We have a trough of low pressure off the coast which has kept cloud cover and cool temperatures in play for the Central Coast. So, let’s get right to it: will there be clouds on the 4th? The answer is yes, however some partial clearing is showing in the models. Also the base of the marine deck looks to be above 1000ft. Most fireworks detonate under 1000ft. So, I am cautiously optimistic about viewing but it is certainly not a slam dunk nor ideal forecast.
The upside is that temperatures will be very mild for the 4th, perhaps even on the cool side. Coastal valleys will hit the 70s, beaches in the 60s and inland temps in the upper 70s and low 80s. I’d suggest to celebrate the cool conditions because the forecast looks blazing hot Friday thru the weekend.
Inland temps will be 105-110 Friday thru Sunday. Coastal valleys will hit the mid 90s to perhaps 100 Friday and Saturday. Beaches will be in the upper 70s to near 90 Friday and Saturday.
The key to this huge change in the forecast is building high pressure and offshore winds. Thursday is a transition day where some offshore wind will develop, Friday morning the offshore winds will be strong early before turning NW in the afternoon. All this will dramatically change sky conditions, we will clear.
At the coast there is some relief returning late Sunday into Monday with marine layer rebounding however inland it’ll take time for cooling to work in. Monday could still be near 100 in interior valleys before dropping back a little.
The ridge of high pressure looks to hang around however, producing extended warm conditions inland thru the middle of the month.