Denver began Tuesday with muggy conditions, tying its highest dewpoint in 17 years. Denver's dewpoint (a measure of the amount of moisture in the atmosphere) of 66 degrees at 1 a.m. Tuesday tied the city's highest since 2008, almost equal to Dallas or Austin. The moisture in the air will fuel stronger showers and storms later Tuesday. The slow-moving storms will lead to flash flooding concerns. However, Tuesday's storms will have only about 40 percent coverage in the Denver area with a fairly low severe weather threat, athough it'll be higher across the northeastern plains. More local videos here: https://bit.ly/2Pa0d1l Subscribe to NEXT: http://bit.ly/2eP1GwI Stay connected: 9NEWS Website: http://www.9news.com/ Facebook: https://www.facebook.com/ilike9news X: https://x.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.