Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
315 AM PDT Sat May 13 2023

SYNOPSIS...13/213 AM.

Continued warming is expected today as onshore flow weakens beneath ridging aloft.  However, cooler temperatures will persist near the coast with night through morning low clouds and fog.  Warmer than normal temperatures are then expected away from the coast Sunday through much of next week.

SHORT TERM (TDY-MON)...13/255 AM.

The marine layer is about 1100 ft deep at KLAX and near 900 ft deep along the Central Coast.  Satellite imagery shows a weak eddy and low clouds now cover all of the coasts and is making inroads into the lower vlys.  Offshore trends will allow for a late morning clearing and will also bring another 5 to 10 degrees of warming to the area.  While the marine layer will keep the coastal areas fairly cool with highs at the beaches in the upper 60s and lower 70s further inland, the vlys and interior will be in the 80s and lower 90s.  Coastal highs will be a degree or two below normal but the rest of the area will peak 5 to 10 locally 12 degrees above normal.

Expecting a similar marine cloud pattern for tonight, with low clouds across the coasts and lower valleys.

There will be about 2 mb of onshore trends both to the north and the east on Sunday.  At the same time a retrograding upper low will move into the northern half of the state and lower hgts 4 to 5 dam.  The combination of lower hgts and stronger onshore flow will lower max temps 4 to 8 degrees for most of the inland areas the coastal areas will not cool that much if at all.

Offshore trends on Monday will not be enough to prevent a fairly extensive coastal marine layer stratus pattern in the morning.  But it will be enough to bring 3 to 6 degrees of warming to most non coastal areas. Max temps inland will again be 5 to 10 degrees above normal