After Trump administration job cuts, nearly half of National Weather Service forecast offices have 20% vacancy rates — twice that of just a decade ago — as severe weather chugs across the nation's heartland, according to data obtained by The Associated Press. Detailed vacancy data for all 122 weather field offices show eight offices are missing more than 35% of their staff — including those in Arkansas and Kentucky where tornadoes and torrential rain hit this week — according to statistics crowd-sourced by more than a dozen National Weather Service employees. Experts said vacancy rates of 20% or higher amount to critical understaffing, and 55 of the 122 sites reach that level.