South King County gets winds that the north part does not.
Yes, we get our own weather in the north Puget Sound Convergence zone. I went the whole day seeing no other motorcycles/scooters. On the way home, the rain was coming down so hard and the road spray was so thick, I could see the car ahead of me...but not the one ahead of him. I stopped by Costco on the way home (it's amazing to see what can fit under the seat). The checker asked if I felt scared riding out in that weather and I told her no. All the other motorcyclists are off the road. I'm not sure she really understood what I meant.
On the way home, I was riding through deep standing water and the "rain" was coming down white. I suspect we'll get a couple inches tonight.
Here's an example of the Puget Sound Convergence zone. From Green Lake (just above "Seattle") south for quite aways, the rain is virtually non-existant...like where Dave_J lives. I live just to the right of that red area.
The weather comes in from the ocean and is blocked by the Olympic mountains on the peninsula. Like water, the air will flow to the lowest places it can find. One convergence zone is south of Tacoma. The other is up north in the area around Everett. The winds split going around the mountains, then come together again...and it becomes a meteorologist's nightmare.
If there's any motorcyclists out there in that weather, they will generally be riders who know what they are doing. I feel a lot safer meeting up with one of them, than I do the riders who show up on the first sunny and warm day.