Marine influence dominant near the coast

Posted at 4:31 PM, Apr 23, 2018
and last updated 2018-04-23 19:31:45-04

We might technically be a little more than a week before "May Grey" but the pattern is in place.  We have generally light onshore flow, not nearly as windy as last week.  That will mean we won’t get a lot of mixing which will allow the marine clouds to form in the night and morning hours near the coast with sluggish clearing and some beaches may not clear at all.

This sets up microclimate-type temperatures (a lot of difference between beach, coast and inland areas).  The coolest beaches will be in the low 60s for the next few days with most beaches short of 70.  Coastal valleys in the upper 60s and lower 70s and inland temps in the mid-80s Tuesday but backing to the upper 70s by Thursday.

Thursday-Sunday an interesting upper low will push over northern California.  Locally it will increase the winds Fri-Sunday producing better clearing of coastal clouds and bringing inland temps down into the lower 70s but not much change in temps near the coast despite more sun.

I don’t think we see any rain, but higher elevations in the Sierra could see thunderstorms.

Another mid-level low early next week could deepen the marine deck enough for mist/drizzle or a light shower but nothing significant in sight.