In the Forecast Ticker Bar at the top of the screen you should see the estimated weather for the day as well as an outline of a star. Tapping this star when the cross-hairs are centered over a city or town, will "Favorite" this location for future reference. When you have multiple cities favorited a quick left to right swipe motion in the Forecast Ticker Bar will auto-locate the next favorite on the map. Just tap the gold star in the ticker bar again to make it disappear from the map!