A weak ridge was forecast to keep the weather fair and mild across San Diego County on Monday, but the night is expected to be chilly, the National Weather Service said.
Onshore flow was predicted to be weak, but persistent, gradually returning a shallow marine layer to coastal areas Sunday night, forecasters said. This could generate some patchy dense fog by Monday morning near the coast.
Highs on Monday are forecast to be 64 to 69 along the coast, 66 to 71 in the inland valleys, 59 to 65 in the mountains and 73 to 78 in the deserts.
On Tuesday, a developing trough was expected to spin up a coastal eddy, deepening the marine layer, and spreading patchy low clouds and cooling well inland through Wednesday.
For the remainder of the week, a strong East Pacific ridge was forecast to funnel disturbances south over the Rockies, said forecasters. This pattern favors fair weather and offshore flow over Southern California, with dry, Santa Ana conditions.
Periods of gusty winds were likely near the coastal foothills at times, along with mild days and chilly nights.
No hazardous marine conditions were expected through Tuesday, but northeast winds were likely to move into parts of the coastal waters Wednesday with gusts to 25 knots possible, the weather service said. There was a small chance these winds could continue at times Thursday and Friday.
City News Service contributed to this article.
