Brief cooldown with chances of rain, pumping swell from Hurricane Narda

SAN DIEGO (FOX 5/KUSI) — It’s a hot start to the fall season but temperatures will take on a brief cooling trend for the end of the work week.

An upper-level low bringing some heavy rain and thunderstorms to Central California and the Bay Area will push towards the east in the next few days. This will deepen our marine layer and create some overcast conditions for the majority of Friday for the coastline. 

Afternoon temperatures will drop about five degrees below average for inland areas of Thursday and Friday. Daytime highs will range from the low 70s at the coast to mid and upper 70s for the valleys, upper 60s for the mountains and low 90s for the deserts.

Mostly cloudy for some areas tomorrow and we could get some good shower chances from the back side of the pacific storm system moving east. 

Mountains and deserts have the best chance for rain Friday and Saturday with Saturday afternoon between 12 p.m. to 6 p.m. being the more favorable day for wet weather for all areas of the region. Thunderstorms could develop and bring lightning, gusty winds and some hail possibly. 

Hurricane Narda about 640 miles southwest off the coast of Cabo San Lucas is moving west at 15 miles per hour with maximum sustained winds of 90 miles per hour but some modeling predictions reflect it will take a turn to the north by Saturday. There is disagreement about wind speeds and intensity by this point, but it could mean new south swell energy from 3 to 5 feet on the more conservative side to up to 7-foot surf on the bullish side. 

Best surf conditions are looking like Sunday through Tuesday as the new energy moves into Southern California waters. 

There is also a strong Pacific storm system dropping in from Alaska that could have more of a northerly swell influence or potentially combine with the increase south swell. Still a lot of uncertainty with this forecast but definitely something to watch out for! Surfs up (hopefully!)