Re: iPhone/iPad Weather Apps
We use an iPhone app named Dark Sky. It is not really a forecast site... it detects your location and will give a 1-hour preciptation look-ahead (with animated radar). It is designed for boaters, golfers, etc. to get an idea of what is coming your way within the hour (and to get a sense if weather you may see in the distance will hit or miss you).
We have found it to be highly accurate and useful... very much worth its $3 (I think) price.