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100-degrees possible in Portland Today

A Heat Advisory is in effect through Monday evening for Portland

PORTLAND, Oregon —

Today will be the hottest day of our 3-day heat wave in the metro area. Our forecast high is 100 this afternoon.

A Heat Advisory remains in effect for western Oregon and Washington today.  In Portland, that advisory is in effect through 10 P.M. Monday. We'll take the edge of the high heat tomorrow, but the metro area is still likely to reach the lower 90s on Monday before significant cooling arrives.

The Coast will remain warm to hot, and temperatures in the Cascades will warm into the 80s tomorrow, with freezing levels rising to above 15,000 ft. 

Portland typically hits 90 for the first time around June 19. And the total number of 90-degree days at PDX for any given year is 15. Last year PDX topped that benchmark 24 times. PDX also topped 100 degrees 5 times last summer, tied for the most days at or above 100 on record in one year.

Credit: kgw

A west wind develops Monday, that will begin to take the edge off the high heat west of the Cascades. That relief may work it's way from south to north, through the Willamette Valley.  Locations south of Salem probably avoid 90 on Monday, while Portland likely runs into the lower to middle 90s again.  True relief arrives Tuesday with high temperatures holding in the upper 70s.

The increasing Pacific push of cooler air will bring clouds and a chance of rain to the Oregon Coast and Coast Range Tuesday. The remainder of next week looks very pleasant.

Longer range forecasts don't point to any real hot spells for the first week of July. While it's still a ways out, our Fourth of July holiday appears dry with highs around 80 degrees.  

Chris McGinness
KGW Meteorologist

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