Water vapor weather imagery shows a well-defined compact area of low pressure off the Oregon coast which will result in warm temperatures peaking in the upper 80s to lower 90s for most towns. The low then tracks across Vancouver Island this evening and then across Southern British Columbia overnight into Tuesday morning. Afternoon highs today should top out in the low 90’s. Weather models have trended towards a sharper weather system with stronger forcing over the area tonight. The main thunderstorm threat with this system will be from the Okanogan Valley south into the Moses Lake area and Upper Columbia Basin. These storms will be moving very quickly towards the northeast at 40-60 mph, which should limit rainfall totals. In the Wenatchee area, only very isolated showers are possible tonight but we will see an increase in wind out of the northwest 15-20 mph.
Along with sunny skies and cooler temperatures behind the weather front, expect windy conditions on Tuesday as well, northwest 10-20 mph with high temperatures in the low 80’s. Weather models are in decent agreement in maintaining a generally westerly flow through Friday for the remainder of our workweek.
We will see a strong area of high pressure settle in on Wednesday with afternoon high temperatures in the 90’s through the weekend with our warmest day on Thursday with highs in the upper 90’s. So, at this time this weekend looks like a dry and typically warm and sunny early-summer pattern.