It looks like the ice arch in at the southern end of Nares Strait has started to collapse, according to yesterday's satellite image from LANCE-MODIS:
This break-up is occuring 10 days later than last year. Back then it took about two weeks for all of the ice to start moving across the entire strait and transport from the Lincoln Sea to get underway. Looking at the weather forecasts and the fact the ice is blue and breaking up at the other side as well, I don't think it will take much longer. High time too, as Baffin Bay has almost run out of ice.
But if you want to know the real deal about Nares Strait, I urge you to go to the Icy Seas blog. This blog is run by sea-going physical oceanographer Andreas Münchow, who has actually been to Nares Strait and will soon go back there to retrieve all kinds of gadgets full of data on ice thickness, volume flux and what not. He graciously allows me to re-post his latest blog post: