1.   A large dip in the jet stream will help intensify low pressure developing over the upper Middle West on Thursday.

2.   A large dip in the jet stream will promote cool, unsettled weather across much of the West Friday.

3.   A large dip in the jet stream will prompt unsettled conditions over much of the Northwest.

4.   It will be unsettled over much of the Northeast again on Wednesday, as a large dip in the jet stream persists.

5.   This unusual occurrence was the result of a large dip in the jet stream bringing chilly air far into the Southeast.