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NWS / NWPSSite ID: NLGI2active

NWS / NWPS NLGI2

Illinois River at LaGrange Lock and Dam

Illinois River • Brown • IL

Latest public reading17.84 ftObserved Aug 30, 2026 at 2:00 PM CDT
TrendRisingForecast available
Data freshnessStaleBeyond three times the publishing interval. Value shown with its age, never hidden.Observation 5434 minutes old
Flood contextNo source flood categoryFetched Timestamp unavailable

Stage and discharge

Observed source readings

Stage and discharge

Daily rollups and linked forecast values

Observed Forecast

Stage and discharge chart includes 10 observed points and 12 forecast points.

Line chart: Observed, Forecast05101520252026-05-152026-08-012026-09-042026-09-052026-09-06
Data series

Flood-stage context

Source-published thresholds where available

Action21 ftSource-backed threshold
Minor flood23 ftSource-backed threshold
Moderate flood27 ftSource-backed threshold
Major flood29 ftSource-backed threshold

Forecast

Linked NWS/NWPS values

HTIFF • stage12.3 ftValid Sep 3, 2026 at 1:00 PM CDT
HTIFF • stage11.8 ftValid Sep 3, 2026 at 7:00 PM CDT
HTIFF • stage11.6 ftValid Sep 4, 2026 at 1:00 AM CDT
HTIFF • stage11.4 ftValid Sep 4, 2026 at 7:00 AM CDT
HTIFF • stage11.3 ftValid Sep 4, 2026 at 1:00 PM CDT
HTIFF • stage11.1 ftValid Sep 4, 2026 at 7:00 PM CDT

Observations

stage

17.84 ft

Observed Aug 29, 2026 at 7:00 PM CDT

stage

20.46 ft

Observed Aug 19, 2026 at 7:00 PM CDT

stage

11.11 ft

Observed Aug 8, 2026 at 7:00 PM CDT

stage

10.19 ft

Observed Jul 31, 2026 at 7:00 PM CDT

stage

22.03 ft

Observed Jul 9, 2026 at 7:00 PM CDT

stage

24.57 ft

Observed Jul 2, 2026 at 7:00 PM CDT

stage

22.96 ft

Observed Jun 18, 2026 at 7:00 PM CDT

stage

10.83 ft

Observed May 29, 2026 at 7:00 PM CDT

stage

12.52 ft

Observed May 22, 2026 at 7:00 PM CDT

stage

17.43 ft

Observed May 14, 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.