Forecasters who issued dire warnings ahead of last weekend’s tornado outbreak in the Midwest deemed the effort a success Monday, largely because dozens of tornadoes hit yet caused only a handful of deaths. But they expressed concern about future public complacency. The National Weather Service’s Storm Prediction Center issued a rare high-risk warning days ahead of the storms, sternly urging residents across several states to prepare for "life-threatening" weather. State officials and residents in communities where tornadoes hit praised the effort, noting only six lives were lost.