A near-stationary coastal trough over south-east Queensland from 6 February 2020 generated persistent showers and thunderstorms until the middle of the month, with locally heavy falls in some areas.
Heavy rains produced significant flooding in a number of creeks and rivers, including the Logan/Albert, Condamine, Coomera, Noosa and Mary Rivers as well as their tributaries. River level rises in these catchments caused flooding at several townships downstream, including heavily populated areas around Logan City, Warwick, Dalby, Chinchilla, Tewantin and Gympie.
Some of the heaviest rainfall was experienced at Coolangatta, which on Saturday 8 February recorded 201 millimetres (mm) in 24 hours.
The Bureau of Meteorology (the Bureau) reported that severe thunderstorms had also created intense downpours around Warwick, 140 kilometres west of the Gold Coast, with more than 80mm falling in an hour and providing some relief from drought conditions. The town received more than two years of water supply from the downpours, with water flowing into the nearby Leslie Dam.
While several other areas received more than 200mm of rain in the same 24 hours, no records were broken. The Gold Coast and Stradbroke Island were the most affected that day, and the Darling Downs experienced totals exceeding 100mm.
The following day, the Bureau issued a severe storm warning for several parts of south-east Queensland. Later that day, two people had to be rescued from a car in floodwaters at Greenmount, south of Toowoomba, and about ten homes were evacuated in Jondaryan, a few kilometres to the north-west.
The State Emergency Service (SES) received hundreds of requests for assistance (RFAs), most commonly for flood-affected properties and damage to roofs. The busiest LGAs in the south-east were Brisbane (210 RFAs), Gold Coast City (151), Redland City (100), Logan City (96) and Moreton Bay Regional (62). Between Friday night on 7 Feb and the following Monday morning, the Fire and Rescue Service carried out 32 swift-water rescues across the region.
By Monday 10 February, the widespread storms and heavy rain had flooded many parts of south-east Queensland and the Darling Downs. Heavy rain had hit parts of Brisbane (220mm), with numerous cars parked in streets now underwater, and several roads and train lines had been cut by floodwaters. Trains on the Ipswich/Rosewood line were suspended between Wacol and Gailes stations in both directions due to flooding of the rail line. Brisbane suburbs including Pullenvale, Kenmore, Woolloongabba, Moorooka, Holland Park, Tarragindi and Durack all experienced flash flooding.
On 11 February severe flooding affected parts of the Western Downs region, with warnings issued for Dalby where the Myall Creek broke its banks, and for Jandowae and Warra, where the Jandowae Creek overflowed. Myall Creek peaked at 3.2m and caused widespread flooding in Dalby.
Several parts of the Sunshine and Gold Coast areas recorded more than 170mm of rain in 24 hours to 13 February. Marcoola recorded 232mm of rain during this period, Nambour 201mm and Southport 177mm. In both areas, heavy rain continued to fall: in the 24 hours to 9.00am on Thursday, the northern Gold Coast experienced between 100mm-200mm of rainfall. Ten schools and 18 early childhood centres were closed on the Gold Coast on the Thursday, as well as all Gold Coast beaches and most of the region's theme parks. That same day, a nursing home at Mt Coolum on the Sunshine Coast was evacuated due to concerns about flooding.
Sadly, a 75 year-old kayaker was found dead on the Sunshine Coast after going onto the Mary River in the Sunshine Coast hinterland the previous Sunday. The man’s body was found just after 10.30am on Thursday, near Cooks Road at Conondale.
On 10 February, the Insurance Council of Australia (ICA) declared the storms and associated flooding a catastrophe, enabling claims to be processed quickly. On 28 May 2020, the ICA reported that 96,594 claims for homes and businesses damaged by the storms had been lodged in south-east QLD and eastern New South Wales, with estimated combined insurance losses of $896 million. Most claims were for property damage caused by storm runoff, flooding, strong winds and heavy rain.
Joint Commonwealth-State disaster recovery funding was made available for counter disaster operations and the restoration of essential public assets in the QLD LGAs of Brisbane City, Gold Coast, Goondiwindi, Logan, Scenic Rim, Somerset, South Burnett, Southern Downs, Toowoomba and Western Downs following the February rainfall and floods.