SAN JOAQUIN RIVER DELTA - ROUGH & READY ISLAND (RRIC1)
Latitude: 37.96º NLongitude: 121.36º WElevation: 15 FeetForecast Type: Unofficial Location
Location: San Joaquin County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Aug 25 2026 at 7:06 AM PDTNext Issuance: Aug 26 2026 at 9:00 AM PDT
Action/Monitor: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A

# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River Delta - Rough and Ready Island (RRIC1)
#
# File Generation Time:  08/25/2026 at 07:07 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  08/25/2026 at 04:00 AM PDT
# Maximum Observed Stage:                       7.04 Feet
#
# Earliest Date & Time of Maximum Forecast:     08/27/2026 at 05:00 AM PDT
# Maximum Forecast Stage:                       7.14 Feet
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Trend     Observed Status
# ------------------------------------------------------------------
  08/20/2026 07 AM PDT            3.50                Not Applicable
  08/20/2026 08 AM PDT            3.30         -      Not Applicable
  08/20/2026 09 AM PDT            3.56         +      Not Applicable
  08/20/2026 10 AM PDT            4.31         +      Not Applicable
  08/20/2026 11 AM PDT            4.87         +      Not Applicable
  08/20/2026 12 PM PDT            5.21         +      Not Applicable
  08/20/2026 01 PM PDT            5.45         +      Not Applicable
  08/20/2026 02 PM PDT            5.59         +      Not Applicable
  08/20/2026 03 PM PDT            5.55         -      Not Applicable
  08/20/2026 04 PM PDT            5.26         -      Not Applicable
  08/20/2026 05 PM PDT            4.92         -      Not Applicable
  08/20/2026 06 PM PDT            4.85         -      Not Applicable
  08/20/2026 07 PM PDT            5.13         +      Not Applicable
  08/20/2026 08 PM PDT            5.65         +      Not Applicable
  08/20/2026 09 PM PDT            6.11         +      Not Applicable
  08/20/2026 10 PM PDT            6.47         +      Not Applicable
  08/20/2026 11 PM PDT            6.79         +      Not Applicable
  08/21/2026 12 AM PDT            7.00         +      Not Applicable
  08/21/2026 01 AM PDT            6.92         -      Not Applicable
  08/21/2026 02 AM PDT            6.38         -      Not Applicable
  08/21/2026 03 AM PDT            5.74         -      Not Applicable
  08/21/2026 04 AM PDT            5.30         -      Not Applicable
  08/21/2026 05 AM PDT            4.82         -      Not Applicable
  08/21/2026 06 AM PDT            4.28         -      Not Applicable
  08/21/2026 07 AM PDT            3.82         -      Not Applicable
  08/21/2026 08 AM PDT            3.42         -      Not Applicable
  08/21/2026 09 AM PDT            3.14         -      Not Applicable
  08/21/2026 10 AM PDT            3.26         +      Not Applicable
  08/21/2026 11 AM PDT            4.00         +      Not Applicable
  08/21/2026 12 PM PDT            4.70         +      Not Applicable
  08/21/2026 01 PM PDT            5.11         +      Not Applicable
  08/21/2026 02 PM PDT            5.45         +      Not Applicable
  08/21/2026 03 PM PDT            5.62         +      Not Applicable
  08/21/2026 04 PM PDT            5.39         -      Not Applicable
  08/21/2026 05 PM PDT            5.58         +      Not Applicable
  08/21/2026 06 PM PDT            5.36         -      Not Applicable
  08/21/2026 07 PM PDT            5.21         -      Not Applicable
  08/21/2026 08 PM PDT            5.31         +      Not Applicable
  08/21/2026 09 PM PDT            5.70         +      Not Applicable
  08/21/2026 10 PM PDT            6.12         +      Not Applicable
  08/21/2026 11 PM PDT            6.50         +      Not Applicable
  08/22/2026 12 AM PDT            6.81         +      Not Applicable
  08/22/2026 01 AM PDT            6.96         +      Not Applicable
  08/22/2026 02 AM PDT            6.82         -      Not Applicable
  08/22/2026 03 AM PDT            6.27         -      Not Applicable
  08/22/2026 04 AM PDT            5.68         -      Not Applicable
  08/22/2026 05 AM PDT            5.26         -      Not Applicable
  08/22/2026 06 AM PDT            4.30         -      Not Applicable
  08/22/2026 07 AM PDT            3.48         -      Not Applicable
  08/22/2026 08 AM PDT            2.94         -      Not Applicable
  08/22/2026 09 AM PDT            2.82         -      Not Applicable
  08/22/2026 10 AM PDT            2.96         +      Not Applicable
  08/22/2026 11 AM PDT            3.12         +      Not Applicable
  08/22/2026 12 PM PDT            3.96         +      Not Applicable
  08/22/2026 01 PM PDT            4.70         +      Not Applicable
  08/22/2026 02 PM PDT            5.12         +      Not Applicable
  08/22/2026 03 PM PDT            5.46         +      Not Applicable
  08/22/2026 04 PM PDT            5.72         +      Not Applicable
  08/22/2026 05 PM PDT            5.84         +      Not Applicable
  08/22/2026 06 PM PDT            5.69         -      Not Applicable
  08/22/2026 07 PM PDT            5.33         -      Not Applicable
  08/22/2026 08 PM PDT            5.02         -      Not Applicable
  08/22/2026 09 PM PDT            5.00         -      Not Applicable
  08/22/2026 10 PM PDT            5.39         +      Not Applicable
  08/22/2026 11 PM PDT            5.94         +      Not Applicable
  08/23/2026 12 AM PDT            6.37         +      Not Applicable
  08/23/2026 01 AM PDT            6.70         +      Not Applicable
  08/23/2026 02 AM PDT            6.91         +      Not Applicable
  08/23/2026 03 AM PDT            6.79         -      Not Applicable
  08/23/2026 04 AM PDT            6.18         -      Not Applicable
  08/23/2026 05 AM PDT            5.54         -      Not Applicable
  08/23/2026 06 AM PDT            5.11         -      Not Applicable
  08/23/2026 07 AM PDT            4.59         -      Not Applicable
  08/23/2026 08 AM PDT            4.05         -      Not Applicable
  08/23/2026 09 AM PDT            3.53         -      Not Applicable
  08/23/2026 10 AM PDT            3.19         -      Not Applicable
  08/23/2026 11 AM PDT            2.88         -      Not Applicable
  08/23/2026 12 PM PDT            3.21         +      Not Applicable
  08/23/2026 01 PM PDT            4.14         +      Not Applicable
  08/23/2026 02 PM PDT            4.80         +      Not Applicable
  08/23/2026 03 PM PDT            5.19         +      Not Applicable
  08/23/2026 04 PM PDT            5.53         +      Not Applicable
  08/23/2026 05 PM PDT            5.75         +      Not Applicable
  08/23/2026 06 PM PDT            5.77         +      Not Applicable
  08/23/2026 07 PM PDT            5.45         -      Not Applicable
  08/23/2026 08 PM PDT            4.96         -      Not Applicable
  08/23/2026 09 PM PDT            4.70         -      Not Applicable
  08/23/2026 10 PM PDT            4.87         +      Not Applicable
  08/23/2026 11 PM PDT            5.46         +      Not Applicable
  08/24/2026 12 AM PDT            6.05         +      Not Applicable
  08/24/2026 01 AM PDT            6.46         +      Not Applicable
  08/24/2026 02 AM PDT            6.81         +      Not Applicable
  08/24/2026 03 AM PDT            7.02         +      Not Applicable
  08/24/2026 04 AM PDT            6.89         -      Not Applicable
  08/24/2026 05 AM PDT            6.27         -      Not Applicable
  08/24/2026 06 AM PDT            5.62         -      Not Applicable
  08/24/2026 07 AM PDT            5.21         -      Not Applicable
  08/24/2026 08 AM PDT            4.72         -      Not Applicable
  08/24/2026 09 AM PDT            4.19         -      Not Applicable
  08/24/2026 10 AM PDT            3.69         -      Not Applicable
  08/24/2026 11 AM PDT            3.26         -      Not Applicable
  08/24/2026 12 PM PDT            3.08         -      Not Applicable
  08/24/2026 01 PM PDT            3.65         +      Not Applicable
  08/24/2026 02 PM PDT            4.66         +      Not Applicable
  08/24/2026 03 PM PDT            5.17         +      Not Applicable
  08/24/2026 04 PM PDT            5.54         +      Not Applicable
  08/24/2026 05 PM PDT            5.85         +      Not Applicable
  08/24/2026 06 PM PDT            6.01         +      Not Applicable
  08/24/2026 07 PM PDT            5.82         -      Not Applicable
  08/24/2026 08 PM PDT            5.27         -      Not Applicable
  08/24/2026 09 PM PDT            4.76         -      Not Applicable
  08/24/2026 10 PM PDT            4.66         -      Not Applicable
  08/24/2026 11 PM PDT            4.93         +      Not Applicable
  08/25/2026 12 AM PDT            5.56         +      Not Applicable
  08/25/2026 01 AM PDT            6.14         +      Not Applicable
  08/25/2026 02 AM PDT            6.56         +      Not Applicable
  08/25/2026 03 AM PDT            6.89         +      Not Applicable
  08/25/2026 04 AM PDT            7.04         +      Not Applicable
  08/25/2026 05 AM PDT            6.84         -      Not Applicable
  08/25/2026 06 AM PDT            6.34         -      Not Applicable
  08/25/2026 07 AM PDT            5.61         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Trend     Forecast Status
# ------------------------------------------------------------------
  08/25/2026 08 AM PDT            4.78                Not Applicable
  08/25/2026 09 AM PDT            3.96         -      Not Applicable
  08/25/2026 10 AM PDT            3.25         -      Not Applicable
  08/25/2026 11 AM PDT            2.66         -      Not Applicable
  08/25/2026 12 PM PDT            2.49         -      Not Applicable
  08/25/2026 01 PM PDT            2.77         +      Not Applicable
  08/25/2026 02 PM PDT            3.50         +      Not Applicable
  08/25/2026 03 PM PDT            4.36         +      Not Applicable
  08/25/2026 04 PM PDT            5.16         +      Not Applicable
  08/25/2026 05 PM PDT            5.73         +      Not Applicable
  08/25/2026 06 PM PDT            5.92         +      Not Applicable
  08/25/2026 07 PM PDT            5.70         -      Not Applicable
  08/25/2026 08 PM PDT            5.22         -      Not Applicable
  08/25/2026 09 PM PDT            4.78         -      Not Applicable
  08/25/2026 10 PM PDT            4.61         -      Not Applicable
  08/25/2026 11 PM PDT            4.79         +      Not Applicable
  08/26/2026 12 AM PDT            5.25         +      Not Applicable
  08/26/2026 01 AM PDT            5.87         +      Not Applicable
  08/26/2026 02 AM PDT            6.47         +      Not Applicable
  08/26/2026 03 AM PDT            6.91         +      Not Applicable
  08/26/2026 04 AM PDT            7.07         +      Not Applicable
  08/26/2026 05 AM PDT            6.93         -      Not Applicable
  08/26/2026 06 AM PDT            6.54         -      Not Applicable
  08/26/2026 07 AM PDT            5.93         -      Not Applicable
  08/26/2026 08 AM PDT            5.20         -      Not Applicable
  08/26/2026 09 AM PDT            4.45         -      Not Applicable
  08/26/2026 10 AM PDT            3.72         -      Not Applicable
  08/26/2026 11 AM PDT            3.12         -      Not Applicable
  08/26/2026 12 PM PDT            2.65         -      Not Applicable
  08/26/2026 01 PM PDT            2.54         -      Not Applicable
  08/26/2026 02 PM PDT            2.84         +      Not Applicable
  08/26/2026 03 PM PDT            3.56         +      Not Applicable
  08/26/2026 04 PM PDT            4.44         +      Not Applicable
  08/26/2026 05 PM PDT            5.23         +      Not Applicable
  08/26/2026 06 PM PDT            5.80         +      Not Applicable
  08/26/2026 07 PM PDT            5.98         +      Not Applicable
  08/26/2026 08 PM PDT            5.71         -      Not Applicable
  08/26/2026 09 PM PDT            5.15         -      Not Applicable
  08/26/2026 10 PM PDT            4.63         -      Not Applicable
  08/26/2026 11 PM PDT            4.42         -      Not Applicable
  08/27/2026 12 AM PDT            4.62         +      Not Applicable
  08/27/2026 01 AM PDT            5.13         +      Not Applicable
  08/27/2026 02 AM PDT            5.81         +      Not Applicable
  08/27/2026 03 AM PDT            6.49         +      Not Applicable
  08/27/2026 04 AM PDT            6.97         +      Not Applicable
  08/27/2026 05 AM PDT            7.14         +      Not Applicable
  08/27/2026 06 AM PDT            6.96         -      Not Applicable
  08/27/2026 07 AM PDT            6.47         -      Not Applicable
  08/27/2026 08 AM PDT            5.74         -      Not Applicable
  08/27/2026 09 AM PDT            4.92         -      Not Applicable
  08/27/2026 10 AM PDT            4.10         -      Not Applicable
  08/27/2026 11 AM PDT            3.40         -      Not Applicable
  08/27/2026 12 PM PDT            2.83         -      Not Applicable
  08/27/2026 01 PM PDT            2.66         -      Not Applicable
  08/27/2026 02 PM PDT            2.95         +      Not Applicable
  08/27/2026 03 PM PDT            3.66         +      Not Applicable
  08/27/2026 04 PM PDT            4.55         +      Not Applicable
  08/27/2026 05 PM PDT            5.33         +      Not Applicable
  08/27/2026 06 PM PDT            5.90         +      Not Applicable
  08/27/2026 07 PM PDT            6.11         +      Not Applicable
  08/27/2026 08 PM PDT            5.91         -      Not Applicable
  08/27/2026 09 PM PDT            5.42         -      Not Applicable
  08/27/2026 10 PM PDT            4.83         -      Not Applicable
  08/27/2026 11 PM PDT            4.37         -      Not Applicable
  08/28/2026 12 AM PDT            4.19         -      Not Applicable
  08/28/2026 01 AM PDT            4.41         +      Not Applicable
  08/28/2026 02 AM PDT            4.91         +      Not Applicable
  08/28/2026 03 AM PDT            5.57         +      Not Applicable
  08/28/2026 04 AM PDT            6.22         +      Not Applicable
  08/28/2026 05 AM PDT            6.68         +      Not Applicable
  08/28/2026 06 AM PDT            6.83         +      Not Applicable
  08/28/2026 07 AM PDT            6.60         -      Not Applicable
  08/28/2026 08 AM PDT            6.01         -      Not Applicable
  08/28/2026 09 AM PDT            5.20         -      Not Applicable
  08/28/2026 10 AM PDT            4.34         -      Not Applicable
  08/28/2026 11 AM PDT            3.54         -      Not Applicable
  08/28/2026 12 PM PDT            2.92         -      Not Applicable
  08/28/2026 01 PM PDT            2.67         -      Not Applicable
  08/28/2026 02 PM PDT            2.93         +      Not Applicable
  08/28/2026 03 PM PDT            3.60         +      Not Applicable
  08/28/2026 04 PM PDT            4.43         +      Not Applicable
  08/28/2026 05 PM PDT            5.18         +      Not Applicable
  08/28/2026 06 PM PDT            5.73         +      Not Applicable
  08/28/2026 07 PM PDT            5.93         +      Not Applicable
  08/28/2026 08 PM PDT            5.78         -      Not Applicable
  08/28/2026 09 PM PDT            5.36         -      Not Applicable
  08/28/2026 10 PM PDT            4.79         -      Not Applicable
  08/28/2026 11 PM PDT            4.23         -      Not Applicable
  08/29/2026 12 AM PDT            3.81         -      Not Applicable
  08/29/2026 01 AM PDT            3.67         -      Not Applicable
  08/29/2026 02 AM PDT            3.88         +      Not Applicable
  08/29/2026 03 AM PDT            4.42         +      Not Applicable
  08/29/2026 04 AM PDT            5.08         +      Not Applicable
  08/29/2026 05 AM PDT            5.72         +      Not Applicable
  08/29/2026 06 AM PDT            6.19         +      Not Applicable
  08/29/2026 07 AM PDT            6.34         +      Not Applicable
  08/29/2026 08 AM PDT            6.12         -      Not Applicable
  08/29/2026 09 AM PDT            5.58         -      Not Applicable
  08/29/2026 10 AM PDT            4.84         -      Not Applicable
  08/29/2026 11 AM PDT            4.02         -      Not Applicable
  08/29/2026 12 PM PDT            3.30         -      Not Applicable
  08/29/2026 01 PM PDT            2.66         -      Not Applicable
  08/29/2026 02 PM PDT            2.46         -      Not Applicable
  08/29/2026 03 PM PDT            2.72         +      Not Applicable
  08/29/2026 04 PM PDT            3.44         +      Not Applicable
  08/29/2026 05 PM PDT            4.28         +      Not Applicable
  08/29/2026 06 PM PDT            5.07         +      Not Applicable
  08/29/2026 07 PM PDT            5.62         +      Not Applicable
  08/29/2026 08 PM PDT            5.82         +      Not Applicable
  08/29/2026 09 PM PDT            5.63         -      Not Applicable
  08/29/2026 10 PM PDT            5.14         -      Not Applicable
  08/29/2026 11 PM PDT            4.51         -      Not Applicable
  08/30/2026 12 AM PDT            3.85         -      Not Applicable
  08/30/2026 01 AM PDT            3.39         -      Not Applicable
  08/30/2026 02 AM PDT            3.18         -      Not Applicable
  08/30/2026 03 AM PDT            3.37         +      Not Applicable
  08/30/2026 04 AM PDT            3.90         +      Not Applicable
  08/30/2026 05 AM PDT            4.61         +      Not Applicable
#
# NOTE 1: Stages are rounded to the nearest hundredth (.01) of a foot.
# NOTE 2: Trends are determined using hourly change in unrounded stage.
# NOTE 3: Maximum Values are determined using unrounded stage.