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

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NAPA RIVER - SAINT HELENA (SHEC1)
Latitude: 38.51º NLongitude: 122.45º WElevation: 195 Feet
Location: Napa County in CaliforniaBulletin Group: Russian NapaRiver Group: Russian Napa
Issuance Time: Jul 15 2025 at 7:29 AM PDTNext Issuance: Jul 16 2025 at 9:00 AM PDT
Action/Monitor: 16.0 FeetMinor Flood: 18.0 FeetModerate Flood: 20.0 FeetMajor Flood: 22.0 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: Napa River - Saint Helena (SHEC1)
#
# File Generation Time:  07/15/2025 at 07:29 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  07/10/2025 at 09:00 PM PDT
# Maximum Observed Stage:                       1.23 Feet
# Maximum Observed Flow:                        2 cfs
#
# Earliest Date & Time of Maximum Forecast:     07/15/2025 at 08:00 AM PDT
# Maximum Forecast Stage:                       1.20 Feet
# Maximum Forecast Flow:                        2 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/10/2025 07 AM PDT            1.22              2                        Normal
  07/10/2025 08 AM PDT            1.23              2         +              Normal
  07/10/2025 09 AM PDT            1.23              2         0              Normal
  07/10/2025 10 AM PDT            1.23              2         0              Normal
  07/10/2025 11 AM PDT            1.23              2         0              Normal
  07/10/2025 12 PM PDT            1.23              2         0              Normal
  07/10/2025 01 PM PDT            1.23              2         0              Normal
  07/10/2025 02 PM PDT            1.23              2         0              Normal
  07/10/2025 03 PM PDT            1.23              2         0              Normal
  07/10/2025 04 PM PDT            1.23              2         0              Normal
  07/10/2025 05 PM PDT            1.23              2         0              Normal
  07/10/2025 06 PM PDT            1.23              2         0              Normal
  07/10/2025 07 PM PDT            1.23              2         0              Normal
  07/10/2025 08 PM PDT            1.23              2         0              Normal
  07/10/2025 09 PM PDT            1.23              2         0              Normal
  07/10/2025 10 PM PDT            1.22              2         -              Normal
  07/10/2025 11 PM PDT            1.22              2         0              Normal
  07/11/2025 12 AM PDT            1.22              2         0              Normal
  07/11/2025 01 AM PDT            1.22              2         0              Normal
  07/11/2025 02 AM PDT            1.22              2         0              Normal
  07/11/2025 03 AM PDT            1.22              2         0              Normal
  07/11/2025 04 AM PDT            1.22              2         0              Normal
  07/11/2025 05 AM PDT            1.22              2         0              Normal
  07/11/2025 06 AM PDT            1.22              2         0              Normal
  07/11/2025 07 AM PDT            1.22              2         0              Normal
  07/11/2025 08 AM PDT            1.22              2         0              Normal
  07/11/2025 09 AM PDT            1.22              2         0              Normal
  07/11/2025 10 AM PDT            1.22              2         0              Normal
  07/11/2025 11 AM PDT            1.22              2         0              Normal
  07/11/2025 12 PM PDT            1.22              2         0              Normal
  07/11/2025 01 PM PDT            1.22              2         0              Normal
  07/11/2025 02 PM PDT            1.22              2         0              Normal
  07/11/2025 03 PM PDT            1.22              2         0              Normal
  07/11/2025 04 PM PDT            1.22              2         0              Normal
  07/11/2025 05 PM PDT            1.22              2         0              Normal
  07/11/2025 06 PM PDT            1.22              2         0              Normal
  07/11/2025 07 PM PDT            1.22              2         0              Normal
  07/11/2025 08 PM PDT            1.22              2         0              Normal
  07/11/2025 09 PM PDT            1.22              2         0              Normal
  07/11/2025 10 PM PDT            1.22              2         0              Normal
  07/11/2025 11 PM PDT            1.22              2         0              Normal
  07/12/2025 12 AM PDT            1.22              2         0              Normal
  07/12/2025 01 AM PDT            1.22              2         0              Normal
  07/12/2025 02 AM PDT            1.22              2         0              Normal
  07/12/2025 03 AM PDT            1.21              2         -              Normal
  07/12/2025 04 AM PDT            1.21              2         0              Normal
  07/12/2025 05 AM PDT            1.21              2         0              Normal
  07/12/2025 06 AM PDT            1.21              2         0              Normal
  07/12/2025 07 AM PDT            1.21              2         0              Normal
  07/12/2025 08 AM PDT            1.21              2         0              Normal
  07/12/2025 09 AM PDT            1.20              2         -              Normal
  07/12/2025 10 AM PDT            1.21              2         +              Normal
  07/12/2025 11 AM PDT            1.21              2         0              Normal
  07/12/2025 12 PM PDT            1.21              2         0              Normal
  07/12/2025 01 PM PDT            1.21              2         0              Normal
  07/12/2025 02 PM PDT            1.21              2         0              Normal
  07/12/2025 03 PM PDT            1.21              2         0              Normal
  07/12/2025 04 PM PDT            1.22              2         +              Normal
  07/12/2025 05 PM PDT            1.22              2         0              Normal
  07/12/2025 06 PM PDT            1.22              2         0              Normal
  07/12/2025 07 PM PDT            1.22              2         0              Normal
  07/12/2025 08 PM PDT            1.22              2         0              Normal
  07/12/2025 09 PM PDT            1.22              2         0              Normal
  07/12/2025 10 PM PDT            1.22              2         0              Normal
  07/12/2025 11 PM PDT            1.20              2         -              Normal
  07/13/2025 12 AM PDT            1.20              2         0              Normal
  07/13/2025 01 AM PDT            1.20              2         0              Normal
  07/13/2025 02 AM PDT            1.20              2         0              Normal
  07/13/2025 03 AM PDT            1.20              2         0              Normal
  07/13/2025 04 AM PDT            1.20              2         0              Normal
  07/13/2025 05 AM PDT            1.21              2         +              Normal
  07/13/2025 06 AM PDT            1.20              2         -              Normal
  07/13/2025 07 AM PDT            1.20              2         0              Normal
  07/13/2025 08 AM PDT            1.20              2         0              Normal
  07/13/2025 09 AM PDT            1.21              2         +              Normal
  07/13/2025 10 AM PDT            1.21              2         0              Normal
  07/13/2025 11 AM PDT            1.21              2         0              Normal
  07/13/2025 12 PM PDT            1.21              2         0              Normal
  07/13/2025 01 PM PDT            1.21              2         0              Normal
  07/13/2025 02 PM PDT            1.21              2         0              Normal
  07/13/2025 03 PM PDT            1.21              2         0              Normal
  07/13/2025 04 PM PDT            1.21              2         0              Normal
  07/13/2025 05 PM PDT            1.21              2         0              Normal
  07/13/2025 06 PM PDT            1.21              2         0              Normal
  07/13/2025 07 PM PDT            1.21              2         0              Normal
  07/13/2025 08 PM PDT            1.21              2         0              Normal
  07/13/2025 09 PM PDT            1.21              2         0              Normal
  07/13/2025 10 PM PDT            1.21              2         0              Normal
  07/13/2025 11 PM PDT            1.20              2         -              Normal
  07/14/2025 12 AM PDT            1.19              2         -              Normal
  07/14/2025 01 AM PDT            1.19              2         0              Normal
  07/14/2025 02 AM PDT            1.19              2         0              Normal
  07/14/2025 03 AM PDT            1.19              2         0              Normal
  07/14/2025 04 AM PDT            1.19              2         0              Normal
  07/14/2025 05 AM PDT            1.20              2         +              Normal
  07/14/2025 06 AM PDT            1.20              2         0              Normal
  07/14/2025 07 AM PDT            1.20              2         0              Normal
  07/14/2025 08 AM PDT            1.20              2         0              Normal
  07/14/2025 09 AM PDT            1.21              2         +              Normal
  07/14/2025 10 AM PDT            1.21              2         0              Normal
  07/14/2025 11 AM PDT            1.21              2         0              Normal
  07/14/2025 12 PM PDT            1.21              2         0              Normal
  07/14/2025 01 PM PDT            1.21              2         0              Normal
  07/14/2025 02 PM PDT            1.21              2         0              Normal
  07/14/2025 03 PM PDT            1.21              2         0              Normal
  07/14/2025 04 PM PDT            1.21              2         0              Normal
  07/14/2025 05 PM PDT            1.21              2         0              Normal
  07/14/2025 06 PM PDT            1.21              2         0              Normal
  07/14/2025 07 PM PDT            1.20              2         -              Normal
  07/14/2025 08 PM PDT            1.20              2         0              Normal
  07/14/2025 09 PM PDT            1.20              2         0              Normal
  07/14/2025 10 PM PDT            1.20              2         0              Normal
  07/14/2025 11 PM PDT            1.20              2         0              Normal
  07/15/2025 12 AM PDT            1.20              2         0              Normal
  07/15/2025 01 AM PDT            1.19              2         -              Normal
  07/15/2025 02 AM PDT            1.19              2         0              Normal
  07/15/2025 03 AM PDT            1.19              2         0              Normal
  07/15/2025 04 AM PDT            1.19              2         0              Normal
  07/15/2025 05 AM PDT            1.19              2         0              Normal
  07/15/2025 06 AM PDT            1.20              2         +              Normal
  07/15/2025 07 AM PDT            1.20              2         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  07/15/2025 08 AM PDT            1.20              2                        Normal
  07/15/2025 09 AM PDT            1.20              2         0              Normal
  07/15/2025 10 AM PDT            1.20              2         0              Normal
  07/15/2025 11 AM PDT            1.20              2         0              Normal
  07/15/2025 12 PM PDT            1.20              2         0              Normal
  07/15/2025 01 PM PDT            1.20              2         0              Normal
  07/15/2025 02 PM PDT            1.20              2         0              Normal
  07/15/2025 03 PM PDT            1.20              2         0              Normal
  07/15/2025 04 PM PDT            1.20              2         0              Normal
  07/15/2025 05 PM PDT            1.20              2         0              Normal
  07/15/2025 06 PM PDT            1.20              2         0              Normal
  07/15/2025 07 PM PDT            1.20              2         0              Normal
  07/15/2025 08 PM PDT            1.20              2         0              Normal
  07/15/2025 09 PM PDT            1.20              2         0              Normal
  07/15/2025 10 PM PDT            1.20              2         0              Normal
  07/15/2025 11 PM PDT            1.20              2         0              Normal
  07/16/2025 12 AM PDT            1.20              2         0              Normal
  07/16/2025 01 AM PDT            1.20              2         0              Normal
  07/16/2025 02 AM PDT            1.20              2         0              Normal
  07/16/2025 03 AM PDT            1.20              2         0              Normal
  07/16/2025 04 AM PDT            1.20              2         0              Normal
  07/16/2025 05 AM PDT            1.20              2         0              Normal
  07/16/2025 06 AM PDT            1.20              2         0              Normal
  07/16/2025 07 AM PDT            1.20              2         0              Normal
  07/16/2025 08 AM PDT            1.20              2         0              Normal
  07/16/2025 09 AM PDT            1.20              2         0              Normal
  07/16/2025 10 AM PDT            1.20              2         0              Normal
  07/16/2025 11 AM PDT            1.20              2         0              Normal
  07/16/2025 12 PM PDT            1.20              2         0              Normal
  07/16/2025 01 PM PDT            1.20              2         0              Normal
  07/16/2025 02 PM PDT            1.20              2         0              Normal
  07/16/2025 03 PM PDT            1.20              2         0              Normal
  07/16/2025 04 PM PDT            1.20              2         0              Normal
  07/16/2025 05 PM PDT            1.20              2         0              Normal
  07/16/2025 06 PM PDT            1.20              2         0              Normal
  07/16/2025 07 PM PDT            1.20              2         0              Normal
  07/16/2025 08 PM PDT            1.20              2         0              Normal
  07/16/2025 09 PM PDT            1.20              2         0              Normal
  07/16/2025 10 PM PDT            1.20              2         0              Normal
  07/16/2025 11 PM PDT            1.20              2         0              Normal
  07/17/2025 12 AM PDT            1.20              2         0              Normal
  07/17/2025 01 AM PDT            1.20              2         0              Normal
  07/17/2025 02 AM PDT            1.20              2         0              Normal
  07/17/2025 03 AM PDT            1.20              2         0              Normal
  07/17/2025 04 AM PDT            1.20              2         0              Normal
  07/17/2025 05 AM PDT            1.20              2         0              Normal
  07/17/2025 06 AM PDT            1.20              2         0              Normal
  07/17/2025 07 AM PDT            1.20              2         0              Normal
  07/17/2025 08 AM PDT            1.20              2         0              Normal
  07/17/2025 09 AM PDT            1.20              2         0              Normal
  07/17/2025 10 AM PDT            1.20              2         0              Normal
  07/17/2025 11 AM PDT            1.20              2         0              Normal
  07/17/2025 12 PM PDT            1.20              2         0              Normal
  07/17/2025 01 PM PDT            1.20              2         0              Normal
  07/17/2025 02 PM PDT            1.20              2         0              Normal
  07/17/2025 03 PM PDT            1.20              2         0              Normal
  07/17/2025 04 PM PDT            1.20              2         0              Normal
  07/17/2025 05 PM PDT            1.20              2         0              Normal
  07/17/2025 06 PM PDT            1.20              2         0              Normal
  07/17/2025 07 PM PDT            1.20              2         0              Normal
  07/17/2025 08 PM PDT            1.20              2         0              Normal
  07/17/2025 09 PM PDT            1.20              2         0              Normal
  07/17/2025 10 PM PDT            1.20              2         0              Normal
  07/17/2025 11 PM PDT            1.20              2         0              Normal
  07/18/2025 12 AM PDT            1.20              2         0              Normal
  07/18/2025 01 AM PDT            1.20              2         0              Normal
  07/18/2025 02 AM PDT            1.20              2         0              Normal
  07/18/2025 03 AM PDT            1.20              2         0              Normal
  07/18/2025 04 AM PDT            1.20              2         0              Normal
  07/18/2025 05 AM PDT            1.20              2         0              Normal
  07/18/2025 06 AM PDT            1.20              2         0              Normal
  07/18/2025 07 AM PDT            1.20              2         0              Normal
  07/18/2025 08 AM PDT            1.20              2         0              Normal
  07/18/2025 09 AM PDT            1.20              2         0              Normal
  07/18/2025 10 AM PDT            1.20              2         0              Normal
  07/18/2025 11 AM PDT            1.20              2         0              Normal
  07/18/2025 12 PM PDT            1.20              2         0              Normal
  07/18/2025 01 PM PDT            1.20              2         0              Normal
  07/18/2025 02 PM PDT            1.20              2         0              Normal
  07/18/2025 03 PM PDT            1.20              2         0              Normal
  07/18/2025 04 PM PDT            1.20              2         0              Normal
  07/18/2025 05 PM PDT            1.20              2         0              Normal
  07/18/2025 06 PM PDT            1.20              2         0              Normal
  07/18/2025 07 PM PDT            1.20              2         0              Normal
  07/18/2025 08 PM PDT            1.20              2         0              Normal
  07/18/2025 09 PM PDT            1.20              2         0              Normal
  07/18/2025 10 PM PDT            1.20              2         0              Normal
  07/18/2025 11 PM PDT            1.20              2         0              Normal
  07/19/2025 12 AM PDT            1.20              2         0              Normal
  07/19/2025 01 AM PDT            1.20              2         0              Normal
  07/19/2025 02 AM PDT            1.20              2         0              Normal
  07/19/2025 03 AM PDT            1.20              2         0              Normal
  07/19/2025 04 AM PDT            1.20              2         0              Normal
  07/19/2025 05 AM PDT            1.20              2         0              Normal
  07/19/2025 06 AM PDT            1.20              2         0              Normal
  07/19/2025 07 AM PDT            1.20              2         0              Normal
  07/19/2025 08 AM PDT            1.20              2         0              Normal
  07/19/2025 09 AM PDT            1.20              2         0              Normal
  07/19/2025 10 AM PDT            1.20              2         0              Normal
  07/19/2025 11 AM PDT            1.20              2         0              Normal
  07/19/2025 12 PM PDT            1.20              2         0              Normal
  07/19/2025 01 PM PDT            1.20              2         0              Normal
  07/19/2025 02 PM PDT            1.20              2         0              Normal
  07/19/2025 03 PM PDT            1.20              2         0              Normal
  07/19/2025 04 PM PDT            1.20              2         0              Normal
  07/19/2025 05 PM PDT            1.20              2         0              Normal
  07/19/2025 06 PM PDT            1.20              2         0              Normal
  07/19/2025 07 PM PDT            1.20              2         0              Normal
  07/19/2025 08 PM PDT            1.20              2         0              Normal
  07/19/2025 09 PM PDT            1.20              2         0              Normal
  07/19/2025 10 PM PDT            1.20              2         0              Normal
  07/19/2025 11 PM PDT            1.20              2         0              Normal
  07/20/2025 12 AM PDT            1.20              2         0              Normal
  07/20/2025 01 AM PDT            1.20              2         0              Normal
  07/20/2025 02 AM PDT            1.20              2         0              Normal
  07/20/2025 03 AM PDT            1.20              2         0              Normal
  07/20/2025 04 AM PDT            1.20              2         0              Normal
  07/20/2025 05 AM PDT            1.20              2         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.