Santa Ana conditions were expected to prevail over San Diego County through Monday, with fair skies, gusty northeast winds along the coastal foothills and very warm days, the National Weather Service said.
Northeast winds were predicted to strengthen again early Monday with gusts to 35 mph in the offshore wind-prone pass and foothill locations.
High temperatures Monday are forecast to be 79 to 84 near the coast, 85 to 90 inland, 86 to 91 in the western valleys, 83 to 88 near the foothills, 75 to 82 in the mountains and 92 to 97 in the deserts, according to the weather agency.
By Tuesday morning, a shallow marine layer could return low clouds, patchy fog and much higher humidity to coastal areas, where it was expected to be much cooler, the NWS said.
Increasing onshore flow was forecast to spread cooler marine air inland during the week, with areas of night and morning low clouds and fog at times.
Strengthening onshore flow was likely to bring gusty westerly winds to the mountains and adjacent desert areas Tuesday through Thursday.
Friday has some potential to produce precipitation, but the probabilities for anything significant were very low through the end of this week, forecasters said.
Northwest wind gusts may briefly reach or exceed 20 knots in the outer coastal waters Sunday afternoon and evening. Otherwise, no hazardous marine conditions were expected through Thursday.
Updated at 11:10 p.m., Sunday, April 24, 2022