Rain is making a brief appearance in Queensland. Fog shrouded Brisbane and surrounding districts this morning. Both Amberley and Toowoomba had visibility reduced to less than 50m. Brisbane Airport saw fog reduce visibility to 50m before first light arrived this morning. For most locations the fog cleared before sunrise, although Toowoomba still was experiencing thick foggy conditions at 7am. Today turned out to be a stunner, with many parts of the state enjoying a warmer-than-average May day. For most places it was the warmest in at least a week, for some it was two weeks. At Injune, daytime temperatures were seven degrees above average for May. Throughout the Central West, daytime temperatures were five degrees above the May average. A low pressure trough will begin to push through the southern parts if the state today. On Thursday, this trough will strengthen under the influence of an upper-level trough. Rain and potentially rumbles of thunder are expected from the eastern parts of the Channel Country extending to the coast throughout the day. Heavier falls are most likely through the Maranoa and Warrego and Darling Downs and Granite Belt on Thursday, with up to 25mm. Other than the torrential rain that fell at the very start of the month for eastern districts, conditions have been reasonably dry under a persistent belt of high pressure for the remainder of the month. By early Friday, a pool of cold air will have made its way over the state. Overnight temperatures are likely to be four-to-six degrees cooler than the previous morning for southern and central districts. A high pressure ridge will rapidly rebuild bringing a return to the aptly named 'Sunshine State' for at least a week.