Expect more unseasonably mild May weather all this week with above normal temperatures, sunny skies and light wind. Our upper level weather pattern continues to be dictated by a sprawling ridge of high pressure over the Eastern Pacific resulting in a northwest flow aloft across the Inland Northwest. Sunny skies in our Monday forecast with a light northwest breeze afternoon high temperatures will top off in the lower 80’s. A weak shortwave weather system arrives tonight with a band of mid-level clouds brushing across north central Washington.
The overnight cloud deck should help keep low temperatures on the mild side, while daytime temperatures on Tuesday rise another degree or two into the lower and even mid 80’s.
On Wednesday, high pressure dominating the Eastern Pacific ridges across the Pacific Northwest and keeps Northcentral Washington under the influence of a prevailing northerly upper flow through the upcoming weekend.
Mostly sunny to sunny skies for Wednesday and Thursday with a light north breeze and afternoon high temperatures into the mid 80’s. The dry and unseasonably warm weather is expected to persist through the entire weekend as the giant ridge of high pressure migrates eastward.
With sunny skies each day Friday, Saturday and Sunday, we could see possibly record high temperatures into the upper 80’s. A stray 90 degree day could also develop over the lower Columbia Basin around the Tri-Cities and over into Yakima. Our normal high temperatures for this time of year is 68 degrees and the normal low temperature is 46 degrees. Overnight low temperatures by this weekend could also be record setting with temperatures expected to be into the upper 50’s.