Winter storm “Dylan” — a name that the National Weather Service will not acknowledge — is wreaking havoc on flights around the Rockies. Meanwhile, Winter Storm Warnings have been issued for the Northeast.As of 5:15pm Mountain Time on Thursday, FlightAware’s delay and cancellation tracker counted 698 delays — but just 9 cancellations — of Denver (DEN) flights. FlightAware’s Misery Map shows nearly half of current flights are delayed, with flights between DEN and Atlanta (ATL), Chicago (ORD) and Salt Lake City (SLC) being affected the most:This storm has already dumped an incredible amount of snow in isolated areas. In Montana’s Glacier National Park, the National Weather Service has recorded up to 40 inches. And snow is forecast to continue to fall in the western US. Here are the places that you can expect a White Christmas:Image courtesy of Weather Underground.This same storm is supposed to move eastward into the Central Plains and into the Midwest by Sunday, creating hazardous conditions for those driving home for the holidays.While that storm is tracking across the US, the Northeast will be dealing with another system. 8-12 inches of snow are forecast for parts of upstate New York, Vermont, New Hampshire and into Maine.Image courtesy of Weather Underground.We can expect these storms to continue to cause flight delays and cancellations. However, as of publishing, no airlines have issues weather waivers to allow free flight changes. Stay tuned to The Points Guy for alerts if/when airlines announce these waivers.Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.