Weather 9-3-19

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Most sunny, warm weather is on tap for our Tuesday across Northcentral Washington with afternoon high temperatures today into the upper 80’s. There is an area of low pressure off the Pacific Coast and as it moves through tonight, expect some breezy conditions out of the west 10-15 mph with gusts as high as 26 mph.

Sunny skies as well for Wednesday along with light winds, highs tomorrow will also top out in the upper 80’s.

Expect a dry and warm day on Thursday under a ridge of high pressure aloft with a surface thermal trough over the Columbia Basin. Above normal temperatures will continue with Thursday`s highs in the upper 80s to lower 90s over much of Northcentral Washington with plenty of sunshine. This may be one of the last uncomfortably warm days of the summer before a more progressive and normal September weather pattern develops over the region.

By Thursday night the warm late summer ridge pattern will break down as a trough of low pressure migrates through the Pacific Northwest. Under partly cloudy skies, the Wenatchee Valley has a 30-% chance of scattered showers and thunderstorms Thursday night and a 20% chance of showers Friday morning.

By the weekend, the upper flow, which is mostly westerly, will gradually back in from the southwest as the upper ridge axis over Eastern Washington shifts east into the Northern Rockies ahead of another weather system that advances east into the Pacific Northwest. We will see partly cloudy skies on Saturday with afternoon high temperatures in the mid 80’s. Mostly sunny skies in the morning on Sunday with increasing clouds by afternoon, highs in the lower 80’s.

Big weather changes by Monday as a broad, slightly negative tilted open low pressure system advances east across the Pacific Northwest. This system will bring much cooler temperatures with highs Monday only in the mid 70’s and a 40% chance of showers by afternoon.