First, to repeat: the Mount Baker-Snoqualmie and Olympic National Forests are urging that visitors continue to stay away for the next 2 days because of washouts, flood danger, and uncertainty about road conditions. Mount Rainier National Park is currently closed.
I-90 appears to be open, but US Highway 2 is closed between milepost 41 and 46. US Hwy 12 is closed between milepost 121 and 129. Many other roads are closed or have standing water. I just received an e-mail indicating that officials hope to have the North Cascades Highway reopened by 8 a.m. Wednesday morning. Current info can be found at WSDOT's travel alert website. Current flood updates can be found at KING-5's flooding and weather wire.
Meanwhile, it's nasty out there. Mount Rainier climbing ranger Mike Gauthier reported recent conditions yesterday at Mount Rainier on his blog:
A firsthand account on nwhikers.net indicates that the Mid Fork Snoqualmie River Road has water over the roadway in many places. We'll have to wait to see what the damage to Forest Service roads and trails will be, but my guess is it will be extensive.
Here's a YouTube link to a video taken of the swollen Stilliguamish near Mount Pilchuck. That's a heckuva lot of water.
Photo of flooding on Nisqually River by Mike Gauthier.