A number of things to go over with and with three alerts now on the Southern California Weather Force alert system for New Years Eve into New Years Day, from Santa Ana Winds, Rain, Snow, Ice/Freezing Rain, and Colder Air.. keep reading on for details in your area.
The system will start early New Years Eve Morning as a mid-level dynamic starts to enter the area out of the north. Most precipitation will be likely surrounding the Escondido areas through then and the day, however some drizzle/light rain is possible as far west as Los Angeles and Orange County, with an evening brief for Ventura’s Ojai zones.
The morning will come the first alert issued now on the site. A Freezing Rain Advisory for the Kern County Mountains, including the Gorman Pass/Grapevine area. A backdoor cold-front will make its way through the forecast zones on New Years Eve Morning. Freezing temperatures at the surface combined with warmer temperatures in the low/mid levels would make for instant freezing of any rainfall that hits. This would be called freezing rain. Roads could be icy and therefore dangerous, especially in the pass locations. If the front is colder than it could be a dusty of snowfall… however since I am seeing the slightly warmer layer, freezing rain/ice is more likely, becoming less likely a few hours after sunrise. Be very careful traveling this advisory area in the morning.
Next is the Winter Weather Advisory for the Riverside and San Diego County Mountains. A backdoor cold front will enter the area on New Years Eve Morning, lasting through the day. A dusting to up to 2″ of snow in spots is likely above the 5,000 FT mark. Wet snow to 4,000 FT is possible along with sleet to 3,000 FT. It will be icy in spots .. travel in this area must be met with caution. Gusty winds will accompany the system.. including after it through the night into New Years Day. Wind chill factors will be in the single digits.
This is all happening above on New Years Eve Morning/Afternoon/Evening before the Santa Ana Wind Warning takes hold. A backdoor cold-front will bring a chance of rainfall for some Inland Empire and most San Diego Coast/Valley areas, including some near foothill OC locations over the day on New Years Eve. However, after the front fully passes we will ramp up the northerly flow and a very powerful upper level jet will position that evening into the night as we ring in 2019 with gusty, sometimes damaging winds..lasting through New Years Day. The SCWF Wind Forecast Model with the Martin Wind Gust Scale is ready to be viewed by premium members below. However I can give some preliminary values out. The strongest winds will be Fremont Canyon in the Orange County area, Chaffey College area north of Ontario, and the Tujunga/Sunland areas. These zones will have damage possible … Flights in and out of Burbank and Ontario may be delayed and/or diverted on landing to other nearby airports so plan accordingly.
After this we focus on January 2019. As stated many times.. I am going for a stormy month. I am monitoring the first system hitting at the end of the first week and beginning of the second week of the month. This is considered yet another Martin Storm Pattern. You can hover or click the underlined links in this article to see what the terms mean as I set some to show it without typing it, such as Martin Storm Pattern.
The January 2019 forecast will be out before the New Year so keep an eye out for it.
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