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GUADALUPE RIVER - SAN JOSE AT US HIGHWAY 101 (GSJC1)
| Latitude: 37.37º N | Longitude: 121.93º W | Elevation: 72 Feet | | Forecast Type: Unofficial Location |
| Location: Santa Clara County in California | Bulletin Group: Central Coast | River Group: South Bay |
| Issuance Time: | Oct 18 2026 at 7:22 AM PDT | Next Issuance: | Oct 19 2026 at 9:00 AM PDT
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| Action: 17.0 Feet | Minor Flood: 18.5 Feet | Moderate Flood: 19.5 Feet | Major Flood: 21.0 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Guadalupe River - San Jose at US Highway 101 (GSJC1)
#
# File Generation Time: 10/18/2026 at 07:23 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 10/17/2026 at 01:00 PM PDT
# Maximum Observed Stage: 5.13 Feet
# Maximum Observed Flow: 24 cfs
#
# Earliest Date & Time of Maximum Forecast: 10/21/2026 at 09:00 PM PDT
# Maximum Forecast Stage: 5.80 Feet
# Maximum Forecast Flow: 88 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
10/13/2026 07 AM PDT 5.13 24 Normal
10/13/2026 08 AM PDT 5.12 23 - Normal
10/13/2026 09 AM PDT 5.12 23 0 Normal
10/13/2026 10 AM PDT 5.13 24 + Normal
10/13/2026 11 AM PDT 5.13 24 0 Normal
10/13/2026 12 PM PDT 5.12 23 - Normal
10/13/2026 01 PM PDT 5.12 23 0 Normal
10/13/2026 02 PM PDT 5.12 23 0 Normal
10/13/2026 03 PM PDT 5.11 23 - Normal
10/13/2026 04 PM PDT 5.11 23 0 Normal
10/13/2026 05 PM PDT 5.11 23 0 Normal
10/13/2026 06 PM PDT 5.11 23 0 Normal
10/13/2026 07 PM PDT 5.11 23 0 Normal
10/13/2026 08 PM PDT 5.11 23 0 Normal
10/13/2026 09 PM PDT 5.11 23 0 Normal
10/13/2026 10 PM PDT 5.11 23 0 Normal
10/13/2026 11 PM PDT 5.11 23 0 Normal
10/14/2026 12 AM PDT 5.11 23 0 Normal
10/14/2026 01 AM PDT 5.11 23 0 Normal
10/14/2026 02 AM PDT 5.10 22 - Normal
10/14/2026 03 AM PDT 5.11 23 + Normal
10/14/2026 04 AM PDT 5.11 23 0 Normal
10/14/2026 05 AM PDT 5.11 23 0 Normal
10/14/2026 06 AM PDT 5.12 23 + Normal
10/14/2026 07 AM PDT 5.11 23 - Normal
10/14/2026 08 AM PDT 5.11 23 0 Normal
10/14/2026 09 AM PDT 5.12 23 + Normal
10/14/2026 10 AM PDT 5.12 23 0 Normal
10/14/2026 11 AM PDT 5.12 23 0 Normal
10/14/2026 12 PM PDT 5.12 23 0 Normal
10/14/2026 01 PM PDT 5.11 23 - Normal
10/14/2026 02 PM PDT 5.12 23 + Normal
10/14/2026 03 PM PDT 5.13 24 + Normal
10/14/2026 04 PM PDT 5.11 23 - Normal
10/14/2026 05 PM PDT 5.10 22 - Normal
10/14/2026 06 PM PDT 5.11 23 + Normal
10/14/2026 07 PM PDT 5.12 23 + Normal
10/14/2026 08 PM PDT 5.12 23 0 Normal
10/14/2026 09 PM PDT 5.12 23 0 Normal
10/14/2026 10 PM PDT 5.12 23 0 Normal
10/14/2026 11 PM PDT 5.11 23 - Normal
10/15/2026 12 AM PDT 5.11 23 0 Normal
10/15/2026 01 AM PDT 5.11 23 0 Normal
10/15/2026 02 AM PDT 5.11 23 0 Normal
10/15/2026 03 AM PDT 5.11 23 0 Normal
10/15/2026 04 AM PDT 5.12 23 + Normal
10/15/2026 05 AM PDT 5.11 23 - Normal
10/15/2026 06 AM PDT 5.11 23 0 Normal
10/15/2026 07 AM PDT 5.11 23 0 Normal
10/15/2026 08 AM PDT 5.12 23 + Normal
10/15/2026 09 AM PDT 5.12 23 0 Normal
10/15/2026 10 AM PDT 5.12 23 0 Normal
10/15/2026 11 AM PDT 5.11 23 - Normal
10/15/2026 12 PM PDT 5.12 23 + Normal
10/15/2026 01 PM PDT 5.12 23 0 Normal
10/15/2026 02 PM PDT 5.12 23 0 Normal
10/15/2026 03 PM PDT 5.12 23 0 Normal
10/15/2026 04 PM PDT 5.12 23 0 Normal
10/15/2026 05 PM PDT 5.11 23 - Normal
10/15/2026 06 PM PDT 5.11 23 0 Normal
10/15/2026 07 PM PDT 5.11 23 0 Normal
10/15/2026 08 PM PDT 5.10 22 - Normal
10/15/2026 09 PM PDT 5.11 23 + Normal
10/15/2026 10 PM PDT 5.10 22 - Normal
10/15/2026 11 PM PDT 5.10 22 0 Normal
10/16/2026 12 AM PDT 5.10 22 0 Normal
10/16/2026 01 AM PDT 5.10 22 0 Normal
10/16/2026 02 AM PDT 5.10 22 0 Normal
10/16/2026 03 AM PDT 5.11 23 + Normal
10/16/2026 04 AM PDT 5.10 22 - Normal
10/16/2026 05 AM PDT 5.11 23 + Normal
10/16/2026 06 AM PDT 5.11 23 0 Normal
10/16/2026 07 AM PDT 5.11 23 0 Normal
10/16/2026 08 AM PDT 5.11 23 0 Normal
10/16/2026 09 AM PDT 5.12 23 + Normal
10/16/2026 10 AM PDT 5.13 24 + Normal
10/16/2026 11 AM PDT 5.13 24 0 Normal
10/16/2026 12 PM PDT 5.13 24 0 Normal
10/16/2026 01 PM PDT 5.13 24 0 Normal
10/16/2026 02 PM PDT 5.12 23 - Normal
10/16/2026 03 PM PDT 5.12 23 0 Normal
10/16/2026 04 PM PDT 5.11 23 - Normal
10/16/2026 05 PM PDT 5.11 23 0 Normal
10/16/2026 06 PM PDT 5.10 22 - Normal
10/16/2026 07 PM PDT 5.09 21 - Normal
10/16/2026 08 PM PDT 5.08 21 - Normal
10/16/2026 09 PM PDT 5.09 21 + Normal
10/16/2026 10 PM PDT 5.09 21 0 Normal
10/16/2026 11 PM PDT 5.08 21 - Normal
10/17/2026 12 AM PDT 5.09 21 + Normal
10/17/2026 01 AM PDT 5.08 21 - Normal
10/17/2026 02 AM PDT 5.09 21 + Normal
10/17/2026 03 AM PDT 5.08 21 - Normal
10/17/2026 04 AM PDT 5.08 21 0 Normal
10/17/2026 05 AM PDT 5.08 21 0 Normal
10/17/2026 06 AM PDT 5.09 21 + Normal
10/17/2026 07 AM PDT 5.09 21 0 Normal
10/17/2026 08 AM PDT 5.09 21 0 Normal
10/17/2026 09 AM PDT 5.09 21 0 Normal
10/17/2026 10 AM PDT 5.10 22 + Normal
10/17/2026 11 AM PDT 5.12 23 + Normal
10/17/2026 12 PM PDT 5.13 24 + Normal
10/17/2026 01 PM PDT 5.13 24 0 Normal
10/17/2026 02 PM PDT 5.12 23 - Normal
10/17/2026 03 PM PDT 5.12 23 0 Normal
10/17/2026 04 PM PDT 5.12 23 0 Normal
10/17/2026 05 PM PDT 5.12 23 0 Normal
10/17/2026 06 PM PDT 5.12 23 0 Normal
10/17/2026 07 PM PDT 5.12 23 0 Normal
10/17/2026 08 PM PDT 5.11 23 - Normal
10/17/2026 09 PM PDT 5.11 23 0 Normal
10/17/2026 10 PM PDT 5.09 21 - Normal
10/17/2026 11 PM PDT 5.09 21 0 Normal
10/18/2026 12 AM PDT 5.08 21 - Normal
10/18/2026 01 AM PDT 5.08 21 0 Normal
10/18/2026 02 AM PDT 5.08 21 0 Normal
10/18/2026 03 AM PDT 5.08 21 0 Normal
10/18/2026 04 AM PDT 5.08 21 0 Normal
10/18/2026 05 AM PDT 5.08 21 0 Normal
10/18/2026 06 AM PDT 5.08 21 0 Normal
10/18/2026 07 AM PDT 5.08 21 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
10/18/2026 08 AM PDT 5.08 21 Normal
10/18/2026 09 AM PDT 5.08 21 0 Normal
10/18/2026 10 AM PDT 5.08 21 0 Normal
10/18/2026 11 AM PDT 5.08 21 0 Normal
10/18/2026 12 PM PDT 5.08 21 0 Normal
10/18/2026 01 PM PDT 5.08 21 0 Normal
10/18/2026 02 PM PDT 5.08 21 0 Normal
10/18/2026 03 PM PDT 5.08 21 0 Normal
10/18/2026 04 PM PDT 5.08 21 0 Normal
10/18/2026 05 PM PDT 5.08 21 0 Normal
10/18/2026 06 PM PDT 5.09 21 + Normal
10/18/2026 07 PM PDT 5.09 21 0 Normal
10/18/2026 08 PM PDT 5.09 21 0 Normal
10/18/2026 09 PM PDT 5.09 21 0 Normal
10/18/2026 10 PM PDT 5.09 21 0 Normal
10/18/2026 11 PM PDT 5.09 21 0 Normal
10/19/2026 12 AM PDT 5.09 21 0 Normal
10/19/2026 01 AM PDT 5.09 21 0 Normal
10/19/2026 02 AM PDT 5.09 21 0 Normal
10/19/2026 03 AM PDT 5.09 21 0 Normal
10/19/2026 04 AM PDT 5.09 21 0 Normal
10/19/2026 05 AM PDT 5.09 21 0 Normal
10/19/2026 06 AM PDT 5.09 21 0 Normal
10/19/2026 07 AM PDT 5.09 21 0 Normal
10/19/2026 08 AM PDT 5.09 21 0 Normal
10/19/2026 09 AM PDT 5.09 21 0 Normal
10/19/2026 10 AM PDT 5.09 21 0 Normal
10/19/2026 11 AM PDT 5.09 21 0 Normal
10/19/2026 12 PM PDT 5.09 21 0 Normal
10/19/2026 01 PM PDT 5.08 21 - Normal
10/19/2026 02 PM PDT 5.08 21 0 Normal
10/19/2026 03 PM PDT 5.08 21 0 Normal
10/19/2026 04 PM PDT 5.08 21 0 Normal
10/19/2026 05 PM PDT 5.08 21 0 Normal
10/19/2026 06 PM PDT 5.09 21 + Normal
10/19/2026 07 PM PDT 5.09 21 0 Normal
10/19/2026 08 PM PDT 5.09 21 0 Normal
10/19/2026 09 PM PDT 5.09 21 0 Normal
10/19/2026 10 PM PDT 5.09 21 0 Normal
10/19/2026 11 PM PDT 5.09 21 0 Normal
10/20/2026 12 AM PDT 5.09 21 0 Normal
10/20/2026 01 AM PDT 5.09 21 0 Normal
10/20/2026 02 AM PDT 5.09 21 0 Normal
10/20/2026 03 AM PDT 5.09 21 0 Normal
10/20/2026 04 AM PDT 5.09 21 0 Normal
10/20/2026 05 AM PDT 5.09 21 0 Normal
10/20/2026 06 AM PDT 5.09 21 0 Normal
10/20/2026 07 AM PDT 5.09 21 0 Normal
10/20/2026 08 AM PDT 5.09 21 0 Normal
10/20/2026 09 AM PDT 5.10 22 + Normal
10/20/2026 10 AM PDT 5.14 25 + Normal
10/20/2026 11 AM PDT 5.18 27 + Normal
10/20/2026 12 PM PDT 5.23 31 + Normal
10/20/2026 01 PM PDT 5.27 34 + Normal
10/20/2026 02 PM PDT 5.30 37 + Normal
10/20/2026 03 PM PDT 5.30 37 0 Normal
10/20/2026 04 PM PDT 5.29 36 - Normal
10/20/2026 05 PM PDT 5.25 33 - Normal
10/20/2026 06 PM PDT 5.21 30 - Normal
10/20/2026 07 PM PDT 5.18 27 - Normal
10/20/2026 08 PM PDT 5.15 25 - Normal
10/20/2026 09 PM PDT 5.13 24 - Normal
10/20/2026 10 PM PDT 5.12 23 - Normal
10/20/2026 11 PM PDT 5.11 23 - Normal
10/21/2026 12 AM PDT 5.10 22 - Normal
10/21/2026 01 AM PDT 5.10 22 0 Normal
10/21/2026 02 AM PDT 5.10 22 0 Normal
10/21/2026 03 AM PDT 5.14 25 + Normal
10/21/2026 04 AM PDT 5.24 32 + Normal
10/21/2026 05 AM PDT 5.37 43 + Normal
10/21/2026 06 AM PDT 5.49 54 + Normal
10/21/2026 07 AM PDT 5.58 63 + Normal
10/21/2026 08 AM PDT 5.63 68 + Normal
10/21/2026 09 AM PDT 5.66 72 + Normal
10/21/2026 10 AM PDT 5.63 68 - Normal
10/21/2026 11 AM PDT 5.58 63 - Normal
10/21/2026 12 PM PDT 5.52 57 - Normal
10/21/2026 01 PM PDT 5.47 52 - Normal
10/21/2026 02 PM PDT 5.44 49 - Normal
10/21/2026 03 PM PDT 5.44 49 0 Normal
10/21/2026 04 PM PDT 5.50 55 + Normal
10/21/2026 05 PM PDT 5.59 64 + Normal
10/21/2026 06 PM PDT 5.67 73 + Normal
10/21/2026 07 PM PDT 5.74 81 + Normal
10/21/2026 08 PM PDT 5.79 87 + Normal
10/21/2026 09 PM PDT 5.80 88 + Normal
10/21/2026 10 PM PDT 5.80 88 0 Normal
10/21/2026 11 PM PDT 5.77 85 - Normal
10/22/2026 12 AM PDT 5.73 80 - Normal
10/22/2026 01 AM PDT 5.70 76 - Normal
10/22/2026 02 AM PDT 5.68 74 - Normal
10/22/2026 03 AM PDT 5.66 72 - Normal
10/22/2026 04 AM PDT 5.62 67 - Normal
10/22/2026 05 AM PDT 5.56 61 - Normal
10/22/2026 06 AM PDT 5.51 56 - Normal
10/22/2026 07 AM PDT 5.46 51 - Normal
10/22/2026 08 AM PDT 5.42 47 - Normal
10/22/2026 09 AM PDT 5.39 44 - Normal
10/22/2026 10 AM PDT 5.35 41 - Normal
10/22/2026 11 AM PDT 5.31 38 - Normal
10/22/2026 12 PM PDT 5.28 35 - Normal
10/22/2026 01 PM PDT 5.25 33 - Normal
10/22/2026 02 PM PDT 5.22 30 - Normal
10/22/2026 03 PM PDT 5.22 30 0 Normal
10/22/2026 04 PM PDT 5.23 31 + Normal
10/22/2026 05 PM PDT 5.26 34 + Normal
10/22/2026 06 PM PDT 5.29 36 + Normal
10/22/2026 07 PM PDT 5.32 38 + Normal
10/22/2026 08 PM PDT 5.34 40 + Normal
10/22/2026 09 PM PDT 5.34 40 0 Normal
10/22/2026 10 PM PDT 5.32 38 - Normal
10/22/2026 11 PM PDT 5.29 36 - Normal
10/23/2026 12 AM PDT 5.25 33 - Normal
10/23/2026 01 AM PDT 5.20 29 - Normal
10/23/2026 02 AM PDT 5.17 27 - Normal
10/23/2026 03 AM PDT 5.15 25 - Normal
10/23/2026 04 AM PDT 5.13 24 - Normal
10/23/2026 05 AM PDT 5.12 23 - Normal
#
# NOTE 1: Stages are rounded to the nearest hundredth (.01) of a foot.
# NOTE 2: Flows are rounded to the nearest (1) cfs.
# NOTE 3: Trends are determined using hourly change in unrounded stage and flow.
# NOTE 4: Maximum Values are determined using unrounded stage and flow.
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