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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: | Apr 21 2026 at 7:21 AM PDT | Next Issuance: | Apr 22 2026 at 9:00 AM PDT
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| Action/Monitor: 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: 04/21/2026 at 07:23 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/21/2026 at 05:00 AM PDT
# Maximum Observed Stage: 8.09 Feet
# Maximum Observed Flow: 633 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/21/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 7.59 Feet
# Maximum Forecast Flow: 473 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/16/2026 07 AM PDT 5.41 51 Normal
04/16/2026 08 AM PDT 5.41 51 0 Normal
04/16/2026 09 AM PDT 5.42 52 + Normal
04/16/2026 10 AM PDT 5.43 53 + Normal
04/16/2026 11 AM PDT 5.44 54 + Normal
04/16/2026 12 PM PDT 5.44 54 0 Normal
04/16/2026 01 PM PDT 5.45 55 + Normal
04/16/2026 02 PM PDT 5.57 68 + Normal
04/16/2026 03 PM PDT 5.61 72 + Normal
04/16/2026 04 PM PDT 5.57 68 - Normal
04/16/2026 05 PM PDT 5.54 64 - Normal
04/16/2026 06 PM PDT 5.49 59 - Normal
04/16/2026 07 PM PDT 5.50 60 + Normal
04/16/2026 08 PM PDT 5.52 62 + Normal
04/16/2026 09 PM PDT 5.51 61 - Normal
04/16/2026 10 PM PDT 5.50 60 - Normal
04/16/2026 11 PM PDT 5.49 59 - Normal
04/17/2026 12 AM PDT 5.48 58 - Normal
04/17/2026 01 AM PDT 5.48 58 0 Normal
04/17/2026 02 AM PDT 5.48 58 0 Normal
04/17/2026 03 AM PDT 5.48 58 0 Normal
04/17/2026 04 AM PDT 5.49 59 + Normal
04/17/2026 05 AM PDT 5.49 59 0 Normal
04/17/2026 06 AM PDT 5.49 59 0 Normal
04/17/2026 07 AM PDT 5.49 59 0 Normal
04/17/2026 08 AM PDT 5.51 61 + Normal
04/17/2026 09 AM PDT 5.51 61 0 Normal
04/17/2026 10 AM PDT 5.50 60 - Normal
04/17/2026 11 AM PDT 5.49 59 - Normal
04/17/2026 12 PM PDT 5.50 60 + Normal
04/17/2026 01 PM PDT 5.50 60 0 Normal
04/17/2026 02 PM PDT 5.49 59 - Normal
04/17/2026 03 PM PDT 5.49 59 0 Normal
04/17/2026 04 PM PDT 5.49 59 0 Normal
04/17/2026 05 PM PDT 5.48 58 - Normal
04/17/2026 06 PM PDT 5.48 58 0 Normal
04/17/2026 07 PM PDT 5.48 58 0 Normal
04/17/2026 08 PM PDT 5.48 58 0 Normal
04/17/2026 09 PM PDT 5.47 57 - Normal
04/17/2026 10 PM PDT 5.48 58 + Normal
04/17/2026 11 PM PDT 5.48 58 0 Normal
04/18/2026 12 AM PDT 5.48 58 0 Normal
04/18/2026 01 AM PDT 5.48 58 0 Normal
04/18/2026 02 AM PDT 5.48 58 0 Normal
04/18/2026 03 AM PDT 5.48 58 0 Normal
04/18/2026 04 AM PDT 5.48 58 0 Normal
04/18/2026 05 AM PDT 5.48 58 0 Normal
04/18/2026 06 AM PDT 5.48 58 0 Normal
04/18/2026 07 AM PDT 5.49 59 + Normal
04/18/2026 08 AM PDT 5.51 61 + Normal
04/18/2026 09 AM PDT 5.50 60 - Normal
04/18/2026 10 AM PDT 5.50 60 0 Normal
04/18/2026 11 AM PDT 5.50 60 0 Normal
04/18/2026 12 PM PDT 5.49 59 - Normal
04/18/2026 01 PM PDT 5.50 60 + Normal
04/18/2026 02 PM PDT 5.50 60 0 Normal
04/18/2026 03 PM PDT 5.50 60 0 Normal
04/18/2026 04 PM PDT 5.49 59 - Normal
04/18/2026 05 PM PDT 5.49 59 0 Normal
04/18/2026 06 PM PDT 5.50 60 + Normal
04/18/2026 07 PM PDT 5.49 59 - Normal
04/18/2026 08 PM PDT 5.49 59 0 Normal
04/18/2026 09 PM PDT 5.49 59 0 Normal
04/18/2026 10 PM PDT 5.49 59 0 Normal
04/18/2026 11 PM PDT 5.49 59 0 Normal
04/19/2026 12 AM PDT 5.49 59 0 Normal
04/19/2026 01 AM PDT 5.49 59 0 Normal
04/19/2026 02 AM PDT 5.49 59 0 Normal
04/19/2026 03 AM PDT 5.49 59 0 Normal
04/19/2026 04 AM PDT 5.49 59 0 Normal
04/19/2026 05 AM PDT 5.49 59 0 Normal
04/19/2026 06 AM PDT 5.49 59 0 Normal
04/19/2026 07 AM PDT 5.49 59 0 Normal
04/19/2026 08 AM PDT 5.51 61 + Normal
04/19/2026 09 AM PDT 5.51 61 0 Normal
04/19/2026 10 AM PDT 5.50 60 - Normal
04/19/2026 11 AM PDT 5.51 61 + Normal
04/19/2026 12 PM PDT 5.51 61 0 Normal
04/19/2026 01 PM PDT 5.51 61 0 Normal
04/19/2026 02 PM PDT 5.51 61 0 Normal
04/19/2026 03 PM PDT 5.51 61 0 Normal
04/19/2026 04 PM PDT 5.51 61 0 Normal
04/19/2026 05 PM PDT 5.51 61 0 Normal
04/19/2026 06 PM PDT 5.51 61 0 Normal
04/19/2026 07 PM PDT 5.50 60 - Normal
04/19/2026 08 PM PDT 5.50 60 0 Normal
04/19/2026 09 PM PDT 5.49 59 - Normal
04/19/2026 10 PM PDT 5.49 59 0 Normal
04/19/2026 11 PM PDT 5.49 59 0 Normal
04/20/2026 12 AM PDT 5.49 59 0 Normal
04/20/2026 01 AM PDT 5.49 59 0 Normal
04/20/2026 02 AM PDT 5.49 59 0 Normal
04/20/2026 03 AM PDT 5.49 59 0 Normal
04/20/2026 04 AM PDT 5.49 59 0 Normal
04/20/2026 05 AM PDT 5.49 59 0 Normal
04/20/2026 06 AM PDT 5.49 59 0 Normal
04/20/2026 07 AM PDT 5.49 59 0 Normal
04/20/2026 08 AM PDT 5.48 58 - Normal
04/20/2026 09 AM PDT 5.49 59 + Normal
04/20/2026 10 AM PDT 5.50 60 + Normal
04/20/2026 11 AM PDT 5.50 60 0 Normal
04/20/2026 12 PM PDT 5.50 60 0 Normal
04/20/2026 01 PM PDT 5.49 59 - Normal
04/20/2026 02 PM PDT 5.50 60 + Normal
04/20/2026 03 PM PDT 5.51 61 + Normal
04/20/2026 04 PM PDT 5.51 61 0 Normal
04/20/2026 05 PM PDT 5.51 61 0 Normal
04/20/2026 06 PM PDT 5.60 71 + Normal
04/20/2026 07 PM PDT 5.67 79 + Normal
04/20/2026 08 PM PDT 5.70 83 + Normal
04/20/2026 09 PM PDT 5.61 72 - Normal
04/20/2026 10 PM PDT 5.87 104 + Normal
04/20/2026 11 PM PDT 6.47 201 + Normal
04/21/2026 12 AM PDT 7.12 345 + Normal
04/21/2026 01 AM PDT 7.33 400 + Normal
04/21/2026 02 AM PDT 7.51 450 + Normal
04/21/2026 03 AM PDT 7.72 513 + Normal
04/21/2026 04 AM PDT 7.99 599 + Normal
04/21/2026 05 AM PDT 8.09 633 + Normal
04/21/2026 06 AM PDT 7.84 550 - Normal
04/21/2026 07 AM PDT 7.72 513 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/21/2026 08 AM PDT 7.59 473 Normal
04/21/2026 09 AM PDT 7.46 436 - Normal
04/21/2026 10 AM PDT 7.23 373 - Normal
04/21/2026 11 AM PDT 6.92 296 - Normal
04/21/2026 12 PM PDT 6.65 237 - Normal
04/21/2026 01 PM PDT 6.58 222 - Normal
04/21/2026 02 PM PDT 6.62 230 + Normal
04/21/2026 03 PM PDT 6.76 260 + Normal
04/21/2026 04 PM PDT 6.96 306 + Normal
04/21/2026 05 PM PDT 7.08 335 + Normal
04/21/2026 06 PM PDT 7.10 340 + Normal
04/21/2026 07 PM PDT 7.03 323 - Normal
04/21/2026 08 PM PDT 6.89 289 - Normal
04/21/2026 09 PM PDT 6.70 247 - Normal
04/21/2026 10 PM PDT 6.50 206 - Normal
04/21/2026 11 PM PDT 6.30 170 - Normal
04/22/2026 12 AM PDT 6.14 144 - Normal
04/22/2026 01 AM PDT 6.03 127 - Normal
04/22/2026 02 AM PDT 5.94 114 - Normal
04/22/2026 03 AM PDT 5.86 103 - Normal
04/22/2026 04 AM PDT 5.77 91 - Normal
04/22/2026 05 AM PDT 5.69 81 - Normal
04/22/2026 06 AM PDT 5.62 73 - Normal
04/22/2026 07 AM PDT 5.58 69 - Normal
04/22/2026 08 AM PDT 5.55 65 - Normal
04/22/2026 09 AM PDT 5.54 64 - Normal
04/22/2026 10 AM PDT 5.51 61 - Normal
04/22/2026 11 AM PDT 5.47 57 - Normal
04/22/2026 12 PM PDT 5.43 53 - Normal
04/22/2026 01 PM PDT 5.40 50 - Normal
04/22/2026 02 PM PDT 5.46 56 + Normal
04/22/2026 03 PM PDT 5.62 73 + Normal
04/22/2026 04 PM PDT 5.74 88 + Normal
04/22/2026 05 PM PDT 5.76 90 + Normal
04/22/2026 06 PM PDT 5.73 86 - Normal
04/22/2026 07 PM PDT 5.65 77 - Normal
04/22/2026 08 PM PDT 5.55 65 - Normal
04/22/2026 09 PM PDT 5.46 56 - Normal
04/22/2026 10 PM PDT 5.38 48 - Normal
04/22/2026 11 PM PDT 5.33 44 - Normal
04/23/2026 12 AM PDT 5.28 39 - Normal
04/23/2026 01 AM PDT 5.25 37 - Normal
04/23/2026 02 AM PDT 5.23 35 - Normal
04/23/2026 03 AM PDT 5.21 34 - Normal
04/23/2026 04 AM PDT 5.20 33 - Normal
04/23/2026 05 AM PDT 5.19 32 - Normal
04/23/2026 06 AM PDT 5.18 31 - Normal
04/23/2026 07 AM PDT 5.18 31 0 Normal
04/23/2026 08 AM PDT 5.18 31 0 Normal
04/23/2026 09 AM PDT 5.17 30 - Normal
04/23/2026 10 AM PDT 5.17 30 0 Normal
04/23/2026 11 AM PDT 5.17 30 0 Normal
04/23/2026 12 PM PDT 5.17 30 0 Normal
04/23/2026 01 PM PDT 5.16 30 - Normal
04/23/2026 02 PM PDT 5.16 30 0 Normal
04/23/2026 03 PM PDT 5.16 30 0 Normal
04/23/2026 04 PM PDT 5.16 30 0 Normal
04/23/2026 05 PM PDT 5.16 30 0 Normal
04/23/2026 06 PM PDT 5.16 30 0 Normal
04/23/2026 07 PM PDT 5.15 29 - Normal
04/23/2026 08 PM PDT 5.15 29 0 Normal
04/23/2026 09 PM PDT 5.15 29 0 Normal
04/23/2026 10 PM PDT 5.15 29 0 Normal
04/23/2026 11 PM PDT 5.15 29 0 Normal
04/24/2026 12 AM PDT 5.15 29 0 Normal
04/24/2026 01 AM PDT 5.15 29 0 Normal
04/24/2026 02 AM PDT 5.14 28 - Normal
04/24/2026 03 AM PDT 5.14 28 0 Normal
04/24/2026 04 AM PDT 5.14 28 0 Normal
04/24/2026 05 AM PDT 5.14 28 0 Normal
04/24/2026 06 AM PDT 5.14 28 0 Normal
04/24/2026 07 AM PDT 5.14 28 0 Normal
04/24/2026 08 AM PDT 5.14 28 0 Normal
04/24/2026 09 AM PDT 5.14 28 0 Normal
04/24/2026 10 AM PDT 5.14 28 0 Normal
04/24/2026 11 AM PDT 5.14 28 0 Normal
04/24/2026 12 PM PDT 5.14 28 0 Normal
04/24/2026 01 PM PDT 5.14 28 0 Normal
04/24/2026 02 PM PDT 5.14 28 0 Normal
04/24/2026 03 PM PDT 5.14 28 0 Normal
04/24/2026 04 PM PDT 5.14 28 0 Normal
04/24/2026 05 PM PDT 5.14 28 0 Normal
04/24/2026 06 PM PDT 5.14 28 0 Normal
04/24/2026 07 PM PDT 5.13 27 - Normal
04/24/2026 08 PM PDT 5.13 27 0 Normal
04/24/2026 09 PM PDT 5.13 27 0 Normal
04/24/2026 10 PM PDT 5.13 27 0 Normal
04/24/2026 11 PM PDT 5.13 27 0 Normal
04/25/2026 12 AM PDT 5.13 27 0 Normal
04/25/2026 01 AM PDT 5.13 27 0 Normal
04/25/2026 02 AM PDT 5.13 27 0 Normal
04/25/2026 03 AM PDT 5.13 27 0 Normal
04/25/2026 04 AM PDT 5.13 27 0 Normal
04/25/2026 05 AM PDT 5.13 27 0 Normal
04/25/2026 06 AM PDT 5.13 27 0 Normal
04/25/2026 07 AM PDT 5.13 27 0 Normal
04/25/2026 08 AM PDT 5.13 27 0 Normal
04/25/2026 09 AM PDT 5.13 27 0 Normal
04/25/2026 10 AM PDT 5.13 27 0 Normal
04/25/2026 11 AM PDT 5.13 27 0 Normal
04/25/2026 12 PM PDT 5.13 27 0 Normal
04/25/2026 01 PM PDT 5.13 27 0 Normal
04/25/2026 02 PM PDT 5.13 27 0 Normal
04/25/2026 03 PM PDT 5.13 27 0 Normal
04/25/2026 04 PM PDT 5.13 27 0 Normal
04/25/2026 05 PM PDT 5.13 27 0 Normal
04/25/2026 06 PM PDT 5.13 27 0 Normal
04/25/2026 07 PM PDT 5.13 27 0 Normal
04/25/2026 08 PM PDT 5.13 27 0 Normal
04/25/2026 09 PM PDT 5.13 27 0 Normal
04/25/2026 10 PM PDT 5.13 27 0 Normal
04/25/2026 11 PM PDT 5.12 27 - Normal
04/26/2026 12 AM PDT 5.12 27 0 Normal
04/26/2026 01 AM PDT 5.12 27 0 Normal
04/26/2026 02 AM PDT 5.12 27 0 Normal
04/26/2026 03 AM PDT 5.12 27 0 Normal
04/26/2026 04 AM PDT 5.12 27 0 Normal
04/26/2026 05 AM PDT 5.12 27 0 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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