Today was a scorcher as expected, although temperatures were a notch or two below the forecast high here in Portland
Other parts of the state were incredibly hot
That Medford high and forecast for tomorrow is just amazing. 114??? Wow.
So how will we end up 5-8 degrees warmer tomorrow here in the Willamette Valley? It’s all about the wind direction. Today we had weak onshore flow and light westerly flow through the Gorge. Overnight and tomorrow the hot thermal trough of low pressure shifts west of the Cascades. That produces light easterly flow through the Gorge and over the Cascades. Add that to a slightly warmer airmass and it’s going to be a blazing hot day Wednesday…the hottest in 8 years for many of us. We’re forecasting 105 in Portland, although there is one thing that could drop that temp a few degrees…smoke.
Take a look at the GOES-16 image of smoke surging south from British Columbia wildfires this evening
Soon after 7pm, air quality took a huge tumble in the metro area. As of 11pm it’s considered UNHEALTHY in Portland. IF that smoke thickens much more, that will cut down on energy coming from the sun and our temperatures won’t rise as much as expected tomorrow…we could end up at 101 or 102 instead of that 105. Regardless, it’s going to be a hazy and hot day around here.
Chief Meteorologist Mark Nelsen