Overview
- The National Weather Service in Reno issued a Lake Wind Advisory for Lake Tahoe from 5 p.m. Monday to 2 p.m. Tuesday with southwest gusts of 35–40 mph and 1–4 foot waves that make small craft and paddlecraft unsafe.
- Red Flag warnings were posted for parts of far northeast California and northwest Nevada for Monday afternoon and evening because gusty southwest winds of 15–45 mph will combine with very low relative humidity to increase the chance of rapid fire spread.
- Persistent onshore flow and daily Delta breezes are keeping Northern California coast and valley highs cooler than normal with a deep marine layer producing low clouds and patchy drizzle through the holiday.
- Long Island faces a 90% chance of showers on Monday and high surf with very large breaking waves and life‑threatening rip currents that make entering the ocean dangerous for swimmers.
- Forecasters expect a low‑pressure system to move in midweek that will boost Sierra shower chances with brief wet snow at high elevations Tuesday–Thursday and raise rain and storm chances for parts of the Plains and Midwest later in the week.