Overview

• Valley locations could hit 100 degrees Saturday, potentially marking the first June triple-digit day in nearly 20 years
• Bay Area coasts will stay cool in the 60s to mid-70s, capping one of the coolest Junes on record for many coastal communities
• Temperatures will ease Sunday as the incoming upper-level low strengthens the marine layer and brings onshore flow
• Afternoon convective storms are forecast across the Sierra starting Sunday and lingering each afternoon next week
• The Climate Prediction Center outlook signals a return to above-average heat heading into the July Fourth holiday week