High temperatures the coast to the coastal slopes of the mountains will warm several degrees today with faster inland clearing of night and morning coastal low clouds today and Tuesday. Warming will expand into the deserts on Tuesday and continue on Wednesday as the coast and valleys begin to cool on Wednesday. Not much change in high temperatures for Thursday through Sunday with high temperatures a few to around 5 degrees above average. A more persistent coastal eddy will bring greater coverage of night and morning coastal low clouds for the middle of the week with low clouds spreading into the western valleys for early Wednesday and into the inland valleys for early Thursday.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
New Aviation and Marine Discussion,
(today through Wednesday), Northwest to north winds for the mountains and deserts will become north to northeast this morning, then diminish through the afternoon. High temperatures for the deserts will be a few degrees cooler today. High temperatures for the coast to the coastal slopes of the mountains will warm several degrees today, as much as 10 to 15 degrees for the Inland Empire. There will be warming for most areas on Tuesday with high temperatures as much as 5 to 10 degrees warmer for the mountains, deserts, and inland valleys. For Wednesday, the coast and valleys will begin to cool while high temperatures for the mountains and deserts warm another few to around 5 degrees.
While a weak coastal eddy will continue at times through Tuesday, mainly nights and early mornings, low clouds should clear faster for inland areas, especially on Tuesday. However, the local NAM- bounded WRF shows a more persistent coastal eddy developing Tuesday night and continuing into Thursday with more widespread coastal low clouds spreading into the western valleys for Tuesday night into Wednesday morning and into the inland valleys for the Wednesday night into Thursday morning as the marine layer deepens.
181800z, Coast/Valleys, Low clouds have cleared most areas in OC and the Inland Empire, with low clouds with bases 2500- 4000ft MSL clinging to inland and coastal San Diego county for another hour or two. Low clouds may return this evening (30-50%) to coastal areas with the highest chances in coastal San Diego between 13-17Z. if low clouds do develop, bases would be AOA 1500ft MSL.
Mountains/Deserts, Northerly winds will bring gusts 25-35 knots through and below mountain passes through 20-22Z. Pockets of LLWS and downdrafts in lee (south and west) of mountains will be possible.
No hazardous marine conditions are expected through Saturday.
Ca, None. PZ, None.
