2020 - 2021 California and Southwest Weather Discussion Thread

[Anti Marine Layer]

Looks like Monterey finally picked up 0.02" last night.

[Anti Marine Layer]

2.94" so far today in Crescent City.

[Pn1ct0g3n]

Fog has rolled in as the approaching storm pushed the marine layer ashore.

[Thunder98]

Seeing drizzle marine layer, Nice to see something fall out of the sky.

[Anti Marine Layer]

Tomorrow Joy to the World, Jingle Bells, Let it Snow and The First Noel will be playing on Hallmark Channel and it will be 24-7 Christmas movies until New Year's 2022. 

Halloween is in 10 days. 

[Anti Marine Layer]

Rain might be starting in Monterey.

[Anti Marine Layer]

3.57" now for Crescent City. Monterey gets another 0.02".

[Anti Marine Layer]

Marine layer has started to deepen.

[Thunder98]

20 minutes ago, Mr Marine Layer said:

Marine layer has started to deepen.

Still fog level here and it's clearing up now revealing areas of high and mid level clouds.

[Anti Marine Layer]

High clouds are making shadows on top of the low clouds.

[Timmy Supercell]

Nice that the models were right in that NorCal gets more rainfall out of these AR's than us!

[Anti Marine Layer]

Clearing of the low clouds looks to be a slow process today.

[Pn1ct0g3n]

It’s really something how different 60F feels with dampness and fog than it does on a dry, clear morning.

[AquariusRadar]

This LA Times article describes the Atmospheric River Atmospheric River

https://www.yahoo.com/news/series-storms-atmospheric-river-barreling-181229757.html

I have copied the article illustration and annotated the Cumulo-Nimbus clouds CN A and CN B for both the coastal mountain case and the Sierra Mountain case where aquariusradar can be used to alleviate flooding if the Atmospheric River does indeed turn out to be a class 4-5. For coastal flooding of a river drainage basin or from burn scar flooding, the microwave energy is focused on CN A which slows the development of CN A and allows CN B to take up the added moisture. More rain falls from CN B on the summit or valley side of the mountain(s). Less falls from CN A on the burn scar or flooded coastal side.  In the Sierra case, again CN A is targeted and less rain falls on the burn scar western slope. CN B takes up the added moisture and more moisture falls as snow above the snow line and on the mountain crest. Because CN cells are always in competition for moisture, the inhibited CN cell yields moisture to the neighboring uphill or downwind CN cell. Overall rainfall is unchanged. Water is transported to storage. Snow in the Sierra case. Maybe a reservoir in the coastal case or maybe snow on Shasta or Lassen if in far Northern California.

[Thunder98]

Dewpoints are very high today. Current 62F temp with dp of 60F. 

[Thunder98]

[Anti Marine Layer]

Last day of 2021 that the sun reaches 45 degrees above the horizon today here.

[AquariusRadar]

Mammoth Mountain, Ca. opening ski two weeks early.

 

[Anti Marine Layer]

Low clouds finally burned off around 12 pm.

[Pn1ct0g3n]

4 hours ago, Rainstorm420 said:

Dewpoints are very high today. Current 62F temp with dp of 60F. 

System is tapping into a warm moisture vein. AR’s tend to do that and come with much higher DP’s and rainfall totals than the more common Gulf of Alaska storms. 

[Pn1ct0g3n]

1 hour ago, Mr Marine Layer said:

Low clouds finally burned off around 12 pm.

Not so in the stratus-weary South Bay.

[Anti Marine Layer]

Cool breeze remains this afternoon, but it's pretty warm in the sun.

[Anti Marine Layer]

1 hour ago, Pn1ct0g3n said:

System is tapping into a warm moisture vein. AR’s tend to do that and come with much higher DP’s and rainfall totals than the more common Gulf of Alaska storms. 

Warmer ocean water would make things more fun.

[Thunder98]

Cloudy this evening and the atmosphere is already getting primed for Monday!

 

[Thunder98]

There's two types of low clouds right now. The regular stratus clouds and also fog at the same time. Also some mid and high level clouds too.

[Anti Marine Layer]

Leaves are starting to change color.

[Thunder98]

Drizzling outside

[Thunder98]

I think it's safe to say I won't see anymore 90's for the rest of the year. So means I will most likley see only 1 day of +90F weather this year. Really mild this year for sure.

[Anti Marine Layer]

1 hour ago, Rainstorm420 said:

Drizzling outside

Marine layer attack.

[Anti Marine Layer]

1 hour ago, Rainstorm420 said:

I think it's safe to say I won't see anymore 90's for the rest of the year. So means I will most likley see only 1 day of +90F weather this year. Really mild this year for sure.

Still could. Last few years we had some 90s in early November. San Diego reached 100 in early November 2010 after their gloomiest summer ever.

[Anti Marine Layer]

Low clouds are in for the night.

[Reg]

It was a decent amount cooler here today, only 76F and that was very brief.

[Anti Marine Layer]

Drizzly morning in late October.

[Reg]

Dense fog here last night and this morning, always a pleasure.

[Thunder98]

Excited to see some decent moderate to heavy rain on Monday!!!!!!!!!!!!! 

[Anti Marine Layer]

Raining here now, not just drizzling.

[Anti Marine Layer]

0.07" now for John Wayne Airport. 

[Anti Marine Layer]

Fairly typical deep ML day today ahead of our real weather event.

[Anti Marine Layer]

Solar noon is at 12:34 PM (1934 UTC) today, and it will be that way for the next 21 days. Earliest solar noon is November 2.

[Anti Marine Layer]

Those satellite images take forever to load.

[Anti Marine Layer]

Reverse clearing now.

[Anti Marine Layer]

Bay Area forecast discussion says to be prepared.

Quote

Ahead of the event, we recommend taking today as a day of
preparation. Today is a perfect day to make sure you are ready for
the strong winds, moderate to heavy rain, and the possibility of
power outages. Charge your phone and battery back ups, tie down
outdoor furniture and trash cans, check your emergency kit
supplies, know where and how to get updates from your local
emergency management, and clear storm drains and gutters.

 

[Thunder98]

Lots of altostratus clouds right now moving in. The storm is coming!

[Pn1ct0g3n]

Looking more and more ominous as the altostratus thickens here too. We’re only seeing the fringes of it until the main event on Monday.

aside note, the days are really feeling short now. Before I know it I’ll be eating dinner in total darkness.
 

 

[Thunder98]

Looks I'll likely see 1.25" of rain on Monday. Extremely good and more than double the avg rainfall for October. Wettest Oct since 2016?

[Thunder98]

Tomorrow is probably going to be one of those classic overcast before the storm days. I love those kind of days.

[Anti Marine Layer]

38 minutes ago, Rainstorm420 said:

Looks I'll likely see 1.25" of rain on Monday. Extremely good and more than double the avg rainfall for October. Wettest Oct since 2016?

We need the rain!

[Anti Marine Layer]

Solar declination is now more than half way from the Equator to the Tropic of Capricorn.

[Thunder98]

The Marine layer clouds is now coming in. The atmosphere is getting ready for the storm!

[Anti Marine Layer]

2 hours ago, Rainstorm420 said:

The Marine layer clouds is now coming in. The atmosphere is getting ready for the storm!

In other places, storms don't need a marine layer to help prepare the atmosphere.