Sun shines over San Diego before clouds, excessive heat return

SAN DIEGO (FOX 5/KUSI) — The sun made an amazing appearance over San Diego Wednesday afternoon after days of marine layer gloom, heating up the region as low clouds retreated from the beaches during the morning.

Low clouds will fill in again Wednesday night into Thursday morning for beaches and inland areas, leading to patchy drizzle again.

Inland valleys should be clear for the afternoon, but a bit of the marine layer looks to linger along the coast making for a partly sunny day.

A weak low-pressure system will move inland across Southern California later Thursday, resulting in a dip in temperatures for most areas. Mountain and desert communities should expect periods of gusty westerly winds up to 45 miles per hour.

However, the cooling trend will be brief as another high pressure system creeps over the area Friday into Saturday. This will bump our daytime highs slightly above average west of the mountains and bring high heat risk to the desert region.

An Excessive Heat Watch will go into effect for San Diego and Riverside County deserts on Friday morning due to widespread temperatures above 100 degrees. The Heat Watch will expire Saturday night.

Thursday temperatures will top out in the upper 60’s to low 70’s at the coast, upper 70’s to low 80’s inland valleys and mountains and around 105 degrees for deserts.