Is the modifier in this sentence Approaching quickly from the west the front looked ominous correctly used?

Yes, the modifier "Approaching quickly from the west" is correctly used in the sentence. It provides essential information about the subject "the front," indicating its movement and direction. However, to enhance clarity, it may be beneficial to restructure the sentence to clearly connect the modifier to the noun it describes. For instance, "The front, approaching quickly from the west, looked ominous."