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: Mar 29 2026 at 7:48 AM PDTNext Issuance: Mar 30 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:  03/29/2026 at 07:50 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/25/2026 at 11:00 AM PDT
# Maximum Observed Stage:                       6.80 Feet
#
# Earliest Date & Time of Maximum Forecast:     03/29/2026 at 03:00 PM PDT
# Maximum Forecast Stage:                       6.50 Feet
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Trend     Observed Status
# ------------------------------------------------------------------
  03/24/2026 07 AM PDT            5.88                Not Applicable
  03/24/2026 08 AM PDT            6.28         +      Not Applicable
  03/24/2026 09 AM PDT            6.63         +      Not Applicable
  03/24/2026 10 AM PDT            6.76         +      Not Applicable
  03/24/2026 11 AM PDT            6.43         -      Not Applicable
  03/24/2026 12 PM PDT            5.64         -      Not Applicable
  03/24/2026 01 PM PDT            5.22         -      Not Applicable
  03/24/2026 02 PM PDT            4.69         -      Not Applicable
  03/24/2026 03 PM PDT            4.18         -      Not Applicable
  03/24/2026 04 PM PDT            3.60         -      Not Applicable
  03/24/2026 05 PM PDT            3.11         -      Not Applicable
  03/24/2026 06 PM PDT            2.69         -      Not Applicable
  03/24/2026 07 PM PDT            2.60         -      Not Applicable
  03/24/2026 08 PM PDT            3.28         +      Not Applicable
  03/24/2026 09 PM PDT            4.18         +      Not Applicable
  03/24/2026 10 PM PDT            4.66         +      Not Applicable
  03/24/2026 11 PM PDT            5.04         +      Not Applicable
  03/25/2026 12 AM PDT            5.34         +      Not Applicable
  03/25/2026 01 AM PDT            5.43         +      Not Applicable
  03/25/2026 02 AM PDT            5.27         -      Not Applicable
  03/25/2026 03 AM PDT            4.79         -      Not Applicable
  03/25/2026 04 AM PDT            4.40         -      Not Applicable
  03/25/2026 05 AM PDT            4.44         +      Not Applicable
  03/25/2026 06 AM PDT            4.86         +      Not Applicable
  03/25/2026 07 AM PDT            5.48         +      Not Applicable
  03/25/2026 08 AM PDT            5.93         +      Not Applicable
  03/25/2026 09 AM PDT            6.32         +      Not Applicable
  03/25/2026 10 AM PDT            6.66         +      Not Applicable
  03/25/2026 11 AM PDT            6.80         +      Not Applicable
  03/25/2026 12 PM PDT            6.53         -      Not Applicable
  03/25/2026 01 PM PDT            5.82         -      Not Applicable
  03/25/2026 02 PM PDT            5.20         -      Not Applicable
  03/25/2026 03 PM PDT            4.76         -      Not Applicable
  03/25/2026 04 PM PDT            4.24         -      Not Applicable
  03/25/2026 05 PM PDT            3.74         -      Not Applicable
  03/25/2026 06 PM PDT            3.26         -      Not Applicable
  03/25/2026 07 PM PDT            2.90         -      Not Applicable
  03/25/2026 08 PM PDT            2.70         -      Not Applicable
  03/25/2026 09 PM PDT            3.13         +      Not Applicable
  03/25/2026 10 PM PDT            4.04         +      Not Applicable
  03/25/2026 11 PM PDT            4.62         +      Not Applicable
  03/26/2026 12 AM PDT            4.98         +      Not Applicable
  03/26/2026 01 AM PDT            5.31         +      Not Applicable
  03/26/2026 02 AM PDT            5.52         +      Not Applicable
  03/26/2026 03 AM PDT            5.50         -      Not Applicable
  03/26/2026 04 AM PDT            5.11         -      Not Applicable
  03/26/2026 05 AM PDT            4.63         -      Not Applicable
  03/26/2026 06 AM PDT            4.45         -      Not Applicable
  03/26/2026 07 AM PDT            4.62         +      Not Applicable
  03/26/2026 08 AM PDT            5.11         +      Not Applicable
  03/26/2026 09 AM PDT            5.61         +      Not Applicable
  03/26/2026 10 AM PDT            6.00         +      Not Applicable
  03/26/2026 11 AM PDT            6.30         +      Not Applicable
  03/26/2026 12 PM PDT            6.45         +      Not Applicable
  03/26/2026 01 PM PDT            6.23         -      Not Applicable
  03/26/2026 02 PM PDT            5.51         -      Not Applicable
  03/26/2026 03 PM PDT            4.88         -      Not Applicable
  03/26/2026 04 PM PDT            4.43         -      Not Applicable
  03/26/2026 05 PM PDT            3.94         -      Not Applicable
  03/26/2026 06 PM PDT            3.41         -      Not Applicable
  03/26/2026 07 PM PDT            2.88         -      Not Applicable
  03/26/2026 08 PM PDT            2.42         -      Not Applicable
  03/26/2026 09 PM PDT            2.16         -      Not Applicable
  03/26/2026 10 PM PDT            2.51         +      Not Applicable
  03/26/2026 11 PM PDT            3.52         +      Not Applicable
  03/27/2026 12 AM PDT            4.19         +      Not Applicable
  03/27/2026 01 AM PDT            4.62         +      Not Applicable
  03/27/2026 02 AM PDT            5.00         +      Not Applicable
  03/27/2026 03 AM PDT            5.29         +      Not Applicable
  03/27/2026 04 AM PDT            5.35         +      Not Applicable
  03/27/2026 05 AM PDT            5.01         -      Not Applicable
  03/27/2026 06 AM PDT            4.43         -      Not Applicable
  03/27/2026 07 AM PDT            4.08         -      Not Applicable
  03/27/2026 08 AM PDT            4.06         -      Not Applicable
  03/27/2026 09 AM PDT            4.39         +      Not Applicable
  03/27/2026 10 AM PDT            5.06         +      Not Applicable
  03/27/2026 11 AM PDT            5.57         +      Not Applicable
  03/27/2026 12 PM PDT            5.90         +      Not Applicable
  03/27/2026 01 PM PDT            6.14         +      Not Applicable
  03/27/2026 02 PM PDT            6.17         +      Not Applicable
  03/27/2026 03 PM PDT            5.67         -      Not Applicable
  03/27/2026 04 PM PDT            4.90         -      Not Applicable
  03/27/2026 05 PM PDT            4.37         -      Not Applicable
  03/27/2026 06 PM PDT            3.92         -      Not Applicable
  03/27/2026 07 PM PDT            3.46         -      Not Applicable
  03/27/2026 08 PM PDT            2.91         -      Not Applicable
  03/27/2026 09 PM PDT            2.47         -      Not Applicable
  03/27/2026 10 PM PDT            2.20         -      Not Applicable
  03/27/2026 11 PM PDT            2.66         +      Not Applicable
  03/28/2026 12 AM PDT            3.69         +      Not Applicable
  03/28/2026 01 AM PDT            4.33         +      Not Applicable
  03/28/2026 02 AM PDT            4.79         +      Not Applicable
  03/28/2026 03 AM PDT            5.21         +      Not Applicable
  03/28/2026 04 AM PDT            5.50         +      Not Applicable
  03/28/2026 05 AM PDT            5.47         -      Not Applicable
  03/28/2026 06 AM PDT            5.01         -      Not Applicable
  03/28/2026 07 AM PDT            4.39         -      Not Applicable
  03/28/2026 08 AM PDT            4.03         -      Not Applicable
  03/28/2026 09 AM PDT            3.86         -      Not Applicable
  03/28/2026 10 AM PDT            4.09         +      Not Applicable
  03/28/2026 11 AM PDT            4.86         +      Not Applicable
  03/28/2026 12 PM PDT            5.53         +      Not Applicable
  03/28/2026 01 PM PDT            5.93         +      Not Applicable
  03/28/2026 02 PM PDT            6.26         +      Not Applicable
  03/28/2026 03 PM PDT            6.37         +      Not Applicable
  03/28/2026 04 PM PDT            5.96         -      Not Applicable
  03/28/2026 05 PM PDT            5.17         -      Not Applicable
  03/28/2026 06 PM PDT            4.60         -      Not Applicable
  03/28/2026 07 PM PDT            4.15         -      Not Applicable
  03/28/2026 08 PM PDT            3.63         -      Not Applicable
  03/28/2026 09 PM PDT            3.12         -      Not Applicable
  03/28/2026 10 PM PDT            2.68         -      Not Applicable
  03/28/2026 11 PM PDT            2.53         -      Not Applicable
  03/29/2026 12 AM PDT            3.12         +      Not Applicable
  03/29/2026 01 AM PDT            4.16         +      Not Applicable
  03/29/2026 02 AM PDT            4.74         +      Not Applicable
  03/29/2026 03 AM PDT            5.19         +      Not Applicable
  03/29/2026 04 AM PDT            5.57         +      Not Applicable
  03/29/2026 05 AM PDT            5.46         -      Not Applicable
  03/29/2026 06 AM PDT            5.09         -      Not Applicable
  03/29/2026 07 AM PDT            4.57         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Trend     Forecast Status
# ------------------------------------------------------------------
  03/29/2026 08 AM PDT            4.06                Not Applicable
  03/29/2026 09 AM PDT            3.67         -      Not Applicable
  03/29/2026 10 AM PDT            3.60         -      Not Applicable
  03/29/2026 11 AM PDT            3.99         +      Not Applicable
  03/29/2026 12 PM PDT            4.74         +      Not Applicable
  03/29/2026 01 PM PDT            5.57         +      Not Applicable
  03/29/2026 02 PM PDT            6.23         +      Not Applicable
  03/29/2026 03 PM PDT            6.50         +      Not Applicable
  03/29/2026 04 PM PDT            6.36         -      Not Applicable
  03/29/2026 05 PM PDT            5.88         -      Not Applicable
  03/29/2026 06 PM PDT            5.18         -      Not Applicable
  03/29/2026 07 PM PDT            4.39         -      Not Applicable
  03/29/2026 08 PM PDT            3.59         -      Not Applicable
  03/29/2026 09 PM PDT            2.85         -      Not Applicable
  03/29/2026 10 PM PDT            2.32         -      Not Applicable
  03/29/2026 11 PM PDT            2.16         -      Not Applicable
  03/30/2026 12 AM PDT            2.45         +      Not Applicable
  03/30/2026 01 AM PDT            3.30         +      Not Applicable
  03/30/2026 02 AM PDT            4.24         +      Not Applicable
  03/30/2026 03 AM PDT            5.14         +      Not Applicable
  03/30/2026 04 AM PDT            5.76         +      Not Applicable
  03/30/2026 05 AM PDT            6.00         +      Not Applicable
  03/30/2026 06 AM PDT            5.83         -      Not Applicable
  03/30/2026 07 AM PDT            5.34         -      Not Applicable
  03/30/2026 08 AM PDT            4.70         -      Not Applicable
  03/30/2026 09 AM PDT            4.05         -      Not Applicable
  03/30/2026 10 AM PDT            3.58         -      Not Applicable
  03/30/2026 11 AM PDT            3.43         -      Not Applicable
  03/30/2026 12 PM PDT            3.79         +      Not Applicable
  03/30/2026 01 PM PDT            4.59         +      Not Applicable
  03/30/2026 02 PM PDT            5.44         +      Not Applicable
  03/30/2026 03 PM PDT            6.12         +      Not Applicable
  03/30/2026 04 PM PDT            6.38         +      Not Applicable
  03/30/2026 05 PM PDT            6.18         -      Not Applicable
  03/30/2026 06 PM PDT            5.61         -      Not Applicable
  03/30/2026 07 PM PDT            4.82         -      Not Applicable
  03/30/2026 08 PM PDT            3.96         -      Not Applicable
  03/30/2026 09 PM PDT            3.16         -      Not Applicable
  03/30/2026 10 PM PDT            2.49         -      Not Applicable
  03/30/2026 11 PM PDT            2.26         -      Not Applicable
  03/31/2026 12 AM PDT            2.45         +      Not Applicable
  03/31/2026 01 AM PDT            3.10         +      Not Applicable
  03/31/2026 02 AM PDT            3.93         +      Not Applicable
  03/31/2026 03 AM PDT            4.81         +      Not Applicable
  03/31/2026 04 AM PDT            5.55         +      Not Applicable
  03/31/2026 05 AM PDT            6.06         +      Not Applicable
  03/31/2026 06 AM PDT            6.19         +      Not Applicable
  03/31/2026 07 AM PDT            5.83         -      Not Applicable
  03/31/2026 08 AM PDT            5.09         -      Not Applicable
  03/31/2026 09 AM PDT            4.22         -      Not Applicable
  03/31/2026 10 AM PDT            3.51         -      Not Applicable
  03/31/2026 11 AM PDT            3.16         -      Not Applicable
  03/31/2026 12 PM PDT            3.36         +      Not Applicable
  03/31/2026 01 PM PDT            3.99         +      Not Applicable
  03/31/2026 02 PM PDT            4.83         +      Not Applicable
  03/31/2026 03 PM PDT            5.58         +      Not Applicable
  03/31/2026 04 PM PDT            6.13         +      Not Applicable
  03/31/2026 05 PM PDT            6.33         +      Not Applicable
  03/31/2026 06 PM PDT            6.12         -      Not Applicable
  03/31/2026 07 PM PDT            5.57         -      Not Applicable
  03/31/2026 08 PM PDT            4.81         -      Not Applicable
  03/31/2026 09 PM PDT            3.98         -      Not Applicable
  03/31/2026 10 PM PDT            3.23         -      Not Applicable
  03/31/2026 11 PM PDT            2.58         -      Not Applicable
  04/01/2026 12 AM PDT            2.38         -      Not Applicable
  04/01/2026 01 AM PDT            2.67         +      Not Applicable
  04/01/2026 02 AM PDT            3.48         +      Not Applicable
  04/01/2026 03 AM PDT            4.41         +      Not Applicable
  04/01/2026 04 AM PDT            5.27         +      Not Applicable
  04/01/2026 05 AM PDT            5.88         +      Not Applicable
  04/01/2026 06 AM PDT            6.12         +      Not Applicable
  04/01/2026 07 AM PDT            5.96         -      Not Applicable
  04/01/2026 08 AM PDT            5.48         -      Not Applicable
  04/01/2026 09 AM PDT            4.81         -      Not Applicable
  04/01/2026 10 AM PDT            4.07         -      Not Applicable
  04/01/2026 11 AM PDT            3.40         -      Not Applicable
  04/01/2026 12 PM PDT            2.85         -      Not Applicable
  04/01/2026 01 PM PDT            2.69         -      Not Applicable
  04/01/2026 02 PM PDT            3.11         +      Not Applicable
  04/01/2026 03 PM PDT            3.93         +      Not Applicable
  04/01/2026 04 PM PDT            4.87         +      Not Applicable
  04/01/2026 05 PM PDT            5.53         +      Not Applicable
  04/01/2026 06 PM PDT            5.81         +      Not Applicable
  04/01/2026 07 PM PDT            5.68         -      Not Applicable
  04/01/2026 08 PM PDT            5.24         -      Not Applicable
  04/01/2026 09 PM PDT            4.63         -      Not Applicable
  04/01/2026 10 PM PDT            3.94         -      Not Applicable
  04/01/2026 11 PM PDT            3.34         -      Not Applicable
  04/02/2026 12 AM PDT            2.81         -      Not Applicable
  04/02/2026 01 AM PDT            2.67         -      Not Applicable
  04/02/2026 02 AM PDT            2.97         +      Not Applicable
  04/02/2026 03 AM PDT            3.67         +      Not Applicable
  04/02/2026 04 AM PDT            4.56         +      Not Applicable
  04/02/2026 05 AM PDT            5.34         +      Not Applicable
  04/02/2026 06 AM PDT            5.92         +      Not Applicable
  04/02/2026 07 AM PDT            6.13         +      Not Applicable
  04/02/2026 08 AM PDT            5.93         -      Not Applicable
  04/02/2026 09 AM PDT            5.39         -      Not Applicable
  04/02/2026 10 AM PDT            4.66         -      Not Applicable
  04/02/2026 11 AM PDT            3.85         -      Not Applicable
  04/02/2026 12 PM PDT            3.10         -      Not Applicable
  04/02/2026 01 PM PDT            2.48         -      Not Applicable
  04/02/2026 02 PM PDT            2.29         -      Not Applicable
  04/02/2026 03 PM PDT            2.62         +      Not Applicable
  04/02/2026 04 PM PDT            3.48         +      Not Applicable
  04/02/2026 05 PM PDT            4.35         +      Not Applicable
  04/02/2026 06 PM PDT            4.98         +      Not Applicable
  04/02/2026 07 PM PDT            5.23         +      Not Applicable
  04/02/2026 08 PM PDT            5.09         -      Not Applicable
  04/02/2026 09 PM PDT            4.68         -      Not Applicable
  04/02/2026 10 PM PDT            4.12         -      Not Applicable
  04/02/2026 11 PM PDT            3.58         -      Not Applicable
  04/03/2026 12 AM PDT            3.14         -      Not Applicable
  04/03/2026 01 AM PDT            2.97         -      Not Applicable
  04/03/2026 02 AM PDT            3.26         +      Not Applicable
  04/03/2026 03 AM PDT            3.87         +      Not Applicable
  04/03/2026 04 AM PDT            4.69         +      Not Applicable
  04/03/2026 05 AM PDT            5.42         +      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.