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NAPA RIVER - SAINT HELENA (SHEC1)
| Latitude: 38.51º N | Longitude: 122.45º W | Elevation: 195 Feet | | Forecast Type: Official Location |
| Location: Napa County in California | Bulletin Group: Russian Napa | River Group: Russian Napa |
| Issuance Time: | Apr 25 2026 at 8:45 AM PDT | Next Issuance: | Apr 26 2026 at 9:00 AM PDT
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| Action/Monitor: 16.0 Feet | Minor Flood: 18.0 Feet | Moderate Flood: 20.0 Feet | Major Flood: 22.0 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Napa River - Saint Helena (SHEC1)
#
# File Generation Time: 04/25/2026 at 08:45 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/22/2026 at 01:00 PM PDT
# Maximum Observed Stage: 2.42 Feet
# Maximum Observed Flow: 102 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/25/2026 at 09:00 AM PDT
# Maximum Forecast Stage: 2.04 Feet
# Maximum Forecast Flow: 44 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/20/2026 08 AM PDT 1.82 19 Normal
04/20/2026 09 AM PDT 1.82 19 0 Normal
04/20/2026 10 AM PDT 1.82 19 0 Normal
04/20/2026 11 AM PDT 1.82 19 0 Normal
04/20/2026 12 PM PDT 1.82 19 0 Normal
04/20/2026 01 PM PDT 1.82 19 0 Normal
04/20/2026 02 PM PDT 1.83 20 + Normal
04/20/2026 03 PM PDT 1.83 20 0 Normal
04/20/2026 04 PM PDT 1.87 24 + Normal
04/20/2026 05 PM PDT 1.92 29 + Normal
04/20/2026 06 PM PDT 2.03 43 + Normal
04/20/2026 07 PM PDT 2.00 39 - Normal
04/20/2026 08 PM PDT 2.03 43 + Normal
04/20/2026 09 PM PDT 2.03 43 0 Normal
04/20/2026 10 PM PDT 2.09 51 + Normal
04/20/2026 11 PM PDT 2.17 62 + Normal
04/21/2026 12 AM PDT 2.22 70 + Normal
04/21/2026 01 AM PDT 2.26 76 + Normal
04/21/2026 02 AM PDT 2.35 90 + Normal
04/21/2026 03 AM PDT 2.29 80 - Normal
04/21/2026 04 AM PDT 2.30 82 + Normal
04/21/2026 05 AM PDT 2.32 85 + Normal
04/21/2026 06 AM PDT 2.32 85 0 Normal
04/21/2026 07 AM PDT 2.31 83 - Normal
04/21/2026 08 AM PDT 2.30 82 - Normal
04/21/2026 09 AM PDT 2.29 80 - Normal
04/21/2026 10 AM PDT 2.27 77 - Normal
04/21/2026 11 AM PDT 2.26 76 - Normal
04/21/2026 12 PM PDT 2.27 77 + Normal
04/21/2026 01 PM PDT 2.26 76 - Normal
04/21/2026 02 PM PDT 2.26 76 0 Normal
04/21/2026 03 PM PDT 2.25 74 - Normal
04/21/2026 04 PM PDT 2.25 74 0 Normal
04/21/2026 05 PM PDT 2.26 76 + Normal
04/21/2026 06 PM PDT 2.24 73 - Normal
04/21/2026 07 PM PDT 2.23 71 - Normal
04/21/2026 08 PM PDT 2.22 70 - Normal
04/21/2026 09 PM PDT 2.21 68 - Normal
04/21/2026 10 PM PDT 2.21 68 0 Normal
04/21/2026 11 PM PDT 2.20 67 - Normal
04/22/2026 12 AM PDT 2.18 64 - Normal
04/22/2026 01 AM PDT 2.17 62 - Normal
04/22/2026 02 AM PDT 2.16 61 - Normal
04/22/2026 03 AM PDT 2.17 62 + Normal
04/22/2026 04 AM PDT 2.20 67 + Normal
04/22/2026 05 AM PDT 2.20 67 0 Normal
04/22/2026 06 AM PDT 2.20 67 0 Normal
04/22/2026 07 AM PDT 2.25 74 + Normal
04/22/2026 08 AM PDT 2.27 77 + Normal
04/22/2026 09 AM PDT 2.29 80 + Normal
04/22/2026 10 AM PDT 2.34 88 + Normal
04/22/2026 11 AM PDT 2.37 93 + Normal
04/22/2026 12 PM PDT 2.38 95 + Normal
04/22/2026 01 PM PDT 2.42 102 + Normal
04/22/2026 02 PM PDT 2.41 100 - Normal
04/22/2026 03 PM PDT 2.41 100 0 Normal
04/22/2026 04 PM PDT 2.39 97 - Normal
04/22/2026 05 PM PDT 2.38 95 - Normal
04/22/2026 06 PM PDT 2.36 92 - Normal
04/22/2026 07 PM PDT 2.34 88 - Normal
04/22/2026 08 PM PDT 2.33 87 - Normal
04/22/2026 09 PM PDT 2.32 85 - Normal
04/22/2026 10 PM PDT 2.30 82 - Normal
04/22/2026 11 PM PDT 2.29 80 - Normal
04/23/2026 12 AM PDT 2.28 79 - Normal
04/23/2026 01 AM PDT 2.27 77 - Normal
04/23/2026 02 AM PDT 2.26 76 - Normal
04/23/2026 03 AM PDT 2.25 74 - Normal
04/23/2026 04 AM PDT 2.24 73 - Normal
04/23/2026 05 AM PDT 2.23 71 - Normal
04/23/2026 06 AM PDT 2.22 70 - Normal
04/23/2026 07 AM PDT 2.22 70 0 Normal
04/23/2026 08 AM PDT 2.21 68 - Normal
04/23/2026 09 AM PDT 2.20 67 - Normal
04/23/2026 10 AM PDT 2.20 67 0 Normal
04/23/2026 11 AM PDT 2.20 67 0 Normal
04/23/2026 12 PM PDT 2.19 65 - Normal
04/23/2026 01 PM PDT 2.19 65 0 Normal
04/23/2026 02 PM PDT 2.18 64 - Normal
04/23/2026 03 PM PDT 2.17 62 - Normal
04/23/2026 04 PM PDT 2.16 61 - Normal
04/23/2026 05 PM PDT 2.16 61 0 Normal
04/23/2026 06 PM PDT 2.16 61 0 Normal
04/23/2026 07 PM PDT 2.15 60 - Normal
04/23/2026 08 PM PDT 2.14 58 - Normal
04/23/2026 09 PM PDT 2.14 58 0 Normal
04/23/2026 10 PM PDT 2.13 57 - Normal
04/23/2026 11 PM PDT 2.13 57 0 Normal
04/24/2026 12 AM PDT 2.13 57 0 Normal
04/24/2026 01 AM PDT 2.12 55 - Normal
04/24/2026 02 AM PDT 2.12 55 0 Normal
04/24/2026 03 AM PDT 2.12 55 0 Normal
04/24/2026 04 AM PDT 2.12 55 0 Normal
04/24/2026 05 AM PDT 2.11 54 - Normal
04/24/2026 06 AM PDT 2.11 54 0 Normal
04/24/2026 07 AM PDT 2.11 54 0 Normal
04/24/2026 08 AM PDT 2.11 54 0 Normal
04/24/2026 09 AM PDT 2.10 52 - Normal
04/24/2026 10 AM PDT 2.10 52 0 Normal
04/24/2026 11 AM PDT 2.10 52 0 Normal
04/24/2026 12 PM PDT 2.10 52 0 Normal
04/24/2026 01 PM PDT 2.09 51 - Normal
04/24/2026 02 PM PDT 2.09 51 0 Normal
04/24/2026 03 PM PDT 2.08 50 - Normal
04/24/2026 04 PM PDT 2.08 50 0 Normal
04/24/2026 05 PM PDT 2.08 50 0 Normal
04/24/2026 06 PM PDT 2.07 48 - Normal
04/24/2026 07 PM PDT 2.07 48 0 Normal
04/24/2026 08 PM PDT 2.07 48 0 Normal
04/24/2026 09 PM PDT 2.06 47 - Normal
04/24/2026 10 PM PDT 2.06 47 0 Normal
04/24/2026 11 PM PDT 2.06 47 0 Normal
04/25/2026 12 AM PDT 2.06 47 0 Normal
04/25/2026 01 AM PDT 2.06 47 0 Normal
04/25/2026 02 AM PDT 2.06 47 0 Normal
04/25/2026 03 AM PDT 2.06 47 0 Normal
04/25/2026 04 AM PDT 2.05 46 - Normal
04/25/2026 05 AM PDT 2.05 46 0 Normal
04/25/2026 06 AM PDT 2.05 46 0 Normal
04/25/2026 07 AM PDT 2.05 46 0 Normal
04/25/2026 08 AM PDT 2.04 44 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/25/2026 09 AM PDT 2.04 44 Normal
04/25/2026 10 AM PDT 2.04 44 0 Normal
04/25/2026 11 AM PDT 2.04 44 0 Normal
04/25/2026 12 PM PDT 2.04 44 0 Normal
04/25/2026 01 PM PDT 2.03 43 - Normal
04/25/2026 02 PM PDT 2.03 43 0 Normal
04/25/2026 03 PM PDT 2.03 43 0 Normal
04/25/2026 04 PM PDT 2.02 41 - Normal
04/25/2026 05 PM PDT 2.02 41 0 Normal
04/25/2026 06 PM PDT 2.02 41 0 Normal
04/25/2026 07 PM PDT 2.01 40 - Normal
04/25/2026 08 PM PDT 2.01 40 0 Normal
04/25/2026 09 PM PDT 2.01 40 0 Normal
04/25/2026 10 PM PDT 2.00 39 - Normal
04/25/2026 11 PM PDT 2.00 39 0 Normal
04/26/2026 12 AM PDT 2.00 39 0 Normal
04/26/2026 01 AM PDT 2.00 39 0 Normal
04/26/2026 02 AM PDT 1.99 37 - Normal
04/26/2026 03 AM PDT 1.99 37 0 Normal
04/26/2026 04 AM PDT 1.99 37 0 Normal
04/26/2026 05 AM PDT 1.98 36 - Normal
04/26/2026 06 AM PDT 1.98 36 0 Normal
04/26/2026 07 AM PDT 1.98 36 0 Normal
04/26/2026 08 AM PDT 1.97 35 - Normal
04/26/2026 09 AM PDT 1.97 35 0 Normal
04/26/2026 10 AM PDT 1.96 34 - Normal
04/26/2026 11 AM PDT 1.96 34 0 Normal
04/26/2026 12 PM PDT 1.96 34 0 Normal
04/26/2026 01 PM PDT 1.95 33 - Normal
04/26/2026 02 PM PDT 1.95 33 0 Normal
04/26/2026 03 PM PDT 1.95 33 0 Normal
04/26/2026 04 PM PDT 1.94 32 - Normal
04/26/2026 05 PM PDT 1.94 32 0 Normal
04/26/2026 06 PM PDT 1.94 32 0 Normal
04/26/2026 07 PM PDT 1.93 31 - Normal
04/26/2026 08 PM PDT 1.93 31 0 Normal
04/26/2026 09 PM PDT 1.93 31 0 Normal
04/26/2026 10 PM PDT 1.92 29 - Normal
04/26/2026 11 PM PDT 1.92 29 0 Normal
04/27/2026 12 AM PDT 1.92 29 0 Normal
04/27/2026 01 AM PDT 1.91 28 - Normal
04/27/2026 02 AM PDT 1.91 28 0 Normal
04/27/2026 03 AM PDT 1.90 27 - Normal
04/27/2026 04 AM PDT 1.90 27 0 Normal
04/27/2026 05 AM PDT 1.90 27 0 Normal
04/27/2026 06 AM PDT 1.89 26 - Normal
04/27/2026 07 AM PDT 1.89 26 0 Normal
04/27/2026 08 AM PDT 1.88 25 - Normal
04/27/2026 09 AM PDT 1.88 25 0 Normal
04/27/2026 10 AM PDT 1.88 25 0 Normal
04/27/2026 11 AM PDT 1.87 24 - Normal
04/27/2026 12 PM PDT 1.87 24 0 Normal
04/27/2026 01 PM PDT 1.86 23 - Normal
04/27/2026 02 PM PDT 1.86 23 0 Normal
04/27/2026 03 PM PDT 1.86 23 0 Normal
04/27/2026 04 PM PDT 1.85 22 - Normal
04/27/2026 05 PM PDT 1.85 22 0 Normal
04/27/2026 06 PM PDT 1.84 21 - Normal
04/27/2026 07 PM PDT 1.84 21 0 Normal
04/27/2026 08 PM PDT 1.84 21 0 Normal
04/27/2026 09 PM PDT 1.83 20 - Normal
04/27/2026 10 PM PDT 1.83 20 0 Normal
04/27/2026 11 PM PDT 1.83 20 0 Normal
04/28/2026 12 AM PDT 1.82 19 - Normal
04/28/2026 01 AM PDT 1.82 19 0 Normal
04/28/2026 02 AM PDT 1.81 18 - Normal
04/28/2026 03 AM PDT 1.81 18 0 Normal
04/28/2026 04 AM PDT 1.81 18 0 Normal
04/28/2026 05 AM PDT 1.80 17 - Normal
04/28/2026 06 AM PDT 1.80 17 0 Normal
04/28/2026 07 AM PDT 1.80 17 0 Normal
04/28/2026 08 AM PDT 1.80 17 0 Normal
04/28/2026 09 AM PDT 1.80 17 0 Normal
04/28/2026 10 AM PDT 1.80 17 0 Normal
04/28/2026 11 AM PDT 1.80 17 0 Normal
04/28/2026 12 PM PDT 1.80 17 0 Normal
04/28/2026 01 PM PDT 1.80 17 0 Normal
04/28/2026 02 PM PDT 1.80 17 0 Normal
04/28/2026 03 PM PDT 1.80 17 0 Normal
04/28/2026 04 PM PDT 1.79 16 - Normal
04/28/2026 05 PM PDT 1.79 16 0 Normal
04/28/2026 06 PM PDT 1.79 16 0 Normal
04/28/2026 07 PM PDT 1.79 16 0 Normal
04/28/2026 08 PM PDT 1.79 16 0 Normal
04/28/2026 09 PM PDT 1.79 16 0 Normal
04/28/2026 10 PM PDT 1.79 16 0 Normal
04/28/2026 11 PM PDT 1.79 16 0 Normal
04/29/2026 12 AM PDT 1.79 16 0 Normal
04/29/2026 01 AM PDT 1.79 16 0 Normal
04/29/2026 02 AM PDT 1.79 16 0 Normal
04/29/2026 03 AM PDT 1.79 16 0 Normal
04/29/2026 04 AM PDT 1.79 16 0 Normal
04/29/2026 05 AM PDT 1.79 16 0 Normal
04/29/2026 06 AM PDT 1.79 16 0 Normal
04/29/2026 07 AM PDT 1.79 16 0 Normal
04/29/2026 08 AM PDT 1.79 16 0 Normal
04/29/2026 09 AM PDT 1.79 16 0 Normal
04/29/2026 10 AM PDT 1.79 16 0 Normal
04/29/2026 11 AM PDT 1.79 16 0 Normal
04/29/2026 12 PM PDT 1.79 16 0 Normal
04/29/2026 01 PM PDT 1.79 16 0 Normal
04/29/2026 02 PM PDT 1.79 16 0 Normal
04/29/2026 03 PM PDT 1.79 16 0 Normal
04/29/2026 04 PM PDT 1.79 16 0 Normal
04/29/2026 05 PM PDT 1.79 16 0 Normal
04/29/2026 06 PM PDT 1.79 16 0 Normal
04/29/2026 07 PM PDT 1.79 16 0 Normal
04/29/2026 08 PM PDT 1.79 16 0 Normal
04/29/2026 09 PM PDT 1.79 16 0 Normal
04/29/2026 10 PM PDT 1.79 16 0 Normal
04/29/2026 11 PM PDT 1.79 16 0 Normal
04/30/2026 12 AM PDT 1.79 16 0 Normal
04/30/2026 01 AM PDT 1.79 16 0 Normal
04/30/2026 02 AM PDT 1.79 16 0 Normal
04/30/2026 03 AM PDT 1.79 16 0 Normal
04/30/2026 04 AM PDT 1.79 16 0 Normal
04/30/2026 05 AM PDT 1.79 16 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.
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