Posted by: Richard | December 7, 2014

San Francisco Bay Area and Northern and Central California Forecast Discussion- 07/17/2018 – 7AM PST

Short Term Weather 1 to 7 day Forecast Discussion   Skies are mostly clear this morning over much of California, except for low clouds along and near the coast. Weak to moderate high pressure will continue over the four corners of the United States creating hot weather for the interior but south to southwesterly winds around the high pressure area along the coast is keeping onshore winds and cooler weather closer to the coast with the usual marine layer spreading locally inland nights and mornings.  South to southwesterly winds aloft over the mountains early this week has decreased the threat of showers and thundershowers over the mountains but the chance will return later in the week when the winds turn more from the southeast and monsoonal moisture spreads northward into Central California.   Along with thunderhowers over the mountains, there is also a slight chance of a showers or a thunderhower in coastal and valley areas later Wednesday into Friday and possibly Saturday morning, but the computer models disagree on the timing and extent of the showers so stay tuned.

Northern and Central California 8 to 15 day extended forecast  The latest computer models are showing a general southerly flow into California. This will keep the marine layer continuing near the coast at times during the period.  As high pressure holds over the four corners of the Western United States, south to southeast flow will bring a chance of showers and thundershowers at times over the mountains and deserts and hot temperatures for inland valleys but remaining near normal closer to the coast. A trough will develop over the Pacific Northwest late in the period that will bring southwesterly winds aloft over the mountains and push the threat of thundershowers to the east of the Sierras.

Northern and Central California 16 to 20 day extended forecast – The latest computer models are showing a high pressure over the four corners with south to southwest flow over the state that will continue to bring warm to hot temperatures inland but cool temperatures near the coast of California as the marine layer continues into coastal valleys.



  1. Hi Richard. I have tried to subscribe to your blog and it tells me that I’m already subscribed but I am not receiving anything from you. I’ve checked my spam folder but nothing is appearing there either. Any ideas?

    Also, I’m wondering if you could give me any idea of how El Nino will be affecting Baja California this January? My family is contemplating a trip there in early January and I’m worried about the possibility of heavy rains. I’ve searched for weather models on-line but haven’t been able to find something for that area.
    Thanks much!

    • Hi Susan, I am not sure how to subscribe to my blog,,,,are you wanting notifications. I just assumed people will do what I do which is to bookmark the site and look at it whenever you want. As for January weather in Baja, it would be impossible to get a forecast that far out in time and it is still to early to use El Nino or La Nina to help you as we are not sure which will be true at this point. Generally, Baja weather is similar to San Diego weather which is impacted by the jet stream over California. If you want dependable weather in Mexico in Janary, go further south into Mexico like Puerto Villarta or Cancun and the Yukatan Peninsula where the northern jet stream has not effect. PV is a great city.

  2. Simply wish to say your article is as astonishing. The clarity for your post is simply cool and that i could assume
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    • Thanks for your comment. Where are you located? This coming week will be quite interesting for the Bay Area as the jet stream will be aimed at Central California and the Sierras which could add quite a bit of snow pack that is much needed to completely end our drought. The idea of notifications is an interesting idea, but I often revise the forecast several times per day. You may not be interested in minor forecast changes.


  3. Admiring the commitment you put into your blog
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  4. Gold Price,

    Thanks for your comments. I hope you stay in touch.


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