wu might be sharing underlying forecast tech with weather.com . IntelliCast extended forecast continues to include snowfall. NWS tends to be closer on point forecasts, but only hazards guesses (... errr forecasts) about a week out.
Kind of tough to reco any of IntelliCast, weather.com, or wu, since the avalanche of ads can noticeably slow some computers -- often keep these forecast sources inactive (back away from in a tab, or just use bookmarks).