Ranking - Weather (iPhone)
TyphoonInfo by MilkNoPapa
Red Circle:violent wind over 25m/s
Yellow Circle:strong wind over 15m/s
It can display distance from typhoon center to your location if your iPhone can supply location information.
It can also display forecast produced by JTWC(www.usno.navy.mil/JTWC/),cloud pictures obtained by satellite,and radar echo around Japan.