Overview
- Many regions are seeing a brief return to above-average daytime and nighttime temperatures this week as a persistent upper-level ridge rebuilds over the country.
- Tropical Storm Marie has funneled tropical moisture into parts of the West, raising humidity, producing high surf and rip-current hazards, and boosting spotty mountain shower chances.
- Local National Weather Service offices have issued Heat Advisories and Extreme Heat Warnings for parts of Southern California, the desert Southwest and nearby valleys where daytime highs may reach triple digits.
- A midweek cold front, arriving Wednesday night into Thursday, is forecast to increase rain coverage in some areas and serve as an Impact Day before pushing temperatures and humidity down by Friday and into the weekend.
- Forecasters say this relief is temporary because the summer ridge has dominated much of August; NOAA’s outlook still favors above-average heat into late September, so heat risks, coastal hazards and spotty storms warrant continued local attention.