Today was the beginning of our heat wave, but at least it was just a “regular” hot day. Temperatures moved into the lower 90s in the Willamette Valley:
Forecast-wise nothing has changed the past 24 hours. In fact our 7 Day forecast looks just the same as it did 24 hours ago for the next 3 days.
One change is temperatures remaining near/above 90 degrees through the weekend. Models are much slower weakening the upper-level ridge hanging along the coastline this week. As a result the cooler marine air will only slowly leak into the western valleys of Oregon and Washington. This means we are in a stretch of as many as 8 days at/above 90.
Here is our current forecast vs. records for each of the next 3 days. The record highs for the first few days of August are pretty low hanging fruit as they say. Easy records to break!
By the way, here is a list of Portland’s 5 hottest days, notice we’ll have to get to 106 to make it into that list.
So hang on, we’re in for a hot ride tomorrow. Models are in good agreement giving us 5-9 degrees of warming, which should put us into the upper 90s by 5-6pm.
One other note; there is quite a bit of smoke to our south and north plus northeast from fires in the region.
At this moment I don’t expect enough smoke over NW Oregon to have an effect on high temperatures. But even just a thin veil of smoke any of the next 3 days COULD be enough to keep temperatures 1-2 degrees lower than forecast. We’ll be watching that closely.
Chief Meteorologist Mark Nelsen