This weekend will be the warmest time of the year so far in the Pacific Northwest, and my podcast provides the insight.
But I don’t stop with the forecast: in my second segment, I tell you how difficult it is to have a heatwave in western Oregon and Washington because of the cool Pacific Ocean and specific conditions. needed to push us into warm territory.
The key feature driving warmth over the weekend is a high pressure peak in the upper floors that will develop over us on Saturday and Sunday (see upper level … pressure 500 hPa … about 18,000 ft. … at 5 p.m. Sunday)
At the surface, this combined with high inland pressure creates an easterly (outward direction) current that pushes the cool oceanic influence out to sea. This is shown by surface map at 5 p.m. Saturday, with color showing temperature and pressure using solid lines.
The latest projections of surface temperatures suggest warming.
5 p.m. Saturday: Temperatures in the 80s and above found in the Columbia River Basin, southwest Washington, and in Puget Sound.
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It was even warmer on Sunday, with the 90s (pink) spreading from the Willamette Valley to SW Washington as well as in the Columbia River Basin.
Monday’s 5 p.m. temperatures show big swings. Very hot in the Columbia Valley (over 100 degrees F) and cold deep along the immediate coast. Sea air is moving again! Probably the warmest day north of Puget Sound.
And Tuesday afternoon will be a lot colder in the west. OH. You may need a sweater!
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Notification
I will give a talk on Northwest Weather and sign copies of my updated book (Pacific Northwest Weather) at Northgate (Seattle) Barnes and Noble at 1 p.m. on Saturday, June 25.
