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: Jun 06 2026 at 7:59 AM PDTNext Issuance: Jun 07 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:  06/06/2026 at 08:01 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  06/02/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       7.13 Feet
#
# Earliest Date & Time of Maximum Forecast:     06/11/2026 at 02:00 AM PDT
# Maximum Forecast Stage:                       6.43 Feet
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Trend     Observed Status
# ------------------------------------------------------------------
  06/01/2026 08 AM PDT            6.15                Not Applicable
  06/01/2026 09 AM PDT            5.52         -      Not Applicable
  06/01/2026 10 AM PDT            5.08         -      Not Applicable
  06/01/2026 11 AM PDT            4.55         -      Not Applicable
  06/01/2026 12 PM PDT            4.01         -      Not Applicable
  06/01/2026 01 PM PDT            3.48         -      Not Applicable
  06/01/2026 02 PM PDT            3.02         -      Not Applicable
  06/01/2026 03 PM PDT            2.76         -      Not Applicable
  06/01/2026 04 PM PDT            3.23         +      Not Applicable
  06/01/2026 05 PM PDT            4.29         +      Not Applicable
  06/01/2026 06 PM PDT            4.91         +      Not Applicable
  06/01/2026 07 PM PDT            5.28         +      Not Applicable
  06/01/2026 08 PM PDT            5.62         +      Not Applicable
  06/01/2026 09 PM PDT            5.84         +      Not Applicable
  06/01/2026 10 PM PDT            5.76         -      Not Applicable
  06/01/2026 11 PM PDT            5.32         -      Not Applicable
  06/02/2026 12 AM PDT            4.84         -      Not Applicable
  06/02/2026 01 AM PDT            4.75         -      Not Applicable
  06/02/2026 02 AM PDT            5.17         +      Not Applicable
  06/02/2026 03 AM PDT            5.83         +      Not Applicable
  06/02/2026 04 AM PDT            6.32         +      Not Applicable
  06/02/2026 05 AM PDT            6.73         +      Not Applicable
  06/02/2026 06 AM PDT            7.06         +      Not Applicable
  06/02/2026 07 AM PDT            7.13         +      Not Applicable
  06/02/2026 08 AM PDT            6.71         -      Not Applicable
  06/02/2026 09 AM PDT            5.96         -      Not Applicable
  06/02/2026 10 AM PDT            5.41         -      Not Applicable
  06/02/2026 11 AM PDT            4.95         -      Not Applicable
  06/02/2026 12 PM PDT            4.44         -      Not Applicable
  06/02/2026 01 PM PDT            3.93         -      Not Applicable
  06/02/2026 02 PM PDT            3.44         -      Not Applicable
  06/02/2026 03 PM PDT            3.06         -      Not Applicable
  06/02/2026 04 PM PDT            3.06         0      Not Applicable
  06/02/2026 05 PM PDT            3.90         +      Not Applicable
  06/02/2026 06 PM PDT            4.79         +      Not Applicable
  06/02/2026 07 PM PDT            5.22         +      Not Applicable
  06/02/2026 08 PM PDT            5.52         +      Not Applicable
  06/02/2026 09 PM PDT            5.79         +      Not Applicable
  06/02/2026 10 PM PDT            5.92         +      Not Applicable
  06/02/2026 11 PM PDT            5.75         -      Not Applicable
  06/03/2026 12 AM PDT            5.26         -      Not Applicable
  06/03/2026 01 AM PDT            4.91         -      Not Applicable
  06/03/2026 02 AM PDT            4.93         +      Not Applicable
  06/03/2026 03 AM PDT            5.37         +      Not Applicable
  06/03/2026 04 AM PDT            5.97         +      Not Applicable
  06/03/2026 05 AM PDT            6.39         +      Not Applicable
  06/03/2026 06 AM PDT            6.73         +      Not Applicable
  06/03/2026 07 AM PDT            6.93         +      Not Applicable
  06/03/2026 08 AM PDT            6.76         -      Not Applicable
  06/03/2026 09 AM PDT            6.09         -      Not Applicable
  06/03/2026 10 AM PDT            5.45         -      Not Applicable
  06/03/2026 11 AM PDT            5.03         -      Not Applicable
  06/03/2026 12 PM PDT            4.54         -      Not Applicable
  06/03/2026 01 PM PDT            4.09         -      Not Applicable
  06/03/2026 02 PM PDT            3.57         -      Not Applicable
  06/03/2026 03 PM PDT            3.14         -      Not Applicable
  06/03/2026 04 PM PDT            2.87         -      Not Applicable
  06/03/2026 05 PM PDT            3.16         +      Not Applicable
  06/03/2026 06 PM PDT            4.16         +      Not Applicable
  06/03/2026 07 PM PDT            4.82         +      Not Applicable
  06/03/2026 08 PM PDT            5.14         +      Not Applicable
  06/03/2026 09 PM PDT            5.47         +      Not Applicable
  06/03/2026 10 PM PDT            5.73         +      Not Applicable
  06/03/2026 11 PM PDT            5.79         +      Not Applicable
  06/04/2026 12 AM PDT            5.52         -      Not Applicable
  06/04/2026 01 AM PDT            5.10         -      Not Applicable
  06/04/2026 02 AM PDT            4.89         -      Not Applicable
  06/04/2026 03 AM PDT            5.07         +      Not Applicable
  06/04/2026 04 AM PDT            5.62         +      Not Applicable
  06/04/2026 05 AM PDT            6.11         +      Not Applicable
  06/04/2026 06 AM PDT            6.46         +      Not Applicable
  06/04/2026 07 AM PDT            6.74         +      Not Applicable
  06/04/2026 08 AM PDT            6.83         +      Not Applicable
  06/04/2026 09 AM PDT            6.51         -      Not Applicable
  06/04/2026 10 AM PDT            5.79         -      Not Applicable
  06/04/2026 11 AM PDT            5.21         -      Not Applicable
  06/04/2026 12 PM PDT            4.79         -      Not Applicable
  06/04/2026 01 PM PDT            4.26         -      Not Applicable
  06/04/2026 02 PM PDT            3.74         -      Not Applicable
  06/04/2026 03 PM PDT            3.26         -      Not Applicable
  06/04/2026 04 PM PDT            2.86         -      Not Applicable
  06/04/2026 05 PM PDT            2.76         -      Not Applicable
  06/04/2026 06 PM PDT            3.47         +      Not Applicable
  06/04/2026 07 PM PDT            4.40         +      Not Applicable
  06/04/2026 08 PM PDT            4.88         +      Not Applicable
  06/04/2026 09 PM PDT            5.22         +      Not Applicable
  06/04/2026 10 PM PDT            5.55         +      Not Applicable
  06/04/2026 11 PM PDT            5.79         +      Not Applicable
  06/05/2026 12 AM PDT            5.76         -      Not Applicable
  06/05/2026 01 AM PDT            5.40         -      Not Applicable
  06/05/2026 02 AM PDT            4.98         -      Not Applicable
  06/05/2026 03 AM PDT            4.83         -      Not Applicable
  06/05/2026 04 AM PDT            5.04         +      Not Applicable
  06/05/2026 05 AM PDT            5.56         +      Not Applicable
  06/05/2026 06 AM PDT            6.02         +      Not Applicable
  06/05/2026 07 AM PDT            6.36         +      Not Applicable
  06/05/2026 08 AM PDT            6.60         +      Not Applicable
  06/05/2026 09 AM PDT            6.61         +      Not Applicable
  06/05/2026 10 AM PDT            6.13         -      Not Applicable
  06/05/2026 11 AM PDT            5.44         -      Not Applicable
  06/05/2026 12 PM PDT            4.95         -      Not Applicable
  06/05/2026 01 PM PDT            4.48         -      Not Applicable
  06/05/2026 02 PM PDT            3.96         -      Not Applicable
  06/05/2026 03 PM PDT            3.47         -      Not Applicable
  06/05/2026 04 PM PDT            3.02         -      Not Applicable
  06/05/2026 05 PM PDT            3.07         +      Not Applicable
  06/05/2026 06 PM PDT            3.47         +      Not Applicable
  06/05/2026 07 PM PDT            4.02         +      Not Applicable
  06/05/2026 08 PM PDT            4.77         +      Not Applicable
  06/05/2026 09 PM PDT            5.38         +      Not Applicable
  06/05/2026 10 PM PDT            5.81         +      Not Applicable
  06/05/2026 11 PM PDT            6.07         +      Not Applicable
  06/06/2026 12 AM PDT            6.08         +      Not Applicable
  06/06/2026 01 AM PDT            5.91         -      Not Applicable
  06/06/2026 02 AM PDT            5.49         -      Not Applicable
  06/06/2026 03 AM PDT            5.02         -      Not Applicable
  06/06/2026 04 AM PDT            4.94         -      Not Applicable
  06/06/2026 05 AM PDT            5.11         +      Not Applicable
  06/06/2026 06 AM PDT            5.48         +      Not Applicable
  06/06/2026 07 AM PDT            5.92         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Trend     Forecast Status
# ------------------------------------------------------------------
  06/06/2026 08 AM PDT            6.27                Not Applicable
  06/06/2026 09 AM PDT            6.38         +      Not Applicable
  06/06/2026 10 AM PDT            6.23         -      Not Applicable
  06/06/2026 11 AM PDT            5.83         -      Not Applicable
  06/06/2026 12 PM PDT            5.24         -      Not Applicable
  06/06/2026 01 PM PDT            4.57         -      Not Applicable
  06/06/2026 02 PM PDT            3.89         -      Not Applicable
  06/06/2026 03 PM PDT            3.33         -      Not Applicable
  06/06/2026 04 PM PDT            2.79         -      Not Applicable
  06/06/2026 05 PM PDT            2.50         -      Not Applicable
  06/06/2026 06 PM PDT            2.64         +      Not Applicable
  06/06/2026 07 PM PDT            3.22         +      Not Applicable
  06/06/2026 08 PM PDT            3.94         +      Not Applicable
  06/06/2026 09 PM PDT            4.76         +      Not Applicable
  06/06/2026 10 PM PDT            5.42         +      Not Applicable
  06/06/2026 11 PM PDT            5.89         +      Not Applicable
  06/07/2026 12 AM PDT            6.06         +      Not Applicable
  06/07/2026 01 AM PDT            5.95         -      Not Applicable
  06/07/2026 02 AM PDT            5.63         -      Not Applicable
  06/07/2026 03 AM PDT            5.24         -      Not Applicable
  06/07/2026 04 AM PDT            4.94         -      Not Applicable
  06/07/2026 05 AM PDT            4.84         -      Not Applicable
  06/07/2026 06 AM PDT            4.96         +      Not Applicable
  06/07/2026 07 AM PDT            5.27         +      Not Applicable
  06/07/2026 08 AM PDT            5.63         +      Not Applicable
  06/07/2026 09 AM PDT            5.91         +      Not Applicable
  06/07/2026 10 AM PDT            6.00         +      Not Applicable
  06/07/2026 11 AM PDT            5.86         -      Not Applicable
  06/07/2026 12 PM PDT            5.49         -      Not Applicable
  06/07/2026 01 PM PDT            4.95         -      Not Applicable
  06/07/2026 02 PM PDT            4.33         -      Not Applicable
  06/07/2026 03 PM PDT            3.70         -      Not Applicable
  06/07/2026 04 PM PDT            3.17         -      Not Applicable
  06/07/2026 05 PM PDT            2.73         -      Not Applicable
  06/07/2026 06 PM PDT            2.62         -      Not Applicable
  06/07/2026 07 PM PDT            2.84         +      Not Applicable
  06/07/2026 08 PM PDT            3.41         +      Not Applicable
  06/07/2026 09 PM PDT            4.15         +      Not Applicable
  06/07/2026 10 PM PDT            4.94         +      Not Applicable
  06/07/2026 11 PM PDT            5.62         +      Not Applicable
  06/08/2026 12 AM PDT            6.09         +      Not Applicable
  06/08/2026 01 AM PDT            6.26         +      Not Applicable
  06/08/2026 02 AM PDT            6.16         -      Not Applicable
  06/08/2026 03 AM PDT            5.83         -      Not Applicable
  06/08/2026 04 AM PDT            5.39         -      Not Applicable
  06/08/2026 05 AM PDT            4.95         -      Not Applicable
  06/08/2026 06 AM PDT            4.64         -      Not Applicable
  06/08/2026 07 AM PDT            4.54         -      Not Applicable
  06/08/2026 08 AM PDT            4.65         +      Not Applicable
  06/08/2026 09 AM PDT            4.93         +      Not Applicable
  06/08/2026 10 AM PDT            5.26         +      Not Applicable
  06/08/2026 11 AM PDT            5.53         +      Not Applicable
  06/08/2026 12 PM PDT            5.60         +      Not Applicable
  06/08/2026 01 PM PDT            5.43         -      Not Applicable
  06/08/2026 02 PM PDT            5.03         -      Not Applicable
  06/08/2026 03 PM PDT            4.48         -      Not Applicable
  06/08/2026 04 PM PDT            3.86         -      Not Applicable
  06/08/2026 05 PM PDT            3.33         -      Not Applicable
  06/08/2026 06 PM PDT            2.87         -      Not Applicable
  06/08/2026 07 PM PDT            2.75         -      Not Applicable
  06/08/2026 08 PM PDT            3.07         +      Not Applicable
  06/08/2026 09 PM PDT            3.79         +      Not Applicable
  06/08/2026 10 PM PDT            4.69         +      Not Applicable
  06/08/2026 11 PM PDT            5.50         +      Not Applicable
  06/09/2026 12 AM PDT            6.09         +      Not Applicable
  06/09/2026 01 AM PDT            6.33         +      Not Applicable
  06/09/2026 02 AM PDT            6.24         -      Not Applicable
  06/09/2026 03 AM PDT            5.91         -      Not Applicable
  06/09/2026 04 AM PDT            5.42         -      Not Applicable
  06/09/2026 05 AM PDT            4.88         -      Not Applicable
  06/09/2026 06 AM PDT            4.39         -      Not Applicable
  06/09/2026 07 AM PDT            4.04         -      Not Applicable
  06/09/2026 08 AM PDT            3.93         -      Not Applicable
  06/09/2026 09 AM PDT            4.06         +      Not Applicable
  06/09/2026 10 AM PDT            4.39         +      Not Applicable
  06/09/2026 11 AM PDT            4.75         +      Not Applicable
  06/09/2026 12 PM PDT            5.02         +      Not Applicable
  06/09/2026 01 PM PDT            5.10         +      Not Applicable
  06/09/2026 02 PM PDT            4.92         -      Not Applicable
  06/09/2026 03 PM PDT            4.54         -      Not Applicable
  06/09/2026 04 PM PDT            4.01         -      Not Applicable
  06/09/2026 05 PM PDT            3.51         -      Not Applicable
  06/09/2026 06 PM PDT            3.10         -      Not Applicable
  06/09/2026 07 PM PDT            2.93         -      Not Applicable
  06/09/2026 08 PM PDT            3.15         +      Not Applicable
  06/09/2026 09 PM PDT            3.65         +      Not Applicable
  06/09/2026 10 PM PDT            4.37         +      Not Applicable
  06/09/2026 11 PM PDT            5.10         +      Not Applicable
  06/10/2026 12 AM PDT            5.75         +      Not Applicable
  06/10/2026 01 AM PDT            6.20         +      Not Applicable
  06/10/2026 02 AM PDT            6.35         +      Not Applicable
  06/10/2026 03 AM PDT            6.18         -      Not Applicable
  06/10/2026 04 AM PDT            5.71         -      Not Applicable
  06/10/2026 05 AM PDT            5.06         -      Not Applicable
  06/10/2026 06 AM PDT            4.36         -      Not Applicable
  06/10/2026 07 AM PDT            3.71         -      Not Applicable
  06/10/2026 08 AM PDT            3.27         -      Not Applicable
  06/10/2026 09 AM PDT            3.02         -      Not Applicable
  06/10/2026 10 AM PDT            3.15         +      Not Applicable
  06/10/2026 11 AM PDT            3.49         +      Not Applicable
  06/10/2026 12 PM PDT            3.96         +      Not Applicable
  06/10/2026 01 PM PDT            4.42         +      Not Applicable
  06/10/2026 02 PM PDT            4.72         +      Not Applicable
  06/10/2026 03 PM PDT            4.79         +      Not Applicable
  06/10/2026 04 PM PDT            4.60         -      Not Applicable
  06/10/2026 05 PM PDT            4.19         -      Not Applicable
  06/10/2026 06 PM PDT            3.72         -      Not Applicable
  06/10/2026 07 PM PDT            3.33         -      Not Applicable
  06/10/2026 08 PM PDT            3.17         -      Not Applicable
  06/10/2026 09 PM PDT            3.44         +      Not Applicable
  06/10/2026 10 PM PDT            4.08         +      Not Applicable
  06/10/2026 11 PM PDT            4.91         +      Not Applicable
  06/11/2026 12 AM PDT            5.67         +      Not Applicable
  06/11/2026 01 AM PDT            6.22         +      Not Applicable
  06/11/2026 02 AM PDT            6.43         +      Not Applicable
  06/11/2026 03 AM PDT            6.29         -      Not Applicable
  06/11/2026 04 AM PDT            5.84         -      Not Applicable
  06/11/2026 05 AM PDT            5.18         -      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.