Thunderstorm watches covering most of the Front Range have expired late tonight, but flooding is still possible because of the heavy rain a turbulent night has delivered.

An urban and small stream flood advisory remains in effect until 12:30 a.m. for northeast Douglas County, and southwest Arapahoe County, including southern Aurora, eastern Centennial, Parker and the Pinery.

A flash flood warning is in effect until 1:20 a.m. Thursday for central El Paso County, and a flood advisory remains in effect until 5:30 p.m. Thursday along the Big Thompson River are of northern Colorado.

Showers could linger in Denver until 1 a.m., according to the National Weather Service.

The city has a 30 percent chance of showers and thunderstorms Thursday and Friday, as well, forecasters said.

Until 11 tonight, a severe thunderstorm watch had been in effect for 12 Front Range counties, including Denver.

Hail and heavy rain have been reported across the region.

At about 8:50 p.m. in Boulder, sirens sounded the all-clear signal.

A half an hour earlier officials warned of a 4-foot surge of water moving downstream after 2 inches rain fell in less than an hour in the Fourmile Fire burn area.

Residents in low-lying areas near the creek were ordered to move to higher ground.

The flooding posed a “life-threatening situation” in the Fourmile Fire burn area and the danger would extend all the way to the mouth of Boulder Canyon, forecasters warned at about 8:15 p.m.

There have been no reports of injuries or widespread property damage, according to police, fire and emergency management offices’ Twitter updates.

The Boulder County Office of Emergency Management also issued a warning to get to higher ground, especially aimed at married student housing west of 17th and Arapahoe.

Authorities have been concerned about flooding and landslides in the area were more than 6,200 acres burned in a wildfire last September.

The heavy rains damaged a house in the 1500 block of Gold Run Road and trapped several people in a car at the Anne U. White Trailhead, Cmdr. Rick Brough of the Boulder County Sheriff’s Office, told the Boulder Daily Camera.

Though rain totals are not yet available, the downpour was heavy after the storm moved in from the southwest at about 6 p.m.

Numerous intersections and streets in the metro area were swamped — as they have before, after eight straight days of storms — but there have been no reports of injuries or serious damage as of 6:40 p.m., according to Denver police.

Hail up to 1.25 inches in diameter was reported in Lakewood and other parts of the city, according to the National Weather Service.

Northern Jefferson County and east-central Clear Creek counties took a beating earlier.

At 5:08 p.m. radar located a thunderstorm about 2 miles southeast of Bergen Park moving northeast at 10 mph.

A flood advisory will remain in effect for the Colorado river near Kremmling until Thursday evening.

At 4:15 p.m. today, the river was 14.44 feet because of snowmelt and recent rain, the Weather Service stated.

Flood stage is 15 feet.

A rare high country funnel cloud was reported at 3:35 p.m. near Vernal in northwest Colorado, but it did not reach the ground.