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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 16 2026 at 7:19 AM PDT | Next Issuance: | Apr 17 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: 04/16/2026 at 07:19 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/11/2026 at 11:00 PM PDT
# Maximum Observed Stage: 2.43 Feet
# Maximum Observed Flow: 103 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/20/2026 at 10:00 PM PDT
# Maximum Forecast Stage: 1.91 Feet
# Maximum Forecast Flow: 28 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/11/2026 07 AM PDT 1.88 25 Normal
04/11/2026 08 AM PDT 1.87 24 - Normal
04/11/2026 09 AM PDT 1.87 24 0 Normal
04/11/2026 10 AM PDT 1.86 23 - Normal
04/11/2026 11 AM PDT 1.86 23 0 Normal
04/11/2026 12 PM PDT 1.87 24 + Normal
04/11/2026 01 PM PDT 1.89 26 + Normal
04/11/2026 02 PM PDT 1.87 24 - Normal
04/11/2026 03 PM PDT 1.88 25 + Normal
04/11/2026 04 PM PDT 1.88 25 0 Normal
04/11/2026 05 PM PDT 1.97 35 + Normal
04/11/2026 06 PM PDT 2.31 83 + Normal
04/11/2026 07 PM PDT 2.29 80 - Normal
04/11/2026 08 PM PDT 2.30 82 + Normal
04/11/2026 09 PM PDT 2.31 83 + Normal
04/11/2026 10 PM PDT 2.31 83 0 Normal
04/11/2026 11 PM PDT 2.43 103 + Normal
04/12/2026 12 AM PDT 2.41 100 - Normal
04/12/2026 01 AM PDT 2.37 93 - Normal
04/12/2026 02 AM PDT 2.36 92 - Normal
04/12/2026 03 AM PDT 2.30 82 - Normal
04/12/2026 04 AM PDT 2.28 79 - Normal
04/12/2026 05 AM PDT 2.26 76 - Normal
04/12/2026 06 AM PDT 2.24 73 - Normal
04/12/2026 07 AM PDT 2.24 73 0 Normal
04/12/2026 08 AM PDT 2.21 68 - Normal
04/12/2026 09 AM PDT 2.20 67 - Normal
04/12/2026 10 AM PDT 2.24 73 + Normal
04/12/2026 11 AM PDT 2.22 70 - Normal
04/12/2026 12 PM PDT 2.24 73 + Normal
04/12/2026 01 PM PDT 2.25 74 + Normal
04/12/2026 02 PM PDT 2.26 76 + Normal
04/12/2026 03 PM PDT 2.30 82 + Normal
04/12/2026 04 PM PDT 2.35 90 + Normal
04/12/2026 05 PM PDT 2.36 92 + Normal
04/12/2026 06 PM PDT 2.34 88 - Normal
04/12/2026 07 PM PDT 2.32 85 - Normal
04/12/2026 08 PM PDT 2.31 83 - Normal
04/12/2026 09 PM PDT 2.29 80 - Normal
04/12/2026 10 PM PDT 2.29 80 0 Normal
04/12/2026 11 PM PDT 2.26 76 - Normal
04/13/2026 12 AM PDT 2.24 73 - Normal
04/13/2026 01 AM PDT 2.22 70 - Normal
04/13/2026 02 AM PDT 2.20 67 - Normal
04/13/2026 03 AM PDT 2.18 64 - Normal
04/13/2026 04 AM PDT 2.16 61 - Normal
04/13/2026 05 AM PDT 2.15 60 - Normal
04/13/2026 06 AM PDT 2.14 58 - Normal
04/13/2026 07 AM PDT 2.12 55 - Normal
04/13/2026 08 AM PDT 2.11 54 - Normal
04/13/2026 09 AM PDT 2.10 52 - Normal
04/13/2026 10 AM PDT 2.09 51 - Normal
04/13/2026 11 AM PDT 2.08 50 - Normal
04/13/2026 12 PM PDT 2.08 50 0 Normal
04/13/2026 01 PM PDT 2.07 48 - Normal
04/13/2026 02 PM PDT 2.06 47 - Normal
04/13/2026 03 PM PDT 2.05 46 - Normal
04/13/2026 04 PM PDT 2.04 44 - Normal
04/13/2026 05 PM PDT 2.04 44 0 Normal
04/13/2026 06 PM PDT 2.03 43 - Normal
04/13/2026 07 PM PDT 2.02 41 - Normal
04/13/2026 08 PM PDT 2.02 41 0 Normal
04/13/2026 09 PM PDT 2.02 41 0 Normal
04/13/2026 10 PM PDT 2.01 40 - Normal
04/13/2026 11 PM PDT 2.00 39 - Normal
04/14/2026 12 AM PDT 2.00 39 0 Normal
04/14/2026 01 AM PDT 2.00 39 0 Normal
04/14/2026 02 AM PDT 1.99 37 - Normal
04/14/2026 03 AM PDT 1.99 37 0 Normal
04/14/2026 04 AM PDT 1.98 36 - Normal
04/14/2026 05 AM PDT 1.98 36 0 Normal
04/14/2026 06 AM PDT 1.98 36 0 Normal
04/14/2026 07 AM PDT 1.97 35 - Normal
04/14/2026 08 AM PDT 1.97 35 0 Normal
04/14/2026 09 AM PDT 1.97 35 0 Normal
04/14/2026 10 AM PDT 1.97 35 0 Normal
04/14/2026 11 AM PDT 1.96 34 - Normal
04/14/2026 12 PM PDT 1.96 34 0 Normal
04/14/2026 01 PM PDT 1.96 34 0 Normal
04/14/2026 02 PM PDT 1.96 34 0 Normal
04/14/2026 03 PM PDT 1.96 34 0 Normal
04/14/2026 04 PM PDT 1.96 34 0 Normal
04/14/2026 05 PM PDT 1.95 33 - Normal
04/14/2026 06 PM PDT 1.95 33 0 Normal
04/14/2026 07 PM PDT 1.94 32 - Normal
04/14/2026 08 PM PDT 1.94 32 0 Normal
04/14/2026 09 PM PDT 1.94 32 0 Normal
04/14/2026 10 PM PDT 1.94 32 0 Normal
04/14/2026 11 PM PDT 1.93 31 - Normal
04/15/2026 12 AM PDT 1.93 31 0 Normal
04/15/2026 01 AM PDT 1.93 31 0 Normal
04/15/2026 02 AM PDT 1.93 31 0 Normal
04/15/2026 03 AM PDT 1.93 31 0 Normal
04/15/2026 04 AM PDT 1.93 31 0 Normal
04/15/2026 05 AM PDT 1.93 31 0 Normal
04/15/2026 06 AM PDT 1.93 31 0 Normal
04/15/2026 07 AM PDT 1.92 29 - Normal
04/15/2026 08 AM PDT 1.92 29 0 Normal
04/15/2026 09 AM PDT 1.93 31 + Normal
04/15/2026 10 AM PDT 1.93 31 0 Normal
04/15/2026 11 AM PDT 1.92 29 - Normal
04/15/2026 12 PM PDT 1.92 29 0 Normal
04/15/2026 01 PM PDT 1.92 29 0 Normal
04/15/2026 02 PM PDT 1.92 29 0 Normal
04/15/2026 03 PM PDT 1.92 29 0 Normal
04/15/2026 04 PM PDT 1.92 29 0 Normal
04/15/2026 05 PM PDT 1.92 29 0 Normal
04/15/2026 06 PM PDT 1.91 28 - Normal
04/15/2026 07 PM PDT 1.91 28 0 Normal
04/15/2026 08 PM PDT 1.91 28 0 Normal
04/15/2026 09 PM PDT 1.91 28 0 Normal
04/15/2026 10 PM PDT 1.91 28 0 Normal
04/15/2026 11 PM PDT 1.91 28 0 Normal
04/16/2026 12 AM PDT 1.91 28 0 Normal
04/16/2026 01 AM PDT 1.90 27 - Normal
04/16/2026 02 AM PDT 1.90 27 0 Normal
04/16/2026 03 AM PDT 1.90 27 0 Normal
04/16/2026 04 AM PDT 1.90 27 0 Normal
04/16/2026 05 AM PDT 1.90 27 0 Normal
04/16/2026 06 AM PDT 1.90 27 0 Normal
04/16/2026 07 AM PDT 1.90 27 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/16/2026 08 AM PDT 1.90 27 Normal
04/16/2026 09 AM PDT 1.90 27 0 Normal
04/16/2026 10 AM PDT 1.90 27 0 Normal
04/16/2026 11 AM PDT 1.90 27 0 Normal
04/16/2026 12 PM PDT 1.90 27 0 Normal
04/16/2026 01 PM PDT 1.90 27 0 Normal
04/16/2026 02 PM PDT 1.89 26 - Normal
04/16/2026 03 PM PDT 1.89 26 0 Normal
04/16/2026 04 PM PDT 1.89 26 0 Normal
04/16/2026 05 PM PDT 1.89 26 0 Normal
04/16/2026 06 PM PDT 1.89 26 0 Normal
04/16/2026 07 PM PDT 1.89 26 0 Normal
04/16/2026 08 PM PDT 1.89 26 0 Normal
04/16/2026 09 PM PDT 1.89 26 0 Normal
04/16/2026 10 PM PDT 1.89 26 0 Normal
04/16/2026 11 PM PDT 1.89 26 0 Normal
04/17/2026 12 AM PDT 1.89 26 0 Normal
04/17/2026 01 AM PDT 1.89 26 0 Normal
04/17/2026 02 AM PDT 1.89 26 0 Normal
04/17/2026 03 AM PDT 1.89 26 0 Normal
04/17/2026 04 AM PDT 1.88 25 - Normal
04/17/2026 05 AM PDT 1.88 25 0 Normal
04/17/2026 06 AM PDT 1.88 25 0 Normal
04/17/2026 07 AM PDT 1.88 25 0 Normal
04/17/2026 08 AM PDT 1.88 25 0 Normal
04/17/2026 09 AM PDT 1.88 25 0 Normal
04/17/2026 10 AM PDT 1.88 25 0 Normal
04/17/2026 11 AM PDT 1.88 25 0 Normal
04/17/2026 12 PM PDT 1.88 25 0 Normal
04/17/2026 01 PM PDT 1.88 25 0 Normal
04/17/2026 02 PM PDT 1.88 25 0 Normal
04/17/2026 03 PM PDT 1.88 25 0 Normal
04/17/2026 04 PM PDT 1.88 25 0 Normal
04/17/2026 05 PM PDT 1.88 25 0 Normal
04/17/2026 06 PM PDT 1.87 24 - Normal
04/17/2026 07 PM PDT 1.87 24 0 Normal
04/17/2026 08 PM PDT 1.87 24 0 Normal
04/17/2026 09 PM PDT 1.87 24 0 Normal
04/17/2026 10 PM PDT 1.87 24 0 Normal
04/17/2026 11 PM PDT 1.87 24 0 Normal
04/18/2026 12 AM PDT 1.87 24 0 Normal
04/18/2026 01 AM PDT 1.87 24 0 Normal
04/18/2026 02 AM PDT 1.87 24 0 Normal
04/18/2026 03 AM PDT 1.87 24 0 Normal
04/18/2026 04 AM PDT 1.87 24 0 Normal
04/18/2026 05 AM PDT 1.87 24 0 Normal
04/18/2026 06 AM PDT 1.86 23 - Normal
04/18/2026 07 AM PDT 1.86 23 0 Normal
04/18/2026 08 AM PDT 1.86 23 0 Normal
04/18/2026 09 AM PDT 1.86 23 0 Normal
04/18/2026 10 AM PDT 1.86 23 0 Normal
04/18/2026 11 AM PDT 1.86 23 0 Normal
04/18/2026 12 PM PDT 1.86 23 0 Normal
04/18/2026 01 PM PDT 1.86 23 0 Normal
04/18/2026 02 PM PDT 1.86 23 0 Normal
04/18/2026 03 PM PDT 1.86 23 0 Normal
04/18/2026 04 PM PDT 1.86 23 0 Normal
04/18/2026 05 PM PDT 1.86 23 0 Normal
04/18/2026 06 PM PDT 1.86 23 0 Normal
04/18/2026 07 PM PDT 1.85 22 - Normal
04/18/2026 08 PM PDT 1.85 22 0 Normal
04/18/2026 09 PM PDT 1.85 22 0 Normal
04/18/2026 10 PM PDT 1.85 22 0 Normal
04/18/2026 11 PM PDT 1.85 22 0 Normal
04/19/2026 12 AM PDT 1.85 22 0 Normal
04/19/2026 01 AM PDT 1.85 22 0 Normal
04/19/2026 02 AM PDT 1.85 22 0 Normal
04/19/2026 03 AM PDT 1.85 22 0 Normal
04/19/2026 04 AM PDT 1.85 22 0 Normal
04/19/2026 05 AM PDT 1.85 22 0 Normal
04/19/2026 06 AM PDT 1.85 22 0 Normal
04/19/2026 07 AM PDT 1.85 22 0 Normal
04/19/2026 08 AM PDT 1.85 22 0 Normal
04/19/2026 09 AM PDT 1.84 21 - Normal
04/19/2026 10 AM PDT 1.84 21 0 Normal
04/19/2026 11 AM PDT 1.84 21 0 Normal
04/19/2026 12 PM PDT 1.84 21 0 Normal
04/19/2026 01 PM PDT 1.84 21 0 Normal
04/19/2026 02 PM PDT 1.84 21 0 Normal
04/19/2026 03 PM PDT 1.84 21 0 Normal
04/19/2026 04 PM PDT 1.84 21 0 Normal
04/19/2026 05 PM PDT 1.84 21 0 Normal
04/19/2026 06 PM PDT 1.84 21 0 Normal
04/19/2026 07 PM PDT 1.84 21 0 Normal
04/19/2026 08 PM PDT 1.84 21 0 Normal
04/19/2026 09 PM PDT 1.84 21 0 Normal
04/19/2026 10 PM PDT 1.84 21 0 Normal
04/19/2026 11 PM PDT 1.84 21 0 Normal
04/20/2026 12 AM PDT 1.84 21 0 Normal
04/20/2026 01 AM PDT 1.83 20 - Normal
04/20/2026 02 AM PDT 1.83 20 0 Normal
04/20/2026 03 AM PDT 1.83 20 0 Normal
04/20/2026 04 AM PDT 1.83 20 0 Normal
04/20/2026 05 AM PDT 1.84 21 + Normal
04/20/2026 06 AM PDT 1.84 21 0 Normal
04/20/2026 07 AM PDT 1.85 22 + Normal
04/20/2026 08 AM PDT 1.85 22 0 Normal
04/20/2026 09 AM PDT 1.86 23 + Normal
04/20/2026 10 AM PDT 1.87 24 + Normal
04/20/2026 11 AM PDT 1.87 24 0 Normal
04/20/2026 12 PM PDT 1.88 25 + Normal
04/20/2026 01 PM PDT 1.88 25 0 Normal
04/20/2026 02 PM PDT 1.89 26 + Normal
04/20/2026 03 PM PDT 1.89 26 0 Normal
04/20/2026 04 PM PDT 1.90 27 + Normal
04/20/2026 05 PM PDT 1.90 27 0 Normal
04/20/2026 06 PM PDT 1.90 27 0 Normal
04/20/2026 07 PM PDT 1.90 27 0 Normal
04/20/2026 08 PM PDT 1.90 27 0 Normal
04/20/2026 09 PM PDT 1.90 27 0 Normal
04/20/2026 10 PM PDT 1.91 28 + Normal
04/20/2026 11 PM PDT 1.91 28 0 Normal
04/21/2026 12 AM PDT 1.91 28 0 Normal
04/21/2026 01 AM PDT 1.91 28 0 Normal
04/21/2026 02 AM PDT 1.91 28 0 Normal
04/21/2026 03 AM PDT 1.91 28 0 Normal
04/21/2026 04 AM PDT 1.91 28 0 Normal
04/21/2026 05 AM PDT 1.91 28 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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