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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: | Mar 25 2026 at 12:55 PM PDT | Next Issuance: | Mar 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: 03/25/2026 at 12:55 PM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 03/20/2026 at 06:00 PM PDT
# Maximum Observed Stage: 1.96 Feet
# Maximum Observed Flow: 34 cfs
#
# Earliest Date & Time of Maximum Forecast: 03/25/2026 at 01:00 PM PDT
# Maximum Forecast Stage: 1.89 Feet
# Maximum Forecast Flow: 26 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
03/20/2026 12 PM PDT 1.93 31 Normal
03/20/2026 01 PM PDT 1.93 31 0 Normal
03/20/2026 02 PM PDT 1.93 31 0 Normal
03/20/2026 03 PM PDT 1.94 32 + Normal
03/20/2026 04 PM PDT 1.96 34 + Normal
03/20/2026 05 PM PDT 1.96 34 0 Normal
03/20/2026 06 PM PDT 1.96 34 0 Normal
03/20/2026 07 PM PDT 1.95 33 - Normal
03/20/2026 08 PM PDT 1.95 33 0 Normal
03/20/2026 09 PM PDT 1.95 33 0 Normal
03/20/2026 10 PM PDT 1.95 33 0 Normal
03/20/2026 11 PM PDT 1.95 33 0 Normal
03/21/2026 12 AM PDT 1.95 33 0 Normal
03/21/2026 01 AM PDT 1.95 33 0 Normal
03/21/2026 02 AM PDT 1.95 33 0 Normal
03/21/2026 03 AM PDT 1.95 33 0 Normal
03/21/2026 04 AM PDT 1.95 33 0 Normal
03/21/2026 05 AM PDT 1.95 33 0 Normal
03/21/2026 06 AM PDT 1.95 33 0 Normal
03/21/2026 07 AM PDT 1.95 33 0 Normal
03/21/2026 08 AM PDT 1.95 33 0 Normal
03/21/2026 09 AM PDT 1.95 33 0 Normal
03/21/2026 10 AM PDT 1.95 33 0 Normal
03/21/2026 11 AM PDT 1.95 33 0 Normal
03/21/2026 12 PM PDT 1.94 32 - Normal
03/21/2026 01 PM PDT 1.94 32 0 Normal
03/21/2026 02 PM PDT 1.94 32 0 Normal
03/21/2026 03 PM PDT 1.94 32 0 Normal
03/21/2026 04 PM PDT 1.94 32 0 Normal
03/21/2026 05 PM PDT 1.94 32 0 Normal
03/21/2026 06 PM PDT 1.93 31 - Normal
03/21/2026 07 PM PDT 1.93 31 0 Normal
03/21/2026 08 PM PDT 1.93 31 0 Normal
03/21/2026 09 PM PDT 1.93 31 0 Normal
03/21/2026 10 PM PDT 1.93 31 0 Normal
03/21/2026 11 PM PDT 1.93 31 0 Normal
03/22/2026 12 AM PDT 1.93 31 0 Normal
03/22/2026 01 AM PDT 1.93 31 0 Normal
03/22/2026 02 AM PDT 1.93 31 0 Normal
03/22/2026 03 AM PDT 1.93 31 0 Normal
03/22/2026 04 AM PDT 1.93 31 0 Normal
03/22/2026 05 AM PDT 1.93 31 0 Normal
03/22/2026 06 AM PDT 1.93 31 0 Normal
03/22/2026 07 AM PDT 1.93 31 0 Normal
03/22/2026 08 AM PDT 1.93 31 0 Normal
03/22/2026 09 AM PDT 1.93 31 0 Normal
03/22/2026 10 AM PDT 1.93 31 0 Normal
03/22/2026 11 AM PDT 1.92 29 - Normal
03/22/2026 12 PM PDT 1.93 31 + Normal
03/22/2026 01 PM PDT 1.92 29 - Normal
03/22/2026 02 PM PDT 1.92 29 0 Normal
03/22/2026 03 PM PDT 1.92 29 0 Normal
03/22/2026 04 PM PDT 1.92 29 0 Normal
03/22/2026 05 PM PDT 1.92 29 0 Normal
03/22/2026 06 PM PDT 1.92 29 0 Normal
03/22/2026 07 PM PDT 1.92 29 0 Normal
03/22/2026 08 PM PDT 1.92 29 0 Normal
03/22/2026 09 PM PDT 1.92 29 0 Normal
03/22/2026 10 PM PDT 1.92 29 0 Normal
03/22/2026 11 PM PDT 1.92 29 0 Normal
03/23/2026 12 AM PDT 1.92 29 0 Normal
03/23/2026 01 AM PDT 1.92 29 0 Normal
03/23/2026 02 AM PDT 1.92 29 0 Normal
03/23/2026 03 AM PDT 1.92 29 0 Normal
03/23/2026 04 AM PDT 1.92 29 0 Normal
03/23/2026 05 AM PDT 1.92 29 0 Normal
03/23/2026 06 AM PDT 1.92 29 0 Normal
03/23/2026 07 AM PDT 1.92 29 0 Normal
03/23/2026 08 AM PDT 1.92 29 0 Normal
03/23/2026 09 AM PDT 1.92 29 0 Normal
03/23/2026 10 AM PDT 1.92 29 0 Normal
03/23/2026 11 AM PDT 1.92 29 0 Normal
03/23/2026 12 PM PDT 1.92 29 0 Normal
03/23/2026 01 PM PDT 1.92 29 0 Normal
03/23/2026 02 PM PDT 1.92 29 0 Normal
03/23/2026 03 PM PDT 1.92 29 0 Normal
03/23/2026 04 PM PDT 1.92 29 0 Normal
03/23/2026 05 PM PDT 1.92 29 0 Normal
03/23/2026 06 PM PDT 1.92 29 0 Normal
03/23/2026 07 PM PDT 1.91 28 - Normal
03/23/2026 08 PM PDT 1.91 28 0 Normal
03/23/2026 09 PM PDT 1.91 28 0 Normal
03/23/2026 10 PM PDT 1.91 28 0 Normal
03/23/2026 11 PM PDT 1.91 28 0 Normal
03/24/2026 12 AM PDT 1.91 28 0 Normal
03/24/2026 01 AM PDT 1.91 28 0 Normal
03/24/2026 02 AM PDT 1.91 28 0 Normal
03/24/2026 03 AM PDT 1.90 27 - Normal
03/24/2026 04 AM PDT 1.91 28 + Normal
03/24/2026 05 AM PDT 1.91 28 0 Normal
03/24/2026 06 AM PDT 1.91 28 0 Normal
03/24/2026 07 AM PDT 1.91 28 0 Normal
03/24/2026 08 AM PDT 1.90 27 - Normal
03/24/2026 09 AM PDT 1.90 27 0 Normal
03/24/2026 10 AM PDT 1.91 28 + Normal
03/24/2026 11 AM PDT 1.91 28 0 Normal
03/24/2026 12 PM PDT 1.91 28 0 Normal
03/24/2026 01 PM PDT 1.90 27 - Normal
03/24/2026 02 PM PDT 1.91 28 + Normal
03/24/2026 03 PM PDT 1.90 27 - Normal
03/24/2026 04 PM PDT 1.90 27 0 Normal
03/24/2026 05 PM PDT 1.90 27 0 Normal
03/24/2026 06 PM PDT 1.90 27 0 Normal
03/24/2026 07 PM PDT 1.90 27 0 Normal
03/24/2026 08 PM PDT 1.90 27 0 Normal
03/24/2026 09 PM PDT 1.90 27 0 Normal
03/24/2026 10 PM PDT 1.90 27 0 Normal
03/24/2026 11 PM PDT 1.90 27 0 Normal
03/25/2026 12 AM PDT 1.90 27 0 Normal
03/25/2026 01 AM PDT 1.90 27 0 Normal
03/25/2026 02 AM PDT 1.89 26 - Normal
03/25/2026 03 AM PDT 1.89 26 0 Normal
03/25/2026 04 AM PDT 1.89 26 0 Normal
03/25/2026 05 AM PDT 1.89 26 0 Normal
03/25/2026 06 AM PDT 1.89 26 0 Normal
03/25/2026 07 AM PDT 1.89 26 0 Normal
03/25/2026 08 AM PDT 1.89 26 0 Normal
03/25/2026 09 AM PDT 1.90 27 + Normal
03/25/2026 10 AM PDT 1.90 27 0 Normal
03/25/2026 11 AM PDT 1.89 26 - Normal
03/25/2026 12 PM PDT 1.89 26 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
03/25/2026 01 PM PDT 1.89 26 Normal
03/25/2026 02 PM PDT 1.89 26 0 Normal
03/25/2026 03 PM PDT 1.89 26 0 Normal
03/25/2026 04 PM PDT 1.89 26 0 Normal
03/25/2026 05 PM PDT 1.89 26 0 Normal
03/25/2026 06 PM PDT 1.89 26 0 Normal
03/25/2026 07 PM PDT 1.89 26 0 Normal
03/25/2026 08 PM PDT 1.89 26 0 Normal
03/25/2026 09 PM PDT 1.89 26 0 Normal
03/25/2026 10 PM PDT 1.89 26 0 Normal
03/25/2026 11 PM PDT 1.89 26 0 Normal
03/26/2026 12 AM PDT 1.89 26 0 Normal
03/26/2026 01 AM PDT 1.89 26 0 Normal
03/26/2026 02 AM PDT 1.89 26 0 Normal
03/26/2026 03 AM PDT 1.89 26 0 Normal
03/26/2026 04 AM PDT 1.89 26 0 Normal
03/26/2026 05 AM PDT 1.89 26 0 Normal
03/26/2026 06 AM PDT 1.88 25 - Normal
03/26/2026 07 AM PDT 1.88 25 0 Normal
03/26/2026 08 AM PDT 1.88 25 0 Normal
03/26/2026 09 AM PDT 1.88 25 0 Normal
03/26/2026 10 AM PDT 1.88 25 0 Normal
03/26/2026 11 AM PDT 1.88 25 0 Normal
03/26/2026 12 PM PDT 1.88 25 0 Normal
03/26/2026 01 PM PDT 1.88 25 0 Normal
03/26/2026 02 PM PDT 1.88 25 0 Normal
03/26/2026 03 PM PDT 1.88 25 0 Normal
03/26/2026 04 PM PDT 1.88 25 0 Normal
03/26/2026 05 PM PDT 1.88 25 0 Normal
03/26/2026 06 PM PDT 1.88 25 0 Normal
03/26/2026 07 PM PDT 1.88 25 0 Normal
03/26/2026 08 PM PDT 1.88 25 0 Normal
03/26/2026 09 PM PDT 1.88 25 0 Normal
03/26/2026 10 PM PDT 1.88 25 0 Normal
03/26/2026 11 PM PDT 1.88 25 0 Normal
03/27/2026 12 AM PDT 1.88 25 0 Normal
03/27/2026 01 AM PDT 1.88 25 0 Normal
03/27/2026 02 AM PDT 1.88 25 0 Normal
03/27/2026 03 AM PDT 1.88 25 0 Normal
03/27/2026 04 AM PDT 1.88 25 0 Normal
03/27/2026 05 AM PDT 1.88 25 0 Normal
03/27/2026 06 AM PDT 1.88 25 0 Normal
03/27/2026 07 AM PDT 1.88 25 0 Normal
03/27/2026 08 AM PDT 1.88 25 0 Normal
03/27/2026 09 AM PDT 1.88 25 0 Normal
03/27/2026 10 AM PDT 1.88 25 0 Normal
03/27/2026 11 AM PDT 1.88 25 0 Normal
03/27/2026 12 PM PDT 1.88 25 0 Normal
03/27/2026 01 PM PDT 1.88 25 0 Normal
03/27/2026 02 PM PDT 1.88 25 0 Normal
03/27/2026 03 PM PDT 1.87 24 - Normal
03/27/2026 04 PM PDT 1.87 24 0 Normal
03/27/2026 05 PM PDT 1.87 24 0 Normal
03/27/2026 06 PM PDT 1.87 24 0 Normal
03/27/2026 07 PM PDT 1.87 24 0 Normal
03/27/2026 08 PM PDT 1.87 24 0 Normal
03/27/2026 09 PM PDT 1.87 24 0 Normal
03/27/2026 10 PM PDT 1.87 24 0 Normal
03/27/2026 11 PM PDT 1.87 24 0 Normal
03/28/2026 12 AM PDT 1.87 24 0 Normal
03/28/2026 01 AM PDT 1.87 24 0 Normal
03/28/2026 02 AM PDT 1.87 24 0 Normal
03/28/2026 03 AM PDT 1.87 24 0 Normal
03/28/2026 04 AM PDT 1.87 24 0 Normal
03/28/2026 05 AM PDT 1.87 24 0 Normal
03/28/2026 06 AM PDT 1.87 24 0 Normal
03/28/2026 07 AM PDT 1.87 24 0 Normal
03/28/2026 08 AM PDT 1.87 24 0 Normal
03/28/2026 09 AM PDT 1.87 24 0 Normal
03/28/2026 10 AM PDT 1.87 24 0 Normal
03/28/2026 11 AM PDT 1.87 24 0 Normal
03/28/2026 12 PM PDT 1.87 24 0 Normal
03/28/2026 01 PM PDT 1.87 24 0 Normal
03/28/2026 02 PM PDT 1.87 24 0 Normal
03/28/2026 03 PM PDT 1.87 24 0 Normal
03/28/2026 04 PM PDT 1.87 24 0 Normal
03/28/2026 05 PM PDT 1.87 24 0 Normal
03/28/2026 06 PM PDT 1.87 24 0 Normal
03/28/2026 07 PM PDT 1.87 24 0 Normal
03/28/2026 08 PM PDT 1.87 24 0 Normal
03/28/2026 09 PM PDT 1.87 24 0 Normal
03/28/2026 10 PM PDT 1.86 23 - Normal
03/28/2026 11 PM PDT 1.86 23 0 Normal
03/29/2026 12 AM PDT 1.86 23 0 Normal
03/29/2026 01 AM PDT 1.86 23 0 Normal
03/29/2026 02 AM PDT 1.86 23 0 Normal
03/29/2026 03 AM PDT 1.86 23 0 Normal
03/29/2026 04 AM PDT 1.86 23 0 Normal
03/29/2026 05 AM PDT 1.86 23 0 Normal
03/29/2026 06 AM PDT 1.86 23 0 Normal
03/29/2026 07 AM PDT 1.86 23 0 Normal
03/29/2026 08 AM PDT 1.86 23 0 Normal
03/29/2026 09 AM PDT 1.86 23 0 Normal
03/29/2026 10 AM PDT 1.86 23 0 Normal
03/29/2026 11 AM PDT 1.86 23 0 Normal
03/29/2026 12 PM PDT 1.86 23 0 Normal
03/29/2026 01 PM PDT 1.86 23 0 Normal
03/29/2026 02 PM PDT 1.86 23 0 Normal
03/29/2026 03 PM PDT 1.86 23 0 Normal
03/29/2026 04 PM PDT 1.86 23 0 Normal
03/29/2026 05 PM PDT 1.86 23 0 Normal
03/29/2026 06 PM PDT 1.86 23 0 Normal
03/29/2026 07 PM PDT 1.86 23 0 Normal
03/29/2026 08 PM PDT 1.86 23 0 Normal
03/29/2026 09 PM PDT 1.86 23 0 Normal
03/29/2026 10 PM PDT 1.86 23 0 Normal
03/29/2026 11 PM PDT 1.86 23 0 Normal
03/30/2026 12 AM PDT 1.86 23 0 Normal
03/30/2026 01 AM PDT 1.86 23 0 Normal
03/30/2026 02 AM PDT 1.86 23 0 Normal
03/30/2026 03 AM PDT 1.86 23 0 Normal
03/30/2026 04 AM PDT 1.86 23 0 Normal
03/30/2026 05 AM PDT 1.86 23 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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