Ive used xcweather.co.uk for ages, particularly for wind , I've recently started looking at Ventusky, which is pretty , but I find interpreting the colours a bit hit and miss sometimes, but it does seem to give a decent general overview, mostly though, I find the Dark Sky app really accurate for location based forecasts. For example it last night it forecast snow here from 6.00am until 7.30am. Snow started just after 5.30 and stopped a bit after 7.00.