This weather app is able to warn you against rain or snow by alarms. Available for the Web, iPhone / iPod / iPad, Android, Windows 8.
The data used originates from governmental weather services. Works in the USA (including Alaska, Hawaii, Puerto Rico, Guam), Canada, Australia, Taiwan, Malaysia, Singapore, Brunei, the UK, Ireland, Germany, Norway, Iceland, the Netherlands, Spain (including the Balearic and the Canary Islands), Slovenia, Croatia.
A.k.a. Regen-Alarm, Alarma de Lluvia