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: Oct 18 2026 at 7:17 AM PDTNext Issuance: Oct 19 2026 at 9:00 AM PDT
Action: 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:  10/18/2026 at 07:18 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/14/2026 at 08:00 PM PDT
# Maximum Observed Stage:                       6.98 Feet
#
# Earliest Date & Time of Maximum Forecast:     10/18/2026 at 11:00 PM PDT
# Maximum Forecast Stage:                       7.02 Feet
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Trend     Observed Status
# ------------------------------------------------------------------
  10/13/2026 07 AM PDT            5.75                Not Applicable
  10/13/2026 08 AM PDT            5.99         +      Not Applicable
  10/13/2026 09 AM PDT            6.16         +      Not Applicable
  10/13/2026 10 AM PDT            5.94         -      Not Applicable
  10/13/2026 11 AM PDT            5.28         -      Not Applicable
  10/13/2026 12 PM PDT            4.79         -      Not Applicable
  10/13/2026 01 PM PDT            4.54         -      Not Applicable
  10/13/2026 02 PM PDT            4.46         -      Not Applicable
  10/13/2026 03 PM PDT            4.88         +      Not Applicable
  10/13/2026 04 PM PDT            5.64         +      Not Applicable
  10/13/2026 05 PM PDT            6.20         +      Not Applicable
  10/13/2026 06 PM PDT            6.58         +      Not Applicable
  10/13/2026 07 PM PDT            6.89         +      Not Applicable
  10/13/2026 08 PM PDT            6.95         +      Not Applicable
  10/13/2026 09 PM PDT            6.52         -      Not Applicable
  10/13/2026 10 PM PDT            5.77         -      Not Applicable
  10/13/2026 11 PM PDT            5.25         -      Not Applicable
  10/14/2026 12 AM PDT            4.81         -      Not Applicable
  10/14/2026 01 AM PDT            4.29         -      Not Applicable
  10/14/2026 02 AM PDT            3.78         -      Not Applicable
  10/14/2026 03 AM PDT            3.33         -      Not Applicable
  10/14/2026 04 AM PDT            3.10         -      Not Applicable
  10/14/2026 05 AM PDT            3.62         +      Not Applicable
  10/14/2026 06 AM PDT            4.60         +      Not Applicable
  10/14/2026 07 AM PDT            5.14         +      Not Applicable
  10/14/2026 08 AM PDT            5.50         +      Not Applicable
  10/14/2026 09 AM PDT            5.75         +      Not Applicable
  10/14/2026 10 AM PDT            5.85         +      Not Applicable
  10/14/2026 11 AM PDT            5.65         -      Not Applicable
  10/14/2026 12 PM PDT            5.08         -      Not Applicable
  10/14/2026 01 PM PDT            4.65         -      Not Applicable
  10/14/2026 02 PM PDT            4.52         -      Not Applicable
  10/14/2026 03 PM PDT            4.71         +      Not Applicable
  10/14/2026 04 PM PDT            5.37         +      Not Applicable
  10/14/2026 05 PM PDT            5.97         +      Not Applicable
  10/14/2026 06 PM PDT            6.38         +      Not Applicable
  10/14/2026 07 PM PDT            6.74         +      Not Applicable
  10/14/2026 08 PM PDT            6.98         +      Not Applicable
  10/14/2026 09 PM PDT            6.82         -      Not Applicable
  10/14/2026 10 PM PDT            6.14         -      Not Applicable
  10/14/2026 11 PM PDT            5.45         -      Not Applicable
  10/15/2026 12 AM PDT            5.03         -      Not Applicable
  10/15/2026 01 AM PDT            4.57         -      Not Applicable
  10/15/2026 02 AM PDT            4.07         -      Not Applicable
  10/15/2026 03 AM PDT            3.59         -      Not Applicable
  10/15/2026 04 AM PDT            3.16         -      Not Applicable
  10/15/2026 05 AM PDT            3.06         -      Not Applicable
  10/15/2026 06 AM PDT            3.77         +      Not Applicable
  10/15/2026 07 AM PDT            4.65         +      Not Applicable
  10/15/2026 08 AM PDT            5.10         +      Not Applicable
  10/15/2026 09 AM PDT            5.44         +      Not Applicable
  10/15/2026 10 AM PDT            5.71         +      Not Applicable
  10/15/2026 11 AM PDT            5.82         +      Not Applicable
  10/15/2026 12 PM PDT            5.63         -      Not Applicable
  10/15/2026 01 PM PDT            5.14         -      Not Applicable
  10/15/2026 02 PM PDT            4.79         -      Not Applicable
  10/15/2026 03 PM PDT            4.77         -      Not Applicable
  10/15/2026 04 PM PDT            5.09         +      Not Applicable
  10/15/2026 05 PM PDT            5.67         +      Not Applicable
  10/15/2026 06 PM PDT            6.13         +      Not Applicable
  10/15/2026 07 PM PDT            6.49         +      Not Applicable
  10/15/2026 08 PM PDT            6.80         +      Not Applicable
  10/15/2026 09 PM PDT            6.87         +      Not Applicable
  10/15/2026 10 PM PDT            6.49         -      Not Applicable
  10/15/2026 11 PM PDT            5.77         -      Not Applicable
  10/16/2026 12 AM PDT            5.24         -      Not Applicable
  10/16/2026 01 AM PDT            4.82         -      Not Applicable
  10/16/2026 02 AM PDT            4.27         -      Not Applicable
  10/16/2026 03 AM PDT            3.83         -      Not Applicable
  10/16/2026 04 AM PDT            3.38         -      Not Applicable
  10/16/2026 05 AM PDT            3.06         -      Not Applicable
  10/16/2026 06 AM PDT            3.13         +      Not Applicable
  10/16/2026 07 AM PDT            3.89         +      Not Applicable
  10/16/2026 08 AM PDT            4.62         +      Not Applicable
  10/16/2026 09 AM PDT            5.06         +      Not Applicable
  10/16/2026 10 AM PDT            5.43         +      Not Applicable
  10/16/2026 11 AM PDT            5.69         +      Not Applicable
  10/16/2026 12 PM PDT            5.84         +      Not Applicable
  10/16/2026 01 PM PDT            5.80         -      Not Applicable
  10/16/2026 02 PM PDT            5.52         -      Not Applicable
  10/16/2026 03 PM PDT            5.26         -      Not Applicable
  10/16/2026 04 PM PDT            5.29         +      Not Applicable
  10/16/2026 05 PM PDT            5.61         +      Not Applicable
  10/16/2026 06 PM PDT            6.05         +      Not Applicable
  10/16/2026 07 PM PDT            6.41         +      Not Applicable
  10/16/2026 08 PM PDT            6.69         +      Not Applicable
  10/16/2026 09 PM PDT            6.91         +      Not Applicable
  10/16/2026 10 PM PDT            6.81         -      Not Applicable
  10/16/2026 11 PM PDT            6.27         -      Not Applicable
  10/17/2026 12 AM PDT            5.66         -      Not Applicable
  10/17/2026 01 AM PDT            5.20         -      Not Applicable
  10/17/2026 02 AM PDT            4.73         -      Not Applicable
  10/17/2026 03 AM PDT            4.23         -      Not Applicable
  10/17/2026 04 AM PDT            3.74         -      Not Applicable
  10/17/2026 05 AM PDT            3.30         -      Not Applicable
  10/17/2026 06 AM PDT            3.03         -      Not Applicable
  10/17/2026 07 AM PDT            3.16         +      Not Applicable
  10/17/2026 08 AM PDT            3.96         +      Not Applicable
  10/17/2026 09 AM PDT            4.66         +      Not Applicable
  10/17/2026 10 AM PDT            5.08         +      Not Applicable
  10/17/2026 11 AM PDT            5.48         +      Not Applicable
  10/17/2026 12 PM PDT            5.73         +      Not Applicable
  10/17/2026 01 PM PDT            5.87         +      Not Applicable
  10/17/2026 02 PM PDT            5.85         -      Not Applicable
  10/17/2026 03 PM PDT            5.63         -      Not Applicable
  10/17/2026 04 PM PDT            5.40         -      Not Applicable
  10/17/2026 05 PM PDT            5.39         -      Not Applicable
  10/17/2026 06 PM PDT            5.60         +      Not Applicable
  10/17/2026 07 PM PDT            5.96         +      Not Applicable
  10/17/2026 08 PM PDT            6.30         +      Not Applicable
  10/17/2026 09 PM PDT            6.57         +      Not Applicable
  10/17/2026 10 PM PDT            6.74         +      Not Applicable
  10/17/2026 11 PM PDT            6.64         -      Not Applicable
  10/18/2026 12 AM PDT            6.16         -      Not Applicable
  10/18/2026 01 AM PDT            5.59         -      Not Applicable
  10/18/2026 02 AM PDT            5.15         -      Not Applicable
  10/18/2026 03 AM PDT            4.71         -      Not Applicable
  10/18/2026 04 AM PDT            4.24         -      Not Applicable
  10/18/2026 05 AM PDT            3.76         -      Not Applicable
  10/18/2026 06 AM PDT            3.58         -      Not Applicable
  10/18/2026 07 AM PDT            3.77         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Trend     Forecast Status
# ------------------------------------------------------------------
  10/18/2026 08 AM PDT            4.23                Not Applicable
  10/18/2026 09 AM PDT            4.86         +      Not Applicable
  10/18/2026 10 AM PDT            5.53         +      Not Applicable
  10/18/2026 11 AM PDT            6.11         +      Not Applicable
  10/18/2026 12 PM PDT            6.50         +      Not Applicable
  10/18/2026 01 PM PDT            6.65         +      Not Applicable
  10/18/2026 02 PM PDT            6.62         -      Not Applicable
  10/18/2026 03 PM PDT            6.48         -      Not Applicable
  10/18/2026 04 PM PDT            6.30         -      Not Applicable
  10/18/2026 05 PM PDT            6.16         -      Not Applicable
  10/18/2026 06 PM PDT            6.12         -      Not Applicable
  10/18/2026 07 PM PDT            6.23         +      Not Applicable
  10/18/2026 08 PM PDT            6.46         +      Not Applicable
  10/18/2026 09 PM PDT            6.74         +      Not Applicable
  10/18/2026 10 PM PDT            6.96         +      Not Applicable
  10/18/2026 11 PM PDT            7.02         +      Not Applicable
  10/19/2026 12 AM PDT            6.85         -      Not Applicable
  10/19/2026 01 AM PDT            6.45         -      Not Applicable
  10/19/2026 02 AM PDT            5.89         -      Not Applicable
  10/19/2026 03 AM PDT            5.24         -      Not Applicable
  10/19/2026 04 AM PDT            4.57         -      Not Applicable
  10/19/2026 05 AM PDT            4.05         -      Not Applicable
  10/19/2026 06 AM PDT            3.62         -      Not Applicable
  10/19/2026 07 AM PDT            3.45         -      Not Applicable
  10/19/2026 08 AM PDT            3.65         +      Not Applicable
  10/19/2026 09 AM PDT            4.14         +      Not Applicable
  10/19/2026 10 AM PDT            4.81         +      Not Applicable
  10/19/2026 11 AM PDT            5.49         +      Not Applicable
  10/19/2026 12 PM PDT            6.11         +      Not Applicable
  10/19/2026 01 PM PDT            6.51         +      Not Applicable
  10/19/2026 02 PM PDT            6.68         +      Not Applicable
  10/19/2026 03 PM PDT            6.61         -      Not Applicable
  10/19/2026 04 PM PDT            6.39         -      Not Applicable
  10/19/2026 05 PM PDT            6.14         -      Not Applicable
  10/19/2026 06 PM PDT            5.93         -      Not Applicable
  10/19/2026 07 PM PDT            5.86         -      Not Applicable
  10/19/2026 08 PM PDT            5.96         +      Not Applicable
  10/19/2026 09 PM PDT            6.19         +      Not Applicable
  10/19/2026 10 PM PDT            6.46         +      Not Applicable
  10/19/2026 11 PM PDT            6.68         +      Not Applicable
  10/20/2026 12 AM PDT            6.74         +      Not Applicable
  10/20/2026 01 AM PDT            6.57         -      Not Applicable
  10/20/2026 02 AM PDT            6.19         -      Not Applicable
  10/20/2026 03 AM PDT            5.63         -      Not Applicable
  10/20/2026 04 AM PDT            5.02         -      Not Applicable
  10/20/2026 05 AM PDT            4.35         -      Not Applicable
  10/20/2026 06 AM PDT            3.84         -      Not Applicable
  10/20/2026 07 AM PDT            3.42         -      Not Applicable
  10/20/2026 08 AM PDT            3.27         -      Not Applicable
  10/20/2026 09 AM PDT            3.48         +      Not Applicable
  10/20/2026 10 AM PDT            4.00         +      Not Applicable
  10/20/2026 11 AM PDT            4.71         +      Not Applicable
  10/20/2026 12 PM PDT            5.42         +      Not Applicable
  10/20/2026 01 PM PDT            6.07         +      Not Applicable
  10/20/2026 02 PM PDT            6.51         +      Not Applicable
  10/20/2026 03 PM PDT            6.63         +      Not Applicable
  10/20/2026 04 PM PDT            6.40         -      Not Applicable
  10/20/2026 05 PM PDT            5.95         -      Not Applicable
  10/20/2026 06 PM PDT            5.52         -      Not Applicable
  10/20/2026 07 PM PDT            5.31         -      Not Applicable
  10/20/2026 08 PM PDT            5.33         +      Not Applicable
  10/20/2026 09 PM PDT            5.49         +      Not Applicable
  10/20/2026 10 PM PDT            5.74         +      Not Applicable
  10/20/2026 11 PM PDT            6.02         +      Not Applicable
  10/21/2026 12 AM PDT            6.25         +      Not Applicable
  10/21/2026 01 AM PDT            6.42         +      Not Applicable
  10/21/2026 02 AM PDT            6.44         +      Not Applicable
  10/21/2026 03 AM PDT            6.21         -      Not Applicable
  10/21/2026 04 AM PDT            5.73         -      Not Applicable
  10/21/2026 05 AM PDT            5.07         -      Not Applicable
  10/21/2026 06 AM PDT            4.35         -      Not Applicable
  10/21/2026 07 AM PDT            3.72         -      Not Applicable
  10/21/2026 08 AM PDT            3.21         -      Not Applicable
  10/21/2026 09 AM PDT            3.02         -      Not Applicable
  10/21/2026 10 AM PDT            3.17         +      Not Applicable
  10/21/2026 11 AM PDT            3.67         +      Not Applicable
  10/21/2026 12 PM PDT            4.33         +      Not Applicable
  10/21/2026 01 PM PDT            5.04         +      Not Applicable
  10/21/2026 02 PM PDT            5.63         +      Not Applicable
  10/21/2026 03 PM PDT            6.05         +      Not Applicable
  10/21/2026 04 PM PDT            6.16         +      Not Applicable
  10/21/2026 05 PM PDT            5.92         -      Not Applicable
  10/21/2026 06 PM PDT            5.39         -      Not Applicable
  10/21/2026 07 PM PDT            4.78         -      Not Applicable
  10/21/2026 08 PM PDT            4.27         -      Not Applicable
  10/21/2026 09 PM PDT            4.05         -      Not Applicable
  10/21/2026 10 PM PDT            4.14         +      Not Applicable
  10/21/2026 11 PM PDT            4.47         +      Not Applicable
  10/22/2026 12 AM PDT            4.88         +      Not Applicable
  10/22/2026 01 AM PDT            5.27         +      Not Applicable
  10/22/2026 02 AM PDT            5.56         +      Not Applicable
  10/22/2026 03 AM PDT            5.63         +      Not Applicable
  10/22/2026 04 AM PDT            5.44         -      Not Applicable
  10/22/2026 05 AM PDT            5.00         -      Not Applicable
  10/22/2026 06 AM PDT            4.39         -      Not Applicable
  10/22/2026 07 AM PDT            3.71         -      Not Applicable
  10/22/2026 08 AM PDT            3.10         -      Not Applicable
  10/22/2026 09 AM PDT            2.59         -      Not Applicable
  10/22/2026 10 AM PDT            2.44         -      Not Applicable
  10/22/2026 11 AM PDT            2.69         +      Not Applicable
  10/22/2026 12 PM PDT            3.37         +      Not Applicable
  10/22/2026 01 PM PDT            4.16         +      Not Applicable
  10/22/2026 02 PM PDT            4.93         +      Not Applicable
  10/22/2026 03 PM PDT            5.44         +      Not Applicable
  10/22/2026 04 PM PDT            5.62         +      Not Applicable
  10/22/2026 05 PM PDT            5.43         -      Not Applicable
  10/22/2026 06 PM PDT            4.92         -      Not Applicable
  10/22/2026 07 PM PDT            4.27         -      Not Applicable
  10/22/2026 08 PM PDT            3.61         -      Not Applicable
  10/22/2026 09 PM PDT            3.09         -      Not Applicable
  10/22/2026 10 PM PDT            2.85         -      Not Applicable
  10/22/2026 11 PM PDT            3.03         +      Not Applicable
  10/23/2026 12 AM PDT            3.51         +      Not Applicable
  10/23/2026 01 AM PDT            4.14         +      Not Applicable
  10/23/2026 02 AM PDT            4.74         +      Not Applicable
  10/23/2026 03 AM PDT            5.13         +      Not Applicable
  10/23/2026 04 AM PDT            5.26         +      Not Applicable
  10/23/2026 05 AM PDT            5.05         -      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.