A Winter Storm Warning has been issued for Denver, Boulder and Golden, as the biggest Denver-area snowstorm in three years is forecast to start Wednesday night. The winter weather storm system is forecast to arrive in Colorado on Wednesday, with rain turning to snow sometime between Wednesday night or Thursday morning. The worst of the impact will be on Thursday, with the storm tapering off Friday. That could mean 36 hours of rain and snow in the Denver metro area. The National Weather Service said on Tuesday afternoon to expect 9 to 18 inches of snow along the Interstate 25 corridor in Denver, Golden and Boulder between Wednesday and Friday, with feet of snow falling in the foothills. Latest forecast: https://www.9news.com/article/weather/forecast/denver-front-range-colorado-weather-forecast/73-62561776-a0cd-44b1-a9c7-18072b56759d More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.