National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

 | 

GUADALUPE RIVER - SAN JOSE AT US HIGHWAY 101 (GSJC1)
Latitude: 37.37º NLongitude: 121.93º WElevation: 72 FeetForecast Type: Unofficial Location
Location: Santa Clara County in CaliforniaBulletin Group: Central CoastRiver Group: South Bay
Issuance Time: Apr 21 2026 at 7:21 AM PDTNext Issuance: Apr 22 2026 at 9:00 AM PDT
Action/Monitor: 17.0 FeetMinor Flood: 18.5 FeetModerate Flood: 19.5 FeetMajor 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.