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GUADALUPE RIVER - SAN JOSE AT ALMADEN EXPRESSWAY (GUDC1)
| Latitude: 37.28º N | Longitude: 121.88º W | Elevation: 150 Feet | | Forecast Type: Official Location |
| Location: Santa Clara County in California | Bulletin Group: Central Coast | River Group: South Bay |
| Issuance Time: | Apr 28 2026 at 7:50 AM PDT | Next Issuance: | Apr 29 2026 at 9:00 AM PDT
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| Action/Monitor: 9.0 Feet | Minor Flood: 10.5 Feet | Moderate Flood: 11.5 Feet | Major Flood: 15.0 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Guadalupe River - San Jose at Almaden Exprwy (GUDC1)
#
# File Generation Time: 04/28/2026 at 07:50 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/23/2026 at 02:00 PM PDT
# Maximum Observed Stage: 1.61 Feet
# Maximum Observed Flow: 18 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/28/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 1.54 Feet
# Maximum Forecast Flow: 14 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/23/2026 07 AM PDT 1.61 18 Normal
04/23/2026 08 AM PDT 1.61 18 0 Normal
04/23/2026 09 AM PDT 1.61 18 0 Normal
04/23/2026 10 AM PDT 1.61 18 0 Normal
04/23/2026 11 AM PDT 1.61 18 0 Normal
04/23/2026 12 PM PDT 1.61 18 0 Normal
04/23/2026 01 PM PDT 1.61 18 0 Normal
04/23/2026 02 PM PDT 1.61 18 0 Normal
04/23/2026 03 PM PDT 1.60 17 - Normal
04/23/2026 04 PM PDT 1.60 17 0 Normal
04/23/2026 05 PM PDT 1.60 17 0 Normal
04/23/2026 06 PM PDT 1.60 17 0 Normal
04/23/2026 07 PM PDT 1.59 17 - Normal
04/23/2026 08 PM PDT 1.59 17 0 Normal
04/23/2026 09 PM PDT 1.59 17 0 Normal
04/23/2026 10 PM PDT 1.58 16 - Normal
04/23/2026 11 PM PDT 1.58 16 0 Normal
04/24/2026 12 AM PDT 1.58 16 0 Normal
04/24/2026 01 AM PDT 1.58 16 0 Normal
04/24/2026 02 AM PDT 1.57 16 - Normal
04/24/2026 03 AM PDT 1.57 16 0 Normal
04/24/2026 04 AM PDT 1.57 16 0 Normal
04/24/2026 05 AM PDT 1.57 16 0 Normal
04/24/2026 06 AM PDT 1.57 16 0 Normal
04/24/2026 07 AM PDT 1.58 16 + Normal
04/24/2026 08 AM PDT 1.58 16 0 Normal
04/24/2026 09 AM PDT 1.58 16 0 Normal
04/24/2026 10 AM PDT 1.58 16 0 Normal
04/24/2026 11 AM PDT 1.58 16 0 Normal
04/24/2026 12 PM PDT 1.58 16 0 Normal
04/24/2026 01 PM PDT 1.58 16 0 Normal
04/24/2026 02 PM PDT 1.58 16 0 Normal
04/24/2026 03 PM PDT 1.60 17 + Normal
04/24/2026 04 PM PDT 1.60 17 0 Normal
04/24/2026 05 PM PDT 1.60 17 0 Normal
04/24/2026 06 PM PDT 1.60 17 0 Normal
04/24/2026 07 PM PDT 1.60 17 0 Normal
04/24/2026 08 PM PDT 1.60 17 0 Normal
04/24/2026 09 PM PDT 1.60 17 0 Normal
04/24/2026 10 PM PDT 1.60 17 0 Normal
04/24/2026 11 PM PDT 1.56 15 - Normal
04/25/2026 12 AM PDT 1.56 15 0 Normal
04/25/2026 01 AM PDT 1.57 16 + Normal
04/25/2026 02 AM PDT 1.58 16 + Normal
04/25/2026 03 AM PDT 1.58 16 0 Normal
04/25/2026 04 AM PDT 1.58 16 0 Normal
04/25/2026 05 AM PDT 1.59 17 + Normal
04/25/2026 06 AM PDT 1.59 17 0 Normal
04/25/2026 07 AM PDT 1.59 17 0 Normal
04/25/2026 08 AM PDT 1.59 17 0 Normal
04/25/2026 09 AM PDT 1.59 17 0 Normal
04/25/2026 10 AM PDT 1.59 17 0 Normal
04/25/2026 11 AM PDT 1.59 17 0 Normal
04/25/2026 12 PM PDT 1.59 17 0 Normal
04/25/2026 01 PM PDT 1.59 17 0 Normal
04/25/2026 02 PM PDT 1.59 17 0 Normal
04/25/2026 03 PM PDT 1.59 17 0 Normal
04/25/2026 04 PM PDT 1.59 17 0 Normal
04/25/2026 05 PM PDT 1.59 17 0 Normal
04/25/2026 06 PM PDT 1.59 17 0 Normal
04/25/2026 07 PM PDT 1.59 17 0 Normal
04/25/2026 08 PM PDT 1.59 17 0 Normal
04/25/2026 09 PM PDT 1.59 17 0 Normal
04/25/2026 10 PM PDT 1.59 17 0 Normal
04/25/2026 11 PM PDT 1.57 16 - Normal
04/26/2026 12 AM PDT 1.57 16 0 Normal
04/26/2026 01 AM PDT 1.57 16 0 Normal
04/26/2026 02 AM PDT 1.57 16 0 Normal
04/26/2026 03 AM PDT 1.57 16 0 Normal
04/26/2026 04 AM PDT 1.57 16 0 Normal
04/26/2026 05 AM PDT 1.57 16 0 Normal
04/26/2026 06 AM PDT 1.57 16 0 Normal
04/26/2026 07 AM PDT 1.57 16 0 Normal
04/26/2026 08 AM PDT 1.57 16 0 Normal
04/26/2026 09 AM PDT 1.57 16 0 Normal
04/26/2026 10 AM PDT 1.57 16 0 Normal
04/26/2026 11 AM PDT 1.57 16 0 Normal
04/26/2026 12 PM PDT 1.57 16 0 Normal
04/26/2026 01 PM PDT 1.57 16 0 Normal
04/26/2026 02 PM PDT 1.57 16 0 Normal
04/26/2026 03 PM PDT 1.57 16 0 Normal
04/26/2026 04 PM PDT 1.57 16 0 Normal
04/26/2026 05 PM PDT 1.57 16 0 Normal
04/26/2026 06 PM PDT 1.57 16 0 Normal
04/26/2026 07 PM PDT 1.57 16 0 Normal
04/26/2026 08 PM PDT 1.56 15 - Normal
04/26/2026 09 PM PDT 1.56 15 0 Normal
04/26/2026 10 PM PDT 1.56 15 0 Normal
04/26/2026 11 PM PDT 1.56 15 0 Normal
04/27/2026 12 AM PDT 1.56 15 0 Normal
04/27/2026 01 AM PDT 1.56 15 0 Normal
04/27/2026 02 AM PDT 1.56 15 0 Normal
04/27/2026 03 AM PDT 1.56 15 0 Normal
04/27/2026 04 AM PDT 1.56 15 0 Normal
04/27/2026 05 AM PDT 1.56 15 0 Normal
04/27/2026 06 AM PDT 1.56 15 0 Normal
04/27/2026 07 AM PDT 1.56 15 0 Normal
04/27/2026 08 AM PDT 1.56 15 0 Normal
04/27/2026 09 AM PDT 1.56 15 0 Normal
04/27/2026 10 AM PDT 1.56 15 0 Normal
04/27/2026 11 AM PDT 1.56 15 0 Normal
04/27/2026 12 PM PDT 1.55 15 - Normal
04/27/2026 01 PM PDT 1.55 15 0 Normal
04/27/2026 02 PM PDT 1.55 15 0 Normal
04/27/2026 03 PM PDT 1.55 15 0 Normal
04/27/2026 04 PM PDT 1.55 15 0 Normal
04/27/2026 05 PM PDT 1.55 15 0 Normal
04/27/2026 06 PM PDT 1.55 15 0 Normal
04/27/2026 07 PM PDT 1.54 14 - Normal
04/27/2026 08 PM PDT 1.54 14 0 Normal
04/27/2026 09 PM PDT 1.54 14 0 Normal
04/27/2026 10 PM PDT 1.54 14 0 Normal
04/27/2026 11 PM PDT 1.54 14 0 Normal
04/28/2026 12 AM PDT 1.54 14 0 Normal
04/28/2026 01 AM PDT 1.54 14 0 Normal
04/28/2026 02 AM PDT 1.54 14 0 Normal
04/28/2026 03 AM PDT 1.54 14 0 Normal
04/28/2026 04 AM PDT 1.54 14 0 Normal
04/28/2026 05 AM PDT 1.54 14 0 Normal
04/28/2026 06 AM PDT 1.54 14 0 Normal
04/28/2026 07 AM PDT 1.54 14 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/28/2026 08 AM PDT 1.54 14 Normal
04/28/2026 09 AM PDT 1.53 13 - Normal
04/28/2026 10 AM PDT 1.53 13 0 Normal
04/28/2026 11 AM PDT 1.53 13 0 Normal
04/28/2026 12 PM PDT 1.53 13 0 Normal
04/28/2026 01 PM PDT 1.53 13 0 Normal
04/28/2026 02 PM PDT 1.53 13 0 Normal
04/28/2026 03 PM PDT 1.53 13 0 Normal
04/28/2026 04 PM PDT 1.53 13 0 Normal
04/28/2026 05 PM PDT 1.53 13 0 Normal
04/28/2026 06 PM PDT 1.52 13 - Normal
04/28/2026 07 PM PDT 1.52 13 0 Normal
04/28/2026 08 PM PDT 1.52 13 0 Normal
04/28/2026 09 PM PDT 1.52 13 0 Normal
04/28/2026 10 PM PDT 1.52 13 0 Normal
04/28/2026 11 PM PDT 1.52 13 0 Normal
04/29/2026 12 AM PDT 1.52 13 0 Normal
04/29/2026 01 AM PDT 1.52 13 0 Normal
04/29/2026 02 AM PDT 1.52 13 0 Normal
04/29/2026 03 AM PDT 1.52 13 0 Normal
04/29/2026 04 AM PDT 1.52 13 0 Normal
04/29/2026 05 AM PDT 1.52 13 0 Normal
04/29/2026 06 AM PDT 1.52 13 0 Normal
04/29/2026 07 AM PDT 1.52 13 0 Normal
04/29/2026 08 AM PDT 1.52 13 0 Normal
04/29/2026 09 AM PDT 1.52 13 0 Normal
04/29/2026 10 AM PDT 1.52 13 0 Normal
04/29/2026 11 AM PDT 1.52 13 0 Normal
04/29/2026 12 PM PDT 1.52 13 0 Normal
04/29/2026 01 PM PDT 1.52 13 0 Normal
04/29/2026 02 PM PDT 1.52 13 0 Normal
04/29/2026 03 PM PDT 1.52 13 0 Normal
04/29/2026 04 PM PDT 1.52 13 0 Normal
04/29/2026 05 PM PDT 1.52 13 0 Normal
04/29/2026 06 PM PDT 1.51 12 - Normal
04/29/2026 07 PM PDT 1.51 12 0 Normal
04/29/2026 08 PM PDT 1.51 12 0 Normal
04/29/2026 09 PM PDT 1.51 12 0 Normal
04/29/2026 10 PM PDT 1.51 12 0 Normal
04/29/2026 11 PM PDT 1.51 12 0 Normal
04/30/2026 12 AM PDT 1.51 12 0 Normal
04/30/2026 01 AM PDT 1.51 12 0 Normal
04/30/2026 02 AM PDT 1.51 12 0 Normal
04/30/2026 03 AM PDT 1.51 12 0 Normal
04/30/2026 04 AM PDT 1.51 12 0 Normal
04/30/2026 05 AM PDT 1.51 12 0 Normal
04/30/2026 06 AM PDT 1.51 12 0 Normal
04/30/2026 07 AM PDT 1.51 12 0 Normal
04/30/2026 08 AM PDT 1.51 12 0 Normal
04/30/2026 09 AM PDT 1.51 12 0 Normal
04/30/2026 10 AM PDT 1.51 12 0 Normal
04/30/2026 11 AM PDT 1.51 12 0 Normal
04/30/2026 12 PM PDT 1.51 12 0 Normal
04/30/2026 01 PM PDT 1.50 12 - Normal
04/30/2026 02 PM PDT 1.50 12 0 Normal
04/30/2026 03 PM PDT 1.50 12 0 Normal
04/30/2026 04 PM PDT 1.50 12 0 Normal
04/30/2026 05 PM PDT 1.50 12 0 Normal
04/30/2026 06 PM PDT 1.50 12 0 Normal
04/30/2026 07 PM PDT 1.50 12 0 Normal
04/30/2026 08 PM PDT 1.50 12 0 Normal
04/30/2026 09 PM PDT 1.50 12 0 Normal
04/30/2026 10 PM PDT 1.50 12 0 Normal
04/30/2026 11 PM PDT 1.50 12 0 Normal
05/01/2026 12 AM PDT 1.50 12 0 Normal
05/01/2026 01 AM PDT 1.49 12 - Normal
05/01/2026 02 AM PDT 1.49 12 0 Normal
05/01/2026 03 AM PDT 1.49 12 0 Normal
05/01/2026 04 AM PDT 1.49 12 0 Normal
05/01/2026 05 AM PDT 1.49 12 0 Normal
05/01/2026 06 AM PDT 1.49 12 0 Normal
05/01/2026 07 AM PDT 1.49 12 0 Normal
05/01/2026 08 AM PDT 1.49 12 0 Normal
05/01/2026 09 AM PDT 1.49 12 0 Normal
05/01/2026 10 AM PDT 1.49 12 0 Normal
05/01/2026 11 AM PDT 1.49 12 0 Normal
05/01/2026 12 PM PDT 1.49 12 0 Normal
05/01/2026 01 PM PDT 1.49 12 0 Normal
05/01/2026 02 PM PDT 1.49 12 0 Normal
05/01/2026 03 PM PDT 1.49 12 0 Normal
05/01/2026 04 PM PDT 1.49 12 0 Normal
05/01/2026 05 PM PDT 1.49 12 0 Normal
05/01/2026 06 PM PDT 1.48 11 - Normal
05/01/2026 07 PM PDT 1.48 11 0 Normal
05/01/2026 08 PM PDT 1.48 11 0 Normal
05/01/2026 09 PM PDT 1.48 11 0 Normal
05/01/2026 10 PM PDT 1.48 11 0 Normal
05/01/2026 11 PM PDT 1.48 11 0 Normal
05/02/2026 12 AM PDT 1.48 11 0 Normal
05/02/2026 01 AM PDT 1.48 11 0 Normal
05/02/2026 02 AM PDT 1.48 11 0 Normal
05/02/2026 03 AM PDT 1.48 11 0 Normal
05/02/2026 04 AM PDT 1.48 11 0 Normal
05/02/2026 05 AM PDT 1.48 11 0 Normal
05/02/2026 06 AM PDT 1.48 11 0 Normal
05/02/2026 07 AM PDT 1.48 11 0 Normal
05/02/2026 08 AM PDT 1.48 11 0 Normal
05/02/2026 09 AM PDT 1.48 11 0 Normal
05/02/2026 10 AM PDT 1.48 11 0 Normal
05/02/2026 11 AM PDT 1.48 11 0 Normal
05/02/2026 12 PM PDT 1.48 11 0 Normal
05/02/2026 01 PM PDT 1.48 11 0 Normal
05/02/2026 02 PM PDT 1.48 11 0 Normal
05/02/2026 03 PM PDT 1.47 11 - Normal
05/02/2026 04 PM PDT 1.47 11 0 Normal
05/02/2026 05 PM PDT 1.47 11 0 Normal
05/02/2026 06 PM PDT 1.47 11 0 Normal
05/02/2026 07 PM PDT 1.46 10 - Normal
05/02/2026 08 PM PDT 1.46 10 0 Normal
05/02/2026 09 PM PDT 1.46 10 0 Normal
05/02/2026 10 PM PDT 1.46 10 0 Normal
05/02/2026 11 PM PDT 1.46 10 0 Normal
05/03/2026 12 AM PDT 1.46 10 0 Normal
05/03/2026 01 AM PDT 1.46 10 0 Normal
05/03/2026 02 AM PDT 1.46 10 0 Normal
05/03/2026 03 AM PDT 1.46 10 0 Normal
05/03/2026 04 AM PDT 1.46 10 0 Normal
05/03/2026 05 AM PDT 1.46 10 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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