TORNADO OUTBREAK: Three confirmed EF-2 tornadoes were among at least 11 reported twisters that hit South Dakota and Wyoming, with significant damage in Sioux Falls and questions about why some city sirens did not go off. Alex Perez reports and @Rob Marciano has the forecast. https://abcn.ws/2UPEfoH | ABC World News Tonight with David Muir

Sioux Falls and portions of southeastern South Dakota are officially under a Winter Storm Warning for Wednesday afternoon through Thursday morning. | Dakota News Now

AFTERMATH: Aerial footage shows damaged buildings and downed trees after three tornadoes hit the city of Sioux Falls, South Dakota. https://abcn.ws/2FDGjJ0 | ABC News

Aftermath of severe flooding in Sioux Falls, South Dakota shows large slabs of ice and debris left over as cleanup efforts continue. https://abcn.ws/2Fa4TkP | ABC News

133K views · 481 reactions | Watch full episodes of current and classic ABC hit shows in the new ABC app! Download now. | ABC | Facebook