Tracking excessive heat and possible mountain storms

An  Excessive Heat Warning will go into effect at 10 a.m. this morning until 8 p.m. Sunday. A ridge of high pressure could push temperatures 5° above normal this weekend, with a possible high of 113°.

While we are not tracking record-breaking heat, an influx of humidity from Tropical Cyclone Jova could increase heat risks.

Extra humidity makes it more difficult for your body to cool itself on warmer-than-normal days.

This additional humidity will allow for thunderstorm development over San Bernardino County and Riverside County mountains by this afternoon. Intermittent sprinkles will remain possible on the valley floor through Sunday as moisture remains.

A High Surf Advisory remains in place until 5 p.m. Monday for Orange County and Los Angeles County beaches that could see a surf of 5 to 7 feet due to the tropical system.

Increased cloud cover and the possibility for mountain thunderstorms remains on Sunday. Low pressure will allow temperatures to sink closer to seasonal norms by the start of the work week.