For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
A rinse and repeat sort of day across the region today as low clouds dissipate this morning near the coast with a coastal eddy offshore. Formed last night, bringing in low clouds to coastal areas this morning. Temperatures will be more comfortable today with highs near normal across the region.
A weak troughing pattern over the West will be reinforced with another shot of cooler air as another low pressure system moves southward Tuesday through Thursday. Pressure heights will continue fall, leading to a continued subtle cooling trend. Wednesday and Thursday will see the coolest temperatures of the week. There is a 75-100% chance of temperatures across the Inland Empire, Coachella Valley and the large High Desert cities staying below 90 degrees these days; plentiful 70s and 80s expected for areas along and west of the mountains. Low temperatures will also begin to cool off through the next few nights as well, with lows in the 50s and 60s along and west of the mountains and in the high desert. Increased sea breeze winds will be felt along the desert slopes and into the deserts each afternoon and evening through Thursday, some areas gusting over 35 MPH in the passes and High Desert.
The low pressure system to the north will move out by Friday into the weekend. Models begin to diverge on what exact pressure systems move over the area, but consensus continues to shift toward whatever does form will be weak in nature. This will lead to temperatures staying near average for the latter part of the week with weaker winds across the mountains and deserts.
141800z, Coast/Valleys, SKC and VFR this afternoon, but low clouds based 1700-2100 ft MSL will move back ashore starting 01-02z Tue. Clouds spread inland overnight, filling most of the coastal basin by 12z. Minor vis reductions (3-6SM) for elevated inland valleys (KONT, KSBD, KL18). Clouds scatter back toward the coastline 16-18z.
Mountains/Deserts, Mostly clear and VFR conditions through Tuesday morning.
No hazardous marine conditions are expected through Saturday morning.
Ca, None. PZ, None.
