Grab your umbrella, and brace for travel impacts! Very wet and windy weather is ahead for the next few days across Northern California. An Atmospheric River event is expected to arrive today, and bring several inches of rain to Northern California through Thursday morning. I'm already tracking showers across Northern California for the start of your Monday, and heavier rain and snow will be arriving this afternoon. Snow levels are rising from 3000' to 4000' this morning, and will continue to climb over the next few days. Temperatures are in the high 40's in the valley, and in the 30's in the mountains for the start of your Monday. A Winter Storm Warning is going into effect for the Sierra and Southern Cascades at noon today, and will stay in place through 6am Thursday. A Wind Advisory is going into effect at 7am this morning, and will last through noon on Wednesday. Winds will be up to 30mph out of the South today, with gusts up to 50mph. A Flood Watch and Flash Flood Watch will both go into effect for the valley and foothills this evening, and will stay in place through Thursday morning. Rain and snow will become heavier and more widespread this afternoon. Temperatures will top out in the low to mid 50's in the valley today and in the mid 30's to low 40's in the mountains this afternoon.
Snow levels will be on the rise over the next couple of days, with levels expected to rise above 6000' on Tuesday night. Up to 8 feet of snow will be possible in the mountains, and that will make travel treacherous. Heavy rain will likely lead to small creeks and rivers overflowing over the next few days, and there is potential for flash flooding around recent burn scars. Up to 6 iches of rain looks likely in areas of the valley through Thursday morning. Temperatures will be warming up in the mid to high 50's in the valley for the middle of the week. South winds will be gusty through Wednesday afternoon. Looks like we can expect a break from the wet weather to return on Thursday and Friday. More active weather will be likely this weekend, but amounts are not expected to be as substantial as what's in store for the start to middle of this week.