If you're gambling on the weather, snow looks like the underdog.Much of the western U.S., including the Lake Tahoe Region, is most likely to have below normal precipitation for the next three months, according to updated outlook maps released by the National Oceanic and Atmospheric Administration Thursday.Lake Tahoe is included in a darkly shaded region centered around the San Francisco Bay Area forecasters have determined has a 50 percent chance of having below normal precipitation from March through May. The same region has a 33.33 percent chance of experiencing average precipitation and a 16.67 percent chance of having above average …