The Maritime polar forms over oceans and are humid
It forms over the northern Atlantic and northern Pacific oceans.
humid
it is the continental tropical (cT)
An air mass that forms over water at high latitude is most likely cold. The air mass over the water would also be quite humid.
Cold and Humid
An air mass that forms over the Gulf of Mexico will be extremely warm and humid. This could bring the potential for heavy rains over Texas, especially inland. Otherwise, it will simply be very muggy, and unseasonably warm and humid.
A continental polar air mass forms over land in northern Canada. A continental polar air mass forms inland from the oceans of Northern Russia, Siberia and Northern Canada.
A continental polar air mass forms over land in northern Canada. A continental polar air mass forms inland from the oceans of Northern Russia, Siberia and Northern Canada.
The amount of moisture in it, which is determined by the environment over which the air mass forms and then passes.
An air mass that forms over water at a high latitude is most likely cold and humid. It would be cold because the higher the latitude the colder the air.
Air masses with those characteristics are termed "maritime tropical".