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2020 - 2021 California and Southwest Weather Discussion Thread


Thunder98

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Most of the really cold water is from Los Angeles County and north. Usually it does not get past Pt Conception/Lompoc this time of year. However, it seems some nights the northwest winds were so strong that it disrupted the low clouds over parts of Los Angeles County, with Downtown L.A. starting out sunny while Orange and San Diego counties were cloudy.

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I wish were having Houston weather right now...

 

hhin.PNG

I actually loved the high humidity that’s been common in our summers in recent years, and I love me a good thunderstorm. I don’t meet too many others around here who like that tropical feeling, but I can’t get enough. And 2020 is failing to deliver.

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Still cloudy right now but the sun is trying to come out. This has to be the most gloomiest July since 2010. It's so weird how Sunny and bipolar the temps were during the May and the first half of June for Santa Maria then once the 2nd half of June hit, it became much cloudier and cooler ever since.

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Avalon Harbor, 73

Avalon Airport, 91

Quite the inversion there! A little ocean warming should bring those numbers closer together I’d think.

 

Wild differences in beaches today:

66 in Malibu

70 in MB

72 in Ventura

74 in Santa Monica and at LAX

76 in PV Estates

84 in Long Beach

77 in Huntington

74 in Newport

73 in San Clemente

80+ in San Diego

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Dawned warm and balmy in MB. How hot I turn my shower in the morning is a good proxy for overnight lows; I’ve had it almost piping hot all July which is atypical. This morning I only turned it up to lukewarm, indicating the low must have been over 63 or so. If the low is over 68, I use no hot water at all. Conversely if it’s below 50 I turn it up to near scalding and want to stay in much longer.

 

Southerly surge you say? Any idea when it will reach LA County? Fingers crossed for the eddy to bring warmer water our way. Wind still W @ 6 here.

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Southerly surge seen here.

 

20202141246-20202141651-GOES17-ABI-PSW-02-600x600.gif

 

Funny forecast discussion

 

 

Two southerly surges are impacting our region this morning, one in
the desert and one along the coast.
In the desert, the heat is on
the rise, but lower deserts are running from 9 to 18 degrees off
yesterday's incredible pace at this time of morning. Humidity was
low overnight, allowing for desert areas to cool into the 80s
overnight (unlike early Friday), but a healthier gulf surge has
brought higher dew points and humidity into the lower desert,
explaining the much slower temperature climb this morning. It's
actually quite windy in the Imperial Valley and Yuma. The higher
dew points should mix out some today and allow for a good rise in
temps this afternoon, but may not come very close to the
impressive numbers from Friday, or those in our forecast. A fog
bank developed overnight along the coast in Mexico and the coastal
eddy did not wait for his turn, but cut to the front of the line.
The southerly surge of fog has already shrouded southwest San
Diego County and will be touching most of the county's coast at
times today.
Orange County should start getting it late afternoon
and evening. This robust move by the marine layer prompted a
forecast update to accommodate mention of coastal fog during the
day, more coastal clouds overall through evening, and to lower max
temps near the coast. Luckily, this fog is not on the deck, as
visibility at North Island was reported at a non-hazardous 2.5
miles. Patchy dense fog is possible today and tonight, but on the
coastal mesas. That fog bank will have to contend with a very hot
and dry air mass not too far inland. That will make cloud/fog
coverage tricky to forecast tonight into Sunday. Strong high
pressure aloft that has been sponsoring our heat wave has already
begun to relent and will continue to do so as a trough along the
Northwest coast deepens a little over the next few days. This will
feed the coastal eddy, allowing for greater coverage of low
clouds and fog farther inland each night/morning through at least
Wednesday. It will also bring a meaningful cooling trend.
Starting Tuesday we'll begin to see max temps fall below normal.
No real change later next week as the weak West Coast trough keeps
the flow aloft dry from the southwest and temps near to slightly
below normal.

 

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Extended forecast calls for at least six consecutive days of coastal chill, with highs failing to break 70 and lows as cool as 58. Record-challenging nighttime lows for Manhattan Beach in early August I believe. Those temperatures are very May-like and I haven’t seen a July or August night fall below 60 since 2010 or maybe 2011.

 

I’m keeping an eye out for premature fall color on the trees here.

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