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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 18 2026 at 8:49 AM PDT | Next Issuance: | Apr 19 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: 04/18/2026 at 08:51 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/16/2026 at 03:00 PM PDT
# Maximum Observed Stage: 5.61 Feet
# Maximum Observed Flow: 72 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/21/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 7.47 Feet
# Maximum Forecast Flow: 439 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/13/2026 08 AM PDT 5.53 63 Normal
04/13/2026 09 AM PDT 5.52 62 - Normal
04/13/2026 10 AM PDT 5.52 62 0 Normal
04/13/2026 11 AM PDT 5.52 62 0 Normal
04/13/2026 12 PM PDT 5.50 60 - Normal
04/13/2026 01 PM PDT 5.50 60 0 Normal
04/13/2026 02 PM PDT 5.50 60 0 Normal
04/13/2026 03 PM PDT 5.49 59 - Normal
04/13/2026 04 PM PDT 5.48 58 - Normal
04/13/2026 05 PM PDT 5.47 57 - Normal
04/13/2026 06 PM PDT 5.47 57 0 Normal
04/13/2026 07 PM PDT 5.46 56 - Normal
04/13/2026 08 PM PDT 5.46 56 0 Normal
04/13/2026 09 PM PDT 5.46 56 0 Normal
04/13/2026 10 PM PDT 5.45 55 - Normal
04/13/2026 11 PM PDT 5.45 55 0 Normal
04/14/2026 12 AM PDT 5.45 55 0 Normal
04/14/2026 01 AM PDT 5.45 55 0 Normal
04/14/2026 02 AM PDT 5.45 55 0 Normal
04/14/2026 03 AM PDT 5.44 54 - Normal
04/14/2026 04 AM PDT 5.44 54 0 Normal
04/14/2026 05 AM PDT 5.44 54 0 Normal
04/14/2026 06 AM PDT 5.44 54 0 Normal
04/14/2026 07 AM PDT 5.44 54 0 Normal
04/14/2026 08 AM PDT 5.44 54 0 Normal
04/14/2026 09 AM PDT 5.44 54 0 Normal
04/14/2026 10 AM PDT 5.46 56 + Normal
04/14/2026 11 AM PDT 5.45 55 - Normal
04/14/2026 12 PM PDT 5.43 53 - Normal
04/14/2026 01 PM PDT 5.43 53 0 Normal
04/14/2026 02 PM PDT 5.43 53 0 Normal
04/14/2026 03 PM PDT 5.43 53 0 Normal
04/14/2026 04 PM PDT 5.44 54 + Normal
04/14/2026 05 PM PDT 5.42 52 - Normal
04/14/2026 06 PM PDT 5.41 51 - Normal
04/14/2026 07 PM PDT 5.41 51 0 Normal
04/14/2026 08 PM PDT 5.41 51 0 Normal
04/14/2026 09 PM PDT 5.41 51 0 Normal
04/14/2026 10 PM PDT 5.41 51 0 Normal
04/14/2026 11 PM PDT 5.41 51 0 Normal
04/15/2026 12 AM PDT 5.41 51 0 Normal
04/15/2026 01 AM PDT 5.41 51 0 Normal
04/15/2026 02 AM PDT 5.41 51 0 Normal
04/15/2026 03 AM PDT 5.41 51 0 Normal
04/15/2026 04 AM PDT 5.41 51 0 Normal
04/15/2026 05 AM PDT 5.41 51 0 Normal
04/15/2026 06 AM PDT 5.42 52 + Normal
04/15/2026 07 AM PDT 5.41 51 - Normal
04/15/2026 08 AM PDT 5.42 52 + Normal
04/15/2026 09 AM PDT 5.42 52 0 Normal
04/15/2026 10 AM PDT 5.42 52 0 Normal
04/15/2026 11 AM PDT 5.42 52 0 Normal
04/15/2026 12 PM PDT 5.41 51 - Normal
04/15/2026 01 PM PDT 5.41 51 0 Normal
04/15/2026 02 PM PDT 5.41 51 0 Normal
04/15/2026 03 PM PDT 5.41 51 0 Normal
04/15/2026 04 PM PDT 5.41 51 0 Normal
04/15/2026 05 PM PDT 5.40 50 - Normal
04/15/2026 06 PM PDT 5.40 50 0 Normal
04/15/2026 07 PM PDT 5.41 51 + Normal
04/15/2026 08 PM PDT 5.40 50 - Normal
04/15/2026 09 PM PDT 5.40 50 0 Normal
04/15/2026 10 PM PDT 5.40 50 0 Normal
04/15/2026 11 PM PDT 5.40 50 0 Normal
04/16/2026 12 AM PDT 5.40 50 0 Normal
04/16/2026 01 AM PDT 5.40 50 0 Normal
04/16/2026 02 AM PDT 5.40 50 0 Normal
04/16/2026 03 AM PDT 5.40 50 0 Normal
04/16/2026 04 AM PDT 5.40 50 0 Normal
04/16/2026 05 AM PDT 5.40 50 0 Normal
04/16/2026 06 AM PDT 5.40 50 0 Normal
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 5.48 58 0 Normal
04/18/2026 08 AM PDT 5.48 58 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/18/2026 09 AM PDT 5.48 58 Normal
04/18/2026 10 AM PDT 5.48 58 0 Normal
04/18/2026 11 AM PDT 5.48 58 0 Normal
04/18/2026 12 PM PDT 5.48 58 0 Normal
04/18/2026 01 PM PDT 5.48 58 0 Normal
04/18/2026 02 PM PDT 5.49 59 + Normal
04/18/2026 03 PM PDT 5.49 59 0 Normal
04/18/2026 04 PM PDT 5.49 59 0 Normal
04/18/2026 05 PM PDT 5.49 59 0 Normal
04/18/2026 06 PM PDT 5.49 59 0 Normal
04/18/2026 07 PM PDT 5.49 59 0 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 5.48 58 - Normal
04/19/2026 03 AM PDT 5.48 58 0 Normal
04/19/2026 04 AM PDT 5.48 58 0 Normal
04/19/2026 05 AM PDT 5.48 58 0 Normal
04/19/2026 06 AM PDT 5.48 58 0 Normal
04/19/2026 07 AM PDT 5.48 58 0 Normal
04/19/2026 08 AM PDT 5.48 58 0 Normal
04/19/2026 09 AM PDT 5.48 58 0 Normal
04/19/2026 10 AM PDT 5.48 58 0 Normal
04/19/2026 11 AM PDT 5.48 58 0 Normal
04/19/2026 12 PM PDT 5.48 58 0 Normal
04/19/2026 01 PM PDT 5.48 58 0 Normal
04/19/2026 02 PM PDT 5.48 58 0 Normal
04/19/2026 03 PM PDT 5.48 58 0 Normal
04/19/2026 04 PM PDT 5.48 58 0 Normal
04/19/2026 05 PM PDT 5.48 58 0 Normal
04/19/2026 06 PM PDT 5.48 58 0 Normal
04/19/2026 07 PM PDT 5.48 58 0 Normal
04/19/2026 08 PM PDT 5.48 58 0 Normal
04/19/2026 09 PM PDT 5.48 58 0 Normal
04/19/2026 10 PM PDT 5.48 58 0 Normal
04/19/2026 11 PM PDT 5.48 58 0 Normal
04/20/2026 12 AM PDT 5.48 58 0 Normal
04/20/2026 01 AM PDT 5.48 58 0 Normal
04/20/2026 02 AM PDT 5.48 58 0 Normal
04/20/2026 03 AM PDT 5.48 58 0 Normal
04/20/2026 04 AM PDT 5.48 58 0 Normal
04/20/2026 05 AM PDT 5.48 58 0 Normal
04/20/2026 06 AM PDT 5.48 58 0 Normal
04/20/2026 07 AM PDT 5.48 58 0 Normal
04/20/2026 08 AM PDT 5.48 58 0 Normal
04/20/2026 09 AM PDT 5.48 58 0 Normal
04/20/2026 10 AM PDT 5.48 58 0 Normal
04/20/2026 11 AM PDT 5.48 58 0 Normal
04/20/2026 12 PM PDT 5.53 63 + Normal
04/20/2026 01 PM PDT 5.65 77 + Normal
04/20/2026 02 PM PDT 5.82 98 + Normal
04/20/2026 03 PM PDT 5.98 120 + Normal
04/20/2026 04 PM PDT 6.08 134 + Normal
04/20/2026 05 PM PDT 6.12 141 + Normal
04/20/2026 06 PM PDT 6.17 148 + Normal
04/20/2026 07 PM PDT 6.20 153 + Normal
04/20/2026 08 PM PDT 6.23 158 + Normal
04/20/2026 09 PM PDT 6.29 168 + Normal
04/20/2026 10 PM PDT 6.41 190 + Normal
04/20/2026 11 PM PDT 6.56 218 + Normal
04/21/2026 12 AM PDT 6.69 245 + Normal
04/21/2026 01 AM PDT 6.80 269 + Normal
04/21/2026 02 AM PDT 6.88 287 + Normal
04/21/2026 03 AM PDT 6.98 311 + Normal
04/21/2026 04 AM PDT 7.12 345 + Normal
04/21/2026 05 AM PDT 7.26 381 + Normal
04/21/2026 06 AM PDT 7.37 411 + Normal
04/21/2026 07 AM PDT 7.44 430 + Normal
04/21/2026 08 AM PDT 7.47 439 + Normal
04/21/2026 09 AM PDT 7.42 424 - Normal
04/21/2026 10 AM PDT 7.32 397 - Normal
04/21/2026 11 AM PDT 7.18 360 - Normal
04/21/2026 12 PM PDT 7.05 328 - Normal
04/21/2026 01 PM PDT 6.93 299 - Normal
04/21/2026 02 PM PDT 6.83 276 - Normal
04/21/2026 03 PM PDT 6.78 265 - Normal
04/21/2026 04 PM PDT 6.75 258 - Normal
04/21/2026 05 PM PDT 6.75 258 0 Normal
04/21/2026 06 PM PDT 6.75 258 0 Normal
04/21/2026 07 PM PDT 6.75 258 0 Normal
04/21/2026 08 PM PDT 6.75 258 0 Normal
04/21/2026 09 PM PDT 6.72 251 - Normal
04/21/2026 10 PM PDT 6.66 239 - Normal
04/21/2026 11 PM PDT 6.57 220 - Normal
04/22/2026 12 AM PDT 6.47 201 - Normal
04/22/2026 01 AM PDT 6.38 184 - Normal
04/22/2026 02 AM PDT 6.31 172 - Normal
04/22/2026 03 AM PDT 6.27 165 - Normal
04/22/2026 04 AM PDT 6.24 160 - Normal
04/22/2026 05 AM PDT 6.22 157 - Normal
04/22/2026 06 AM PDT 6.21 155 - Normal
04/22/2026 07 AM PDT 6.20 153 - Normal
04/22/2026 08 AM PDT 6.19 152 - Normal
04/22/2026 09 AM PDT 6.18 150 - Normal
04/22/2026 10 AM PDT 6.17 148 - Normal
04/22/2026 11 AM PDT 6.16 147 - Normal
04/22/2026 12 PM PDT 6.14 144 - Normal
04/22/2026 01 PM PDT 6.13 142 - Normal
04/22/2026 02 PM PDT 6.12 141 - Normal
04/22/2026 03 PM PDT 6.09 136 - Normal
04/22/2026 04 PM PDT 6.04 128 - Normal
04/22/2026 05 PM PDT 5.95 115 - Normal
04/22/2026 06 PM PDT 5.86 103 - Normal
04/22/2026 07 PM PDT 5.77 91 - Normal
04/22/2026 08 PM PDT 5.71 84 - Normal
04/22/2026 09 PM PDT 5.67 79 - Normal
04/22/2026 10 PM PDT 5.63 74 - Normal
04/22/2026 11 PM PDT 5.58 69 - Normal
04/23/2026 12 AM PDT 5.55 65 - Normal
04/23/2026 01 AM PDT 5.52 62 - Normal
04/23/2026 02 AM PDT 5.50 60 - Normal
04/23/2026 03 AM PDT 5.49 59 - Normal
04/23/2026 04 AM PDT 5.48 58 - Normal
04/23/2026 05 AM PDT 5.48 58 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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