A forecast for a series of thunderstorms and possibly heavy rain showers had two-thirds of Utah under a Flash Flood Watch through Wednesday night. The advisory, which kicked in at 10 a.m., included southern, central and northeastern Utah. The National Weather Service warned of the potential for flooding in slot canyons, on mountain slopes recently denuded by wildfires and along normally dry washes and creek beds in steep terrain. The risk for mudslides and rock falls along stretches of vulnerabl...