Heard on the radio this morning that it was a Na###o that was flying from Penticton to Springbank.
Discussion over at Avcanada has it as a survey flight, this is most likely the plane on Flightaware:
https://flightaware.com/live/flight/CFNCI
The last return on Flightaware (which may not always be accurate) was an altitude of 12,600' and a vertical speed of -3,529 ft/min.