Arrived at Norris at dawn, not really expecting much until the afternoon. Turned out to be late afternoon, with over a period of 20 minutes there being three significant attempts at erupting starting around 16:27. There was a second, even better period starting just about the time to leave, with three more attempts in a period of six minutes starting at 20:13. Then nothing as it got dark.
It was hard to tell the smoke from the clouds during the day, although by evening there was some patchy blueness to it. Back at Old Faithful, the smoke could be seen as fogginess and was definitely a smell in the air.