Smoke aloft from California wildfires will begin to move out of Western Washington through the weekend. Shifting winds on Sunday will remove the smoke.
Let's take a look at the HRRR Smoke model, showing the vertically integrated smoke at 9 PM Friday.
Here is 11 AM Saturday.
Here's a look ahead 24 more hours...to 11 AM Sunday.
Upper level winds from the west will push smoke away from Western Washington, hopefully leaving us smoke-free! Any lingering smoke will likely not have an impact on local air quality.
However...a temperature inversion, or trapping of air close to the surface due to an inversion layer, has caused air quality to degrade into the moderate category. Here is Puyallup's 8 PM Friday AQI reading.
This air quality level is not expected to get worse, but expect "moderate" air quality for the weekend.
On to another subject...fog. This time of year is "fog season" in the Pacific Northwest. This is because of moisture in the air and cool temperatures. This graphic (found here) shows how fog commonly forms.
Lots of dew is also present in fall...because of moisture in the air that causes us to reach the dewpoint, or temperature where dew forms. You can find dew on the grass, plants, and the way-too-many spider webs around our area.
Friday morning featured a somewhat rare Dense Fog Advisory in the Puget Sound area. Visibility was 1/4 mile or less, causing delays and diversions at SeaTac Airport.
Expect areas of fog and potentially dense fog for the next few mornings.
Temperatures are cooling down as well. Friday was a warm day, with widespread highs in the 70s. Here is the 10 day forecast for Puyallup from weather.com.
Expect highs 65-73 degrees for the next week, then even more cooling by the end of next week, when rain comes back into the forecast.
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