Can't vouch for the morning, but Monday afternoon was another suncream and shades one, with mostly blue sky and a few clouds scurrying over from time to time, was noticably hazier to the South of the Plateau and in the distance to the North.
Little change in the Snowsports Area since Saturday, but the snow on Coire Cas was looser today and with a strong tail wind funnelling down over the Headwall it was possible to really crank it up on Coire Cas. M1 RaceTrack has good spring snow and has a good line down through the fences and out via Horizon Road to the 105. M1 SideTrack has sweet almost untouched spring snow, and with a bit of shuffling around the fences you can cut over the Poma uptrack and get to Horizon Road.
For experts though spring snow is at it's best when it's steep, so the run of the day was with out a doubt the Cas Headwall. From the top of the Ptarmigan Tow go skier's left of the Ptarmigan Traverse fence then keep as high a traverse as the snowfields allow, crossing the Summit Path keep as high as possible and follow the line of snow round till it ends.
From here a short hoof (couple of minutes at most )gains that bit of height needed to traverse Coronation Wall till your on the Headwall then drop down and take a line to the Cas Tow. Scope for some longer but narrower lines on Coronation Wall itself. See forum and Backcountry reports for more pix from the Headwall and photo with the route to get there.