Particle.news
Download on the App Store
9 ARTICLES
·
2w ago

Offshore Low and Delta Breezes Keep Northern California Unseasonably Cool

Persistent onshore flow under a stalled cutoff low is driving valley highs more than 10 degrees below normal with gusty breezes that have prompted a Lake Wind Advisory at Tahoe.

A wavy jet stream loops across the Northern Hemisphere. These locked-in configurations can trap heat domes over one continent while steering cooler air into others.
Image
Image
Image

Overview

  • Valley highs remain at least 10°F below normal under sustained onshore flow from the stalled offshore low.
  • Delta breezes are gusting between 10 and 35 mph across the Central Valley and Sierra foothills, reinforcing the cool conditions.
  • The National Weather Service has issued a Lake Wind Advisory for Lake Tahoe as southwest winds approach 35 mph and produce waves up to three feet.
  • Widespread clouds and a brief Tuesday morning sprinkle have marked the coolest day of the week for many Northern California communities.
  • Isolated thunderstorms are expected in portions of the Sierra from Wednesday through Friday before a gradual warming trend arrives late next week.