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 29 2026 at 8:51 AM PDTNext Issuance: Apr 30 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:  04/29/2026 at 08:51 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/26/2026 at 07:00 PM PDT
# Maximum Observed Stage:                       32.98 Feet
# Maximum Observed Flow:                        1264 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/29/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       32.75 Feet
# Maximum Forecast Flow:                        1170 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/24/2026 08 AM PDT           32.82           1198                        Normal
  04/24/2026 09 AM PDT           32.82           1198         0              Normal
  04/24/2026 10 AM PDT           32.82           1198         0              Normal
  04/24/2026 11 AM PDT           32.81           1194         -              Normal
  04/24/2026 12 PM PDT           32.81           1194         0              Normal
  04/24/2026 01 PM PDT           32.80           1190         -              Normal
  04/24/2026 02 PM PDT           32.81           1194         +              Normal
  04/24/2026 03 PM PDT           32.81           1194         0              Normal
  04/24/2026 04 PM PDT           32.78           1182         -              Normal
  04/24/2026 05 PM PDT           32.78           1182         0              Normal
  04/24/2026 06 PM PDT           32.77           1178         -              Normal
  04/24/2026 07 PM PDT           32.78           1182         +              Normal
  04/24/2026 08 PM PDT           32.78           1182         0              Normal
  04/24/2026 09 PM PDT           32.76           1174         -              Normal
  04/24/2026 10 PM PDT           32.77           1178         +              Normal
  04/24/2026 11 PM PDT           32.76           1174         -              Normal
  04/25/2026 12 AM PDT           32.78           1182         +              Normal
  04/25/2026 01 AM PDT           32.79           1186         +              Normal
  04/25/2026 02 AM PDT           32.77           1178         -              Normal
  04/25/2026 03 AM PDT           32.78           1182         +              Normal
  04/25/2026 04 AM PDT           32.78           1182         0              Normal
  04/25/2026 05 AM PDT           32.78           1182         0              Normal
  04/25/2026 06 AM PDT           32.80           1190         +              Normal
  04/25/2026 07 AM PDT           32.80           1190         0              Normal
  04/25/2026 08 AM PDT           32.81           1194         +              Normal
  04/25/2026 09 AM PDT           32.82           1198         +              Normal
  04/25/2026 10 AM PDT           32.83           1202         +              Normal
  04/25/2026 11 AM PDT           32.84           1206         +              Normal
  04/25/2026 12 PM PDT           32.85           1210         +              Normal
  04/25/2026 01 PM PDT           32.85           1210         0              Normal
  04/25/2026 02 PM PDT           32.82           1198         -              Normal
  04/25/2026 03 PM PDT           32.82           1198         0              Normal
  04/25/2026 04 PM PDT           32.84           1206         +              Normal
  04/25/2026 05 PM PDT           32.83           1202         -              Normal
  04/25/2026 06 PM PDT           32.84           1206         +              Normal
  04/25/2026 07 PM PDT           32.84           1206         0              Normal
  04/25/2026 08 PM PDT           32.84           1206         0              Normal
  04/25/2026 09 PM PDT           32.83           1202         -              Normal
  04/25/2026 10 PM PDT           32.83           1202         0              Normal
  04/25/2026 11 PM PDT           32.84           1206         +              Normal
  04/26/2026 12 AM PDT           32.84           1206         0              Normal
  04/26/2026 01 AM PDT           32.85           1210         +              Normal
  04/26/2026 02 AM PDT           32.86           1215         +              Normal
  04/26/2026 03 AM PDT           32.87           1219         +              Normal
  04/26/2026 04 AM PDT           32.88           1223         +              Normal
  04/26/2026 05 AM PDT           32.89           1227         +              Normal
  04/26/2026 06 AM PDT           32.89           1227         0              Normal
  04/26/2026 07 AM PDT           32.88           1223         -              Normal
  04/26/2026 08 AM PDT           32.90           1231         +              Normal
  04/26/2026 09 AM PDT           32.92           1239         +              Normal
  04/26/2026 10 AM PDT           32.92           1239         0              Normal
  04/26/2026 11 AM PDT           32.94           1247         +              Normal
  04/26/2026 12 PM PDT           32.97           1260         +              Normal
  04/26/2026 01 PM PDT           32.95           1252         -              Normal
  04/26/2026 02 PM PDT           32.95           1252         0              Normal
  04/26/2026 03 PM PDT           32.97           1260         +              Normal
  04/26/2026 04 PM PDT           32.98           1264         +              Normal
  04/26/2026 05 PM PDT           32.97           1260         -              Normal
  04/26/2026 06 PM PDT           32.97           1260         0              Normal
  04/26/2026 07 PM PDT           32.98           1264         +              Normal
  04/26/2026 08 PM PDT           32.97           1260         -              Normal
  04/26/2026 09 PM PDT           32.97           1260         0              Normal
  04/26/2026 10 PM PDT           32.97           1260         0              Normal
  04/26/2026 11 PM PDT           32.96           1256         -              Normal
  04/27/2026 12 AM PDT           32.94           1247         -              Normal
  04/27/2026 01 AM PDT           32.94           1247         0              Normal
  04/27/2026 02 AM PDT           32.94           1247         0              Normal
  04/27/2026 03 AM PDT           32.95           1252         +              Normal
  04/27/2026 04 AM PDT           32.96           1256         +              Normal
  04/27/2026 05 AM PDT           32.95           1252         -              Normal
  04/27/2026 06 AM PDT           32.95           1252         0              Normal
  04/27/2026 07 AM PDT           32.94           1247         -              Normal
  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
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/29/2026 09 AM PDT           32.75           1170                        Normal
  04/29/2026 10 AM PDT           32.74           1166         -              Normal
  04/29/2026 11 AM PDT           32.74           1166         0              Normal
  04/29/2026 12 PM PDT           32.73           1162         -              Normal
  04/29/2026 01 PM PDT           32.73           1162         0              Normal
  04/29/2026 02 PM PDT           32.72           1158         -              Normal
  04/29/2026 03 PM PDT           32.71           1154         -              Normal
  04/29/2026 04 PM PDT           32.70           1150         -              Normal
  04/29/2026 05 PM PDT           32.70           1150         0              Normal
  04/29/2026 06 PM PDT           32.69           1146         -              Normal
  04/29/2026 07 PM PDT           32.68           1142         -              Normal
  04/29/2026 08 PM PDT           32.67           1138         -              Normal
  04/29/2026 09 PM PDT           32.66           1134         -              Normal
  04/29/2026 10 PM PDT           32.65           1130         -              Normal
  04/29/2026 11 PM PDT           32.64           1126         -              Normal
  04/30/2026 12 AM PDT           32.63           1122         -              Normal
  04/30/2026 01 AM PDT           32.62           1118         -              Normal
  04/30/2026 02 AM PDT           32.61           1114         -              Normal
  04/30/2026 03 AM PDT           32.60           1110         -              Normal
  04/30/2026 04 AM PDT           32.59           1106         -              Normal
  04/30/2026 05 AM PDT           32.58           1103         -              Normal
  04/30/2026 06 AM PDT           32.57           1099         -              Normal
  04/30/2026 07 AM PDT           32.55           1091         -              Normal
  04/30/2026 08 AM PDT           32.54           1087         -              Normal
  04/30/2026 09 AM PDT           32.53           1083         -              Normal
  04/30/2026 10 AM PDT           32.52           1079         -              Normal
  04/30/2026 11 AM PDT           32.51           1075         -              Normal
  04/30/2026 12 PM PDT           32.49           1067         -              Normal
  04/30/2026 01 PM PDT           32.48           1064         -              Normal
  04/30/2026 02 PM PDT           32.47           1060         -              Normal
  04/30/2026 03 PM PDT           32.46           1056         -              Normal
  04/30/2026 04 PM PDT           32.44           1048         -              Normal
  04/30/2026 05 PM PDT           32.43           1044         -              Normal
  04/30/2026 06 PM PDT           32.42           1041         -              Normal
  04/30/2026 07 PM PDT           32.41           1037         -              Normal
  04/30/2026 08 PM PDT           32.39           1029         -              Normal
  04/30/2026 09 PM PDT           32.38           1025         -              Normal
  04/30/2026 10 PM PDT           32.37           1021         -              Normal
  04/30/2026 11 PM PDT           32.36           1018         -              Normal
  05/01/2026 12 AM PDT           32.35           1014         -              Normal
  05/01/2026 01 AM PDT           32.34           1010         -              Normal
  05/01/2026 02 AM PDT           32.32           1003         -              Normal
  05/01/2026 03 AM PDT           32.31            999         -              Normal
  05/01/2026 04 AM PDT           32.30            995         -              Normal
  05/01/2026 05 AM PDT           32.29            991         -              Normal
  05/01/2026 06 AM PDT           32.28            987         -              Normal
  05/01/2026 07 AM PDT           32.27            983         -              Normal
  05/01/2026 08 AM PDT           32.26            980         -              Normal
  05/01/2026 09 AM PDT           32.25            976         -              Normal
  05/01/2026 10 AM PDT           32.24            972         -              Normal
  05/01/2026 11 AM PDT           32.23            968         -              Normal
  05/01/2026 12 PM PDT           32.22            964         -              Normal
  05/01/2026 01 PM PDT           32.21            961         -              Normal
  05/01/2026 02 PM PDT           32.20            957         -              Normal
  05/01/2026 03 PM PDT           32.20            957         0              Normal
  05/01/2026 04 PM PDT           32.19            953         -              Normal
  05/01/2026 05 PM PDT           32.18            949         -              Normal
  05/01/2026 06 PM PDT           32.17            946         -              Normal
  05/01/2026 07 PM PDT           32.16            942         -              Normal
  05/01/2026 08 PM PDT           32.16            942         0              Normal
  05/01/2026 09 PM PDT           32.15            938         -              Normal
  05/01/2026 10 PM PDT           32.15            938         0              Normal
  05/01/2026 11 PM PDT           32.14            934         -              Normal
  05/02/2026 12 AM PDT           32.13            931         -              Normal
  05/02/2026 01 AM PDT           32.12            927         -              Normal
  05/02/2026 02 AM PDT           32.12            927         0              Normal
  05/02/2026 03 AM PDT           32.11            923         -              Normal
  05/02/2026 04 AM PDT           32.11            923         0              Normal
  05/02/2026 05 AM PDT           32.10            919         -              Normal
  05/02/2026 06 AM PDT           32.10            919         0              Normal
  05/02/2026 07 AM PDT           32.09            916         -              Normal
  05/02/2026 08 AM PDT           32.09            916         0              Normal
  05/02/2026 09 AM PDT           32.08            912         -              Normal
  05/02/2026 10 AM PDT           32.08            912         0              Normal
  05/02/2026 11 AM PDT           32.07            908         -              Normal
  05/02/2026 12 PM PDT           32.07            908         0              Normal
  05/02/2026 01 PM PDT           32.06            905         -              Normal
  05/02/2026 02 PM PDT           32.06            905         0              Normal
  05/02/2026 03 PM PDT           32.05            901         -              Normal
  05/02/2026 04 PM PDT           32.05            901         0              Normal
  05/02/2026 05 PM PDT           32.04            897         -              Normal
  05/02/2026 06 PM PDT           32.04            897         0              Normal
  05/02/2026 07 PM PDT           32.04            897         0              Normal
  05/02/2026 08 PM PDT           32.03            893         -              Normal
  05/02/2026 09 PM PDT           32.03            893         0              Normal
  05/02/2026 10 PM PDT           32.02            890         -              Normal
  05/02/2026 11 PM PDT           32.02            890         0              Normal
  05/03/2026 12 AM PDT           32.02            890         0              Normal
  05/03/2026 01 AM PDT           32.01            886         -              Normal
  05/03/2026 02 AM PDT           32.01            886         0              Normal
  05/03/2026 03 AM PDT           32.00            883         -              Normal
  05/03/2026 04 AM PDT           32.00            883         0              Normal
  05/03/2026 05 AM PDT           32.00            883         0              Normal
  05/03/2026 06 AM PDT           31.99            879         -              Normal
  05/03/2026 07 AM PDT           31.99            879         0              Normal
  05/03/2026 08 AM PDT           31.99            879         0              Normal
  05/03/2026 09 AM PDT           31.98            875         -              Normal
  05/03/2026 10 AM PDT           31.98            875         0              Normal
  05/03/2026 11 AM PDT           31.98            875         0              Normal
  05/03/2026 12 PM PDT           31.97            872         -              Normal
  05/03/2026 01 PM PDT           31.97            872         0              Normal
  05/03/2026 02 PM PDT           31.96            868         -              Normal
  05/03/2026 03 PM PDT           31.96            868         0              Normal
  05/03/2026 04 PM PDT           31.96            868         0              Normal
  05/03/2026 05 PM PDT           31.96            868         0              Normal
  05/03/2026 06 PM PDT           31.95            864         -              Normal
  05/03/2026 07 PM PDT           31.95            864         0              Normal
  05/03/2026 08 PM PDT           31.95            864         0              Normal
  05/03/2026 09 PM PDT           31.94            861         -              Normal
  05/03/2026 10 PM PDT           31.94            861         0              Normal
  05/03/2026 11 PM PDT           31.94            861         0              Normal
  05/04/2026 12 AM PDT           31.93            857         -              Normal
  05/04/2026 01 AM PDT           31.93            857         0              Normal
  05/04/2026 02 AM PDT           31.93            857         0              Normal
  05/04/2026 03 AM PDT           31.93            857         0              Normal
  05/04/2026 04 AM PDT           31.92            853         -              Normal
  05/04/2026 05 AM PDT           31.92            853         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.