Big weather changes are expected to occur beginning today as the cool trough pattern of the past couple days is rapidly replaced by a highly potent ridge of high pressure. The ridge amplification will begin today as a deep trough digs into the northern Gulf of Alaska.
For today’s weather, we will maintain west-northwest winds in the mid-atmosphere with Northcentral Washington temperatures warming anywhere from 7 to 11 degrees vs. yesterday which equates to highs in the upper 80’s to lower 90’s.
On Saturday the mid-atmosphere winds will begin to back slowly to the southwest as the aforementioned Gulf of Alaska low begins to dive further south, amplifying the ridge of high pressure even further. Under sunny skies, Saturdays highs will warm another 5 to 10 degrees with widespread highs in the mid to upper 90’s.
The heat gets turned up even more on Sunday with sunny skies light wind and afternoon high temperatures in the triple digits.
Weather Alert: There is an excessive heat watch in place for all of Central and Eastern Washington from Sunday through Tuesday.
The ridge and south to southwesterly flow of air early next week will continue to bring hot temperatures and dry conditions to the Pacific Northwest. Monday and Tuesday will continue to have temperatures far above normal with reaching values in the upper 90s to lower 100’s both days.
The temperatures look like they will cool slightly mid-week, with a flattening ridge, but still above average in the upper 80s and mid-90s.