[KIRKLAND, Wash.] – (MTN) The National Weather Service has issued a Heat Advisory from noon Sunday to 9 PM Monday for Western Washington, with temperatures expected to flirt with the 90-degree mark. Smoke is expected to roll into the region and linger through Tuesday.
Saturday evening will be pleasant with a northwest breeze from 5 to 10 MPH. Temperatures will be perfect for sleeping – 56 to 60 degrees.
Sunny skies with light winds will heat things up with highs reaching 88 to 92 degrees. Temperatures will be cooler by the water and hotter in urban canyons and our area hot spots like Totem Lake and Kingsgate. An onshore flow will develop, pulling smoke over the Cascades. The AQI will be moderately unhealthy, 51 to 100 PM2.5. Very sensitive groups should limit their time outdoors and avoid strenuous activity. Photographers will want to have their cameras ready for a brilliant sunset.
Temperatures will drop to 57 to 61 degrees, and smoke will remain moderately unhealthy, with the AQI between 51 and 100. Smoke tends to be worse at night as cooler air sinks and pulls it closer to the ground.
Monday’s forecast is complex, which makes it tricky. If the smoke becomes denser than current models, it will moderate high temperatures. Cloud cover is expected to move in from a weak disturbance, and that will also impact the high temperature and how much smoke settles in the area. High temperatures will reach 89 to 92 degrees in the Bellevue-Kirkland-Woodinville area, with an AQI of 51 to 100. Clouds aren’t expected to roll in until very late on Tuesday, but if that accelerates, it will moderate temperatures and convert our smoke into smog.
Low temperatures will be 59 to 65 degrees depending on when the clouds arrive and how much smoke is in the area. Expect cooler temperatures if the current weather models hold and warmer temperatures if the area gets blanketed. AQI will remain 51 to 100. By sunrise, winds will shift to an offshore flow, moderating our temperatures and blowing any smoke left out of our region.
Tuesday will be mostly cloudy, with smoke blowing out of the region. Expect the AQI to move back to normal by the afternoon. High temperatures will be 80 to 85 degrees with a southwest wind increasing to 7 to 10 MPH. On Tuesday night, there is a small chance of some rain showers moving through the area, cleaning the air out and moderating temperatures back into the 70s for Wednesday.
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