Washington state is currently experiencing an early-season flare-up of wildfire activity, particularly in the southeastern and central parts of the state, as well as the Upriver Fire, a fast-moving incident East of Spokane.

A combination of an ongoing statewide drought emergency and critical fire weather—including a strong, dry cold front with high wind gusts—has caused several fires to grow rapidly over the last few days.

The most significant other current active blazes include:

Omak Lake Road Fire: Things are moving fast up there right now. As of this afternoon (Wednesday, June 17), the Omak Lake Road Fire has officially merged with the nearby Kartar Fire, creating a massive blaze that has already burned roughly 6,500 acres on Colville Reservation land.
Tule Fire (Yakima Region): Ignited on June 14 south of Toppenish, this is currently the largest wildfire in the state, having ballooned to approximately 20,665 acres with 0% containment. It is burning primarily in dry grass and brush and has been producing a massive smoke plume that is impacting air quality throughout the Columbia River Gorge.
Juniper Dunes Fire (Franklin County): This fire has burned over 10,577 acres and is 10% contained. It has pushed into the challenging, roadless terrain of the Juniper Dunes Wilderness area, making ground access difficult for crews.
A Red Flag Warning remains in effect across much of Eastern Washington due to sustained high winds and low relative humidity, meaning any ongoing fires face an extreme risk of rapid spread, and new starts can ignite easily.

Is smoke from around the state forecasted to arrive in NCW?

Right now, North Central Washington is in the clear. The active wildfire smoke is staying well away from the Wenatchee Valley and surrounding areas, and local air quality remains firmly in the “Good” category.
The main reason for this breaks down to wind direction and fire locations:
Westerly Winds are Our Friend: Strong winds blowing from the west across the Cascades are actively dispersing air over NCW and pushing regional smoke eastward.

Where the Smoke is Heading Instead:

South: Earlier this week, massive plumes from the Tule Fire down in Yakima drifted west/southwest into the Columbia River Gorge and Portland-Vancouver metro.
East: With the current wind shift, smoke from the large fires in the Columbia Basin (like Tule and Juniper Dunes) is now being carried east toward the Tri-Cities, Walla Walla, and the Palouse.
North/Northeast: Up north, the Kartar and Omak Lake fires east of Omak are causing localized downwind smoke impacts, but the smoke is drifting east toward Nespelem and the Coulee Dam rather than dropping south into Chelan or Douglas counties.
Because these breezy, dry conditions are expected to persist through the rest of the week, weather and air quality officials note that intermittent smoke impacts will mostly be a concern for communities situated directly downwind (east) of the active blazes.

Where can I look online to see where wildfire smoke is coming from?

A few years ago, I discovered a Canadian website that not only shows you where wildfire smoke is coming from, but also how the smoke forecast will affect you in the coming days. It comes from the BC Wildfire Service.
Click on this helpful wildfire smoke map and bookmark it.
A couple of things to know about this BC Wildfire Service website.
1) When you first find the smoke map, select the Smoke Forecast button.

The map will come to life, showing where current wind conditions are directing wildfire smoke and where it is forecast to travel in the coming days.
2) Since it’s a service of the BC Wildfire Service, it doesn’t provide any information on fires here in the US, but it does show where smoke is forecast to come from any wildfires north and south of the border.

Where can I find updated information about wildfires in Washington?

The Watch Duty app for any device.
The Washington DNR fire dashboard is active throughout the fire season and shows up-to-date information on wildfires affecting Washington state.
View a full-screen version of the DNR fire dashboard with this link.