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 22 2026 at 7:32 AM PDTNext Issuance: Apr 23 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:  04/22/2026 at 07:33 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:     04/22/2026 at 04:00 PM PDT
# Maximum Forecast Stage:                       6.37 Feet
# Maximum Forecast Flow:                        182 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/17/2026 07 AM PDT            5.49             59                        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            7.49            444         -              Normal
  04/21/2026 08 AM PDT            7.06            330         -              Normal
  04/21/2026 09 AM PDT            6.66            239         -              Normal
  04/21/2026 10 AM PDT            6.38            184         -              Normal
  04/21/2026 11 AM PDT            6.23            158         -              Normal
  04/21/2026 12 PM PDT            6.36            181         +              Normal
  04/21/2026 01 PM PDT            6.40            188         +              Normal
  04/21/2026 02 PM PDT            6.31            172         -              Normal
  04/21/2026 03 PM PDT            6.08            134         -              Normal
  04/21/2026 04 PM PDT            6.14            144         +              Normal
  04/21/2026 05 PM PDT            6.37            182         +              Normal
  04/21/2026 06 PM PDT            6.19            152         -              Normal
  04/21/2026 07 PM PDT            6.14            144         -              Normal
  04/21/2026 08 PM PDT            6.07            133         -              Normal
  04/21/2026 09 PM PDT            5.98            120         -              Normal
  04/21/2026 10 PM PDT            5.94            114         -              Normal
  04/21/2026 11 PM PDT            5.88            106         -              Normal
  04/22/2026 12 AM PDT            5.82             98         -              Normal
  04/22/2026 01 AM PDT            5.82             98         0              Normal
  04/22/2026 02 AM PDT            5.86            103         +              Normal
  04/22/2026 03 AM PDT            5.87            104         +              Normal
  04/22/2026 04 AM PDT            5.85            102         -              Normal
  04/22/2026 05 AM PDT            5.79             94         -              Normal
  04/22/2026 06 AM PDT            5.71             84         -              Normal
  04/22/2026 07 AM PDT            5.66             78         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/22/2026 08 AM PDT            5.62             73                        Normal
  04/22/2026 09 AM PDT            5.58             69         -              Normal
  04/22/2026 10 AM PDT            5.54             64         -              Normal
  04/22/2026 11 AM PDT            5.54             64         0              Normal
  04/22/2026 12 PM PDT            5.59             70         +              Normal
  04/22/2026 01 PM PDT            5.75             89         +              Normal
  04/22/2026 02 PM PDT            6.01            124         +              Normal
  04/22/2026 03 PM PDT            6.25            162         +              Normal
  04/22/2026 04 PM PDT            6.37            182         +              Normal
  04/22/2026 05 PM PDT            6.35            179         -              Normal
  04/22/2026 06 PM PDT            6.24            160         -              Normal
  04/22/2026 07 PM PDT            6.07            133         -              Normal
  04/22/2026 08 PM PDT            5.92            111         -              Normal
  04/22/2026 09 PM PDT            5.82             98         -              Normal
  04/22/2026 10 PM PDT            5.74             88         -              Normal
  04/22/2026 11 PM PDT            5.66             78         -              Normal
  04/23/2026 12 AM PDT            5.60             71         -              Normal
  04/23/2026 01 AM PDT            5.54             64         -              Normal
  04/23/2026 02 AM PDT            5.50             60         -              Normal
  04/23/2026 03 AM PDT            5.47             57         -              Normal
  04/23/2026 04 AM PDT            5.45             55         -              Normal
  04/23/2026 05 AM PDT            5.44             54         -              Normal
  04/23/2026 06 AM PDT            5.43             53         -              Normal
  04/23/2026 07 AM PDT            5.42             52         -              Normal
  04/23/2026 08 AM PDT            5.42             52         0              Normal
  04/23/2026 09 AM PDT            5.42             52         0              Normal
  04/23/2026 10 AM PDT            5.42             52         0              Normal
  04/23/2026 11 AM PDT            5.42             52         0              Normal
  04/23/2026 12 PM PDT            5.42             52         0              Normal
  04/23/2026 01 PM PDT            5.41             51         -              Normal
  04/23/2026 02 PM PDT            5.41             51         0              Normal
  04/23/2026 03 PM PDT            5.41             51         0              Normal
  04/23/2026 04 PM PDT            5.41             51         0              Normal
  04/23/2026 05 PM PDT            5.41             51         0              Normal
  04/23/2026 06 PM PDT            5.41             51         0              Normal
  04/23/2026 07 PM PDT            5.41             51         0              Normal
  04/23/2026 08 PM PDT            5.41             51         0              Normal
  04/23/2026 09 PM PDT            5.41             51         0              Normal
  04/23/2026 10 PM PDT            5.41             51         0              Normal
  04/23/2026 11 PM PDT            5.41             51         0              Normal
  04/24/2026 12 AM PDT            5.41             51         0              Normal
  04/24/2026 01 AM PDT            5.40             50         -              Normal
  04/24/2026 02 AM PDT            5.40             50         0              Normal
  04/24/2026 03 AM PDT            5.40             50         0              Normal
  04/24/2026 04 AM PDT            5.40             50         0              Normal
  04/24/2026 05 AM PDT            5.40             50         0              Normal
  04/24/2026 06 AM PDT            5.40             50         0              Normal
  04/24/2026 07 AM PDT            5.40             50         0              Normal
  04/24/2026 08 AM PDT            5.40             50         0              Normal
  04/24/2026 09 AM PDT            5.40             50         0              Normal
  04/24/2026 10 AM PDT            5.40             50         0              Normal
  04/24/2026 11 AM PDT            5.40             50         0              Normal
  04/24/2026 12 PM PDT            5.40             50         0              Normal
  04/24/2026 01 PM PDT            5.40             50         0              Normal
  04/24/2026 02 PM PDT            5.40             50         0              Normal
  04/24/2026 03 PM PDT            5.39             49         -              Normal
  04/24/2026 04 PM PDT            5.39             49         0              Normal
  04/24/2026 05 PM PDT            5.39             49         0              Normal
  04/24/2026 06 PM PDT            5.39             49         0              Normal
  04/24/2026 07 PM PDT            5.39             49         0              Normal
  04/24/2026 08 PM PDT            5.39             49         0              Normal
  04/24/2026 09 PM PDT            5.39             49         0              Normal
  04/24/2026 10 PM PDT            5.39             49         0              Normal
  04/24/2026 11 PM PDT            5.39             49         0              Normal
  04/25/2026 12 AM PDT            5.39             49         0              Normal
  04/25/2026 01 AM PDT            5.39             49         0              Normal
  04/25/2026 02 AM PDT            5.39             49         0              Normal
  04/25/2026 03 AM PDT            5.38             48         -              Normal
  04/25/2026 04 AM PDT            5.38             48         0              Normal
  04/25/2026 05 AM PDT            5.38             48         0              Normal
  04/25/2026 06 AM PDT            5.38             48         0              Normal
  04/25/2026 07 AM PDT            5.38             48         0              Normal
  04/25/2026 08 AM PDT            5.38             48         0              Normal
  04/25/2026 09 AM PDT            5.38             48         0              Normal
  04/25/2026 10 AM PDT            5.38             48         0              Normal
  04/25/2026 11 AM PDT            5.38             48         0              Normal
  04/25/2026 12 PM PDT            5.38             48         0              Normal
  04/25/2026 01 PM PDT            5.38             48         0              Normal
  04/25/2026 02 PM PDT            5.38             48         0              Normal
  04/25/2026 03 PM PDT            5.38             48         0              Normal
  04/25/2026 04 PM PDT            5.38             48         0              Normal
  04/25/2026 05 PM PDT            5.38             48         0              Normal
  04/25/2026 06 PM PDT            5.38             48         0              Normal
  04/25/2026 07 PM PDT            5.38             48         0              Normal
  04/25/2026 08 PM PDT            5.38             48         0              Normal
  04/25/2026 09 PM PDT            5.37             47         -              Normal
  04/25/2026 10 PM PDT            5.37             47         0              Normal
  04/25/2026 11 PM PDT            5.37             47         0              Normal
  04/26/2026 12 AM PDT            5.37             47         0              Normal
  04/26/2026 01 AM PDT            5.37             47         0              Normal
  04/26/2026 02 AM PDT            5.37             47         0              Normal
  04/26/2026 03 AM PDT            5.37             47         0              Normal
  04/26/2026 04 AM PDT            5.37             47         0              Normal
  04/26/2026 05 AM PDT            5.37             47         0              Normal
  04/26/2026 06 AM PDT            5.37             47         0              Normal
  04/26/2026 07 AM PDT            5.37             47         0              Normal
  04/26/2026 08 AM PDT            5.36             46         -              Normal
  04/26/2026 09 AM PDT            5.36             46         0              Normal
  04/26/2026 10 AM PDT            5.36             46         0              Normal
  04/26/2026 11 AM PDT            5.36             46         0              Normal
  04/26/2026 12 PM PDT            5.36             46         0              Normal
  04/26/2026 01 PM PDT            5.36             46         0              Normal
  04/26/2026 02 PM PDT            5.36             46         0              Normal
  04/26/2026 03 PM PDT            5.36             46         0              Normal
  04/26/2026 04 PM PDT            5.36             46         0              Normal
  04/26/2026 05 PM PDT            5.36             46         0              Normal
  04/26/2026 06 PM PDT            5.36             46         0              Normal
  04/26/2026 07 PM PDT            5.36             46         0              Normal
  04/26/2026 08 PM PDT            5.36             46         0              Normal
  04/26/2026 09 PM PDT            5.36             46         0              Normal
  04/26/2026 10 PM PDT            5.36             46         0              Normal
  04/26/2026 11 PM PDT            5.35             45         -              Normal
  04/27/2026 12 AM PDT            5.35             45         0              Normal
  04/27/2026 01 AM PDT            5.35             45         0              Normal
  04/27/2026 02 AM PDT            5.35             45         0              Normal
  04/27/2026 03 AM PDT            5.35             45         0              Normal
  04/27/2026 04 AM PDT            5.35             45         0              Normal
  04/27/2026 05 AM PDT            5.35             45         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.