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: May 02 2026 at 8:36 AM PDTNext Issuance: May 03 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:  05/02/2026 at 08:36 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/27/2026 at 02:00 PM PDT
# Maximum Observed Stage:                       32.96 Feet
# Maximum Observed Flow:                        1256 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/02/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       32.37 Feet
# Maximum Forecast Flow:                        1021 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/27/2026 08 AM PDT           32.93           1243                        Normal
  04/27/2026 09 AM PDT           32.96           1256         +              Normal
  04/27/2026 10 AM PDT           32.95           1252         -              Normal
  04/27/2026 11 AM PDT           32.94           1247         -              Normal
  04/27/2026 12 PM PDT           32.94           1247         0              Normal
  04/27/2026 01 PM PDT           32.95           1252         +              Normal
  04/27/2026 02 PM PDT           32.96           1256         +              Normal
  04/27/2026 03 PM PDT           32.92           1239         -              Normal
  04/27/2026 04 PM PDT           32.94           1247         +              Normal
  04/27/2026 05 PM PDT           32.94           1247         0              Normal
  04/27/2026 06 PM PDT           32.92           1239         -              Normal
  04/27/2026 07 PM PDT           32.93           1243         +              Normal
  04/27/2026 08 PM PDT           32.92           1239         -              Normal
  04/27/2026 09 PM PDT           32.93           1243         +              Normal
  04/27/2026 10 PM PDT           32.92           1239         -              Normal
  04/27/2026 11 PM PDT           32.91           1235         -              Normal
  04/28/2026 12 AM PDT           32.91           1235         0              Normal
  04/28/2026 01 AM PDT           32.90           1231         -              Normal
  04/28/2026 02 AM PDT           32.90           1231         0              Normal
  04/28/2026 03 AM PDT           32.89           1227         -              Normal
  04/28/2026 04 AM PDT           32.90           1231         +              Normal
  04/28/2026 05 AM PDT           32.90           1231         0              Normal
  04/28/2026 06 AM PDT           32.89           1227         -              Normal
  04/28/2026 07 AM PDT           32.89           1227         0              Normal
  04/28/2026 08 AM PDT           32.88           1223         -              Normal
  04/28/2026 09 AM PDT           32.88           1223         0              Normal
  04/28/2026 10 AM PDT           32.86           1215         -              Normal
  04/28/2026 11 AM PDT           32.85           1210         -              Normal
  04/28/2026 12 PM PDT           32.86           1215         +              Normal
  04/28/2026 01 PM PDT           32.84           1206         -              Normal
  04/28/2026 02 PM PDT           32.84           1206         0              Normal
  04/28/2026 03 PM PDT           32.83           1202         -              Normal
  04/28/2026 04 PM PDT           32.82           1198         -              Normal
  04/28/2026 05 PM PDT           32.82           1198         0              Normal
  04/28/2026 06 PM PDT           32.82           1198         0              Normal
  04/28/2026 07 PM PDT           32.81           1194         -              Normal
  04/28/2026 08 PM PDT           32.80           1190         -              Normal
  04/28/2026 09 PM PDT           32.79           1186         -              Normal
  04/28/2026 10 PM PDT           32.79           1186         0              Normal
  04/28/2026 11 PM PDT           32.79           1186         0              Normal
  04/29/2026 12 AM PDT           32.79           1186         0              Normal
  04/29/2026 01 AM PDT           32.78           1182         -              Normal
  04/29/2026 02 AM PDT           32.78           1182         0              Normal
  04/29/2026 03 AM PDT           32.77           1178         -              Normal
  04/29/2026 04 AM PDT           32.77           1178         0              Normal
  04/29/2026 05 AM PDT           32.76           1174         -              Normal
  04/29/2026 06 AM PDT           32.76           1174         0              Normal
  04/29/2026 07 AM PDT           32.76           1174         0              Normal
  04/29/2026 08 AM PDT           32.75           1170         -              Normal
  04/29/2026 09 AM PDT           32.74           1166         -              Normal
  04/29/2026 10 AM PDT           32.73           1162         -              Normal
  04/29/2026 11 AM PDT           32.71           1154         -              Normal
  04/29/2026 12 PM PDT           32.69           1146         -              Normal
  04/29/2026 01 PM PDT           32.65           1130         -              Normal
  04/29/2026 02 PM PDT           32.67           1138         +              Normal
  04/29/2026 03 PM PDT           32.66           1134         -              Normal
  04/29/2026 04 PM PDT           32.63           1122         -              Normal
  04/29/2026 05 PM PDT           32.64           1126         +              Normal
  04/29/2026 06 PM PDT           32.62           1118         -              Normal
  04/29/2026 07 PM PDT           32.64           1126         +              Normal
  04/29/2026 08 PM PDT           32.63           1122         -              Normal
  04/29/2026 09 PM PDT           32.63           1122         0              Normal
  04/29/2026 10 PM PDT           32.62           1118         -              Normal
  04/29/2026 11 PM PDT           32.61           1114         -              Normal
  04/30/2026 12 AM PDT           32.61           1114         0              Normal
  04/30/2026 01 AM PDT           32.61           1114         0              Normal
  04/30/2026 02 AM PDT           32.60           1110         -              Normal
  04/30/2026 03 AM PDT           32.60           1110         0              Normal
  04/30/2026 04 AM PDT           32.59           1106         -              Normal
  04/30/2026 05 AM PDT           32.59           1106         0              Normal
  04/30/2026 06 AM PDT           32.57           1099         -              Normal
  04/30/2026 07 AM PDT           32.56           1095         -              Normal
  04/30/2026 08 AM PDT           32.55           1091         -              Normal
  04/30/2026 09 AM PDT           32.55           1091         0              Normal
  04/30/2026 10 AM PDT           32.53           1083         -              Normal
  04/30/2026 11 AM PDT           32.53           1083         0              Normal
  04/30/2026 12 PM PDT           32.53           1083         0              Normal
  04/30/2026 01 PM PDT           32.52           1079         -              Normal
  04/30/2026 02 PM PDT           32.51           1075         -              Normal
  04/30/2026 03 PM PDT           32.49           1067         -              Normal
  04/30/2026 04 PM PDT           32.49           1067         0              Normal
  04/30/2026 05 PM PDT           32.48           1064         -              Normal
  04/30/2026 06 PM PDT           32.49           1067         +              Normal
  04/30/2026 07 PM PDT           32.48           1064         -              Normal
  04/30/2026 08 PM PDT           32.47           1060         -              Normal
  04/30/2026 09 PM PDT           32.46           1056         -              Normal
  04/30/2026 10 PM PDT           32.46           1056         0              Normal
  04/30/2026 11 PM PDT           32.46           1056         0              Normal
  05/01/2026 12 AM PDT           32.46           1056         0              Normal
  05/01/2026 01 AM PDT           32.45           1052         -              Normal
  05/01/2026 02 AM PDT           32.44           1048         -              Normal
  05/01/2026 03 AM PDT           32.43           1044         -              Normal
  05/01/2026 04 AM PDT           32.42           1041         -              Normal
  05/01/2026 05 AM PDT           32.42           1041         0              Normal
  05/01/2026 06 AM PDT           32.42           1041         0              Normal
  05/01/2026 07 AM PDT           32.41           1037         -              Normal
  05/01/2026 08 AM PDT           32.42           1041         +              Normal
  05/01/2026 09 AM PDT           32.40           1033         -              Normal
  05/01/2026 10 AM PDT           32.41           1037         +              Normal
  05/01/2026 11 AM PDT           32.41           1037         0              Normal
  05/01/2026 12 PM PDT           32.40           1033         -              Normal
  05/01/2026 01 PM PDT           32.40           1033         0              Normal
  05/01/2026 02 PM PDT           32.40           1033         0              Normal
  05/01/2026 03 PM PDT           32.41           1037         +              Normal
  05/01/2026 04 PM PDT           32.41           1037         0              Normal
  05/01/2026 05 PM PDT           32.42           1041         +              Normal
  05/01/2026 06 PM PDT           32.42           1041         0              Normal
  05/01/2026 07 PM PDT           32.42           1041         0              Normal
  05/01/2026 08 PM PDT           32.41           1037         -              Normal
  05/01/2026 09 PM PDT           32.40           1033         -              Normal
  05/01/2026 10 PM PDT           32.40           1033         0              Normal
  05/01/2026 11 PM PDT           32.39           1029         -              Normal
  05/02/2026 12 AM PDT           32.39           1029         0              Normal
  05/02/2026 01 AM PDT           32.39           1029         0              Normal
  05/02/2026 02 AM PDT           32.38           1025         -              Normal
  05/02/2026 03 AM PDT           32.38           1025         0              Normal
  05/02/2026 04 AM PDT           32.38           1025         0              Normal
  05/02/2026 05 AM PDT           32.38           1025         0              Normal
  05/02/2026 06 AM PDT           32.38           1025         0              Normal
  05/02/2026 07 AM PDT           32.38           1025         0              Normal
  05/02/2026 08 AM PDT           32.37           1021         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/02/2026 09 AM PDT           32.37           1021                        Normal
  05/02/2026 10 AM PDT           32.36           1018         -              Normal
  05/02/2026 11 AM PDT           32.35           1014         -              Normal
  05/02/2026 12 PM PDT           32.35           1014         0              Normal
  05/02/2026 01 PM PDT           32.34           1010         -              Normal
  05/02/2026 02 PM PDT           32.34           1010         0              Normal
  05/02/2026 03 PM PDT           32.33           1006         -              Normal
  05/02/2026 04 PM PDT           32.32           1003         -              Normal
  05/02/2026 05 PM PDT           32.32           1003         0              Normal
  05/02/2026 06 PM PDT           32.31            999         -              Normal
  05/02/2026 07 PM PDT           32.31            999         0              Normal
  05/02/2026 08 PM PDT           32.30            995         -              Normal
  05/02/2026 09 PM PDT           32.30            995         0              Normal
  05/02/2026 10 PM PDT           32.29            991         -              Normal
  05/02/2026 11 PM PDT           32.29            991         0              Normal
  05/03/2026 12 AM PDT           32.28            987         -              Normal
  05/03/2026 01 AM PDT           32.28            987         0              Normal
  05/03/2026 02 AM PDT           32.27            983         -              Normal
  05/03/2026 03 AM PDT           32.27            983         0              Normal
  05/03/2026 04 AM PDT           32.26            980         -              Normal
  05/03/2026 05 AM PDT           32.26            980         0              Normal
  05/03/2026 06 AM PDT           32.25            976         -              Normal
  05/03/2026 07 AM PDT           32.25            976         0              Normal
  05/03/2026 08 AM PDT           32.24            972         -              Normal
  05/03/2026 09 AM PDT           32.24            972         0              Normal
  05/03/2026 10 AM PDT           32.23            968         -              Normal
  05/03/2026 11 AM PDT           32.23            968         0              Normal
  05/03/2026 12 PM PDT           32.23            968         0              Normal
  05/03/2026 01 PM PDT           32.22            964         -              Normal
  05/03/2026 02 PM PDT           32.22            964         0              Normal
  05/03/2026 03 PM PDT           32.21            961         -              Normal
  05/03/2026 04 PM PDT           32.21            961         0              Normal
  05/03/2026 05 PM PDT           32.20            957         -              Normal
  05/03/2026 06 PM PDT           32.20            957         0              Normal
  05/03/2026 07 PM PDT           32.20            957         0              Normal
  05/03/2026 08 PM PDT           32.19            953         -              Normal
  05/03/2026 09 PM PDT           32.19            953         0              Normal
  05/03/2026 10 PM PDT           32.19            953         0              Normal
  05/03/2026 11 PM PDT           32.19            953         0              Normal
  05/04/2026 12 AM PDT           32.18            949         -              Normal
  05/04/2026 01 AM PDT           32.18            949         0              Normal
  05/04/2026 02 AM PDT           32.18            949         0              Normal
  05/04/2026 03 AM PDT           32.17            946         -              Normal
  05/04/2026 04 AM PDT           32.17            946         0              Normal
  05/04/2026 05 AM PDT           32.17            946         0              Normal
  05/04/2026 06 AM PDT           32.16            942         -              Normal
  05/04/2026 07 AM PDT           32.16            942         0              Normal
  05/04/2026 08 AM PDT           32.16            942         0              Normal
  05/04/2026 09 AM PDT           32.16            942         0              Normal
  05/04/2026 10 AM PDT           32.16            942         0              Normal
  05/04/2026 11 AM PDT           32.15            938         -              Normal
  05/04/2026 12 PM PDT           32.15            938         0              Normal
  05/04/2026 01 PM PDT           32.15            938         0              Normal
  05/04/2026 02 PM PDT           32.15            938         0              Normal
  05/04/2026 03 PM PDT           32.15            938         0              Normal
  05/04/2026 04 PM PDT           32.15            938         0              Normal
  05/04/2026 05 PM PDT           32.15            938         0              Normal
  05/04/2026 06 PM PDT           32.14            934         -              Normal
  05/04/2026 07 PM PDT           32.14            934         0              Normal
  05/04/2026 08 PM PDT           32.14            934         0              Normal
  05/04/2026 09 PM PDT           32.14            934         0              Normal
  05/04/2026 10 PM PDT           32.14            934         0              Normal
  05/04/2026 11 PM PDT           32.14            934         0              Normal
  05/05/2026 12 AM PDT           32.14            934         0              Normal
  05/05/2026 01 AM PDT           32.13            931         -              Normal
  05/05/2026 02 AM PDT           32.13            931         0              Normal
  05/05/2026 03 AM PDT           32.13            931         0              Normal
  05/05/2026 04 AM PDT           32.13            931         0              Normal
  05/05/2026 05 AM PDT           32.13            931         0              Normal
  05/05/2026 06 AM PDT           32.13            931         0              Normal
  05/05/2026 07 AM PDT           32.13            931         0              Normal
  05/05/2026 08 AM PDT           32.13            931         0              Normal
  05/05/2026 09 AM PDT           32.13            931         0              Normal
  05/05/2026 10 AM PDT           32.13            931         0              Normal
  05/05/2026 11 AM PDT           32.13            931         0              Normal
  05/05/2026 12 PM PDT           32.13            931         0              Normal
  05/05/2026 01 PM PDT           32.13            931         0              Normal
  05/05/2026 02 PM PDT           32.13            931         0              Normal
  05/05/2026 03 PM PDT           32.13            931         0              Normal
  05/05/2026 04 PM PDT           32.13            931         0              Normal
  05/05/2026 05 PM PDT           32.13            931         0              Normal
  05/05/2026 06 PM PDT           32.13            931         0              Normal
  05/05/2026 07 PM PDT           32.13            931         0              Normal
  05/05/2026 08 PM PDT           32.13            931         0              Normal
  05/05/2026 09 PM PDT           32.13            931         0              Normal
  05/05/2026 10 PM PDT           32.13            931         0              Normal
  05/05/2026 11 PM PDT           32.13            931         0              Normal
  05/06/2026 12 AM PDT           32.13            931         0              Normal
  05/06/2026 01 AM PDT           32.13            931         0              Normal
  05/06/2026 02 AM PDT           32.13            931         0              Normal
  05/06/2026 03 AM PDT           32.13            931         0              Normal
  05/06/2026 04 AM PDT           32.13            931         0              Normal
  05/06/2026 05 AM PDT           32.13            931         0              Normal
  05/06/2026 06 AM PDT           32.13            931         0              Normal
  05/06/2026 07 AM PDT           32.13            931         0              Normal
  05/06/2026 08 AM PDT           32.13            931         0              Normal
  05/06/2026 09 AM PDT           32.13            931         0              Normal
  05/06/2026 10 AM PDT           32.13            931         0              Normal
  05/06/2026 11 AM PDT           32.13            931         0              Normal
  05/06/2026 12 PM PDT           32.13            931         0              Normal
  05/06/2026 01 PM PDT           32.13            931         0              Normal
  05/06/2026 02 PM PDT           32.13            931         0              Normal
  05/06/2026 03 PM PDT           32.13            931         0              Normal
  05/06/2026 04 PM PDT           32.13            931         0              Normal
  05/06/2026 05 PM PDT           32.13            931         0              Normal
  05/06/2026 06 PM PDT           32.13            931         0              Normal
  05/06/2026 07 PM PDT           32.13            931         0              Normal
  05/06/2026 08 PM PDT           32.13            931         0              Normal
  05/06/2026 09 PM PDT           32.13            931         0              Normal
  05/06/2026 10 PM PDT           32.13            931         0              Normal
  05/06/2026 11 PM PDT           32.13            931         0              Normal
  05/07/2026 12 AM PDT           32.13            931         0              Normal
  05/07/2026 01 AM PDT           32.13            931         0              Normal
  05/07/2026 02 AM PDT           32.13            931         0              Normal
  05/07/2026 03 AM PDT           32.13            931         0              Normal
  05/07/2026 04 AM PDT           32.13            931         0              Normal
  05/07/2026 05 AM PDT           32.13            931         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.