The pattern remains to call for systems to come into California, with one at the end of the week being a northern slider and the better precipitation producer next week. Cold air is coming back for winter to regain control so read on for details.
It has been warmer than normal lately, however come the end of the week it’ll cool-down to winter normals so don’t put away those winter coats yet. If you have plants or trees, this will help you plan. A northern slider looks to hit sometime at the end of the week, probably being Friday. A northern slider is a trough that comes over us and to the north. Such systems usually bring in stronger onshore flow for gusty winds in all sectors of the forecast area. West winds with these systems usually bring 30+ mph winds along the coast and somewhat inland, all of the mountains, and all of the desert areas.
Systems like this also bring more precipitation to the San Luis Obispo and Kern County areas, with the most falling in the Kern County Mountains and along the southern foothills of the Los Angeles, San Bernardino Mountains, including the Western slopes of the Riverside and San Diego Mountains.
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Systems like this produce very little rainfall for the mudslide risk zones. Snow levels with this one will drop through the 4,000 FT level in the Kern Mountains on Friday night, with the level down the same for the Riverside/San Diego Mountains. Although Kern has the best chance at holding onto snow then, a dusting with residual showers is possible for the SD/RIV Mountains at this time.
The next system looks stronger, which happens next week. My models are all over the place with the strength of it, with a push-back in some values in the flood zones at 25% from 50%. However, will remain to monitor the longer range pattern as it still looks like a system will hit next week and even so things can change once again.
The cold air will start on Friday night after the cold front hits, with Saturday likely being colder under the drier air in the area along with the cold airmass.
January 2018 official forecast I released for this month stated that we still would be below average in precipitation in Downtown Los Angeles this month, with 1-3″ of rainfall. So far that is in the middle and after all is said and done it likely will be the upper end of it, but still below average. Click to read that article –
If you have plans this coming weekend, keep them … it’ll be nice and cool out there, otherwise no storm problems in-between systems.
Given this, frost in the inland areas is likely and freeze is likely in the High Desert zones so continue to stay tuned to Southern California Weather Force for the latest updates …
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