KANSAS CITY, Mo. (AP) — Heavy thunderstorms rolled through Kansas and Missouri, yanking down power lines and trees and causing power outages. Downed trees and power lines have left about 50,000 customers of Kansas City Power & Light without power. In Kansas, Westar Energy says numerous outages have also been reported, largely in the Topeka area, but power outages were also reported in Lawrence and Eudora. The weather service says similar storms could spawn large hail and possible tornadoes in both states. The National Weather Service issued a severe thunderstorm watch earlier for several sections around the two states and said storms could continue. The weather service also issued flash flood warnings for southeast Missouri. Ameren Missouri also reported on its website early today (THUR) that about 10,000 of its customers didn't have power, largely in central Missouri.