The monsoon trough has redeveloped over northern Australia this week, bringing Darwin its heaviest rain five years. The trough and an embedded tropical low are producing heavy rain and squally storms across the Territory's Top End this week. Darwin received its best wet season soaking since 2012 last night, with 144mm accumulating in the city's rain gauge during the 24 hours to 9am today. Other notable totals up to 9am included 179mm at Charles Point, their heaviest in two years and 275mm at Labelle, their heaviest rain in at least three years. More heavy falls and squally storms are likely tonight and on Wednesday as the low moves towards the west, across the base of the Top End. A severe weather warning is in place for damaging winds and heavy rain for today and tomorrow, along with a flood watch for Northwest Coastal Rivers. The low should move into the Kimberley on Thursday allowing conditions to ease, although flooding may linger into the end of the week. Further south, a separate trough is causing showers and storms that could bring flooding to parts of the Lasseter, Simpson and southern Tanami districts this afternoon and evening.