Weather 5-27-20


Two upper level air circulations of note on the Pacific satellite loop this morning. One feature is a closed low pressure system in the Gulf of Alaska which will be the main influencing player in our regional weather for the next couple days and another cut-off upper low off of Baja California which will eventually aid in a big change for this weekend. Overall the main weather story will be soaring temperatures, with a general increase of 5 to 7 degrees over Northcentral Washington each day culminating in widespread valley and basin mid 80’s to lower 90’s by Friday.

Today we can expect sunny skies light northwest wind and afternoon highs in the mid to upper 80’s.

Warmer for Thursday too with mostly sunny skies, light wind and afternoon high temperatures in the upper 80’s to lower 90’s.

Our warmest day of the weather forecast is Friday where the Columbia Basin and Wenatchee Valley could see record high temperatures into the mid and upper 90’s.

A well-advertised weather pattern change is on the way for this weekend. The mini heat wave late this week spills into Saturday as an amplified ridge of high pressure remains parked over the Inland Northwest. A mini weather system in the flow aloft, off the coast of California is expected to break down the ridge late Saturday into Saturday night with a band of thunderstorms ahead of a cold front, which will sweep the Inland Northwest followed by brisk westerly winds. Instability will be on the rise, peaking Saturday afternoon and Evening. The Wenatchee Valley can expect increasing clouds on Saturday with a 40% chance of daytime showers or thunderstorms increasing to a 70 % chance of rain Saturday night, still hot with afternoon highs in the lower 90’s. Possible thunderstorm impacts range from hail and damaging winds, along with heavy down pours and the potential of flash flooding.

There is a 40% chance of lingering showers Sunday morning as the storm system pulls away from our area with clearing skies by afternoon cooler too with highs on Sunday back down into the mid 70’s.

Mostly sunny skies on Monday and Tuesday and high pressure builds back in with high temperatures in the upper 70’s on Monday and lower 80’s by Tuesday.