Very heavy rain has fallen over parts of southeast QLD overnight leading to major flooding in some areas. The 24 hour rain totals since 9am on Friday have exceeded 100mm from Tomewin on the Queensland and New South Wales border region through to Boreen Point near Noosa. Noosa Heads has reported one of the higher totals, with 263mm falling from 9am Friday through to 7:30am on Saturday. Cooroy had an absolute torrent of rain with 337mm falling in the same period, which is more than half what the city of Melbourne would typically get in an entire year. Tewantin picked up close to 200mm in the space of just 4 hours between 7pm and 11pm last night, the most in 13 years for February. All suburbs of Brisbane got wet, with scattered falls of 50-100mm. All of this rain has played havoc with some river systems and catchments. As of Saturday morning there has been major flooding in areas near the Sunshine Coast, such as on the Mooloolah River at Jordan Street in Caloundra. The heavy rain has been triggered by a few ingredients conspiring together. An upper level trough moved in from the west, a trough developed on the coast and a moist and strong easterly flow fed in a plentiful supply of moisture. A severe weather warning for heavy rain in southeast Queensland has been cancelled on Saturday morning. The outlook is for showers to continue on the coast, although tending isolated about the Southeast Coast as a ridge of high pressure strengthens in the east. On Sunday, the main area of instability will shift north and take the heaviest rain with it. The bulk of the rain is expected about coastal areas from the Capricornia to the North Topical Coast and Tablelands. Keep checking weatherzone.com.au for the latest warnings and updates.