026 12 AM PDT           32.00            883         -              Normal
  04/09/2026 01 AM PDT           31.99            879         -              Normal
  04/09/2026 02 AM PDT           32.00            883         +              Normal
  04/09/2026 03 AM PDT           31.99            879         -              Normal
  04/09/2026 04 AM PDT           31.98            875         -              Normal
  04/09/2026 05 AM PDT           31.98            875         0              Normal
  04/09/2026 06 AM PDT           31.97            872         -              Normal
  04/09/2026 07 AM PDT           31.95            864         -              Normal
  04/09/2026 08 AM PDT           31.95            864         0              Normal
  04/09/2026 09 AM PDT           31.94            861         -              Normal
  04/09/2026 10 AM PDT           31.94            861         0              Normal
  04/09/2026 11 AM PDT           31.93            857         -              Normal
  04/09/2026 12 PM PDT           31.92            853         -              Normal
  04/09/2026 01 PM PDT           31.94            861         +              Normal
  04/09/2026 02 PM PDT           31.94            861         0              Normal
  04/09/2026 03 PM PDT           31.94            861         0              Normal
  04/09/2026 04 PM PDT           31.96            868         +              Normal
  04/09/2026 05 PM PDT           31.96            868         0              Normal
  04/09/2026 06 PM PDT           31.95            864         -              Normal
  04/09/2026 07 PM PDT           31.94            861         -              Normal
  04/09/2026 08 PM PDT           31.95            864         +              Normal
  04/09/2026 09 PM PDT           31.94            861         -              Normal
  04/09/2026 10 PM PDT           31.95            864         +              Normal
  04/09/2026 11 PM PDT           31.94            861         -              Normal
  04/10/2026 12 AM PDT           31.95            864         +              Normal
  04/10/2026 01 AM PDT           31.94            861         -              Normal
  04/10/2026 02 AM PDT           31.94            861         0              Normal
  04/10/2026 03 AM PDT           31.94            861         0              Normal
  04/10/2026 04 AM PDT           31.94            861         0              Normal
  04/10/2026 05 AM PDT           31.95            864         +              Normal
  04/10/2026 06 AM PDT           31.96            868         +              Normal
  04/10/2026 07 AM PDT           31.97            872         +              Normal
  04/10/2026 08 AM PDT           31.98            875         +              Normal
  04/10/2026 09 AM PDT           32.00            883         +              Normal
  04/10/2026 10 AM PDT           32.01            886         +              Normal
  04/10/2026 11 AM PDT           32.05            901         +              Normal
  04/10/2026 12 PM PDT           32.07            908         +              Normal
  04/10/2026 01 PM PDT           32.08            912         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/10/2026 02 PM PDT           32.08            912                        Normal
  04/10/2026 03 PM PDT           32.08            912         0              Normal
  04/10/2026 04 PM PDT           32.08            912         0              Normal
  04/10/2026 05 PM PDT           32.08            912         0              Normal
  04/10/2026 06 PM PDT           32.07            908         -              Normal
  04/10/2026 07 PM PDT           32.07            908         0              Normal
  04/10/2026 08 PM PDT           32.06            905         -              Normal
  04/10/2026 09 PM PDT           32.06            905         0              Normal
  04/10/2026 10 PM PDT           32.05            901         -              Normal
  04/10/2026 11 PM PDT           32.05            901         0              Normal
  04/11/2026 12 AM PDT           32.04            897         -              Normal
  04/11/2026 01 AM PDT           32.04            897         0              Normal
  04/11/2026 02 AM PDT           32.03            893         -              Normal
  04/11/2026 03 AM PDT           32.03            893         0              Normal
  04/11/2026 04 AM PDT           32.02            890         -              Normal
  04/11/2026 05 AM PDT           32.02            890         0              Normal
  04/11/2026 06 AM PDT           32.02            890         0              Normal
  04/11/2026 07 AM PDT           32.01            886         -              Normal
  04/11/2026 08 AM PDT           32.01            886         0              Normal
  04/11/2026 09 AM PDT           32.00            883         -              Normal
  04/11/2026 10 AM PDT           31.99            879         -              Normal
  04/11/2026 11 AM PDT           31.99            879         0              Normal
  04/11/2026 12 PM PDT           31.98            875         -              Normal
  04/11/2026 01 PM PDT           31.98            875         0              Normal
  04/11/2026 02 PM PDT           31.97            872         -              Normal
  04/11/2026 03 PM PDT           31.97            872         0              Normal
  04/11/2026 04 PM PDT           31.97            872         0              Normal
  04/11/2026 05 PM PDT           31.97            872         0              Normal
  04/11/2026 06 PM PDT           31.96            868         -              Normal
  04/11/2026 07 PM PDT           31.96            868         0              Normal
  04/11/2026 08 PM PDT           31.97            872         +              Normal
  04/11/2026 09 PM PDT           31.97            872         0              Normal
  04/11/2026 10 PM PDT           31.97            872         0              Normal
  04/11/2026 11 PM PDT           31.97            872         0              Normal
  04/12/2026 12 AM PDT           31.97            872         0              Normal
  04/12/2026 01 AM PDT           31.97            872         0              Normal
  04/12/2026 02 AM PDT           31.97            872         0              Normal
  04/12/2026 03 AM PDT           31.97            872         0              Normal
  04/12/2026 04 AM PDT           31.97            872         0              Normal
  04/12/2026 05 AM PDT           31.98            875         +              Normal
  04/12/2026 06 AM PDT           31.98            875         0              Normal
  04/12/2026 07 AM PDT           31.98            875         0              Normal
  04/12/2026 08 AM PDT           31.98            875         0              Normal
  04/12/2026 09 AM PDT           31.99            879         +              Normal
  04/12/2026 10 AM PDT           31.99            879         0              Normal
  04/12/2026 11 AM PDT           31.99            879         0              Normal
  04/12/2026 12 PM PDT           32.00            883         +              Normal
  04/12/2026 01 PM PDT           32.00            883         0              Normal
  04/12/2026 02 PM PDT           32.00            883         0              Normal
  04/12/2026 03 PM PDT           32.01            886         +              Normal
  04/12/2026 04 PM PDT           32.01            886         0              Normal
  04/12/2026 05 PM PDT           32.02            890         +              Normal
  04/12/2026 06 PM PDT           32.02            890         0              Normal
  04/12/2026 07 PM PDT           32.02            890         0              Normal
  04/12/2026 08 PM PDT           32.03            893         +              Normal
  04/12/2026 09 PM PDT           32.03            893         0              Normal
  04/12/2026 10 PM PDT           32.04            897         +              Normal
  04/12/2026 11 PM PDT           32.04            897         0              Normal
  04/13/2026 12 AM PDT           32.05            901         +              Normal
  04/13/2026 01 AM PDT           32.05            901         0              Normal
  04/13/2026 02 AM PDT           32.05            901         0              Normal
  04/13/2026 03 AM PDT           32.06            905         +              Normal
  04/13/2026 04 AM PDT           32.06            905         0              Normal
  04/13/2026 05 AM PDT           32.06            905         0              Normal
  04/13/2026 06 AM PDT           32.07            908         +              Normal
  04/13/2026 07 AM PDT           32.07            908         0              Normal
  04/13/2026 08 AM PDT           32.08            912         +              Normal
  04/13/2026 09 AM PDT           32.08            912         0              Normal
  04/13/2026 10 AM PDT           32.08            912         0              Normal
  04/13/2026 11 AM PDT           32.09            916         +              Normal
  04/13/2026 12 PM PDT           32.09            916         0              Normal
  04/13/2026 01 PM PDT           32.10            919         +              Normal
  04/13/2026 02 PM PDT           32.10            919         0              Normal
  04/13/2026 03 PM PDT           32.10            919         0              Normal
  04/13/2026 04 PM PDT           32.11            923         +              Normal
  04/13/2026 05 PM PDT           32.11            923         0              Normal
  04/13/2026 06 PM PDT           32.12            927         +              Normal
  04/13/2026 07 PM PDT           32.12            927         0              Normal
  04/13/2026 08 PM PDT           32.12            927         0              Normal
  04/13/2026 09 PM PDT           32.12            927         0              Normal
  04/13/2026 10 PM PDT           32.13            931         +              Normal
  04/13/2026 11 PM PDT           32.13            931         0              Normal
  04/14/2026 12 AM PDT           32.14            934         +              Normal
  04/14/2026 01 AM PDT           32.14            934         0              Normal
  04/14/2026 02 AM PDT           32.14            934         0              Normal
  04/14/2026 03 AM PDT           32.15            938         +              Normal
  04/14/2026 04 AM PDT           32.15            938         0              Normal
  04/14/2026 05 AM PDT           32.15            938         0              Normal
  04/14/2026 06 AM PDT           32.16            942         +              Normal
  04/14/2026 07 AM PDT           32.16            942         0              Normal
  04/14/2026 08 AM PDT           32.16            942         0              Normal
  04/14/2026 09 AM PDT           32.16            942         0              Normal
  04/14/2026 10 AM PDT           32.16            942         0              Normal
  04/14/2026 11 AM PDT           32.17            946         +              Normal
  04/14/2026 12 PM PDT           32.17            946         0              Normal
  04/14/2026 01 PM PDT           32.17            946         0              Normal
  04/14/2026 02 PM PDT           32.17            946         0              Normal
  04/14/2026 03 PM PDT           32.18            949         +              Normal
  04/14/2026 04 PM PDT           32.18            949         0              Normal
  04/14/2026 05 PM PDT           32.18            949         0              Normal
  04/14/2026 06 PM PDT           32.18            949         0              Normal
  04/14/2026 07 PM PDT           32.18            949         0              Normal
  04/14/2026 08 PM PDT           32.18            949         0              Normal
  04/14/2026 09 PM PDT           32.19            953         +              Normal
  04/14/2026 10 PM PDT           32.19            953         0              Normal
  04/14/2026 11 PM PDT           32.19            953         0              Normal
  04/15/2026 12 AM PDT           32.19            953         0              Normal
  04/15/2026 01 AM PDT           32.19            953         0              Normal
  04/15/2026 02 AM PDT           32.19            953         0              Normal
  04/15/2026 03 AM PDT           32.19            953         0              Normal
  04/15/2026 04 AM PDT           32.19            953         0              Normal
  04/15/2026 05 AM PDT           32.19            953         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.