High temperatures for the next week will generally range from a few degrees above average near the coast to 5 to 10 degrees above average for the mountains and deserts with some slight day to day differences. Moderate HeatRisk will continue for the deserts through next Wednesday. Night and morning coastal low clouds will spread into portions of the western valleys late each night. There is a slight chance of showers near the mountains on Friday afternoon.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
New Aviation and Marine Discussion,
(today through Saturday), Satellite imagery shows greater coverage of low clouds than 24 hours ago with widespread low clouds over the coastal waters extending into coastal areas. The low clouds are expected to continue spreading slowly inland through sunrise into portions of the western valleys. Night and morning low clouds will continue to spread into portions of the western valleys late each night into the weekend.
High temperatures for the deserts will warm a few degrees today with not much change for Friday and Saturday. High temperatures for the coast and valleys will cool slightly today, warm a few degrees on Friday, then cool a few degrees on Saturday. Through Saturday, high temperatures will generally range from a few degrees above average near the coast to 5 to 10 degrees above average for the mountains and deserts. High temperatures for today will range from the lower to mid 70s near the coast to the mid 80s to mid 90s in the Inland Empire with 106 to 110 for the lower deserts. Moderate HeatRisk will continue for the deserts into next week with the greatest coverage of moderate HeatRisk for the Inland Empire on Friday.
As a weak upper level low pressure system centered near the Pacific coast of central Baja moves slowly toward the west and into the Pacific the next few days, some mid level moisture could spread into portions of southern California on Friday and Saturday. There could be a few showers, mainly during Friday afternoon, and mainly near the mountains from the San Bernardino Mountains southward.
For Friday through Sunday, several coastal and mountain locations could have new daily record or near record warm minimum temperatures. The surface water temperature at Scripps Pier on Wednesday of 21.3C/70.3F was in the 5 percent of warmest for the date while the water temperature at around a depth of 5 meters was 21.2C/70.2F, a new record warmest for the date.
(Sunday through Wednesday), High temperatures for the mountains and deserts will remain around 4 to 8 degrees above average through next Wednesday. For the coast and valleys, high temperatures will cool a few degrees from Sunday through Wednesday, cooling from within a few degrees of average on Sunday to a few degrees below average on Wednesday. High temperatures on Sunday will range from the lower to mid 70s near the coast to the mid 80s to mid 90s for the Inland Empire with 108 to 112 for the lower deserts. Moderate HeatRisk will continue for the deserts through next Wednesday. Night and morning coastal low clouds will spread inland into the western valleys at times.
111730z, Coast/Valleys, Low clouds have cleared most coastal areas with a small area clinging to the northern part of the Orange County coast. SCT/BKN high clouds are moving in from the south with bases AOA 20000 ft MSL that will continue to spread north over the area through the period. Low clouds will begin to drift in along the coast after 03Z Friday, filling and pushing in approximately 15 miles around 05Z. Minor vis reductions 4-6 SM will be possible for elevated coastal terrain overnight. Low clouds will begin their retreat to the coast after 15Z-16Z Friday, clearing by 17Z-18Z.
Mountains/Deserts, VFR conditions expected through the TAF period with high clouds AOA 20000 ft MSL.
No hazardous marine conditions are expected through Sunday.
Ca, Beach Hazards Statement until 5 PM PDT this afternoon for Orange County Coastal Areas-San Diego County Coastal Areas.
PZ, None.
