The Weather Channel for Weather
The Weather Channel’s free iPhone/iPod touch and iPad apps are among my favorites for several reasons. One particularly useful feature for travelers is the "Airport Conditions" screen, which displays current weather conditions at airports and their associated impact, if any, on arrivals and departures. The app also provides a 10-day forecast, pollen index and a "social" weather feature that provides information on weather conditions as noted by other app users. You can receive push alerts for severe weather forecasts, too. The app is free, but it includes ads in multiple spots.