Current Great Salt Lake south arm elevation stands near 4,189.6–4,189.8 ft in late September 2026, following a 0.4 ft drop over the prior 30 days amid elevated evaporation and limited tributary inflows after a dry 2025–2026 water year. The annual minimum typically occurs in October–November before winter precipitation and spring runoff reverse the decline. Trader consensus remains tightly balanced across the 4,189.3–4,189.7 ft bins because modest differences in remaining fall evaporation—driven by temperature, humidity, wind, and lake surface area—plus any late-season inflows or conservation releases can shift the exact low by several tenths of a foot. Official USGS and Utah Division of Water Resources monitoring will clarify resolution thresholds in coming weeks.