This is a good time to charge up your electric car...particularly during the evenings.
Unusually cool weather is forecast for the next few days in western Washington and Oregon. Seattle will be firmly into cool, marine air the next few days, with highs only reaching the LOWER 60s.
In contrast, it will remain warm over the Columbia Basin, with 80s for the first part of the week, climbing into the 90s by week's end.
This pattern is very favorable for producing healthy westerly winds along the eastern slopes of the Cascades and across the wind farms east of the Cascade crest.
The sea level pressure (solid lines), surface winds, and low-level temperature (colors) forecast for 2 PM Tuesday (below) show the story. High pressure and cool temperatures (green) offshore, warmer temperatures (orange and red colors) east of the Cascade Crest. You will notice a large pressure difference across the Cascades, which will produce strong winds over the east of the barrier.
A similar, but attenuated, version of this situation was in place today (Monday) and winds were gusting to 30-40 mph around Ellenburg and other eastern slope locations (see max gusts on Monday below).
Even stronger winds will occur on Tuesday and Wednesday. The result will be lots of wind energy generation. The Bonneville Power summary shows increasing wind generation the past few days (green line)...getting to roughly one-third of demand (red line). Will do even better tomorrow and Wednesday.