Very comfortable weather will prevail today as a trough of low pressure remains off the Washington coast, keeping temperatures slightly below normal into the weekend. This trough is expected to dig slightly southward, which would keep most of the mid-level moisture over the Cascades and drier air pushing into Central Washington. We can expect a few degrees of warming east of the Cascades today, with high temperatures topping out in the upper 60s to lower 70s. Low-level southerly winds will increase across central Washington this afternoon, followed by westerly gap winds by this evening.
Little change is expected with the upper level trough overnight into Saturday. However, we will see increasing clouds throughout the day on Saturday with the best chance of showers being over the Cascades during the day. We won’t see much change in temperatures on Saturday with light southerly winds we will see highs in the lower 70’s. A cold front will make its way to the Cascades Saturday night bringing with it a 20% chance for early morning showers.
Our best shot for widespread showers for our northern counties will occur on Sunday as the low-pressure trough off shore finally pivots inland. Weather models are in pretty good agreement that the East Slopes of the Cascades, Okanogan Highlands, and mountainous areas of northeast Washington will have a good shot of showers and embedded thunderstorms. We have a 50% chance of rain on Sunday with high temperatures only in the mid to upper 60’s.
On Monday and right through the end of next week, we will see a drier weather pattern with mostly sunny skies and highs in the lower 70’s and lows in the upper 40’s.