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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: | Oct 17 2026 at 7:06 AM PDT | Next Issuance: | Oct 18 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: 10/17/2026 at 07:07 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 10/12/2026 at 07:00 PM PDT
# Maximum Observed Stage: 7.17 Feet
#
# Earliest Date & Time of Maximum Forecast: 10/17/2026 at 10:00 PM PDT
# Maximum Forecast Stage: 6.98 Feet
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Trend Observed Status
# ------------------------------------------------------------------
10/12/2026 07 AM PDT 6.36 Not Applicable
10/12/2026 08 AM PDT 6.53 + Not Applicable
10/12/2026 09 AM PDT 6.30 - Not Applicable
10/12/2026 10 AM PDT 5.62 - Not Applicable
10/12/2026 11 AM PDT 5.03 - Not Applicable
10/12/2026 12 PM PDT 4.74 - Not Applicable
10/12/2026 01 PM PDT 4.45 - Not Applicable
10/12/2026 02 PM PDT 4.52 + Not Applicable
10/12/2026 03 PM PDT 5.40 + Not Applicable
10/12/2026 04 PM PDT 6.19 + Not Applicable
10/12/2026 05 PM PDT 6.54 + Not Applicable
10/12/2026 06 PM PDT 6.90 + Not Applicable
10/12/2026 07 PM PDT 7.17 + Not Applicable
10/12/2026 08 PM PDT 7.05 - Not Applicable
10/12/2026 09 PM PDT 6.34 - Not Applicable
10/12/2026 10 PM PDT 5.65 - Not Applicable
10/12/2026 11 PM PDT 5.25 - Not Applicable
10/13/2026 12 AM PDT 4.79 - Not Applicable
10/13/2026 01 AM PDT 4.27 - Not Applicable
10/13/2026 02 AM PDT 3.78 - Not Applicable
10/13/2026 03 AM PDT 3.47 - Not Applicable
10/13/2026 04 AM PDT 3.73 + Not Applicable
10/13/2026 05 AM PDT 4.73 + Not Applicable
10/13/2026 06 AM PDT 5.42 + Not Applicable
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 3.19 - Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Trend Forecast Status
# ------------------------------------------------------------------
10/17/2026 07 AM PDT 3.35 Not Applicable
10/17/2026 08 AM PDT 3.83 + Not Applicable
10/17/2026 09 AM PDT 4.42 + Not Applicable
10/17/2026 10 AM PDT 5.10 + Not Applicable
10/17/2026 11 AM PDT 5.64 + Not Applicable
10/17/2026 12 PM PDT 6.03 + Not Applicable
10/17/2026 01 PM PDT 6.16 + Not Applicable
10/17/2026 02 PM PDT 6.08 - Not Applicable
10/17/2026 03 PM PDT 5.93 - Not Applicable
10/17/2026 04 PM PDT 5.86 - Not Applicable
10/17/2026 05 PM PDT 5.95 + Not Applicable
10/17/2026 06 PM PDT 6.16 + Not Applicable
10/17/2026 07 PM PDT 6.43 + Not Applicable
10/17/2026 08 PM PDT 6.72 + Not Applicable
10/17/2026 09 PM PDT 6.92 + Not Applicable
10/17/2026 10 PM PDT 6.98 + Not Applicable
10/17/2026 11 PM PDT 6.84 - Not Applicable
10/18/2026 12 AM PDT 6.50 - Not Applicable
10/18/2026 01 AM PDT 6.01 - Not Applicable
10/18/2026 02 AM PDT 5.39 - Not Applicable
10/18/2026 03 AM PDT 4.78 - Not Applicable
10/18/2026 04 AM PDT 4.17 - Not Applicable
10/18/2026 05 AM PDT 3.70 - Not Applicable
10/18/2026 06 AM PDT 3.32 - Not Applicable
10/18/2026 07 AM PDT 3.21 - Not Applicable
10/18/2026 08 AM PDT 3.41 + Not Applicable
10/18/2026 09 AM PDT 3.89 + Not Applicable
10/18/2026 10 AM PDT 4.53 + Not Applicable
10/18/2026 11 AM PDT 5.22 + Not Applicable
10/18/2026 12 PM PDT 5.81 + Not Applicable
10/18/2026 01 PM PDT 6.21 + Not Applicable
10/18/2026 02 PM PDT 6.34 + Not Applicable
10/18/2026 03 PM PDT 6.21 - Not Applicable
10/18/2026 04 PM PDT 6.00 - Not Applicable
10/18/2026 05 PM PDT 5.88 - Not Applicable
10/18/2026 06 PM PDT 5.93 + Not Applicable
10/18/2026 07 PM PDT 6.08 + Not Applicable
10/18/2026 08 PM PDT 6.29 + Not Applicable
10/18/2026 09 PM PDT 6.51 + Not Applicable
10/18/2026 10 PM PDT 6.67 + Not Applicable
10/18/2026 11 PM PDT 6.69 + Not Applicable
10/19/2026 12 AM PDT 6.51 - Not Applicable
10/19/2026 01 AM PDT 6.12 - Not Applicable
10/19/2026 02 AM PDT 5.55 - Not Applicable
10/19/2026 03 AM PDT 4.91 - Not Applicable
10/19/2026 04 AM PDT 4.25 - Not Applicable
10/19/2026 05 AM PDT 3.72 - Not Applicable
10/19/2026 06 AM PDT 3.29 - Not Applicable
10/19/2026 07 AM PDT 3.13 - Not Applicable
10/19/2026 08 AM PDT 3.27 + Not Applicable
10/19/2026 09 AM PDT 3.67 + Not Applicable
10/19/2026 10 AM PDT 4.23 + Not Applicable
10/19/2026 11 AM PDT 4.90 + Not Applicable
10/19/2026 12 PM PDT 5.50 + Not Applicable
10/19/2026 01 PM PDT 6.02 + Not Applicable
10/19/2026 02 PM PDT 6.37 + Not Applicable
10/19/2026 03 PM PDT 6.48 + Not Applicable
10/19/2026 04 PM PDT 6.34 - Not Applicable
10/19/2026 05 PM PDT 6.06 - Not Applicable
10/19/2026 06 PM PDT 5.80 - Not Applicable
10/19/2026 07 PM PDT 5.68 - Not Applicable
10/19/2026 08 PM PDT 5.72 + Not Applicable
10/19/2026 09 PM PDT 5.88 + Not Applicable
10/19/2026 10 PM PDT 6.09 + Not Applicable
10/19/2026 11 PM PDT 6.30 + Not Applicable
10/20/2026 12 AM PDT 6.45 + Not Applicable
10/20/2026 01 AM PDT 6.48 + Not Applicable
10/20/2026 02 AM PDT 6.30 - Not Applicable
10/20/2026 03 AM PDT 5.91 - Not Applicable
10/20/2026 04 AM PDT 5.33 - Not Applicable
10/20/2026 05 AM PDT 4.70 - Not Applicable
10/20/2026 06 AM PDT 4.04 - Not Applicable
10/20/2026 07 AM PDT 3.50 - Not Applicable
10/20/2026 08 AM PDT 3.07 - Not Applicable
10/20/2026 09 AM PDT 2.95 - Not Applicable
10/20/2026 10 AM PDT 3.21 + Not Applicable
10/20/2026 11 AM PDT 3.82 + Not Applicable
10/20/2026 12 PM PDT 4.62 + Not Applicable
10/20/2026 01 PM PDT 5.31 + Not Applicable
10/20/2026 02 PM PDT 5.83 + Not Applicable
10/20/2026 03 PM PDT 6.01 + Not Applicable
10/20/2026 04 PM PDT 5.86 - Not Applicable
10/20/2026 05 PM PDT 5.47 - Not Applicable
10/20/2026 06 PM PDT 5.01 - Not Applicable
10/20/2026 07 PM PDT 4.65 - Not Applicable
10/20/2026 08 PM PDT 4.49 - Not Applicable
10/20/2026 09 PM PDT 4.56 + Not Applicable
10/20/2026 10 PM PDT 4.78 + Not Applicable
10/20/2026 11 PM PDT 5.08 + Not Applicable
10/21/2026 12 AM PDT 5.38 + Not Applicable
10/21/2026 01 AM PDT 5.59 + Not Applicable
10/21/2026 02 AM PDT 5.64 + Not Applicable
10/21/2026 03 AM PDT 5.43 - Not Applicable
10/21/2026 04 AM PDT 4.97 - Not Applicable
10/21/2026 05 AM PDT 4.34 - Not Applicable
10/21/2026 06 AM PDT 3.66 - Not Applicable
10/21/2026 07 AM PDT 3.01 - Not Applicable
10/21/2026 08 AM PDT 2.50 - Not Applicable
10/21/2026 09 AM PDT 2.33 - Not Applicable
10/21/2026 10 AM PDT 2.49 + Not Applicable
10/21/2026 11 AM PDT 3.00 + Not Applicable
10/21/2026 12 PM PDT 3.69 + Not Applicable
10/21/2026 01 PM PDT 4.42 + Not Applicable
10/21/2026 02 PM PDT 5.02 + Not Applicable
10/21/2026 03 PM PDT 5.43 + Not Applicable
10/21/2026 04 PM PDT 5.56 + Not Applicable
10/21/2026 05 PM PDT 5.39 - Not Applicable
10/21/2026 06 PM PDT 4.96 - Not Applicable
10/21/2026 07 PM PDT 4.41 - Not Applicable
10/21/2026 08 PM PDT 3.84 - Not Applicable
10/21/2026 09 PM PDT 3.43 - Not Applicable
10/21/2026 10 PM PDT 3.28 - Not Applicable
10/21/2026 11 PM PDT 3.47 + Not Applicable
10/22/2026 12 AM PDT 3.98 + Not Applicable
10/22/2026 01 AM PDT 4.59 + Not Applicable
10/22/2026 02 AM PDT 5.01 + Not Applicable
10/22/2026 03 AM PDT 5.16 + Not Applicable
10/22/2026 04 AM PDT 5.01 - Not Applicable
10/22/2026 05 AM PDT 4.62 - 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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