CASPER, Wyo. (AP) - Wyoming's snowpack pack is now down to 45 percent of average, compared with 152 percent of average at this time last year. The Natural Resources Conservation Service in Casper says all of the state's basins are below average this week. The snow in the Cheyenne basin has melted away completely. The Madison basin has highest snowpack at 90 percent of average while Yellowstone is at 87 percent. NRCS water supply specialist Lee Hackleman says that if things don't improve in May, this year's snow levels could reach an all-time low.