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: Jun 26 2026 at 7:50 AM PDTNext Issuance: Jun 27 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:  06/26/2026 at 07:50 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  06/21/2026 at 05:00 PM PDT
# Maximum Observed Stage:                       30.87 Feet
# Maximum Observed Flow:                        523 cfs
#
# Earliest Date & Time of Maximum Forecast:     06/26/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       30.25 Feet
# Maximum Forecast Flow:                        364 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  06/21/2026 07 AM PDT           30.67            469                        Normal
  06/21/2026 08 AM PDT           30.72            482         +              Normal
  06/21/2026 09 AM PDT           30.77            495         +              Normal
  06/21/2026 10 AM PDT           30.77            495         0              Normal
  06/21/2026 11 AM PDT           30.82            509         +              Normal
  06/21/2026 12 PM PDT           30.81            506         -              Normal
  06/21/2026 01 PM PDT           30.83            512         +              Normal
  06/21/2026 02 PM PDT           30.86            520         +              Normal
  06/21/2026 03 PM PDT           30.84            514         -              Normal
  06/21/2026 04 PM PDT           30.86            520         +              Normal
  06/21/2026 05 PM PDT           30.87            523         +              Normal
  06/21/2026 06 PM PDT           30.82            509         -              Normal
  06/21/2026 07 PM PDT           30.81            506         -              Normal
  06/21/2026 08 PM PDT           30.82            509         +              Normal
  06/21/2026 09 PM PDT           30.77            495         -              Normal
  06/21/2026 10 PM PDT           30.77            495         0              Normal
  06/21/2026 11 PM PDT           30.78            498         +              Normal
  06/22/2026 12 AM PDT           30.75            490         -              Normal
  06/22/2026 01 AM PDT           30.74            487         -              Normal
  06/22/2026 02 AM PDT           30.74            487         0              Normal
  06/22/2026 03 AM PDT           30.73            485         -              Normal
  06/22/2026 04 AM PDT           30.72            482         -              Normal
  06/22/2026 05 AM PDT           30.72            482         0              Normal
  06/22/2026 06 AM PDT           30.70            477         -              Normal
  06/22/2026 07 AM PDT           30.69            474         -              Normal
  06/22/2026 08 AM PDT           30.68            472         -              Normal
  06/22/2026 09 AM PDT           30.67            469         -              Normal
  06/22/2026 10 AM PDT           30.66            466         -              Normal
  06/22/2026 11 AM PDT           30.68            472         +              Normal
  06/22/2026 12 PM PDT           30.71            479         +              Normal
  06/22/2026 01 PM PDT           30.70            477         -              Normal
  06/22/2026 02 PM PDT           30.69            474         -              Normal
  06/22/2026 03 PM PDT           30.68            472         -              Normal
  06/22/2026 04 PM PDT           30.68            472         0              Normal
  06/22/2026 05 PM PDT           30.65            464         -              Normal
  06/22/2026 06 PM PDT           30.63            458         -              Normal
  06/22/2026 07 PM PDT           30.62            456         -              Normal
  06/22/2026 08 PM PDT           30.58            445         -              Normal
  06/22/2026 09 PM PDT           30.55            438         -              Normal
  06/22/2026 10 PM PDT           30.53            433         -              Normal
  06/22/2026 11 PM PDT           30.50            425         -              Normal
  06/23/2026 12 AM PDT           30.47            417         -              Normal
  06/23/2026 01 AM PDT           30.46            415         -              Normal
  06/23/2026 02 AM PDT           30.44            410         -              Normal
  06/23/2026 03 AM PDT           30.41            402         -              Normal
  06/23/2026 04 AM PDT           30.40            400         -              Normal
  06/23/2026 05 AM PDT           30.34            385         -              Normal
  06/23/2026 06 AM PDT           30.31            378         -              Normal
  06/23/2026 07 AM PDT           30.29            373         -              Normal
  06/23/2026 08 AM PDT           30.29            373         0              Normal
  06/23/2026 09 AM PDT           30.31            378         +              Normal
  06/23/2026 10 AM PDT           30.38            395         +              Normal
  06/23/2026 11 AM PDT           30.34            385         -              Normal
  06/23/2026 12 PM PDT           30.32            380         -              Normal
  06/23/2026 01 PM PDT           30.34            385         +              Normal
  06/23/2026 02 PM PDT           30.31            378         -              Normal
  06/23/2026 03 PM PDT           30.29            373         -              Normal
  06/23/2026 04 PM PDT           30.30            376         +              Normal
  06/23/2026 05 PM PDT           30.32            380         +              Normal
  06/23/2026 06 PM PDT           30.31            378         -              Normal
  06/23/2026 07 PM PDT           30.32            380         +              Normal
  06/23/2026 08 PM PDT           30.31            378         -              Normal
  06/23/2026 09 PM PDT           30.30            376         -              Normal
  06/23/2026 10 PM PDT           30.29            373         -              Normal
  06/23/2026 11 PM PDT           30.27            368         -              Normal
  06/24/2026 12 AM PDT           30.27            368         0              Normal
  06/24/2026 01 AM PDT           30.27            368         0              Normal
  06/24/2026 02 AM PDT           30.26            366         -              Normal
  06/24/2026 03 AM PDT           30.26            366         0              Normal
  06/24/2026 04 AM PDT           30.27            368         +              Normal
  06/24/2026 05 AM PDT           30.24            361         -              Normal
  06/24/2026 06 AM PDT           30.22            356         -              Normal
  06/24/2026 07 AM PDT           30.22            356         0              Normal
  06/24/2026 08 AM PDT           30.24            361         +              Normal
  06/24/2026 09 AM PDT           30.19            349         -              Normal
  06/24/2026 10 AM PDT           30.16            342         -              Normal
  06/24/2026 11 AM PDT           30.22            356         +              Normal
  06/24/2026 12 PM PDT           30.24            361         +              Normal
  06/24/2026 01 PM PDT           30.21            354         -              Normal
  06/24/2026 02 PM PDT           30.23            359         +              Normal
  06/24/2026 03 PM PDT           30.27            368         +              Normal
  06/24/2026 04 PM PDT           30.29            373         +              Normal
  06/24/2026 05 PM PDT           30.35            388         +              Normal
  06/24/2026 06 PM PDT           30.39            398         +              Normal
  06/24/2026 07 PM PDT           30.39            398         0              Normal
  06/24/2026 08 PM PDT           30.42            405         +              Normal
  06/24/2026 09 PM PDT           30.42            405         0              Normal
  06/24/2026 10 PM PDT           30.41            402         -              Normal
  06/24/2026 11 PM PDT           30.40            400         -              Normal
  06/25/2026 12 AM PDT           30.39            398         -              Normal
  06/25/2026 01 AM PDT           30.37            393         -              Normal
  06/25/2026 02 AM PDT           30.35            388         -              Normal
  06/25/2026 03 AM PDT           30.33            383         -              Normal
  06/25/2026 04 AM PDT           30.30            376         -              Normal
  06/25/2026 05 AM PDT           30.28            371         -              Normal
  06/25/2026 06 AM PDT           30.27            368         -              Normal
  06/25/2026 07 AM PDT           30.27            368         0              Normal
  06/25/2026 08 AM PDT           30.25            364         -              Normal
  06/25/2026 09 AM PDT           30.24            361         -              Normal
  06/25/2026 10 AM PDT           30.23            359         -              Normal
  06/25/2026 11 AM PDT           30.21            354         -              Normal
  06/25/2026 12 PM PDT           30.19            349         -              Normal
  06/25/2026 01 PM PDT           30.20            352         +              Normal
  06/25/2026 02 PM PDT           30.21            354         +              Normal
  06/25/2026 03 PM PDT           30.23            359         +              Normal
  06/25/2026 04 PM PDT           30.26            366         +              Normal
  06/25/2026 05 PM PDT           30.27            368         +              Normal
  06/25/2026 06 PM PDT           30.28            371         +              Normal
  06/25/2026 07 PM PDT           30.30            376         +              Normal
  06/25/2026 08 PM PDT           30.31            378         +              Normal
  06/25/2026 09 PM PDT           30.33            383         +              Normal
  06/25/2026 10 PM PDT           30.35            388         +              Normal
  06/25/2026 11 PM PDT           30.32            380         -              Normal
  06/26/2026 12 AM PDT           30.33            383         +              Normal
  06/26/2026 01 AM PDT           30.33            383         0              Normal
  06/26/2026 02 AM PDT           30.30            376         -              Normal
  06/26/2026 03 AM PDT           30.30            376         0              Normal
  06/26/2026 04 AM PDT           30.29            373         -              Normal
  06/26/2026 05 AM PDT           30.27            368         -              Normal
  06/26/2026 06 AM PDT           30.25            364         -              Normal
  06/26/2026 07 AM PDT           30.25            364         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  06/26/2026 08 AM PDT           30.25            364                        Normal
  06/26/2026 09 AM PDT           30.24            361         -              Normal
  06/26/2026 10 AM PDT           30.24            361         0              Normal
  06/26/2026 11 AM PDT           30.24            361         0              Normal
  06/26/2026 12 PM PDT           30.24            361         0              Normal
  06/26/2026 01 PM PDT           30.23            359         -              Normal
  06/26/2026 02 PM PDT           30.23            359         0              Normal
  06/26/2026 03 PM PDT           30.23            359         0              Normal
  06/26/2026 04 PM PDT           30.22            356         -              Normal
  06/26/2026 05 PM PDT           30.22            356         0              Normal
  06/26/2026 06 PM PDT           30.22            356         0              Normal
  06/26/2026 07 PM PDT           30.22            356         0              Normal
  06/26/2026 08 PM PDT           30.21            354         -              Normal
  06/26/2026 09 PM PDT           30.21            354         0              Normal
  06/26/2026 10 PM PDT           30.21            354         0              Normal
  06/26/2026 11 PM PDT           30.21            354         0              Normal
  06/27/2026 12 AM PDT           30.20            352         -              Normal
  06/27/2026 01 AM PDT           30.20            352         0              Normal
  06/27/2026 02 AM PDT           30.20            352         0              Normal
  06/27/2026 03 AM PDT           30.20            352         0              Normal
  06/27/2026 04 AM PDT           30.20            352         0              Normal
  06/27/2026 05 AM PDT           30.20            352         0              Normal
  06/27/2026 06 AM PDT           30.19            349         -              Normal
  06/27/2026 07 AM PDT           30.19            349         0              Normal
  06/27/2026 08 AM PDT           30.19            349         0              Normal
  06/27/2026 09 AM PDT           30.19            349         0              Normal
  06/27/2026 10 AM PDT           30.19            349         0              Normal
  06/27/2026 11 AM PDT           30.18            347         -              Normal
  06/27/2026 12 PM PDT           30.18            347         0              Normal
  06/27/2026 01 PM PDT           30.18            347         0              Normal
  06/27/2026 02 PM PDT           30.18            347         0              Normal
  06/27/2026 03 PM PDT           30.18            347         0              Normal
  06/27/2026 04 PM PDT           30.18            347         0              Normal
  06/27/2026 05 PM PDT           30.17            345         -              Normal
  06/27/2026 06 PM PDT           30.17            345         0              Normal
  06/27/2026 07 PM PDT           30.17            345         0              Normal
  06/27/2026 08 PM PDT           30.17            345         0              Normal
  06/27/2026 09 PM PDT           30.17            345         0              Normal
  06/27/2026 10 PM PDT           30.17            345         0              Normal
  06/27/2026 11 PM PDT           30.17            345         0              Normal
  06/28/2026 12 AM PDT           30.17            345         0              Normal
  06/28/2026 01 AM PDT           30.16            342         -              Normal
  06/28/2026 02 AM PDT           30.16            342         0              Normal
  06/28/2026 03 AM PDT           30.16            342         0              Normal
  06/28/2026 04 AM PDT           30.16            342         0              Normal
  06/28/2026 05 AM PDT           30.16            342         0              Normal
  06/28/2026 06 AM PDT           30.16            342         0              Normal
  06/28/2026 07 AM PDT           30.16            342         0              Normal
  06/28/2026 08 AM PDT           30.16            342         0              Normal
  06/28/2026 09 AM PDT           30.16            342         0              Normal
  06/28/2026 10 AM PDT           30.16            342         0              Normal
  06/28/2026 11 AM PDT           30.16            342         0              Normal
  06/28/2026 12 PM PDT           30.15            340         -              Normal
  06/28/2026 01 PM PDT           30.15            340         0              Normal
  06/28/2026 02 PM PDT           30.15            340         0              Normal
  06/28/2026 03 PM PDT           30.15            340         0              Normal
  06/28/2026 04 PM PDT           30.15            340         0              Normal
  06/28/2026 05 PM PDT           30.15            340         0              Normal
  06/28/2026 06 PM PDT           30.15            340         0              Normal
  06/28/2026 07 PM PDT           30.15            340         0              Normal
  06/28/2026 08 PM PDT           30.14            338         -              Normal
  06/28/2026 09 PM PDT           30.14            338         0              Normal
  06/28/2026 10 PM PDT           30.14            338         0              Normal
  06/28/2026 11 PM PDT           30.14            338         0              Normal
  06/29/2026 12 AM PDT           30.14            338         0              Normal
  06/29/2026 01 AM PDT           30.14            338         0              Normal
  06/29/2026 02 AM PDT           30.14            338         0              Normal
  06/29/2026 03 AM PDT           30.13            337         -              Normal
  06/29/2026 04 AM PDT           30.13            337         0              Normal
  06/29/2026 05 AM PDT           30.13            337         0              Normal
  06/29/2026 06 AM PDT           30.13            337         0              Normal
  06/29/2026 07 AM PDT           30.13            337         0              Normal
  06/29/2026 08 AM PDT           30.13            337         0              Normal
  06/29/2026 09 AM PDT           30.12            335         -              Normal
  06/29/2026 10 AM PDT           30.12            335         0              Normal
  06/29/2026 11 AM PDT           30.12            335         0              Normal
  06/29/2026 12 PM PDT           30.12            335         0              Normal
  06/29/2026 01 PM PDT           30.12            335         0              Normal
  06/29/2026 02 PM PDT           30.12            335         0              Normal
  06/29/2026 03 PM PDT           30.12            335         0              Normal
  06/29/2026 04 PM PDT           30.12            335         0              Normal
  06/29/2026 05 PM PDT           30.12            335         0              Normal
  06/29/2026 06 PM PDT           30.12            335         0              Normal
  06/29/2026 07 PM PDT           30.12            335         0              Normal
  06/29/2026 08 PM PDT           30.11            333         -              Normal
  06/29/2026 09 PM PDT           30.11            333         0              Normal
  06/29/2026 10 PM PDT           30.11            333         0              Normal
  06/29/2026 11 PM PDT           30.11            333         0              Normal
  06/30/2026 12 AM PDT           30.11            333         0              Normal
  06/30/2026 01 AM PDT           30.11            333         0              Normal
  06/30/2026 02 AM PDT           30.11            333         0              Normal
  06/30/2026 03 AM PDT           30.11            333         0              Normal
  06/30/2026 04 AM PDT           30.11            333         0              Normal
  06/30/2026 05 AM PDT           30.11            333         0              Normal
  06/30/2026 06 AM PDT           30.10            332         -              Normal
  06/30/2026 07 AM PDT           30.10            332         0              Normal
  06/30/2026 08 AM PDT           30.10            332         0              Normal
  06/30/2026 09 AM PDT           30.10            332         0              Normal
  06/30/2026 10 AM PDT           30.10            332         0              Normal
  06/30/2026 11 AM PDT           30.10            332         0              Normal
  06/30/2026 12 PM PDT           30.10            332         0              Normal
  06/30/2026 01 PM PDT           30.10            332         0              Normal
  06/30/2026 02 PM PDT           30.10            332         0              Normal
  06/30/2026 03 PM PDT           30.10            332         0              Normal
  06/30/2026 04 PM PDT           30.09            330         -              Normal
  06/30/2026 05 PM PDT           30.09            330         0              Normal
  06/30/2026 06 PM PDT           30.09            330         0              Normal
  06/30/2026 07 PM PDT           30.09            330         0              Normal
  06/30/2026 08 PM PDT           30.09            330         0              Normal
  06/30/2026 09 PM PDT           30.09            330         0              Normal
  06/30/2026 10 PM PDT           30.09            330         0              Normal
  06/30/2026 11 PM PDT           30.09            330         0              Normal
  07/01/2026 12 AM PDT           30.09            330         0              Normal
  07/01/2026 01 AM PDT           30.09            330         0              Normal
  07/01/2026 02 AM PDT           30.09            330         0              Normal
  07/01/2026 03 AM PDT           30.09            330         0              Normal
  07/01/2026 04 AM PDT           30.09            330         0              Normal
  07/01/2026 05 AM PDT           30.09            330         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.