A spring-like weather system is expected to bring much cooler temperatures, widespread showers, isolated thunderstorms, and gusty winds to Southern Oregon and Northern California through Saturday. Snow levels may lower near 6,000 feet late Friday into Saturday, with chilly mornings expected Sunday and Monday.

A noticeable shift toward cooler, breezier and somewhat wetter weather is expected Friday into Saturday across Southern Oregon and Northern California. Rain chances appear most likely west of the Cascades and along the coast, while the broader regional impact may be the sharp cooldown during a busy outdoor-event weekend.

A Heat Advisory is in effect Monday and Tuesday for much of southwest Oregon and parts of Northern California, with afternoon highs of 95 to 100 expected in the Rogue Valley and nearby low-lying valleys.

The National Weather Service has issued a Fire Weather Watch for Klamath, Lake, Siskiyou and Modoc counties, warning that thunderstorms could bring abundant lightning, dry fuels and gusty outflow winds late Thursday night through Friday night.