Related Clues:

• Vane letters
• Wind dir
• Wind dir., maybe
• Nautical heading, briefly
• Houston-to-Charleston dir.
• ''Acetyl'' ending
• Reverse of WSW
• 180 deg. from WSW
• Storm heading, perh.
• Butyl ending
• NYC-to-The Hamptons dir.
• Suffix with ''prop''
• Grand Rapids-to-Saginaw dir.
• Baltimore-to-Philadelphia dir.
• WSW antipode