Even a tropical storm can’t get Lake Lanier to anywhere near full pool. The lake’s water level is only up 5 inches since Tropical Storm Irma passed over the Chattahoochee River basin that feeds Lake Lanier on Sept. 11 and Sept. 12. Before the storm hit, National Weather Service forecasts called for as much as 5 inches of rain to fall on Gainesville and Hall County, but that figure decreased as Irma neared North Georgia. With the storm passed, a mere 0.9 inches of rain fell on Gainesville on Sept. 11 and Sept. 12, according to National Oceanic and Atmospheric Administration records.