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: Dec 24 2025 at 2:08 PM PSTNext Issuance: Dec 25 2025 at 9:00 AM 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:  12/24/2025 at 02:08 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  12/21/2025 at 11:00 PM PST
# Maximum Observed Stage:                       10.95 Feet
# Maximum Observed Flow:                        3390 cfs
#
# Earliest Date & Time of Maximum Forecast:     12/26/2025 at 12:00 AM PST
# Maximum Forecast Stage:                       7.18 Feet
# Maximum Forecast Flow:                        1568 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  12/19/2025 02 PM PST            1.67             25                        Normal
  12/19/2025 03 PM PST            1.75             34         +              Normal
  12/19/2025 04 PM PST            1.82             43         +              Normal
  12/19/2025 05 PM PST            1.74             33         -              Normal
  12/19/2025 06 PM PST            1.72             31         -              Normal
  12/19/2025 07 PM PST            1.83             44         +              Normal
  12/19/2025 08 PM PST            1.98             61         +              Normal
  12/19/2025 09 PM PST            2.01             64         +              Normal
  12/19/2025 10 PM PST            2.23             91         +              Normal
  12/19/2025 11 PM PST            2.26             95         +              Normal
  12/20/2025 12 AM PST            2.24             93         -              Normal
  12/20/2025 01 AM PST            2.20             87         -              Normal
  12/20/2025 02 AM PST            2.15             81         -              Normal
  12/20/2025 03 AM PST            2.12             77         -              Normal
  12/20/2025 04 AM PST            2.15             81         +              Normal
  12/20/2025 05 AM PST            2.23             91         +              Normal
  12/20/2025 06 AM PST            2.25             94         +              Normal
  12/20/2025 07 AM PST            2.26             95         +              Normal
  12/20/2025 08 AM PST            2.25             94         -              Normal
  12/20/2025 09 AM PST            2.25             94         0              Normal
  12/20/2025 10 AM PST            2.24             93         -              Normal
  12/20/2025 11 AM PST            2.23             91         -              Normal
  12/20/2025 12 PM PST            2.21             89         -              Normal
  12/20/2025 01 PM PST            2.19             86         -              Normal
  12/20/2025 02 PM PST            2.17             84         -              Normal
  12/20/2025 03 PM PST            2.15             81         -              Normal
  12/20/2025 04 PM PST            2.13             79         -              Normal
  12/20/2025 05 PM PST            2.11             76         -              Normal
  12/20/2025 06 PM PST            2.08             72         -              Normal
  12/20/2025 07 PM PST            2.06             70         -              Normal
  12/20/2025 08 PM PST            2.04             68         -              Normal
  12/20/2025 09 PM PST            2.03             66         -              Normal
  12/20/2025 10 PM PST            2.09             74         +              Normal
  12/20/2025 11 PM PST            2.12             77         +              Normal
  12/21/2025 12 AM PST            2.12             77         0              Normal
  12/21/2025 01 AM PST            2.14             80         +              Normal
  12/21/2025 02 AM PST            2.15             81         +              Normal
  12/21/2025 03 AM PST            2.31            102         +              Normal
  12/21/2025 04 AM PST            2.38            112         +              Normal
  12/21/2025 05 AM PST            2.46            124         +              Normal
  12/21/2025 06 AM PST            2.62            148         +              Normal
  12/21/2025 07 AM PST            2.77            173         +              Normal
  12/21/2025 08 AM PST            3.08            229         +              Normal
  12/21/2025 09 AM PST            3.26            266         +              Normal
  12/21/2025 10 AM PST            3.43            303         +              Normal
  12/21/2025 11 AM PST            3.51            322         +              Normal
  12/21/2025 12 PM PST            3.66            358         +              Normal
  12/21/2025 01 PM PST            3.69            365         +              Normal
  12/21/2025 02 PM PST            3.73            375         +              Normal
  12/21/2025 03 PM PST            3.77            385         +              Normal
  12/21/2025 04 PM PST            3.73            375         -              Normal
  12/21/2025 05 PM PST            4.12            476         +              Normal
  12/21/2025 06 PM PST            4.66            632         +              Normal
  12/21/2025 07 PM PST            5.71            984         +              Normal
  12/21/2025 08 PM PST            6.99           1491         +              Normal
  12/21/2025 09 PM PST            8.61           2194         +              Normal
  12/21/2025 10 PM PST            9.77           2761         +              Normal
  12/21/2025 11 PM PST           10.95           3390         +              Normal
  12/22/2025 12 AM PST           10.71           3258         -              Normal
  12/22/2025 01 AM PST           10.26           3016         -              Normal
  12/22/2025 02 AM PST            9.72           2735         -              Normal
  12/22/2025 03 AM PST            9.24           2495         -              Normal
  12/22/2025 04 AM PST            8.72           2246         -              Normal
  12/22/2025 05 AM PST            8.29           2047         -              Normal
  12/22/2025 06 AM PST            7.81           1834         -              Normal
  12/22/2025 07 AM PST            7.31           1622         -              Normal
  12/22/2025 08 AM PST            6.83           1423         -              Normal
  12/22/2025 09 AM PST            6.46           1271         -              Normal
  12/22/2025 10 AM PST            6.01           1095         -              Normal
  12/22/2025 11 AM PST            5.67            969         -              Normal
  12/22/2025 12 PM PST            5.35            856         -              Normal
  12/22/2025 01 PM PST            5.10            772         -              Normal
  12/22/2025 02 PM PST            4.94            720         -              Normal
  12/22/2025 03 PM PST            4.76            663         -              Normal
  12/22/2025 04 PM PST            4.63            623         -              Normal
  12/22/2025 05 PM PST            4.49            581         -              Normal
  12/22/2025 06 PM PST            4.37            546         -              Normal
  12/22/2025 07 PM PST            4.28            521         -              Normal
  12/22/2025 08 PM PST            4.21            501         -              Normal
  12/22/2025 09 PM PST            4.16            487         -              Normal
  12/22/2025 10 PM PST            4.04            455         -              Normal
  12/22/2025 11 PM PST            3.98            439         -              Normal
  12/23/2025 12 AM PST            3.92            423         -              Normal
  12/23/2025 01 AM PST            3.85            405         -              Normal
  12/23/2025 02 AM PST            3.78            387         -              Normal
  12/23/2025 03 AM PST            3.73            375         -              Normal
  12/23/2025 04 AM PST            3.68            362         -              Normal
  12/23/2025 05 AM PST            3.63            350         -              Normal
  12/23/2025 06 AM PST            3.59            341         -              Normal
  12/23/2025 07 AM PST            3.55            331         -              Normal
  12/23/2025 08 AM PST            3.49            317         -              Normal
  12/23/2025 09 AM PST            3.45            308         -              Normal
  12/23/2025 10 AM PST            3.41            299         -              Normal
  12/23/2025 11 AM PST            3.39            294         -              Normal
  12/23/2025 12 PM PST            3.34            283         -              Normal
  12/23/2025 01 PM PST            3.31            277         -              Normal
  12/23/2025 02 PM PST            3.27            268         -              Normal
  12/23/2025 03 PM PST            3.24            261         -              Normal
  12/23/2025 04 PM PST            3.21            255         -              Normal
  12/23/2025 05 PM PST            3.18            249         -              Normal
  12/23/2025 06 PM PST            3.15            242         -              Normal
  12/23/2025 07 PM PST            3.13            238         -              Normal
  12/23/2025 08 PM PST            3.13            238         0              Normal
  12/23/2025 09 PM PST            3.12            236         -              Normal
  12/23/2025 10 PM PST            3.12            236         0              Normal
  12/23/2025 11 PM PST            3.11            234         -              Normal
  12/24/2025 12 AM PST            3.12            236         +              Normal
  12/24/2025 01 AM PST            3.22            257         +              Normal
  12/24/2025 02 AM PST            3.34            283         +              Normal
  12/24/2025 03 AM PST            3.59            341         +              Normal
  12/24/2025 04 AM PST            4.17            490         +              Normal
  12/24/2025 05 AM PST            4.53            593         +              Normal
  12/24/2025 06 AM PST            4.58            608         +              Normal
  12/24/2025 07 AM PST            4.68            638         +              Normal
  12/24/2025 08 AM PST            4.68            638         0              Normal
  12/24/2025 09 AM PST            4.63            623         -              Normal
  12/24/2025 10 AM PST            4.49            581         -              Normal
  12/24/2025 11 AM PST            4.34            538         -              Normal
  12/24/2025 12 PM PST            4.23            507         -              Normal
  12/24/2025 01 PM PST            4.08            465         -              Normal
  12/24/2025 02 PM PST            4.00            444         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  12/24/2025 03 PM PST            4.00            444                        Normal
  12/24/2025 04 PM PST            3.95            431         -              Normal
  12/24/2025 05 PM PST            3.92            423         -              Normal
  12/24/2025 06 PM PST            3.92            423         0              Normal
  12/24/2025 07 PM PST            3.95            431         +              Normal
  12/24/2025 08 PM PST            3.97            436         +              Normal
  12/24/2025 09 PM PST            3.99            441         +              Normal
  12/24/2025 10 PM PST            3.93            426         -              Normal
  12/24/2025 11 PM PST            3.93            426         0              Normal
  12/25/2025 12 AM PST            4.11            473         +              Normal
  12/25/2025 01 AM PST            4.58            608         +              Normal
  12/25/2025 02 AM PST            4.93            717         +              Normal
  12/25/2025 03 AM PST            5.03            749         +              Normal
  12/25/2025 04 AM PST            5.08            765         +              Normal
  12/25/2025 05 AM PST            5.30            839         +              Normal
  12/25/2025 06 AM PST            5.92           1061         +              Normal
  12/25/2025 07 AM PST            6.66           1353         +              Normal
  12/25/2025 08 AM PST            7.01           1500         +              Normal
  12/25/2025 09 AM PST            6.88           1445         -              Normal
  12/25/2025 10 AM PST            6.52           1295         -              Normal
  12/25/2025 11 AM PST            6.17           1156         -              Normal
  12/25/2025 12 PM PST            5.98           1084         -              Normal
  12/25/2025 01 PM PST            5.93           1065         -              Normal
  12/25/2025 02 PM PST            5.96           1076         +              Normal
  12/25/2025 03 PM PST            6.04           1106         +              Normal
  12/25/2025 04 PM PST            6.09           1126         +              Normal
  12/25/2025 05 PM PST            6.04           1106         -              Normal
  12/25/2025 06 PM PST            5.93           1065         -              Normal
  12/25/2025 07 PM PST            5.86           1039         -              Normal
  12/25/2025 08 PM PST            5.97           1080         +              Normal
  12/25/2025 09 PM PST            6.38           1239         +              Normal
  12/25/2025 10 PM PST            6.83           1423         +              Normal
  12/25/2025 11 PM PST            7.10           1536         +              Normal
  12/26/2025 12 AM PST            7.18           1568         +              Normal
  12/26/2025 01 AM PST            7.12           1544         -              Normal
  12/26/2025 02 AM PST            6.97           1483         -              Normal
  12/26/2025 03 AM PST            6.78           1402         -              Normal
  12/26/2025 04 AM PST            6.61           1332         -              Normal
  12/26/2025 05 AM PST            6.48           1279         -              Normal
  12/26/2025 06 AM PST            6.37           1235         -              Normal
  12/26/2025 07 AM PST            6.25           1188         -              Normal
  12/26/2025 08 AM PST            6.16           1153         -              Normal
  12/26/2025 09 AM PST            6.13           1141         -              Normal
  12/26/2025 10 AM PST            6.14           1145         +              Normal
  12/26/2025 11 AM PST            6.12           1137         -              Normal
  12/26/2025 12 PM PST            6.07           1118         -              Normal
  12/26/2025 01 PM PST            6.00           1091         -              Normal
  12/26/2025 02 PM PST            5.93           1065         -              Normal
  12/26/2025 03 PM PST            5.88           1046         -              Normal
  12/26/2025 04 PM PST            5.86           1039         -              Normal
  12/26/2025 05 PM PST            5.84           1031         -              Normal
  12/26/2025 06 PM PST            5.82           1024         -              Normal
  12/26/2025 07 PM PST            5.82           1024         0              Normal
  12/26/2025 08 PM PST            5.82           1024         0              Normal
  12/26/2025 09 PM PST            5.76           1002         -              Normal
  12/26/2025 10 PM PST            5.62            951         -              Normal
  12/26/2025 11 PM PST            5.46            894         -              Normal
  12/27/2025 12 AM PST            5.33            849         -              Normal
  12/27/2025 01 AM PST            5.23            815         -              Normal
  12/27/2025 02 AM PST            5.15            789         -              Normal
  12/27/2025 03 AM PST            5.07            762         -              Normal
  12/27/2025 04 AM PST            4.97            730         -              Normal
  12/27/2025 05 AM PST            4.87            698         -              Normal
  12/27/2025 06 AM PST            4.79            672         -              Normal
  12/27/2025 07 AM PST            4.72            651         -              Normal
  12/27/2025 08 AM PST            4.65            629         -              Normal
  12/27/2025 09 AM PST            4.57            605         -              Normal
  12/27/2025 10 AM PST            4.47            575         -              Normal
  12/27/2025 11 AM PST            4.37            546         -              Normal
  12/27/2025 12 PM PST            4.28            521         -              Normal
  12/27/2025 01 PM PST            4.21            501         -              Normal
  12/27/2025 02 PM PST            4.17            490         -              Normal
  12/27/2025 03 PM PST            4.13            479         -              Normal
  12/27/2025 04 PM PST            4.08            465         -              Normal
  12/27/2025 05 PM PST            4.04            455         -              Normal
  12/27/2025 06 PM PST            3.99            441         -              Normal
  12/27/2025 07 PM PST            3.94            428         -              Normal
  12/27/2025 08 PM PST            3.90            418         -              Normal
  12/27/2025 09 PM PST            3.85            405         -              Normal
  12/27/2025 10 PM PST            3.81            395         -              Normal
  12/27/2025 11 PM PST            3.77            385         -              Normal
  12/28/2025 12 AM PST            3.73            375         -              Normal
  12/28/2025 01 AM PST            3.70            367         -              Normal
  12/28/2025 02 AM PST            3.66            358         -              Normal
  12/28/2025 03 AM PST            3.63            350         -              Normal
  12/28/2025 04 AM PST            3.59            341         -              Normal
  12/28/2025 05 AM PST            3.56            334         -              Normal
  12/28/2025 06 AM PST            3.53            327         -              Normal
  12/28/2025 07 AM PST            3.50            319         -              Normal
  12/28/2025 08 AM PST            3.47            313         -              Normal
  12/28/2025 09 AM PST            3.44            306         -              Normal
  12/28/2025 10 AM PST            3.42            301         -              Normal
  12/28/2025 11 AM PST            3.40            297         -              Normal
  12/28/2025 12 PM PST            3.38            292         -              Normal
  12/28/2025 01 PM PST            3.37            290         -              Normal
  12/28/2025 02 PM PST            3.35            285         -              Normal
  12/28/2025 03 PM PST            3.33            281         -              Normal
  12/28/2025 04 PM PST            3.31            277         -              Normal
  12/28/2025 05 PM PST            3.29            272         -              Normal
  12/28/2025 06 PM PST            3.27            268         -              Normal
  12/28/2025 07 PM PST            3.25            264         -              Normal
  12/28/2025 08 PM PST            3.23            259         -              Normal
  12/28/2025 09 PM PST            3.21            255         -              Normal
  12/28/2025 10 PM PST            3.19            251         -              Normal
  12/28/2025 11 PM PST            3.17            246         -              Normal
  12/29/2025 12 AM PST            3.16            244         -              Normal
  12/29/2025 01 AM PST            3.14            240         -              Normal
  12/29/2025 02 AM PST            3.12            236         -              Normal
  12/29/2025 03 AM PST            3.11            234         -              Normal
  12/29/2025 04 AM PST            3.09            231         -              Normal
  12/29/2025 05 AM PST            3.08            229         -              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.