***COLD WITH VERY LOW SNOW LEVELS SUNDAY THROUGH TUESDAY***
Normal high and low temperatures for Dec 26-Jan 2 (high/low)...Redding 52/35, Chico 53/35, Quincy 44/23, Chester 40/20, Susanville 40/21, Grass Valley 51/31, Weaverville 45/29, Mt. Shasta 41/24, Yreka 43/25, Alturas 41/16
This blog will be issued every Monday morning and updated if the weather is changing or critical or interesting weather events are occurring.
Because of the incoming storms I will update this blog daily at least through midweek.
A relatively dry but cold low pressure area moved through the area last night and can be seen on this morning's satellite picture (below) just off the Central California coast. Sunny skies today with cold temperatures tonight in the wind sheltered areas.
Sunday the next cold low pressure area drops southward along the Canadian Coast. This system will "hook" or move back to the west as it reaches the Northern California Coast. This will allow it to pickup more moisture. Clouds will increase Sunday afternoon with light precipitation starting late Sunday afternoon. Snow levels will be 500 feet in the north and 1500 feet in the south (Butte co.)
After Sunday all of the forecast models have changed. Instead of the low moving through it now remains off the Northern California Coast. Out to the west in the Pacific the jetstream splits and the southern branch picks up moisture from the large low pressure area shown on this morning's satellite picture in the Central Pacific. This develops a weather pattern not seen too often in our area. (see map below). The low pressure area keeps the cold air over our area and southern branch of the jetstream pushes moisture into it.
Monday we will see light snow or snow showers with snow levels continuing near 500 feet north and 1500 feet south. Monday night and Tuesday the first surge of moisture from the west hits. I think due to the cold air being trapped in the north valley the snow levels will continue near 500 feet from Redding northward. Snow levels will rise to 2000 to 3000 feet to the south. Moderate to heavy precipitation is expected.
More moderate to heavy precipitation is expected Wednesday. Snow levels will rise in the north to 1500 to 2000 feet. Skies will clearing Thursday with a warmer storm due in on the weekend.
The Old Forecaster