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: Jan 21 2026 at 7:12 AM PSTNext Issuance: Jan 21 2026 at 3:00 PM PST
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:  01/21/2026 at 07:12 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  01/16/2026 at 09:00 AM PST
# Maximum Observed Stage:                       2.32 Feet
# Maximum Observed Flow:                        145 cfs
#
# Earliest Date & Time of Maximum Forecast:     01/21/2026 at 08:00 AM PST
# Maximum Forecast Stage:                       2.13 Feet
# Maximum Forecast Flow:                        116 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  01/16/2026 07 AM PST            2.32            145                        Normal
  01/16/2026 08 AM PST            2.32            145         0              Normal
  01/16/2026 09 AM PST            2.32            145         0              Normal
  01/16/2026 10 AM PST            2.31            143         -              Normal
  01/16/2026 11 AM PST            2.31            143         0              Normal
  01/16/2026 12 PM PST            2.31            143         0              Normal
  01/16/2026 01 PM PST            2.31            143         0              Normal
  01/16/2026 02 PM PST            2.30            142         -              Normal
  01/16/2026 03 PM PST            2.31            143         +              Normal
  01/16/2026 04 PM PST            2.30            142         -              Normal
  01/16/2026 05 PM PST            2.30            142         0              Normal
  01/16/2026 06 PM PST            2.30            142         0              Normal
  01/16/2026 07 PM PST            2.29            140         -              Normal
  01/16/2026 08 PM PST            2.28            139         -              Normal
  01/16/2026 09 PM PST            2.28            139         0              Normal
  01/16/2026 10 PM PST            2.27            137         -              Normal
  01/16/2026 11 PM PST            2.28            139         +              Normal
  01/17/2026 12 AM PST            2.27            137         -              Normal
  01/17/2026 01 AM PST            2.27            137         0              Normal
  01/17/2026 02 AM PST            2.26            136         -              Normal
  01/17/2026 03 AM PST            2.26            136         0              Normal
  01/17/2026 04 AM PST            2.26            136         0              Normal
  01/17/2026 05 AM PST            2.26            136         0              Normal
  01/17/2026 06 AM PST            2.26            136         0              Normal
  01/17/2026 07 AM PST            2.26            136         0              Normal
  01/17/2026 08 AM PST            2.25            134         -              Normal
  01/17/2026 09 AM PST            2.25            134         0              Normal
  01/17/2026 10 AM PST            2.25            134         0              Normal
  01/17/2026 11 AM PST            2.25            134         0              Normal
  01/17/2026 12 PM PST            2.25            134         0              Normal
  01/17/2026 01 PM PST            2.25            134         0              Normal
  01/17/2026 02 PM PST            2.25            134         0              Normal
  01/17/2026 03 PM PST            2.24            133         -              Normal
  01/17/2026 04 PM PST            2.24            133         0              Normal
  01/17/2026 05 PM PST            2.25            134         +              Normal
  01/17/2026 06 PM PST            2.24            133         -              Normal
  01/17/2026 07 PM PST            2.24            133         0              Normal
  01/17/2026 08 PM PST            2.24            133         0              Normal
  01/17/2026 09 PM PST            2.23            131         -              Normal
  01/17/2026 10 PM PST            2.23            131         0              Normal
  01/17/2026 11 PM PST            2.23            131         0              Normal
  01/18/2026 12 AM PST            2.22            130         -              Normal
  01/18/2026 01 AM PST            2.22            130         0              Normal
  01/18/2026 02 AM PST            2.22            130         0              Normal
  01/18/2026 03 AM PST            2.22            130         0              Normal
  01/18/2026 04 AM PST            2.22            130         0              Normal
  01/18/2026 05 AM PST            2.22            130         0              Normal
  01/18/2026 06 AM PST            2.22            130         0              Normal
  01/18/2026 07 AM PST            2.21            128         -              Normal
  01/18/2026 08 AM PST            2.21            128         0              Normal
  01/18/2026 09 AM PST            2.22            130         +              Normal
  01/18/2026 10 AM PST            2.21            128         -              Normal
  01/18/2026 11 AM PST            2.21            128         0              Normal
  01/18/2026 12 PM PST            2.21            128         0              Normal
  01/18/2026 01 PM PST            2.21            128         0              Normal
  01/18/2026 02 PM PST            2.21            128         0              Normal
  01/18/2026 03 PM PST            2.21            128         0              Normal
  01/18/2026 04 PM PST            2.21            128         0              Normal
  01/18/2026 05 PM PST            2.21            128         0              Normal
  01/18/2026 06 PM PST            2.21            128         0              Normal
  01/18/2026 07 PM PST            2.20            127         -              Normal
  01/18/2026 08 PM PST            2.20            127         0              Normal
  01/18/2026 09 PM PST            2.20            127         0              Normal
  01/18/2026 10 PM PST            2.20            127         0              Normal
  01/18/2026 11 PM PST            2.19            125         -              Normal
  01/19/2026 12 AM PST            2.19            125         0              Normal
  01/19/2026 01 AM PST            2.19            125         0              Normal
  01/19/2026 02 AM PST            2.19            125         0              Normal
  01/19/2026 03 AM PST            2.19            125         0              Normal
  01/19/2026 04 AM PST            2.19            125         0              Normal
  01/19/2026 05 AM PST            2.18            124         -              Normal
  01/19/2026 06 AM PST            2.18            124         0              Normal
  01/19/2026 07 AM PST            2.18            124         0              Normal
  01/19/2026 08 AM PST            2.18            124         0              Normal
  01/19/2026 09 AM PST            2.18            124         0              Normal
  01/19/2026 10 AM PST            2.18            124         0              Normal
  01/19/2026 11 AM PST            2.18            124         0              Normal
  01/19/2026 12 PM PST            2.18            124         0              Normal
  01/19/2026 01 PM PST            2.18            124         0              Normal
  01/19/2026 02 PM PST            2.18            124         0              Normal
  01/19/2026 03 PM PST            2.17            122         -              Normal
  01/19/2026 04 PM PST            2.17            122         0              Normal
  01/19/2026 05 PM PST            2.17            122         0              Normal
  01/19/2026 06 PM PST            2.17            122         0              Normal
  01/19/2026 07 PM PST            2.17            122         0              Normal
  01/19/2026 08 PM PST            2.17            122         0              Normal
  01/19/2026 09 PM PST            2.17            122         0              Normal
  01/19/2026 10 PM PST            2.17            122         0              Normal
  01/19/2026 11 PM PST            2.17            122         0              Normal
  01/20/2026 12 AM PST            2.17            122         0              Normal
  01/20/2026 01 AM PST            2.16            121         -              Normal
  01/20/2026 02 AM PST            2.16            121         0              Normal
  01/20/2026 03 AM PST            2.17            122         +              Normal
  01/20/2026 04 AM PST            2.16            121         -              Normal
  01/20/2026 05 AM PST            2.16            121         0              Normal
  01/20/2026 06 AM PST            2.16            121         0              Normal
  01/20/2026 07 AM PST            2.16            121         0              Normal
  01/20/2026 08 AM PST            2.16            121         0              Normal
  01/20/2026 09 AM PST            2.16            121         0              Normal
  01/20/2026 10 AM PST            2.15            119         -              Normal
  01/20/2026 11 AM PST            2.15            119         0              Normal
  01/20/2026 12 PM PST            2.15            119         0              Normal
  01/20/2026 01 PM PST            2.16            121         +              Normal
  01/20/2026 02 PM PST            2.15            119         -              Normal
  01/20/2026 03 PM PST            2.15            119         0              Normal
  01/20/2026 04 PM PST            2.15            119         0              Normal
  01/20/2026 05 PM PST            2.15            119         0              Normal
  01/20/2026 06 PM PST            2.15            119         0              Normal
  01/20/2026 07 PM PST            2.15            119         0              Normal
  01/20/2026 08 PM PST            2.15            119         0              Normal
  01/20/2026 09 PM PST            2.14            118         -              Normal
  01/20/2026 10 PM PST            2.14            118         0              Normal
  01/20/2026 11 PM PST            2.14            118         0              Normal
  01/21/2026 12 AM PST            2.13            116         -              Normal
  01/21/2026 01 AM PST            2.13            116         0              Normal
  01/21/2026 02 AM PST            2.13            116         0              Normal
  01/21/2026 03 AM PST            2.13            116         0              Normal
  01/21/2026 04 AM PST            2.13            116         0              Normal
  01/21/2026 05 AM PST            2.13            116         0              Normal
  01/21/2026 06 AM PST            2.13            116         0              Normal
  01/21/2026 07 AM PST            2.13            116         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  01/21/2026 08 AM PST            2.13            116                        Normal
  01/21/2026 09 AM PST            2.12            115         -              Normal
  01/21/2026 10 AM PST            2.12            115         0              Normal
  01/21/2026 11 AM PST            2.12            115         0              Normal
  01/21/2026 12 PM PST            2.12            115         0              Normal
  01/21/2026 01 PM PST            2.12            115         0              Normal
  01/21/2026 02 PM PST            2.12            115         0              Normal
  01/21/2026 03 PM PST            2.12            115         0              Normal
  01/21/2026 04 PM PST            2.11            113         -              Normal
  01/21/2026 05 PM PST            2.11            113         0              Normal
  01/21/2026 06 PM PST            2.11            113         0              Normal
  01/21/2026 07 PM PST            2.11            113         0              Normal
  01/21/2026 08 PM PST            2.11            113         0              Normal
  01/21/2026 09 PM PST            2.10            112         -              Normal
  01/21/2026 10 PM PST            2.10            112         0              Normal
  01/21/2026 11 PM PST            2.10            112         0              Normal
  01/22/2026 12 AM PST            2.10            112         0              Normal
  01/22/2026 01 AM PST            2.10            112         0              Normal
  01/22/2026 02 AM PST            2.10            112         0              Normal
  01/22/2026 03 AM PST            2.10            112         0              Normal
  01/22/2026 04 AM PST            2.09            110         -              Normal
  01/22/2026 05 AM PST            2.09            110         0              Normal
  01/22/2026 06 AM PST            2.09            110         0              Normal
  01/22/2026 07 AM PST            2.09            110         0              Normal
  01/22/2026 08 AM PST            2.09            110         0              Normal
  01/22/2026 09 AM PST            2.09            110         0              Normal
  01/22/2026 10 AM PST            2.08            109         -              Normal
  01/22/2026 11 AM PST            2.08            109         0              Normal
  01/22/2026 12 PM PST            2.08            109         0              Normal
  01/22/2026 01 PM PST            2.08            109         0              Normal
  01/22/2026 02 PM PST            2.08            109         0              Normal
  01/22/2026 03 PM PST            2.08            109         0              Normal
  01/22/2026 04 PM PST            2.08            109         0              Normal
  01/22/2026 05 PM PST            2.07            108         -              Normal
  01/22/2026 06 PM PST            2.07            108         0              Normal
  01/22/2026 07 PM PST            2.07            108         0              Normal
  01/22/2026 08 PM PST            2.07            108         0              Normal
  01/22/2026 09 PM PST            2.07            108         0              Normal
  01/22/2026 10 PM PST            2.07            108         0              Normal
  01/22/2026 11 PM PST            2.06            106         -              Normal
  01/23/2026 12 AM PST            2.06            106         0              Normal
  01/23/2026 01 AM PST            2.06            106         0              Normal
  01/23/2026 02 AM PST            2.06            106         0              Normal
  01/23/2026 03 AM PST            2.06            106         0              Normal
  01/23/2026 04 AM PST            2.06            106         0              Normal
  01/23/2026 05 AM PST            2.06            106         0              Normal
  01/23/2026 06 AM PST            2.05            105         -              Normal
  01/23/2026 07 AM PST            2.05            105         0              Normal
  01/23/2026 08 AM PST            2.05            105         0              Normal
  01/23/2026 09 AM PST            2.05            105         0              Normal
  01/23/2026 10 AM PST            2.05            105         0              Normal
  01/23/2026 11 AM PST            2.05            105         0              Normal
  01/23/2026 12 PM PST            2.05            105         0              Normal
  01/23/2026 01 PM PST            2.04            103         -              Normal
  01/23/2026 02 PM PST            2.04            103         0              Normal
  01/23/2026 03 PM PST            2.04            103         0              Normal
  01/23/2026 04 PM PST            2.04            103         0              Normal
  01/23/2026 05 PM PST            2.04            103         0              Normal
  01/23/2026 06 PM PST            2.04            103         0              Normal
  01/23/2026 07 PM PST            2.04            103         0              Normal
  01/23/2026 08 PM PST            2.03            102         -              Normal
  01/23/2026 09 PM PST            2.03            102         0              Normal
  01/23/2026 10 PM PST            2.03            102         0              Normal
  01/23/2026 11 PM PST            2.03            102         0              Normal
  01/24/2026 12 AM PST            2.03            102         0              Normal
  01/24/2026 01 AM PST            2.03            102         0              Normal
  01/24/2026 02 AM PST            2.03            102         0              Normal
  01/24/2026 03 AM PST            2.02            101         -              Normal
  01/24/2026 04 AM PST            2.02            101         0              Normal
  01/24/2026 05 AM PST            2.02            101         0              Normal
  01/24/2026 06 AM PST            2.02            101         0              Normal
  01/24/2026 07 AM PST            2.02            101         0              Normal
  01/24/2026 08 AM PST            2.02            101         0              Normal
  01/24/2026 09 AM PST            2.02            101         0              Normal
  01/24/2026 10 AM PST            2.02            101         0              Normal
  01/24/2026 11 AM PST            2.01             99         -              Normal
  01/24/2026 12 PM PST            2.01             99         0              Normal
  01/24/2026 01 PM PST            2.01             99         0              Normal
  01/24/2026 02 PM PST            2.01             99         0              Normal
  01/24/2026 03 PM PST            2.01             99         0              Normal
  01/24/2026 04 PM PST            2.01             99         0              Normal
  01/24/2026 05 PM PST            2.01             99         0              Normal
  01/24/2026 06 PM PST            2.00             98         -              Normal
  01/24/2026 07 PM PST            2.00             98         0              Normal
  01/24/2026 08 PM PST            2.00             98         0              Normal
  01/24/2026 09 PM PST            2.00             98         0              Normal
  01/24/2026 10 PM PST            2.00             98         0              Normal
  01/24/2026 11 PM PST            2.00             98         0              Normal
  01/25/2026 12 AM PST            2.00             98         0              Normal
  01/25/2026 01 AM PST            2.00             98         0              Normal
  01/25/2026 02 AM PST            1.99             97         -              Normal
  01/25/2026 03 AM PST            1.99             97         0              Normal
  01/25/2026 04 AM PST            1.99             97         0              Normal
  01/25/2026 05 AM PST            1.99             97         0              Normal
  01/25/2026 06 AM PST            1.99             97         0              Normal
  01/25/2026 07 AM PST            1.99             97         0              Normal
  01/25/2026 08 AM PST            1.99             97         0              Normal
  01/25/2026 09 AM PST            1.99             97         0              Normal
  01/25/2026 10 AM PST            1.98             95         -              Normal
  01/25/2026 11 AM PST            1.98             95         0              Normal
  01/25/2026 12 PM PST            1.98             95         0              Normal
  01/25/2026 01 PM PST            1.98             95         0              Normal
  01/25/2026 02 PM PST            1.98             95         0              Normal
  01/25/2026 03 PM PST            1.98             95         0              Normal
  01/25/2026 04 PM PST            1.98             95         0              Normal
  01/25/2026 05 PM PST            1.98             95         0              Normal
  01/25/2026 06 PM PST            1.97             94         -              Normal
  01/25/2026 07 PM PST            1.97             94         0              Normal
  01/25/2026 08 PM PST            1.97             94         0              Normal
  01/25/2026 09 PM PST            1.97             94         0              Normal
  01/25/2026 10 PM PST            1.97             94         0              Normal
  01/25/2026 11 PM PST            1.97             94         0              Normal
  01/26/2026 12 AM PST            1.97             94         0              Normal
  01/26/2026 01 AM PST            1.97             94         0              Normal
  01/26/2026 02 AM PST            1.96             93         -              Normal
  01/26/2026 03 AM PST            1.96             93         0              Normal
  01/26/2026 04 AM PST            1.96             93         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.