A broad upper level trough will remain over the Inland NW today while a weak shortwave in the flow brushes across northeast Washington into north Idaho this afternoon. Satellite shows high clouds increasing east of the Cascades which should persist through the morning hours. Gap winds have persisted overnight in the lee of the Cascades and expect gusty westerly winds to return this afternoon in the post frontal environment, mainly in the Columbia Basin and Eastern Washington. Gusts should be less than experienced yesterday, although speeds of 20 to 25 mph will peak in the Cascade valleys into the western Columbia Basin late this afternoon and early evening. The most noticeable weather element today will be temperatures much more seasonable, about 5-7 degrees cooler than yesterday. Northcentral Washington forecast for today calling for sunny skies and a northwest breeze 10-15 mph with afternoon high temperatures in the mid to upper 80’s.
On Saturday, the broad upper trough migrates east, leaving a dry northwest flow aloft over the region. At the same time, surface high pressure will nose into the region, giving way to lighter winds. Temperatures will also warm a few degrees each day through the weekend. Columbia Basin and Wenatchee Valley weather for Saturday and Sunday expect sunny skies each day light winds and afternoon high temperatures Saturday in the lower 90’s warming to the mid 90’s by Sunday.
The heat is on for next week. High pressure over the Eastern Pacific will strengthen and build north and east. This will shift the cooling effects of the jet stream up into Canada, allowing the Inland Northwest to bake a bit with temperatures in the upper 90’s for most everyone on Monday and triple digit temperatures are possible by Tuesday.
More heat for Wednesday too with sunny skies highs once again will climb into the upper 90’s to near 100 degrees.
Thursday, the westerly breezes over the Cascades will start to slightly cool off Wenatchee and the Western Basin with afternoon high temperatures, still hot, into the mid 90’s.