SACRAMENTO RIVER DELTA - MALLARD ISLAND (MLIC1)
Latitude: 38.04º NLongitude: 121.92º WElevation: 0 FeetForecast Type: Unofficial Location
Location: Contra Costa County in CaliforniaBulletin Group: Lower SacramentoRiver Group: Lower Sacramento
Issuance Time: May 21 2026 at 7:59 AM PDTNext Issuance: May 22 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: Sacramento River Delta - Mallard Island (MLIC1)
#
# File Generation Time:  05/21/2026 at 08:00 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/20/2026 at 05:00 AM PDT
# Maximum Observed Stage:                       6.75 Feet
#
# Earliest Date & Time of Maximum Forecast:     05/26/2026 at 12:00 AM PDT
# Maximum Forecast Stage:                       5.75 Feet
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Trend     Observed Status
# ------------------------------------------------------------------
  05/16/2026 08 AM PDT            2.09                Not Applicable
  05/16/2026 09 AM PDT            1.49         -      Not Applicable
  05/16/2026 10 AM PDT            1.22         -      Not Applicable
  05/16/2026 11 AM PDT            1.38         +      Not Applicable
  05/16/2026 12 PM PDT            2.69         +      Not Applicable
  05/16/2026 01 PM PDT            3.77         +      Not Applicable
  05/16/2026 02 PM PDT            4.53         +      Not Applicable
  05/16/2026 03 PM PDT            4.93         +      Not Applicable
  05/16/2026 04 PM PDT            5.04         +      Not Applicable
  05/16/2026 05 PM PDT            4.91         -      Not Applicable
  05/16/2026 06 PM PDT            4.35         -      Not Applicable
  05/16/2026 07 PM PDT            3.67         -      Not Applicable
  05/16/2026 08 PM PDT            3.24         -      Not Applicable
  05/16/2026 09 PM PDT            3.26         +      Not Applicable
  05/16/2026 10 PM PDT            3.85         +      Not Applicable
  05/16/2026 11 PM PDT            4.91         +      Not Applicable
  05/17/2026 12 AM PDT            5.76         +      Not Applicable
  05/17/2026 01 AM PDT            6.38         +      Not Applicable
  05/17/2026 02 AM PDT            6.66         +      Not Applicable
  05/17/2026 03 AM PDT            6.68         +      Not Applicable
  05/17/2026 04 AM PDT            6.20         -      Not Applicable
  05/17/2026 05 AM PDT            5.09         -      Not Applicable
  05/17/2026 06 AM PDT            4.01         -      Not Applicable
  05/17/2026 07 AM PDT            3.24         -      Not Applicable
  05/17/2026 08 AM PDT            2.57         -      Not Applicable
  05/17/2026 09 AM PDT            1.86         -      Not Applicable
  05/17/2026 10 AM PDT            1.31         -      Not Applicable
  05/17/2026 11 AM PDT            0.96         -      Not Applicable
  05/17/2026 12 PM PDT            1.47         +      Not Applicable
  05/17/2026 01 PM PDT            2.69         +      Not Applicable
  05/17/2026 02 PM PDT            3.89         +      Not Applicable
  05/17/2026 03 PM PDT            4.65         +      Not Applicable
  05/17/2026 04 PM PDT            4.94         +      Not Applicable
  05/17/2026 05 PM PDT            5.01         +      Not Applicable
  05/17/2026 06 PM PDT            4.73         -      Not Applicable
  05/17/2026 07 PM PDT            4.14         -      Not Applicable
  05/17/2026 08 PM PDT            3.45         -      Not Applicable
  05/17/2026 09 PM PDT            3.07         -      Not Applicable
  05/17/2026 10 PM PDT            3.21         +      Not Applicable
  05/17/2026 11 PM PDT            3.99         +      Not Applicable
  05/18/2026 12 AM PDT            5.03         +      Not Applicable
  05/18/2026 01 AM PDT            5.89         +      Not Applicable
  05/18/2026 02 AM PDT            6.41         +      Not Applicable
  05/18/2026 03 AM PDT            6.65         +      Not Applicable
  05/18/2026 04 AM PDT            6.57         -      Not Applicable
  05/18/2026 05 AM PDT            5.80         -      Not Applicable
  05/18/2026 06 AM PDT            4.64         -      Not Applicable
  05/18/2026 07 AM PDT            3.60         -      Not Applicable
  05/18/2026 08 AM PDT            2.79         -      Not Applicable
  05/18/2026 09 AM PDT            2.08         -      Not Applicable
  05/18/2026 10 AM PDT            1.40         -      Not Applicable
  05/18/2026 11 AM PDT            0.87         -      Not Applicable
  05/18/2026 12 PM PDT            0.61         -      Not Applicable
  05/18/2026 01 PM PDT            1.07         +      Not Applicable
  05/18/2026 02 PM PDT            2.49         +      Not Applicable
  05/18/2026 03 PM PDT            3.70         +      Not Applicable
  05/18/2026 04 PM PDT            4.39         +      Not Applicable
  05/18/2026 05 PM PDT            4.77         +      Not Applicable
  05/18/2026 06 PM PDT            4.93         +      Not Applicable
  05/18/2026 07 PM PDT            4.81         -      Not Applicable
  05/18/2026 08 PM PDT            4.35         -      Not Applicable
  05/18/2026 09 PM PDT            3.80         -      Not Applicable
  05/18/2026 10 PM PDT            3.52         -      Not Applicable
  05/18/2026 11 PM PDT            3.77         +      Not Applicable
  05/19/2026 12 AM PDT            4.51         +      Not Applicable
  05/19/2026 01 AM PDT            5.40         +      Not Applicable
  05/19/2026 02 AM PDT            6.08         +      Not Applicable
  05/19/2026 03 AM PDT            6.59         +      Not Applicable
  05/19/2026 04 AM PDT            6.75         +      Not Applicable
  05/19/2026 05 AM PDT            6.57         -      Not Applicable
  05/19/2026 06 AM PDT            5.75         -      Not Applicable
  05/19/2026 07 AM PDT            4.64         -      Not Applicable
  05/19/2026 08 AM PDT            3.68         -      Not Applicable
  05/19/2026 09 AM PDT            2.89         -      Not Applicable
  05/19/2026 10 AM PDT            2.21         -      Not Applicable
  05/19/2026 11 AM PDT            1.62         -      Not Applicable
  05/19/2026 12 PM PDT            1.10         -      Not Applicable
  05/19/2026 01 PM PDT            0.94         -      Not Applicable
  05/19/2026 02 PM PDT            1.64         +      Not Applicable
  05/19/2026 03 PM PDT            3.02         +      Not Applicable
  05/19/2026 04 PM PDT            4.07         +      Not Applicable
  05/19/2026 05 PM PDT            4.68         +      Not Applicable
  05/19/2026 06 PM PDT            5.05         +      Not Applicable
  05/19/2026 07 PM PDT            5.18         +      Not Applicable
  05/19/2026 08 PM PDT            5.01         -      Not Applicable
  05/19/2026 09 PM PDT            4.56         -      Not Applicable
  05/19/2026 10 PM PDT            4.01         -      Not Applicable
  05/19/2026 11 PM PDT            3.74         -      Not Applicable
  05/20/2026 12 AM PDT            3.95         +      Not Applicable
  05/20/2026 01 AM PDT            4.63         +      Not Applicable
  05/20/2026 02 AM PDT            5.44         +      Not Applicable
  05/20/2026 03 AM PDT            6.11         +      Not Applicable
  05/20/2026 04 AM PDT            6.58         +      Not Applicable
  05/20/2026 05 AM PDT            6.75         +      Not Applicable
  05/20/2026 06 AM PDT            6.50         -      Not Applicable
  05/20/2026 07 AM PDT            5.68         -      Not Applicable
  05/20/2026 08 AM PDT            4.61         -      Not Applicable
  05/20/2026 09 AM PDT            3.69         -      Not Applicable
  05/20/2026 10 AM PDT            2.99         -      Not Applicable
  05/20/2026 11 AM PDT            2.32         -      Not Applicable
  05/20/2026 12 PM PDT            1.71         -      Not Applicable
  05/20/2026 01 PM PDT            1.26         -      Not Applicable
  05/20/2026 02 PM PDT            1.16         -      Not Applicable
  05/20/2026 03 PM PDT            1.89         +      Not Applicable
  05/20/2026 04 PM PDT            3.30         +      Not Applicable
  05/20/2026 05 PM PDT            4.25         +      Not Applicable
  05/20/2026 06 PM PDT            4.84         +      Not Applicable
  05/20/2026 07 PM PDT            5.18         +      Not Applicable
  05/20/2026 08 PM PDT            5.32         +      Not Applicable
  05/20/2026 09 PM PDT            5.20         -      Not Applicable
  05/20/2026 10 PM PDT            4.74         -      Not Applicable
  05/20/2026 11 PM PDT            4.16         -      Not Applicable
  05/21/2026 12 AM PDT            3.90         -      Not Applicable
  05/21/2026 01 AM PDT            4.05         +      Not Applicable
  05/21/2026 02 AM PDT            4.62         +      Not Applicable
  05/21/2026 03 AM PDT            5.35         +      Not Applicable
  05/21/2026 04 AM PDT            5.97         +      Not Applicable
  05/21/2026 05 AM PDT            6.39         +      Not Applicable
  05/21/2026 06 AM PDT            6.55         +      Not Applicable
  05/21/2026 07 AM PDT            6.26         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Trend     Forecast Status
# ------------------------------------------------------------------
  05/21/2026 08 AM PDT            5.62                Not Applicable
  05/21/2026 09 AM PDT            4.74         -      Not Applicable
  05/21/2026 10 AM PDT            3.69         -      Not Applicable
  05/21/2026 11 AM PDT            2.65         -      Not Applicable
  05/21/2026 12 PM PDT            1.75         -      Not Applicable
  05/21/2026 01 PM PDT            1.23         -      Not Applicable
  05/21/2026 02 PM PDT            1.07         -      Not Applicable
  05/21/2026 03 PM PDT            1.31         +      Not Applicable
  05/21/2026 04 PM PDT            1.90         +      Not Applicable
  05/21/2026 05 PM PDT            2.73         +      Not Applicable
  05/21/2026 06 PM PDT            3.62         +      Not Applicable
  05/21/2026 07 PM PDT            4.41         +      Not Applicable
  05/21/2026 08 PM PDT            4.95         +      Not Applicable
  05/21/2026 09 PM PDT            5.13         +      Not Applicable
  05/21/2026 10 PM PDT            4.94         -      Not Applicable
  05/21/2026 11 PM PDT            4.49         -      Not Applicable
  05/22/2026 12 AM PDT            3.94         -      Not Applicable
  05/22/2026 01 AM PDT            3.52         -      Not Applicable
  05/22/2026 02 AM PDT            3.40         -      Not Applicable
  05/22/2026 03 AM PDT            3.65         +      Not Applicable
  05/22/2026 04 AM PDT            4.19         +      Not Applicable
  05/22/2026 05 AM PDT            4.82         +      Not Applicable
  05/22/2026 06 AM PDT            5.32         +      Not Applicable
  05/22/2026 07 AM PDT            5.50         +      Not Applicable
  05/22/2026 08 AM PDT            5.33         -      Not Applicable
  05/22/2026 09 AM PDT            4.84         -      Not Applicable
  05/22/2026 10 AM PDT            4.14         -      Not Applicable
  05/22/2026 11 AM PDT            3.30         -      Not Applicable
  05/22/2026 12 PM PDT            2.46         -      Not Applicable
  05/22/2026 01 PM PDT            1.75         -      Not Applicable
  05/22/2026 02 PM PDT            1.30         -      Not Applicable
  05/22/2026 03 PM PDT            1.17         -      Not Applicable
  05/22/2026 04 PM PDT            1.42         +      Not Applicable
  05/22/2026 05 PM PDT            2.01         +      Not Applicable
  05/22/2026 06 PM PDT            2.83         +      Not Applicable
  05/22/2026 07 PM PDT            3.73         +      Not Applicable
  05/22/2026 08 PM PDT            4.53         +      Not Applicable
  05/22/2026 09 PM PDT            5.07         +      Not Applicable
  05/22/2026 10 PM PDT            5.23         +      Not Applicable
  05/22/2026 11 PM PDT            4.98         -      Not Applicable
  05/23/2026 12 AM PDT            4.43         -      Not Applicable
  05/23/2026 01 AM PDT            3.77         -      Not Applicable
  05/23/2026 02 AM PDT            3.25         -      Not Applicable
  05/23/2026 03 AM PDT            3.05         -      Not Applicable
  05/23/2026 04 AM PDT            3.18         +      Not Applicable
  05/23/2026 05 AM PDT            3.56         +      Not Applicable
  05/23/2026 06 AM PDT            4.06         +      Not Applicable
  05/23/2026 07 AM PDT            4.57         +      Not Applicable
  05/23/2026 08 AM PDT            4.92         +      Not Applicable
  05/23/2026 09 AM PDT            5.02         +      Not Applicable
  05/23/2026 10 AM PDT            4.79         -      Not Applicable
  05/23/2026 11 AM PDT            4.27         -      Not Applicable
  05/23/2026 12 PM PDT            3.52         -      Not Applicable
  05/23/2026 01 PM PDT            2.69         -      Not Applicable
  05/23/2026 02 PM PDT            1.96         -      Not Applicable
  05/23/2026 03 PM PDT            1.47         -      Not Applicable
  05/23/2026 04 PM PDT            1.32         -      Not Applicable
  05/23/2026 05 PM PDT            1.56         +      Not Applicable
  05/23/2026 06 PM PDT            2.15         +      Not Applicable
  05/23/2026 07 PM PDT            2.98         +      Not Applicable
  05/23/2026 08 PM PDT            3.88         +      Not Applicable
  05/23/2026 09 PM PDT            4.69         +      Not Applicable
  05/23/2026 10 PM PDT            5.23         +      Not Applicable
  05/23/2026 11 PM PDT            5.41         +      Not Applicable
  05/24/2026 12 AM PDT            5.20         -      Not Applicable
  05/24/2026 01 AM PDT            4.67         -      Not Applicable
  05/24/2026 02 AM PDT            3.97         -      Not Applicable
  05/24/2026 03 AM PDT            3.27         -      Not Applicable
  05/24/2026 04 AM PDT            2.77         -      Not Applicable
  05/24/2026 05 AM PDT            2.63         -      Not Applicable
  05/24/2026 06 AM PDT            2.86         +      Not Applicable
  05/24/2026 07 AM PDT            3.38         +      Not Applicable
  05/24/2026 08 AM PDT            4.00         +      Not Applicable
  05/24/2026 09 AM PDT            4.48         +      Not Applicable
  05/24/2026 10 AM PDT            4.66         +      Not Applicable
  05/24/2026 11 AM PDT            4.49         -      Not Applicable
  05/24/2026 12 PM PDT            4.04         -      Not Applicable
  05/24/2026 01 PM PDT            3.40         -      Not Applicable
  05/24/2026 02 PM PDT            2.69         -      Not Applicable
  05/24/2026 03 PM PDT            2.06         -      Not Applicable
  05/24/2026 04 PM PDT            1.64         -      Not Applicable
  05/24/2026 05 PM PDT            1.52         -      Not Applicable
  05/24/2026 06 PM PDT            1.76         +      Not Applicable
  05/24/2026 07 PM PDT            2.36         +      Not Applicable
  05/24/2026 08 PM PDT            3.18         +      Not Applicable
  05/24/2026 09 PM PDT            4.08         +      Not Applicable
  05/24/2026 10 PM PDT            4.87         +      Not Applicable
  05/24/2026 11 PM PDT            5.42         +      Not Applicable
  05/25/2026 12 AM PDT            5.58         +      Not Applicable
  05/25/2026 01 AM PDT            5.31         -      Not Applicable
  05/25/2026 02 AM PDT            4.67         -      Not Applicable
  05/25/2026 03 AM PDT            3.81         -      Not Applicable
  05/25/2026 04 AM PDT            2.96         -      Not Applicable
  05/25/2026 05 AM PDT            2.37         -      Not Applicable
  05/25/2026 06 AM PDT            2.18         -      Not Applicable
  05/25/2026 07 AM PDT            2.44         +      Not Applicable
  05/25/2026 08 AM PDT            3.02         +      Not Applicable
  05/25/2026 09 AM PDT            3.71         +      Not Applicable
  05/25/2026 10 AM PDT            4.25         +      Not Applicable
  05/25/2026 11 AM PDT            4.46         +      Not Applicable
  05/25/2026 12 PM PDT            4.33         -      Not Applicable
  05/25/2026 01 PM PDT            3.95         -      Not Applicable
  05/25/2026 02 PM PDT            3.40         -      Not Applicable
  05/25/2026 03 PM PDT            2.78         -      Not Applicable
  05/25/2026 04 PM PDT            2.24         -      Not Applicable
  05/25/2026 05 PM PDT            1.87         -      Not Applicable
  05/25/2026 06 PM PDT            1.80         -      Not Applicable
  05/25/2026 07 PM PDT            2.16         +      Not Applicable
  05/25/2026 08 PM PDT            2.91         +      Not Applicable
  05/25/2026 09 PM PDT            3.88         +      Not Applicable
  05/25/2026 10 PM PDT            4.83         +      Not Applicable
  05/25/2026 11 PM PDT            5.51         +      Not Applicable
  05/26/2026 12 AM PDT            5.75         +      Not Applicable
  05/26/2026 01 AM PDT            5.55         -      Not Applicable
  05/26/2026 02 AM PDT            4.96         -      Not Applicable
  05/26/2026 03 AM PDT            4.15         -      Not Applicable
  05/26/2026 04 AM PDT            3.24         -      Not Applicable
  05/26/2026 05 AM PDT            2.43         -      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.