Cooling will spread inland into the weekend with high temperatures on Sunday around 10 to 15 degrees below average for inland areas. Chances for showers will begin increasing on Friday and be highest during the weekend. There remains a fairly wide spread in potential rainfall with around a 50 percent chance of 0.50 inch or less from the coast to the mountains with a 15 to 20 percent chance for 2 inches or more. Tides will remain elevated through much of this week with near record water levels resulting in coastal flooding.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, UPDATED AVIATION DISCUSSION,
(today through Thursday), High temperatures will cool a few degrees per day for today through Thursday with high temperatures a few to around 5 degrees below average. High temperatures on Thursday for the coast and valleys will be mostly in the lower to mid 70s, for the mountains in the mid 40s to mid 60s, and for the lower deserts in the lower to mid 80s.
Patchy low clouds will return to coastal areas this morning with increased coverage and greater inland spread into the western valleys for tonight into Wednesday morning. There will be increasing high clouds for Wednesday night and Thursday.
(Friday through Monday), The cooling trend will continue into the weekend with high temperatures on Sunday 10 to 15 degrees below average for inland areas and 15 to 20 degrees below average for the mountains above 6000 feet. High temperatures on Sunday for the coast and valleys will be mostly in the 60s, for the mountains in the mid 30s to mid 50s, and for the lower deserts in the lower to mid 70s.
Rainfall chances during the weekend are greatest for Saturday night into Sunday morning and especially for late Saturday night into Sunday morning. There remains a wide range in potential rainfall. ECMWF ensemble uncalibrated rainfall for San Diego has 40 percent of members with 0.50 inch or less with 15 percent of ensemble members having 2 inches or more. Half of ECMWF ensemble members have precipitable water at San Diego for late Saturday afternoon and Saturday evening increasing to 1.5 inch or greater, somewhere around 250 percent of normal.
For Saturday morning through Sunday night, the chance for 1 inch or more of rainfall from the coast to the mountains ranges from 25 to 30 percent for Orange and southwestern San Bernardino Counties to 35 to 40 percent for San Diego County.
271130z, Mostly clear today, followed by gradually increasing high clouds above 10 kft tonight. Very patchy and intermittent coastal low clouds based around 1500 feet MSL through 15Z. Better chance for coastal cigs with similar bases after 03Z into Wednesday.
No hazardous marine conditions are expected through Saturday.
High tides during the late mornings will generate significant coastal flooding this week. Tides will be anywhere from 1.5 to 1.7 feet above astronomical predictions, likely raising high tides above 8 feet, peaking this morning. A Coastal Flood Warning contains the details.
Ca, Coastal Flood Warning until 1 PM PDT Thursday for Orange County Coastal Areas-San Diego County Coastal Areas.
PZ, None.
