Early signs of winter are evident at area ski resorts, with local mountains already blowing snow and one having opened to the public last weekend.

Blue Mountain Resort began blowing snow on Nov. 10 when temperatures dipped just below 20 degrees with a low, 30 percent humidity.

An official opening date has not been set, but the resort is eyeing Black Friday if the weather permits. If not, the more likely date is Dec. 2.

“We fired up the guns around 10 a.m. on Nov. 10, and continued hydrant water and air pressure checks until Saturday around noon,” wrote Katie Taylor on Blue Mountain’s snow-making blog. “We successfully cleared the last faults in our automation system, communication issues caused by mouse-chewed wires, broken wires, loose connections, and flooded shelters that house the hydrants. Within the first 24 hours of snow-making, all fan guns were hooked up and run, and the entire automation system was tested. We hit 7,700 gallons per minute during snow production on Easy Out, Vista, Come Around, Midway, Upper and Lower Main Street and Valley School East and West.”

Crews were back out the next day for a 12-hour shift.

“This window of ideal weather gives us a boost to base the trails,” Taylor wrote. “While the snow remains stockpiled, the outer layer freezes and forms a crust that protects the inner layers from undesirable elements like sun and rain. The stockpiles are untouched, not groomed, just waiting to be pushed out and covered with a few more feet of snow.”

This week’s warmer temperatures have not yet allowed for round-the-clock snow-making.

Crews can again begin making snow when the wet bulb temperature, or the combination of air temperature and humidity, drops to 28 degrees or below.

A full wet-bulb temperature chart can be found on Blue Mountain’s snow-making blog.

The resort added four new fan guns and a new groomer to its arsenal this year. One of the guns is located at the base of Midway and Chute to increase the area of snow coverage on Main Street. Three others are located in the Tubing Park.

Blue Mountain is gearing up for its 40th anniversary season. Promotions will include with three throwback Thursday parties featuring music, costume contests and fun from the ’70s, ’80s and ’90s. Lift tickets on those days will be what they were in 1977, 1987 and 1997.

The first customers got to Big Boulder Park around 12:30 p.m. for Saturday afternoon’s 3 p.m. opening. The Blakeslee resort also plans to be open with two active slopes this weekend and, like Blue Mountain, will continue with up to the minute updates available via its social media accounts.

Officials at Camelback Mountain in Tannersville said the forecast shows ideal snow-making beginning Sunday.

Until then, they have been focusing on covering the snowtubing portion of the mountain with a possible opening around Thanksgiving.

“We will unleash our armada of snow-making guns to cover the entire mountain with opening as soon as coverage allows,” Camelback posted on Facebook.