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2020 - 2021 California and Southwest Weather Discussion Thread


Thunder98

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I don’t think one day has been subnormal for LA County this July. No crazy extremes or 2015-like action, but we’ve been spared No-sky July and it’s been great for beachgoing. Boring, but generally pleasant. Nothing wrong with average!
 

Some slopover storms would be awesome, and there’s still time. We’re a little more than halfway through meteorological summer right now.

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1 hour ago, Pn1ct0g3n said:

I don’t think one day has been subnormal for LA County this July. No crazy extremes or 2015-like action, but we’ve been spared No-sky July and it’s been great for beachgoing. Boring, but generally pleasant. Nothing wrong with average!
 

Some slopover storms would be awesome, and there’s still time. We’re a little more than halfway through meteorological summer right now.

It won't be long from now that the Santa Ana's will return.

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The Pacific High naturally starts to loosen its grip in July, so this is expected. Every so often it holds fast all summer long, and we get 2010 or 2020 conditions. NW winds were so entrenched last year that the waters off SD dipped to near winter levels in July!

Breeze finally kicking in here. It’s amazing what delaying its onset an hour or two can do for highs at the coast. 

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Extended seems to call for more of the same. Slightly warmer than historical average (but average for recent years).
 

The biggest change you can see comparing 1991-2020 normals to older ones is the marked rise in average nighttime lows, especially inland. 50s in July are largely a relic of the past for the San Fernando Valley except during unusually cool years. 
 

Plus, the number of 90+ days in central LA has skyrocketed compared to older data.

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Also — especially in the last decade or so, fall keeps getting longer and warmer. Heating the oven for the Thanksgiving turkey hits different when it’s 75 degrees out and the lows are around 60, as does wearing a Halloween costume in summer-like temps and upper 60s dews. Even 2020 gave us a pretty warm fall to compensate for Fogust and the first half of Septembrrr. Cold/wet vs. mild/dry winter patterns are also more pronounced—compare the chilly soaker of 2018-2019 to the non-winter of this year.

In fact subjectively, for the coastal areas I’d say our falls and winters have changed the most and spring the least (though spring heatwaves inland are more common than they used to be).

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