Our weather for today through Sunday calls for a highly amplified upper level ridge, with it’s axis over Idaho bring us dry, quiet conditions for the weekend. However, areas of fog, occasionally dense and freezing to surfaces, will be common especially in the overnight and morning hours with extensive areas of low clouds during the daytime. Higher elevations including ski areas will probably bask in weak January sunshine during the days above the inversion layer. Today we will see patchy morning fog with cloudy skies and afternoon high temperatures warmer, into the upper 30’s.
The same weather pattern is on tap for the weekend with patchy morning fog each day, mostly cloudy skies and highs in the upper 30’s to lower 40’s on Saturday and Sunday.
For Monday and Tuesday, the strong area of high pressure will remain over the region continuing to support a dry forecast however; we will see subtle changes in the pattern aloft by Tuesday night. A cool-down is also expected on Monday and Tuesday under mostly cloudy skies we will see highs only in the lower 30’s.
On Wednesday and Thursday, an active Pacific jet will send several shortwave weather systems into the Pacific Northwest and confidence is increasing for another wet and unsettled weather pattern. The first wave of moisture arrives around Wednesday and will likely be very weak with most of its energy absorbed into the ridge. This first wave should largely result in sprinkles or very light precipitation which could fall as a combination of snow or light wintry mix. There is a 20% chance of rain/snow on Wednesday with highs in the mid 30’s. A second, wetter and more dynamic system arrives around Thursday and will be accompanied by a deeper slug of moisture. This will bring a potential for light to moderate precipitation between a tenth to half an inch. There is a 40% chance of a wintry mix Thursday with afternoon highs in the mid 30’s.