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2020/2021 California and Southwest Weather Discussion Thread


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Nice showers for Reg and south of Salton Sea. A nice flow of Pacific moisture helping a small popup cyclone just south of Yuma.

 

It is interesting that the very driest part of the blocking high (as viewed with the upper water vapor image) has moved rather quickly- over the last 48 hours -to a position SE of the Hawaiian Islands. 

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0.04" from showers here, even heard a couple rumbles of thunder. Hasn't cleared out yet as it remains muggy and occasionally sprinkling.

 

My personal weather station: Davis Instruments Vantage Pro 2

2021-2022 Season Total: 0.99" (as of 10/16/21)

2020-2021 Season Total: 5.40"

2019-2020 Season Total: 15.82"

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

2013-2014 Season Total: 7.35"

2012-2013 Season Total: 7.11"

2011-2012 Season Total: 7.02"

2010-2011 Season Total: 17.09"

2009-2010 Season Total: 11.59"

Average Seasonal Precipitation: 10.89" (11 years)

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 

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That driest pile of the blocking high has now moved almost south of Hawaii. The Northeast quadrant of the high is wetting up with a good flow of moisture over the top of the high into British Columbia and rain for the temperate rain forest there. The lesser flow under the belly of the beast is into the Baja low pressure and making very light showers for Southern Arizona. The next Aleutian cyclone and push of cold air might bring some rain to NorCal. If that super dry part of the blocking high stays way out there 3 thousand miles from the Pacific Coast and If the dry can stay out there, fall might be looking good for rain in California.

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Middle Arizona getting some light rain from the recent Yuma low. The flow of Pacific moisture is getting further away from the storm center so that the storm will die soon without the moisture to fuel it. The little storm is trending west right now, so with some daytime heating maybe the river towns and Joshua trees will catch a shower.

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The summer of 2021 has been so medium for coastal and semi coastal areas, it’s somehow extraordinary. When’s the last time we went from mid June to the end of September with no significant heat waves at all? We’ve had a few periods of above average temperatures but they lasted 3-4 days max, and always ended in a powerful marine push. Even 2020 with its record cool highs and lows was punctuated with some real heat, especially in September.

I can’t remember the last time we went though that whole period without a single day that makes me contemplate buying a window AC unit. There’s always at least a few.

2021 is a rare bird. Enough monsoon to recall 2015, but the Pacific is almost 2010 levels of stubborn as well.

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9 minutes ago, Pn1ct0g3n said:

The summer of 2021 has been so medium for coastal and semi coastal areas, it’s somehow extraordinary. When’s the last time we went from mid June to the end of September with no significant heat waves at all? We’ve had a few periods of above average temperatures but they lasted 3-4 days max, and always ended in a powerful marine push. Even 2020 with its record cool highs and lows was punctuated with some real heat, especially in September.

I can’t remember the last time we went though that whole period without a single day that makes me contemplate buying a window AC unit. There’s always at least a few.

2021 is a rare bird. Enough monsoon to recall 2015, but the Pacific is almost 2010 levels of stubborn as well.

Even in August 2020, we had a over a week of hot and humid weather with Thunderstorms hitting the Central Coast. This year is so England like.

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Drizzle here in Murrieta this morning, although not measurable. Very deep marine layer that is so far struggling to burn off even here.

 

My personal weather station: Davis Instruments Vantage Pro 2

2021-2022 Season Total: 0.99" (as of 10/16/21)

2020-2021 Season Total: 5.40"

2019-2020 Season Total: 15.82"

2018-2019 Season Total: 15.84"

2017-2018 Season Total: 4.63"

2016-2017 Season Total: 15.18"

2015-2016 Season Total: 8.12"

2014-2015 Season Total: 10.09"

2013-2014 Season Total: 7.35"

2012-2013 Season Total: 7.11"

2011-2012 Season Total: 7.02"

2010-2011 Season Total: 17.09"

2009-2010 Season Total: 11.59"

Average Seasonal Precipitation: 10.89" (11 years)

California Water Year/Rainy Season measuring period runs from July 1 to June 30.
 

 

 

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