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

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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 19 2026 at 7:19 AM PDTNext Issuance: Apr 20 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:  04/19/2026 at 07:21 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 09:00 AM PDT
# Maximum Forecast Stage:                       7.35 Feet
# Maximum Forecast Flow:                        405 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/14/2026 07 AM PDT            5.44             54                        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            5.49             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
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/19/2026 08 AM PDT            5.49             59                        Normal
  04/19/2026 09 AM PDT            5.49             59         0              Normal
  04/19/2026 10 AM PDT            5.49             59         0              Normal
  04/19/2026 11 AM PDT            5.49             59         0              Normal
  04/19/2026 12 PM PDT            5.49             59         0              Normal
  04/19/2026 01 PM PDT            5.49             59         0              Normal
  04/19/2026 02 PM PDT            5.49             59         0              Normal
  04/19/2026 03 PM PDT            5.49             59         0              Normal
  04/19/2026 04 PM PDT            5.49             59         0              Normal
  04/19/2026 05 PM PDT            5.49             59         0              Normal
  04/19/2026 06 PM PDT            5.49             59         0              Normal
  04/19/2026 07 PM PDT            5.49             59         0              Normal
  04/19/2026 08 PM PDT            5.49             59         0              Normal
  04/19/2026 09 PM PDT            5.49             59         0              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            5.49             59         0              Normal
  04/20/2026 09 AM PDT            5.49             59         0              Normal
  04/20/2026 10 AM PDT            5.51             61         +              Normal
  04/20/2026 11 AM PDT            5.53             63         +              Normal
  04/20/2026 12 PM PDT            5.55             65         +              Normal
  04/20/2026 01 PM PDT            5.57             68         +              Normal
  04/20/2026 02 PM PDT            5.58             69         +              Normal
  04/20/2026 03 PM PDT            5.58             69         0              Normal
  04/20/2026 04 PM PDT            5.58             69         0              Normal
  04/20/2026 05 PM PDT            5.60             71         +              Normal
  04/20/2026 06 PM PDT            5.65             77         +              Normal
  04/20/2026 07 PM PDT            5.73             86         +              Normal
  04/20/2026 08 PM PDT            5.80             95         +              Normal
  04/20/2026 09 PM PDT            5.90            109         +              Normal
  04/20/2026 10 PM PDT            6.08            134         +              Normal
  04/20/2026 11 PM PDT            6.33            175         +              Normal
  04/21/2026 12 AM PDT            6.58            222         +              Normal
  04/21/2026 01 AM PDT            6.80            269         +              Normal
  04/21/2026 02 AM PDT            6.99            313         +              Normal
  04/21/2026 03 AM PDT            7.12            345         +              Normal
  04/21/2026 04 AM PDT            7.18            360         +              Normal
  04/21/2026 05 AM PDT            7.20            365         +              Normal
  04/21/2026 06 AM PDT            7.23            373         +              Normal
  04/21/2026 07 AM PDT            7.28            386         +              Normal
  04/21/2026 08 AM PDT            7.34            402         +              Normal
  04/21/2026 09 AM PDT            7.35            405         +              Normal
  04/21/2026 10 AM PDT            7.28            386         -              Normal
  04/21/2026 11 AM PDT            7.17            358         -              Normal
  04/21/2026 12 PM PDT            7.05            328         -              Normal
  04/21/2026 01 PM PDT            6.92            296         -              Normal
  04/21/2026 02 PM PDT            6.83            276         -              Normal
  04/21/2026 03 PM PDT            6.80            269         -              Normal
  04/21/2026 04 PM PDT            6.81            271         +              Normal
  04/21/2026 05 PM PDT            6.86            283         +              Normal
  04/21/2026 06 PM PDT            6.91            294         +              Normal
  04/21/2026 07 PM PDT            6.95            304         +              Normal
  04/21/2026 08 PM PDT            6.97            308         +              Normal
  04/21/2026 09 PM PDT            6.93            299         -              Normal
  04/21/2026 10 PM PDT            6.82            273         -              Normal
  04/21/2026 11 PM PDT            6.68            243         -              Normal
  04/22/2026 12 AM PDT            6.52            210         -              Normal
  04/22/2026 01 AM PDT            6.37            182         -              Normal
  04/22/2026 02 AM PDT            6.26            163         -              Normal
  04/22/2026 03 AM PDT            6.17            148         -              Normal
  04/22/2026 04 AM PDT            6.10            138         -              Normal
  04/22/2026 05 AM PDT            6.03            127         -              Normal
  04/22/2026 06 AM PDT            5.97            118         -              Normal
  04/22/2026 07 AM PDT            5.93            113         -              Normal
  04/22/2026 08 AM PDT            5.89            107         -              Normal
  04/22/2026 09 AM PDT            5.87            104         -              Normal
  04/22/2026 10 AM PDT            5.83             99         -              Normal
  04/22/2026 11 AM PDT            5.78             93         -              Normal
  04/22/2026 12 PM PDT            5.73             86         -              Normal
  04/22/2026 01 PM PDT            5.70             83         -              Normal
  04/22/2026 02 PM PDT            5.67             79         -              Normal
  04/22/2026 03 PM PDT            5.65             77         -              Normal
  04/22/2026 04 PM PDT            5.62             73         -              Normal
  04/22/2026 05 PM PDT            5.59             70         -              Normal
  04/22/2026 06 PM PDT            5.57             68         -              Normal
  04/22/2026 07 PM PDT            5.54             64         -              Normal
  04/22/2026 08 PM PDT            5.53             63         -              Normal
  04/22/2026 09 PM PDT            5.52             62         -              Normal
  04/22/2026 10 PM PDT            5.51             61         -              Normal
  04/22/2026 11 PM PDT            5.51             61         0              Normal
  04/23/2026 12 AM PDT            5.50             60         -              Normal
  04/23/2026 01 AM PDT            5.50             60         0              Normal
  04/23/2026 02 AM PDT            5.49             59         -              Normal
  04/23/2026 03 AM PDT            5.49             59         0              Normal
  04/23/2026 04 AM PDT            5.48             58         -              Normal
  04/23/2026 05 AM PDT            5.48             58         0              Normal
  04/23/2026 06 AM PDT            5.48             58         0              Normal
  04/23/2026 07 AM PDT            5.48             58         0              Normal
  04/23/2026 08 AM PDT            5.48             58         0              Normal
  04/23/2026 09 AM PDT            5.48             58         0              Normal
  04/23/2026 10 AM PDT            5.48             58         0              Normal
  04/23/2026 11 AM PDT            5.48             58         0              Normal
  04/23/2026 12 PM PDT            5.48             58         0              Normal
  04/23/2026 01 PM PDT            5.48             58         0              Normal
  04/23/2026 02 PM PDT            5.48             58         0              Normal
  04/23/2026 03 PM PDT            5.48             58         0              Normal
  04/23/2026 04 PM PDT            5.48             58         0              Normal
  04/23/2026 05 PM PDT            5.47             57         -              Normal
  04/23/2026 06 PM PDT            5.47             57         0              Normal
  04/23/2026 07 PM PDT            5.47             57         0              Normal
  04/23/2026 08 PM PDT            5.47             57         0              Normal
  04/23/2026 09 PM PDT            5.47             57         0              Normal
  04/23/2026 10 PM PDT            5.47             57         0              Normal
  04/23/2026 11 PM PDT            5.47             57         0              Normal
  04/24/2026 12 AM PDT            5.47             57         0              Normal
  04/24/2026 01 AM PDT            5.47             57         0              Normal
  04/24/2026 02 AM PDT            5.47             57         0              Normal
  04/24/2026 03 AM PDT            5.47             57         0              Normal
  04/24/2026 04 AM PDT            5.47             57         0              Normal
  04/24/2026 05 AM PDT            5.47             57         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.