Mostly sunny this morning with clouds increasing this afternoon as the low pressure trough and front off the coast (see satellite picture below) moves eastward. Temperatures today will be about like yesterday and southerly winds will increase this afternoon.
Clouds will increase tonight as the system nears the coast. Monday rain or showers will spread across the north state. Heaviest rainfall will be on the coast and over the coastal mountains but all of the area should see at least light precipitation. Snow levels will be above 6000 feet. Gusty south winds will occur Monday afternoon.
The precipitation will end by Tuesday morning. Tuesday afternoon through the weekend we will be caught between a battle between two opposing forces...the low pressure trough in the Gulf of Alaska and the high pressure ridge just to our east (see map below). This is a really hard weather pattern to forecast more than 48 hours in advance. The jetstream is forecast to be fairly strong and just to our north. If it shifts 200 miles to the north we will see partly to mostly sunny skies. If it shits 200 miles to the south we will be cloudy with rain. At this time I think it will be just to our north and Tuesday through Thursday the north state will be partly cloudy to cloudy near the Oregon border with scattered light showers. The areas to t he south will be partly to mostly sunny with near normal temperatures. Friday and Saturday the jetstream may sink a little further and this would spread the rain and showers over the rest of the north state.
Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff
Monday: Cloudy with light rain or showers. Max temps 64 to 69. South wind 10 to 20 mph.
Monday Night: Cloudy with showers. Min temps 51 to 57. South wind 6 to 14 mph.
Wednesday: Becoming partly cloudy in the afternoon. Max temps 70 to 75. South wind 5 to 15 mph.
Wednesday Night: Scattered clouds. Min temps 52 to 58. Light wind.