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.

Red Flag Warnings have been issued for Friday across parts of Southern Oregon and Northern California, including Klamath, Lake, Modoc and Siskiyou counties, as thunderstorms are expected to bring abundant lightning over dry fuels.

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.

The first significant heat wave of the summer is expected to bring 90-degree and triple-digit temperatures to much of Southern Oregon and Northern California this weekend, prompting heat advisories across several west side valleys, coastal areas and parts of far Northern California.

Cooler weather arrives Wednesday across Southern Oregon and Northern California as a compact low and cold front move through the region. NWS Medford says temperatures may fall 10 to 15 degrees compared to Tuesday, with light showers possible along the coast and parts of the inland region.

The National Weather Service has issued a high surf advisory for the South Central Oregon Coast as powerful King Tides roll in this week. Waves up to 25 feet and potential flooding are expected along beaches and low-lying areas, prompting safety warnings for residents and visitors alike.