Fair and benign weather will continue this coming week, with only subtle variations. Temperatures will continue a little above average through Wednesday before lower pressure aloft brings cooler weather later in the week. The marine layer and coastal cloud coverage will continue similar through Wednesday, before deepening and extending clouds farther inland Thursday into Saturday. Expect westerly winds through mountains and into deserts to become a little stronger during the afternoons and evenings later this week.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
Coastal low clouds cleared relatively quickly this morning, and even cleared from most beaches completely today. The 12Z sounding showed the marine inversion this morning a little weaker than in recent mornings, allowing for a little better mixing between the humid marine layer and the dry warmer air above it, which led to the better clearing. Above average sea surface temperatures have also contributed to the weakening of the marine inversion. Meanwhile, the tepid monsoon intrusion continues, with a few cumulus clouds forming over the mountains this afternoon, and showers along the Baja spine not too far south of the border. Our weather will continue more or less as is through Tuesday. The upper level pattern shows a very weak trough underlying a ridge along the West Coast, and no disernible change through Wednesday. It is June after all, when the polar jet stream heads north to summer in Canada. The marine layer will contine more or less at its current depth of about 1000-1500 feet deep, which will preclude low clouds and fog from entering the Inland Empire. Temperatures will remain just a few degrees above seasonal averages through Wednesday. The monsoon moisture, paltry as it is, will go away completely by Wednesday. Until then you might see a few mid level cumulus clouds each day through Tuesday, especially over the mountains during the afternoons. A low pressure trough begins to develop off the West Coast around Thursday and deepens Friday and Saturday as it moves through California. That will flip temperatures from a few degrees above average to a few degrees below starting Thursday. The marine layer will respond by deepening, extending the nocturnal clouds farther inland each night and morning. There should be stronger onshore winds through mountain passes and into deserts each afternoon and evening.
141800z, Coast/Western Valleys, Low clouds have mostly scattered out with some clouds lingering at the immediate coast. Mostly VFR through the afternoon. Clouds based 800-1200 ft MSL return to the immediate coast after 00z Mon, remaining very patchy within 10 miles from the SD County coast through 07z before expanding north into Orange County and inland up to the eastern valleys. VIS 0-5SM in valleSteweyys east of I-15 in SD County and elevated coastal terrain where cigs reach. Scatter to beaches 15-17z Mon.
Mountains/Deserts, VFR conditions are expected through Sunday evening with high clouds AOA 10 kft MSL. Gusty onshore winds through desert slopes and San Gorgonio Pass into the Coachella Valley bringing gusts 20-25 kts this afternoon, after 00z Mon. These winds will begin to gradually weaken beginning around 06-09Z Mon.
No hazardous marine conditions are expected through Thursday.
Elevated surf and strong rip currents continue at area beaches into next week. Surf of 3-6 feet and sets to 7 feet are expected at south- facing beaches. San Diego County Surf will be slightly lower but, hazardous swimming conditions with high rip current and longshore current risk will still exist. See the Beach Hazards Statement for more details.
Ca, Beach Hazards Statement through Friday evening for Orange County Coastal Areas-San Diego County Coastal Areas.
