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NWS / NWPSSite ID: nlgi2active

NWS / NWPS nlgi2

Illinois River at LaGrange Lock and Dam

Illinois River • Brown • IL

Latest public reading22.96 ftObserved Jun 19, 2026 at 2:00 PM CDT
TrendRisingForecast available
Data freshness StaleObservation 2740 minutes old
Flood contextActionFetched 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 21 forecast points.

Line chart: Observed, Forecast05101520252026-05-152026-06-252026-06-26
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 • stage24.1 ftValid Jun 21, 2026 at 1:00 PM CDT
HTIFF • stage24.3 ftValid Jun 21, 2026 at 7:00 PM CDT
HTIFF • stage24.4 ftValid Jun 22, 2026 at 1:00 AM CDT
HTIFF • stage24.5 ftValid Jun 22, 2026 at 7:00 AM CDT
HTIFF • stage24.5 ftValid Jun 22, 2026 at 1:00 PM CDT
HTIFF • stage24.6 ftValid Jun 22, 2026 at 7:00 PM CDT

Observations

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.