The Steam Packet says bad weather tomorrow has put two more sailings at risk of disruption.
Today's sailings were all cancelled in the face of Storm Agnes, although the 2.15am Heysham to Douglas sailing with the Manxman is going ahead as planned.
However, Thursday's 2pm Douglas to Liverpool and 7.15pm return trip may be called off with more poor weather forecast.
A decision is expected to be made by midday tomorrow.
High ground could see 4 inches of snow on Saturday night
Mountain Road unlikely to open before Monday
Yellow warning for freezing temperatures tonight
School bangers night called off
AK47 and Uzi handed in to police
"No dispute" over Liverpool Ferry Terminal, says main contractor
More weekend bus strikes to come after 10-day walkout?
Minister to face question about bus strike