Showers just the beginning of more rain to come

UPDATE 2PM: MORE than 6mm of rain fell in less than three hours in Ipswich this morning but there could be more coming.

Forecasters expect today's wet weather is going to develop into an unseasonable thunderstorm.

The mean rainfall in Ipswich in May is 31.6mm which normally falls across four days.

Only 0.2mm fell in Boonah today, 6.8mm in Springfield and 5.2mm in Gatton.

INITIAL: THIS morning's early morning shower is just the beginning of what forecasters expect is going to develop into an unseasonable thunderstorm.

Just over 3mm fell on the city since last night but the Bureau of Meteorology is expecting more showers and a possible thunderstorm later this afternoon and evening.

BOM forecaster Harry Clark said Tuesday would be 'very showery'

"There is still high chance of showers but not as much by Wednesday. By the time Thursday comes it's going to be mostly sunny going into the weekend," he said.

"There is a whole lot of moisture coming from the coast and an upper trough is providing extra oomph. A lot of cool air in the atmosphere is helping to produce more rain.

Tomorrow will clear to partly cloudy conditions with only the slight chance of a shower before the rain clears completely in time for the weekend.

Temperatures will peak at 24C today, slightly under the May average, before increasing to 29C on Wednesday and Thursday.

Friday and the weekend will be slightly cooler, dropping off to day time maximums of 25C, 22C on Saturday and 23C on Sunday.

Saturday and Sunday are expected to be 'the first real taste of winter' with overnight temperatures dropping as low as 5C on Saturday and 6C on Sunday and day time maximums only reaching 22C and 24C.

The chilly overnight temperatures are well below the mean minimum average of 11C.

Mr Clark said a surge of dry south-westerly air would clear out any moisture in the air and allow heat to escape quickly at night.

"It's like taking the blanket off and clearing any cloud," he said.

"Once the dry air floats through, there will be maximums of 22 on Saturday and 24 on Sunday. It's not unusual but up until this point, it has been quite a warm start to May.

"It will be the first taste of winter, dropping down to 5C on Saturday and Sunday."