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SAN JOAQUIN RIVER DELTA - ROUGH & READY ISLAND (RRIC1)
| Latitude: 37.96º N | Longitude: 121.36º W | Elevation: 15 Feet | | Forecast Type: Unofficial Location |
| Location: San Joaquin County in California | Bulletin Group: San Joaquin | River Group: San Joaquin |
| Issuance Time: | Aug 24 2026 at 6:59 AM PDT | Next Issuance: | Aug 25 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: 08/24/2026 at 07:00 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 08/24/2026 at 03:00 AM PDT
# Maximum Observed Stage: 7.02 Feet
#
# Earliest Date & Time of Maximum Forecast: 08/26/2026 at 04:00 AM PDT
# Maximum Forecast Stage: 6.93 Feet
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Trend Observed Status
# ------------------------------------------------------------------
08/19/2026 07 AM PDT 3.28 Not Applicable
08/19/2026 08 AM PDT 3.69 + Not Applicable
08/19/2026 09 AM PDT 4.49 + Not Applicable
08/19/2026 10 AM PDT 4.98 + Not Applicable
08/19/2026 11 AM PDT 5.27 + Not Applicable
08/19/2026 12 PM PDT 5.45 + Not Applicable
08/19/2026 01 PM PDT 5.46 + Not Applicable
08/19/2026 02 PM PDT 5.12 - Not Applicable
08/19/2026 03 PM PDT 4.60 - Not Applicable
08/19/2026 04 PM PDT 4.29 - Not Applicable
08/19/2026 05 PM PDT 4.28 - Not Applicable
08/19/2026 06 PM PDT 4.60 + Not Applicable
08/19/2026 07 PM PDT 5.24 + Not Applicable
08/19/2026 08 PM PDT 5.77 + Not Applicable
08/19/2026 09 PM PDT 6.17 + Not Applicable
08/19/2026 10 PM PDT 6.57 + Not Applicable
08/19/2026 11 PM PDT 6.86 + Not Applicable
08/20/2026 12 AM PDT 6.89 + Not Applicable
08/20/2026 01 AM PDT 6.43 - Not Applicable
08/20/2026 02 AM PDT 5.73 - Not Applicable
08/20/2026 03 AM PDT 5.26 - Not Applicable
08/20/2026 04 AM PDT 4.84 - Not Applicable
08/20/2026 05 AM PDT 4.34 - Not Applicable
08/20/2026 06 AM PDT 3.89 - Not Applicable
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 5.54 - Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Trend Forecast Status
# ------------------------------------------------------------------
08/24/2026 07 AM PDT 4.73 Not Applicable
08/24/2026 08 AM PDT 3.91 - Not Applicable
08/24/2026 09 AM PDT 3.21 - Not Applicable
08/24/2026 10 AM PDT 2.62 - Not Applicable
08/24/2026 11 AM PDT 2.44 - Not Applicable
08/24/2026 12 PM PDT 2.62 + Not Applicable
08/24/2026 01 PM PDT 3.17 + Not Applicable
08/24/2026 02 PM PDT 3.87 + Not Applicable
08/24/2026 03 PM PDT 4.65 + Not Applicable
08/24/2026 04 PM PDT 5.27 + Not Applicable
08/24/2026 05 PM PDT 5.71 + Not Applicable
08/24/2026 06 PM PDT 5.86 + Not Applicable
08/24/2026 07 PM PDT 5.69 - Not Applicable
08/24/2026 08 PM PDT 5.32 - Not Applicable
08/24/2026 09 PM PDT 4.99 - Not Applicable
08/24/2026 10 PM PDT 4.86 - Not Applicable
08/24/2026 11 PM PDT 5.01 + Not Applicable
08/25/2026 12 AM PDT 5.39 + Not Applicable
08/25/2026 01 AM PDT 5.90 + Not Applicable
08/25/2026 02 AM PDT 6.40 + Not Applicable
08/25/2026 03 AM PDT 6.76 + Not Applicable
08/25/2026 04 AM PDT 6.87 + Not Applicable
08/25/2026 05 AM PDT 6.67 - Not Applicable
08/25/2026 06 AM PDT 6.17 - Not Applicable
08/25/2026 07 AM PDT 5.44 - Not Applicable
08/25/2026 08 AM PDT 4.63 - Not Applicable
08/25/2026 09 AM PDT 3.81 - Not Applicable
08/25/2026 10 AM PDT 3.09 - Not Applicable
08/25/2026 11 AM PDT 2.52 - Not Applicable
08/25/2026 12 PM PDT 2.33 - Not Applicable
08/25/2026 01 PM PDT 2.51 + Not Applicable
08/25/2026 02 PM PDT 3.08 + Not Applicable
08/25/2026 03 PM PDT 3.81 + Not Applicable
08/25/2026 04 PM PDT 4.61 + Not Applicable
08/25/2026 05 PM PDT 5.25 + Not Applicable
08/25/2026 06 PM PDT 5.70 + Not Applicable
08/25/2026 07 PM PDT 5.84 + Not Applicable
08/25/2026 08 PM PDT 5.63 - Not Applicable
08/25/2026 09 PM PDT 5.21 - Not Applicable
08/25/2026 10 PM PDT 4.82 - Not Applicable
08/25/2026 11 PM PDT 4.70 - Not Applicable
08/26/2026 12 AM PDT 4.96 + Not Applicable
08/26/2026 01 AM PDT 5.53 + Not Applicable
08/26/2026 02 AM PDT 6.21 + Not Applicable
08/26/2026 03 AM PDT 6.73 + Not Applicable
08/26/2026 04 AM PDT 6.93 + Not Applicable
08/26/2026 05 AM PDT 6.76 - Not Applicable
08/26/2026 06 AM PDT 6.27 - Not Applicable
08/26/2026 07 AM PDT 5.54 - Not Applicable
08/26/2026 08 AM PDT 4.72 - Not Applicable
08/26/2026 09 AM PDT 3.90 - Not Applicable
08/26/2026 10 AM PDT 3.20 - Not Applicable
08/26/2026 11 AM PDT 2.62 - Not Applicable
08/26/2026 12 PM PDT 2.44 - Not Applicable
08/26/2026 01 PM PDT 2.62 + Not Applicable
08/26/2026 02 PM PDT 3.19 + Not Applicable
08/26/2026 03 PM PDT 3.90 + Not Applicable
08/26/2026 04 PM PDT 4.70 + Not Applicable
08/26/2026 05 PM PDT 5.34 + Not Applicable
08/26/2026 06 PM PDT 5.80 + Not Applicable
08/26/2026 07 PM PDT 5.95 + Not Applicable
08/26/2026 08 PM PDT 5.78 - Not Applicable
08/26/2026 09 PM PDT 5.37 - Not Applicable
08/26/2026 10 PM PDT 4.89 - Not Applicable
08/26/2026 11 PM PDT 4.51 - Not Applicable
08/27/2026 12 AM PDT 4.40 - Not Applicable
08/27/2026 01 AM PDT 4.70 + Not Applicable
08/27/2026 02 AM PDT 5.31 + Not Applicable
08/27/2026 03 AM PDT 6.04 + Not Applicable
08/27/2026 04 AM PDT 6.60 + Not Applicable
08/27/2026 05 AM PDT 6.82 + Not Applicable
08/27/2026 06 AM PDT 6.66 - Not Applicable
08/27/2026 07 AM PDT 6.19 - Not Applicable
08/27/2026 08 AM PDT 5.47 - Not Applicable
08/27/2026 09 AM PDT 4.68 - Not Applicable
08/27/2026 10 AM PDT 3.87 - Not Applicable
08/27/2026 11 AM PDT 3.18 - Not Applicable
08/27/2026 12 PM PDT 2.61 - Not Applicable
08/27/2026 01 PM PDT 2.45 - Not Applicable
08/27/2026 02 PM PDT 2.72 + Not Applicable
08/27/2026 03 PM PDT 3.44 + Not Applicable
08/27/2026 04 PM PDT 4.28 + Not Applicable
08/27/2026 05 PM PDT 5.07 + Not Applicable
08/27/2026 06 PM PDT 5.62 + Not Applicable
08/27/2026 07 PM PDT 5.84 + Not Applicable
08/27/2026 08 PM PDT 5.72 - Not Applicable
08/27/2026 09 PM PDT 5.37 - Not Applicable
08/27/2026 10 PM PDT 4.89 - Not Applicable
08/27/2026 11 PM PDT 4.42 - Not Applicable
08/28/2026 12 AM PDT 4.06 - Not Applicable
08/28/2026 01 AM PDT 3.98 - Not Applicable
08/28/2026 02 AM PDT 4.30 + Not Applicable
08/28/2026 03 AM PDT 4.93 + Not Applicable
08/28/2026 04 AM PDT 5.64 + Not Applicable
08/28/2026 05 AM PDT 6.21 + Not Applicable
08/28/2026 06 AM PDT 6.41 + Not Applicable
08/28/2026 07 AM PDT 6.20 - Not Applicable
08/28/2026 08 AM PDT 5.63 - Not Applicable
08/28/2026 09 AM PDT 4.86 - Not Applicable
08/28/2026 10 AM PDT 4.01 - Not Applicable
08/28/2026 11 AM PDT 3.25 - Not Applicable
08/28/2026 12 PM PDT 2.57 - Not Applicable
08/28/2026 01 PM PDT 2.36 - Not Applicable
08/28/2026 02 PM PDT 2.60 + Not Applicable
08/28/2026 03 PM PDT 3.31 + Not Applicable
08/28/2026 04 PM PDT 4.11 + Not Applicable
08/28/2026 05 PM PDT 4.90 + Not Applicable
08/28/2026 06 PM PDT 5.43 + Not Applicable
08/28/2026 07 PM PDT 5.63 + Not Applicable
08/28/2026 08 PM PDT 5.49 - Not Applicable
08/28/2026 09 PM PDT 5.08 - Not Applicable
08/28/2026 10 PM PDT 4.55 - Not Applicable
08/28/2026 11 PM PDT 4.00 - Not Applicable
08/29/2026 12 AM PDT 3.61 - Not Applicable
08/29/2026 01 AM PDT 3.47 - Not Applicable
08/29/2026 02 AM PDT 3.67 + Not Applicable
08/29/2026 03 AM PDT 4.21 + Not Applicable
08/29/2026 04 AM PDT 4.89 + Not Applicable
08/29/2026 05 AM PDT 5.53 + 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.
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