Weather 9-28-20

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The upper-level weather pattern over North America will become increasingly amplified Through this week as a large trough of low pressure carves deeply into the eastern U.S., a high amplitude high pressure ridge will become anchored over the West. Afternoon temperatures will climb into the 70s across the majority of Northcentral Washington today under mostly sunny skies.

Under sunny skies, Tuesday and Wednesday will be warmer with highs in the mid-70’s to low 80’s, which is about 10 degrees warmer than normal for this time of year.

No significant change in our weather pattern as we head to Thursday and into the weekend. With lots of sunshine, daytime high temperatures will be 10-15 degrees above normal for this time of year with highs in the upper 70s to mid-80s for the Columbia Basin and Wenatchee Valley.

Also, we will have to monitor the building mass of wildfire smoke off of the northern California coast. Critical fire conditions Sunday evening has led to explosive activity which will likely continue into the day Monday. The previous smoke model runs that did not account for the renewed activity is now bringing smoke around the western periphery of the ridge into the Inland Northwest Wednesday or Thursday. This is still a big unknown but there are increased odds we will see some smoke around Northcentral Washington by the end of the week. It is too early to determine if there will be any significant impacts to air quality but something to continue to watch closely.