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NWS / NWPSSite ID: ISLI1active

NWS / NWPS ISLI1

Henrys Fork near Island Park

HENRYS FORK • Fremont • ID

Latest public reading4.14 ftObserved Jun 21, 2026 at 7:45 AM CDT
TrendRisingForecast available
Data freshness StaleObservation 161 minutes old
Flood contextContext unavailableFetched Timestamp unavailable

Stage and discharge

Observed source readings

Stage and discharge

Daily rollups and linked forecast values

Observed Forecast

Stage and discharge chart includes 4 observed points and 37 forecast points.

Line chart: Observed, Forecast0123452026-05-232026-06-30
Data series

Flood-stage context

Source-published thresholds where available

Flood-stage context unavailable

Flood category levels are not published or not linked for this gauge.

Forecast

Linked NWS/NWPS values

status • stage4.13 ftValid Jun 21, 2026 at 1:00 PM CDT
HGIFZ • stage4.13 ftValid Jun 21, 2026 at 1:00 PM CDT
HGIFZ • stage4.13 ftValid Jun 21, 2026 at 7:00 PM CDT
HGIFZ • stage4.13 ftValid Jun 22, 2026 at 1:00 AM CDT
HGIFZ • stage4.13 ftValid Jun 22, 2026 at 7:00 AM CDT
HGIFZ • stage4.13 ftValid Jun 22, 2026 at 1:00 PM CDT

Observations

stage

4.14 ft

Observed Jun 20, 2026 at 7:00 PM CDT

stage

3.16 ft

Observed Jun 7, 2026 at 7:00 PM CDT

stage

3.22 ft

Observed May 30, 2026 at 7:00 PM CDT

stage

3.36 ft

Observed May 22, 2026 at 7:00 PM 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.