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NWS / NWPSSite ID: SHEC1active

NWS / NWPS SHEC1

Napa River near St. Helena

Napa River • Napa • CA

Latest public reading1.54 ftObserved Jun 12, 2026 at 4:00 PM CDT
TrendRisingForecast available
Data freshness StaleObservation 12665 minutes old
Flood contextNo source flood categoryFetched Timestamp unavailable

Stage and discharge

Observed source readings

Stage and discharge

Hourly readings and linked forecast values

Observed Forecast

Stage and discharge chart includes 1 observed point and 60 forecast points.

Line chart: Observed, Forecast00.511.5206-21 15:1506-23 16:0006-24 04:00
Data series

Flood-stage context

Source-published thresholds where available

Action16 ftSource-backed threshold
Minor flood18 ftSource-backed threshold
Moderate flood20 ftSource-backed threshold
Major flood22 ftSource-backed threshold

Forecast

Linked NWS/NWPS values

HGIFE • stage1.51 ftValid Jun 21, 2026 at 12:00 PM CDT
HGIFE • stage1.51 ftValid Jun 21, 2026 at 1:00 PM CDT
HGIFE • stage1.51 ftValid Jun 21, 2026 at 2:00 PM CDT
HGIFE • stage1.51 ftValid Jun 21, 2026 at 3:00 PM CDT
HGIFE • stage1.51 ftValid Jun 21, 2026 at 4:00 PM CDT
HGIFE • stage1.51 ftValid Jun 21, 2026 at 5:00 PM CDT

Observations

Stage

1.51 ft

Observed Jun 21, 2026 at 10:15 AM CDT

Alerts

Alerts unavailable

Alerts are shown only when the API returns a source-backed match.

Official public sources

Readings and thresholds stay tied to USGS, NOAA/NWS, or source-backed records.

Source freshness

Observed and fetched timestamps are shown separately when the API returns them.

Transparent methodology

Unavailable forecasts, alerts, and thresholds are shown as unavailable states.