As adjectives, what are the differences among northerly, northern, and north?

[z7655431]

As adjectives, what are the differences among northerly, northern, and north?

We set off in a "northerly/northern/north" direction.
-Which is correct?

the "northerly/northern/north" end of a bridge
-Which is correct?

A "northerly/northern/north" wind was blowing hard last night.
-Which is correct?

 

[bhaisahab]

As adjectives, what are the differences between northerly, northern, and north?

We set off in a "northerly/northern/north" direction.
-Which is correct? northerly

the "northerly/northern/north" end of a bridge
-Which is correct? northern

A "northerly/northern/north" wind was blowing hard last night.
-Which is correct? northerly or north

See above.