Storm Shield is a detail-rich app for weather bugs, with an emphasis on smart, active, automatic alerts for severe weather bearing down on your location.
This app is likely at its best in situations we couldn't easily test: Storm Shield is plugged into a constant stream of live data, and you can set the app to send iOS notifications to warn about impending adverse weather events at your precise location (as long as you're located where you have Wi-Fi or cell service). You can also monitor up to five locations, which you can specify in your settings. Storm Shield is almost ridiculously detailed in the specificity of its warning settings, allowing you to choose which types of alerts you will receive, with options for statements, watches, advisories, and warnings for everything from tornadoes and blizzards to flash floods, tsunamis, and ashfall. You can even enable notifications for things like excessive heat, air stagnation, fire weather, and high surf.
This passive protection against meteorological mayhem is no doubt Storm Shield's biggest strength, but you can also keep up with automated five-day audio forecasts (with specifics such as dew point, wind speed, and barometric pressure); text outlooks from the National Weather Services' Storm Prediction Center in Norman, Okla.; (you can tab through one, two, and three days out); and the impressively detailed iMap Radar map, which lets you watch live visual updates on all kinds of weather, with overlays you can toggle for floods, snow, hurricane tracks, and more.
Like a hand-crank emergency radio, this is an app you hope you don't have to use -- but if you live in an area with even semifrequent dangerous weather events, its ability to pinpoint data to your location could literally be a life-saver.