The Department of Infrastructure says the Mountain Road will remain closed for the rest of today.
An emergency road closure means it'll stay shut from the Ramsey Hairpin to the Creg-ny-Baa, and the Tholt Y Will Road will also be closed.
Police shut the route earlier today after snowfall overnight.
The DOI says the road closure will run through until at least midday tomorrow.
Stop putting knives in recycling, says council
Bee Gees to release limited-edition box set
Northern Irish politician criticises Manx visa rules
Elective surgical unit opens at hospital
Piling rig on TT course tonight
10-day bus strike from next weekend
Yellow snow warning issued by forecasters
Ramsey harbour keeper completes 3,000-Mile Atlantic crossing