A winter weather advisory has been issued for all counties across the area. For Jackson & Josephine Counties this is above 2,500′ & for Siskiyou County above 3,000.’ Today a storm system will bring rain & snow to the region. Already this morning snow has been falling across the Rogue Valley, even in Medford. Temperatures are cold enough & snow levels low enough to support frozen precipitation across West Side Valleys and the passes. If you are traveling through the I-5 passes today, be prepared for winter weather. Siskyou Summit has a light dusting currently and roads will be slick for all areas experiencing any type of precipitation, whether it be frozen or not.
In terms of snow accumulations — The foothills and elevations above 2,500′ in Jackson, Josephine & Douglas Counties are expected to see 3″-6″ of snow today, below that a trace to 1.” In Siskiyou County above 3,000,’ 2″-5″ of snow is anticipated, below that a trace to 1.” For the Klamath Basin today through tonight a trace to 5″ of snow is expected. In the Cascades 5″-10″ of snow is expected.
Showers today will turn over to rain for the lowest elevations as temperatures gradually warm. Elsewhere though, it will remain snow. The winds will stay breezy through the afternoon and showers should become more widespread into midday and the afternoon, before winding down some overnight.
Another storm is already on our doorstep tonight when a winter storm watch will then go into effect for all counties. This is for another potent wave, or front, that will move into the area tomorrow. Snow levels are going to remain low and temperatures cold in the overnight/morning hours. Again, that chance for frozen precipitation (rain/snow mix or just snow) across West Side Valleys and Siskiyou County is there again tomorrow morning.
Throughout the day snow levels will gradually begin to rise. Even so, an additional 4″-8″ can be expected above 2,500″ for Jackson & Josephine Counties Friday morning through Friday evening. In the Cascades, an additional 6″-12″ is likely. For Siskiyou County above 3,000′ tomorrow an additional 5″-10″ and for the Basin 4″-8″ is likely.
By Friday afternoon, snow levels will begin rising and this will continue through Friday evening and Saturday. By Saturday afternoon, they will be above pass levels at which point moderate to heavy rain is expected at times for West Side Valleys. Between 1″ & 3″ of rain will fall through the next 72 hours up and down the Coastline.
This active weather pattern will be ongoing through the weekend, with several storm systems bringing precipitation and increasing winds to the area. It’s important to understand that these are potential accumulation totals and that updates will be made to account for current conditions and storm track/intensity changes. This is a forecast and weather conditions are subject to changing as new computer runs come out, especially concerning the next 24-48 hours, especially given the computer models’ difficulty handling this time period throughout the past week.
Keep it here with the Stormwatch 12 weather team to bring you the latest updates with your forecast.
Meteorologist Alyssa Caroprese