A trough of low pressure is approaching the West Coast today, and our quiet weekend weather will be replaced by much more active weather for the first half of this week. Rain, snow, and isolated thunderstorms will be possible at times. The trough of low pressure over the eastern Pacific is sending high clouds our way this evening, and we can expect increasing clouds tonight and early Monday. Isolated morning showers are possible. Lows will range from the 20s in the mountains to the 30s and 40s in the valley and foothills. Monday will have variable clouds with valley rain, mountain snow, and isolated thunderstorms possible. Highs will cool for all areas, ranging from the 30s and 40s in the mountains to the 50s in the valley and foothills.
Winter Weather Advisories have been issued from Monday through early Wednesday for the mountains of Trinity and Shasta counties. Please drive carefully, as some areas could receive between 6 and 15 inches of snow. This trough of low pressure has 3 disturbances rotating around it. The first bringing rain and snow Monday. The second and third will bring more valley rain, mountain snow and isolated valley thunderstorm chances return both Tuesday and Wednesday, however the third won't hit us directly. We'll have more sun and warmth Thursday and Friday before our clouds increase again next weekend. Highs will rise back above average for the second half of our forecast. Don't forget to spring forward Saturday night, too!