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Rain In the Forecast This Week, First Snow Possible in the Mountains

An upper level low pressure system will move through the area, bringing a chance for rain and thunderstorms through midweek. Colder air aloft will provide a chance for snow at higher elevations.

Fall will assert itself this week as a cut-off low pressure system (so named because it is "cut off" from the jet-stream) meanders its way towards the California coast. As it approaches, we can expect an increase in clouds and eventually a chance for showers late Tuesday night.  Add a thunderstorm chance on Thursday with colder air aloft moving into the region.

The latest National Weather Service forecast discussion didn't really lend any insight into their thinking on rainfall amounts, but a quick glance at the model runs myself has me thinking we could see anywhere from a tenth to a half inch of rain by the time things are all said and done. That amount could be higher if the thunderstorm chance on Thursday pans out.

In the higher elevations, forecasters are calling for the first snow of the season, with as much as one to three inches possible on the peaks of the San Gabriel Mountains. 

Temperatures will be mild, with highs only reaching the low 70s on Wednesday and Thursday, with temperatures recovering to the 80s towards the weekend as the low pushes east and is replaced by high pressure.

Weather should quiet down on Friday and return to a typical Southern California dry pattern through the weekend. Temperatures should return to normal with mostly sunny skies.

This post is contributed by a community member. The views expressed in this blog are those of the author and do not necessarily reflect those of Patch Media Corporation. Everyone is welcome to submit a post to Patch. If you'd like to post a blog, go here to get started.

Rich Addams October 10, 2012 at 07:26 PM
I really like the fact that we have our own local weatherman as a columnist for Patch.
Grant Miles October 11, 2012 at 04:35 AM
Very kind of you to say, Rich. Thanks. A little more info as the National Weather Service released their Wed 8 PM discussion... It looks like we still have a great shot at some rain tomorrow, but since there is no cold front associated with this cut-off low, showers will be spotty in nature. We could see a lot of rain, we could see very little rain. Some areas could see a bunch while other areas see not so much. That's just the nature of this kind of low. One thing that does look good is the chance for some of those spotty showers to strengthen into thunder-boomers. The NWS was throwing around terms like heavy rain, hail, cloud-to-ground lightning, and even a stray waterspout (tornado over water) cannot be ruled out, so if you encounter ANY of these, do take it seriously and head for shelter.
Grant Miles October 11, 2012 at 10:40 PM
Getting really active out there! You can follow my comments and updates on Facebook (https://www.facebook.com/StudioCityWeather), Twitter (@StudioCityWx), and on my homepage http://www.studiocityweather.net

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