A late-season snowstorm may look like relief, but it can’t salvage a historically bad snowpack year. While it’s too early to measure Tuesday’s and Wednesday’s storm’s impact, water experts said a single snowstorm won’t reverse months of below-average snowpack. “This year is proving difficult to quantify,” Brad Udall, senior water and climate research scholar at Colorado State University’s Colorado Water Center, said in an email. “As of April 1, worst ever. Right now, no.  But this is still an awful year.” A spring storm dumps snow in Parker on Wednesday. (Dennis Huspeni/The Denver Gazette) Cities across the metro Denver region received between 5 and 12 inches with the snowstorm that moved in Tuesday evening, according to the National Weather Service. The mountains received significantly more. Estes Park, for example, got slammed with 28 inches. Mountain snowpack acts as a natural reservoir that supplies water to Colorado and other Western states as it melts.…