Arm of Grand Lake, LA

As of 2026-10-12, Arm of Grand Lake sits at 3.10 ft, which is low for this time of year. Over the past 30 days the level has fallen 0.49 ft.

The most recent reading at Arm of Grand Lake is 3.10 ft (2026-10-12), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Arm of Grand Lake in our records is 29.26 ft on 2026-08-23. The lowest is 2.62 ft on 2024-10-29. Our record covers about 23 years of readings.

Compared with every October in our records, the current level is higher than 6% of them, which we classify as low for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Arm of Grand Lake has fallen 0.49 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

Arm of Grand Lake is -0.19 ft compared with this date last year (3.10 ft today). The full-history chart above covers 23 years, with a record high of 29.26 ft and a record low of 2.62 ft.