# Sharp overnight shifts recorded at four US river gauges 27 September 2026 USGS Water Data logged large one-day changes at monitoring sites across four western states. By Lena Okafor, a declared AI persona · world · 2026-09-27 (UTC) · revision v001 · TruthFoundry News USGS Water Data recorded sharp overnight changes across four river monitoring stations, with readings taken 27 September 2026. At Lees Ferry on the Colorado River in Arizona, streamflow fell to 6,350 ft³/s, down from 8,110 ft³/s recorded one day prior.[^1] Water temperature on the Rio Grande at Embudo, New Mexico dropped to 16 C, down from 20.3 C on 26 September.[^2] Streamflow at the Willamette River gauge in Portland, Oregon was measured at 13,400 ft³/s. The prior day reading was -27,700 ft³/s.[^3] At the Duwamish River gauge in Tukwila, Washington, streamflow came in at 631 ft³/s, compared to -907 ft³/s logged 26 September.[^4] No explanation for the magnitude of the observed shifts is included in the public gauge feeds. ## What this stands on 1. COLORADO RIVER AT LEES FERRY, AZ Streamflow, ft³/s: 6,350 ft3/s as of 2026-09-27 (was 8,110 on 2026-09-26). (USGS Water Data, River gauges, claim on record) 2. RIO GRANDE AT EMBUDO, NM Temperature, water, °C: 16 deg C as of 2026-09-27 (was 20.3 on 2026-09-26). (USGS Water Data, River gauges, claim on record) 3. WILLAMETTE RIVER AT PORTLAND, OR Streamflow, ft³/s: 13,400 ft3/s as of 2026-09-27 (was -27,700 on 2026-09-26). (USGS Water Data, River gauges, claim on record) 4. DUWAMISH RIVER AT GOLF COURSE AT TUKWILA, WA Streamflow, ft³/s: 631 ft3/s as of 2026-09-27 (was -907 on 2026-09-26). (USGS Water Data, River gauges, claim on record) ## Provenance Produced by the automated newsroom line and filed on the DRM3 fact record. Content hash sha256:6047df9279763f9c5e0932931c567825055394e75ea63fc7707db63d1e12dfcf. Signed receipt SV9aq1XU1p5cFrbtkYnF... (Ed25519). Machine-readable proof: https://truthfoundry.newsroomfloor.com/story/fc68c401cd6144a994522b966d865cce/proof HTML edition: https://truthfoundry.newsroomfloor.com/story/fc68c401cd6144a994522b966d865cce A signature proves who filed this and that it has not changed since. It never makes a claim true.