2020 - 2021 California and Southwest Weather Discussion Thread

[Anti Marine Layer]

Apple Fire is at 15000 acres now.

[Pn1ct0g3n]

Zero visibility starting pre-dawn in MB. The fog is gone over me, but it hasn’t yet cleared all the way to the beach. No wind yet, so there’s a good chance it will.

 

I can feel the higher dew points too. Felt damp, almost muggy when I took my morning walk.

 

Update 10:14 am: fog has given way to haze. The sea breeze onset is later than it’s been, too but it’s kicking in. Might not clear the beach today.

[Pn1ct0g3n]

Onshore flow pushing it back in. :/

 

Been seeing this a lot, where it burns off to within half a mile or so of the coast between 9:30 and 10:30, the sun shines for an hour, then the sea breeze kicks in and it returns. Often for the rest of the day.

[Anti Marine Layer]

Definitely a bit more humid today. Looks like beaches are staying fogged in while Channel Islands make holes in the fog.

 

Lima, Peru probably has the most depressing weather of any tropical location in the world.

[Anti Marine Layer]

If upwelling brings up nutrients for diversity of marine life, why are the best snorkeling areas in tropical locations with warm water?

[Pn1ct0g3n]

I can tell by the breeze that SSTs must be recovering: off a cool sea the wind is dry and stiff like an AC at full blast. It feels balmy and damp in comparison. Very comfortable in the not-quite-immediate coast area (Gardena/Hawthorne).

 

Around 2pm or so most of the low clouds had cleared out of the MB area.

[Pn1ct0g3n]

If upwelling brings up nutrients for diversity of marine life, why are the best snorkeling areas in tropical locations with warm water?

Warm water is clear water. And it’s much more comfortable to be immersed in without a wetsuit. Also, coral reefs bring the life to them in otherwise nutrient poor seas.

[Anti Marine Layer]

Fogust this week. Low clouds arrived early this evening.

[Thunder98]

For the first time in a month, the sky is actually clear this morning!

[Anti Marine Layer]

Low clouds dissipated overnight in some areas.

[Pn1ct0g3n]

Starting tomorrow, not a 70 degree day in sight in MB for the next week. T_T Also subnormal temps even inland, valleys failing to reach 90.

[Anti Marine Layer]

Climate Stations website is no longer working.

[Pn1ct0g3n]

Heavy haze. 8 degree temp difference from the coast to 2 miles inland. Microclimates have been more pronounced than usual lately. The marine layer seems shallow but the onshore flow beneath it is very strong, leading to seasonable inland temperatures with lack of beach clearing.

[Pn1ct0g3n]

Sticky! Dew points in mid-60s in most of the coastal and interior coastal areas today. More August-like in that regard.

[Anti Marine Layer]

From Los Angeles/Oxnard forecast discussion:

 

Low excitement levels for the extended period as the marine layer
seems to have lost all of its calenders and still thinks its June.
Broad west coast troffing will continue through Sunday, although
it will weaken and hgts will rise starting Friday. There will be
strong onshore flow each day esp from the west to the east.

 

[Jesse]

If upwelling brings up nutrients for diversity of marine life, why are the best snorkeling areas in tropical locations with warm water?

Completely different set of marine life there, that are adapted to very warm water. Sort of obvious.

 

And of course pretty fish to see while you are snorkeling and fish that are important to fisheries are two totally different things.

[Pn1ct0g3n]

From Los Angeles/Oxnard forecast discussion:

Stubborn troughing. Just like 2010.

[Thunder98]

I'm expecting a wetter fall this year compared to the last couple of years

[Anti Marine Layer]

Low clouds are quite thick this morning, but the overnight lows for Downtown LA are much warmer than they have been for most of the second half of July.

[Pn1ct0g3n]

Strong onshore flow spared us today. Glorious skies and near-normal temps for LA County Coast. Marine layer low clouds were definitely more of the August variety—gone by 10am.

[Anti Marine Layer]

Looks like the sea surface temperatures have finally warmed up a bit with the eddy around to prevent the upwelling.

 

 

Best way to get some really warm sea surface temperatures is to have the 4 Corners High be very strong (enough to prevent upwelling) or a weak eddy.

[Reg]

Wonderfuly breezy as I went out for my walk this evening. Coolest its felt in a long time.

[Anti Marine Layer]

Could see some drizzle again next 2 mornings. Seems to be a repeat of 2 weeks ago.

[Reg]

Marine layer has returned here inland for the first time in weeks, although it is thin (I can still clearly see the full moon through it).

[Anti Marine Layer]

Low clouds have reached Ukiah and Sacramento this morning. That's quite a deep marine layer.

[Thunder98]

The sun is already coming out and the low clouds are already dissipating. 

[Anti Marine Layer]

It's a strange clearing pattern

 

[Pn1ct0g3n]

Low clouds more stubborn today. Onshore flow quite noticeable by mid morning.

[Anti Marine Layer]

About halfway through astronomical summer today.

[Anti Marine Layer]

Strange how the lows are above 65 now for Downtown L.A. after half a month of low 60s.

[Thunder98]

It's windy and cool today, unusual for August. Feels more like late April rather than Early August.

[Anti Marine Layer]

The marine layer clearing is very random today for areas north of Pt Conception. That includes Monterey Bay Area, San Francisco Bay Area, Nor Cal, and Oregon.

[Pn1ct0g3n]

Definitely breezier than yesterday. Anaheim (my go-to representative of the inner coastal plain) running below 80, unusually cool for early August. Even valleys are staying in the mid 80s. Beaches are near normal or a bit below. At least that dismal forecast high of 68 in MB isn’t coming to pass yet.

[Anti Marine Layer]

It's windy and cool today, unusual for August. Feels more like late April rather than Early August.

Days are about the same length.

[Anti Marine Layer]

Early arrival of low clouds this evening.

[Anti Marine Layer]

Monsoon is dead, even for Flagstaff for the next 7 days.

[Anti Marine Layer]

Temporary low cloud disruption over Los Angeles County.

[Pn1ct0g3n]

Temporary low cloud disruption over Los Angeles County.

Can confirm they blew out here. What caused this?

[Anti Marine Layer]

Can confirm they blew out here. What caused this?

Not exactly sure. Sometimes the low passing overhead will weaken the inversion or mix out the clouds.

[Anti Marine Layer]

Quite a deep marine layer this morning, but no drizzle so far.