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Are there any weather geeks who live in California here?
Posted by: freeradical
Date: July 27, 2021 11:32AM
What's the source of the moisture last night and today? It's actually kind of humid here in Sacramento, and they say that there might even be a thunderstorm this morning. The NWS radar site shows bands of precipitation all up and down the west coast. Last night, the radar even showed rain down near San Luis Obispo. What's going on?
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Re: Are there any weather geeks who live in California here?
Posted by: numbered
Date: July 27, 2021 11:38AM
Daniel Swain of UCLA writes a blog called WeatherWest. It is occasional, but interesting for folks in the water community. On Sunday he said:

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I continue to be fairly impressed by the extent and depth of projected moisture and instability across a good portion of California at various points over the next few days. This will be a true monsoonal surge–with distinct easterly flow over SoCal, and southeasterly flow across NorCal–complete with multiple easterly waves that will provide some mid-level lift and focal points for convective activity. Additionally, a weak low pressure system off the central CA coast will offer some mid-upper diffluence over the regions through mid-week–further enhancing the mid-level dynamics that are sometimes missing during monsoonal surge events.

This looks to be a classic, relatively high-end monsoonal pattern across CA.

Unfortunately, in the same post he also said:

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Vegetation flammability continues to track record-high levels for date across interior CA, w/some areas near previous all-time values–despite still being 1-2 months from peak. Lightning ignition efficiency could be high even if there is brief precip w/lightning.
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Re: Are there any weather geeks who live in California here?
Posted by: Bo
Date: July 27, 2021 12:02PM
Past two days have been kind of odd here in the bay area...very balmy and kind of humid. Especially for late July when we are usually cooking all day long.
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Re: Are there any weather geeks who live in California here?
Posted by: Filliam H. Muffman
Date: July 27, 2021 12:05PM
Thank you numbered. There are a couple of sites like Daniel Swain, where someone will keep a running log for a region. I continue to mourn the loss of WeatherSpark and the NOAA ROMANS servers, they were the best sites for reviewing the previous weeks weather.

Yes, there was a somewhat stationary low off the tip of Baja California kicking monsoon moisture into parts of the SouthWest. It was responsible for scattered flooding in Southern Nevada and Arizona.



In tha 360. MRF User Map
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Re: Are there any weather geeks who live in California here?
Posted by: freeradical
Date: July 27, 2021 12:40PM
That looks like a good blog.

Thanks
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Re: Are there any weather geeks who live in California here?
Posted by: btfc
Date: July 27, 2021 04:12PM
Bringing much needed rain to my Oregon place (not far from the Bootleg fire).




[www.star.nesdis.noaa.gov]
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Re: Are there any weather geeks who live in California here?
Posted by: bfd
Date: July 27, 2021 11:42PM
Annual monsoonal moisture and a low pressure system over Az that moved west and then up the state. Lake Cuyamaca (about 35 miles away and 4000+ft higher) had over 2 inches yesterday.
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