After a string of long intervals, Grand had some shorter ones. The first was during the foggy dawn, and I was just getting ready to head out when it started. The next was midday.
Spent an hour down at Fan & Mortar because there wasn't much else to do. If there is any cycling, it's so short as to be wishful thinking by the observer. Also checked out Daisy, which had an interval of 110 minutes.
So of course the next Grand interval was longer. No Turban delay intervals while I waited, just a nearly eight hour Grand interval that seemed to be waiting for West Triplet to get ready. Eight Turban eruption intervals all about 18 minutes long with a 3-1/2m duration eruption. The Turban eruption after sunset, Grand erupted followed almost immediately by West Triplet.
It also seemed to be "take your dog through the basin" day. I counted at least five around Castle and Grand during the day.