Possible Clues:

• Richmond-to-D.C. direction
• Richmond-to-D.C. dir.
• Storm direction: Abbr
• Not quite straight up, briefly
• San Jose-to-Sacramento dir
• Hanoi-to-Beijing dir
• Spokane-to-Edmonton dir
• 22.5 deg. on the compass
• Houston-to-Chicago dir
• It's opposite SSW