Just spoke w/ some folks related to those searching, and there is a full search on.
Sounds like Lynn, Chad & Tim are not the ones missing.
Provisional info here, 3rd party - so keep in mind things may change.
The folks that are lost are from Ft. Collins - a father & sons, and are experienced riders. (names purposely withheld)
It sounds like the heli has been possibly able to locate them, but couldn't get to them due to terrain/wind/light challenges.
Not sure if this is a stuckfest, injury, or avalanche related yet.
It didn't sound like contact had yet been established. (this may have changed as the report was delayed a bit)
Search crews are very motivated, including some very accomplished riders.
Let's hope for a positive outcome for all!!
MD.