A tornado made landfall Tuesday afternoon in California just outside Los Angeles, according to the National Weather Service, along with four water spouts and winds of up to 80 mph.

Experts are still analyzing what took place, but the Los Angeles Times confirmed that a storm “with tornado-like strength pounded the Southern California coast” this afternoon. Witnesses reported seeing a tornado touch down in Sunset Beach, lift boats out of the water and come on shore.

But forecasters said the worst is yet to come, in the form of a stronger, colder storm set to hit the L.A. area Wednesday evening. Authorities plan to evacuate 489 homes in the mudslide-prone foothill areas including La Cañada Flintridge on Wednesday morning in advance of the storm. Those evacuations are expected to remain in place until Monday.