The National Weather Service has issued a flood warning for McHenry County that could affect areas along the Fox River.
The county remains under a flood watch through Thursday afternoon, and a flood warning is in effect starting at 1 p.m. Friday, according to the weather service.
The Fox River at the Algonquin Tailwater – the stretch of water immediately downstream of the dam – was at 9.1 feet Thursday morning, according to the Fox Waterway Agency. Its flood stage is 9.5 feet.
The river at the McHenry dam was at 3.8 feet Thursday morning. Flood stage is 4 feet.
The weather service predicts another half-inch of rain to fall through Thursday. On Wednesday, the service said about an inch of rain fell overnight. The ground is also starting to thaw, which is releasing soil moisture, according to the service.
The county is also under a wind advisory until 7 p.m. Thursday. Wind gusts of up to 50 mph are expected, which could cause minor tree damage, according to the weather service.