A giant rainstorm appears to be heading for the UK from the Atlantic Ocean, and it's expected to make landfall by Thursday morning, according to the latest weather maps.

The low-pressure system was forecast to first reach the Republic of Ireland in the early hours of Thursday morning. Shortly after, small portions of rainfall was forecast in Wales and the Southwest, reaching no more than 1mm of rain per hour.

But by 6pm, most of the UK would've had large downpours, according to WXCharts. The regions forecast to have the most rain were Wales, the Northwest, and the Southwest, with up to 10mm per hour likely.

The storm was expected to pass over the UK entirely by about 9pm on Thursday. There could still be smatterings of snow in Scotland throughout the day and into the night, however. About 3cm of snow per hour could fall around Inverness at its peak.
A low-pressure system was forecast to arrive from the Atlantic Ocean (
Image:
WXCharts)

The Met Office has also issued a yellow weather warning for rain, starting from midnight tonight, through to 3pm on Thursday afternoon. It warned there could be a maximum of 80mm of rain per hour over the highest altitudes.

The yellow warning for rain included most of Cornwall and Devon, South Wales, as well as parts of East and West Scotland. The Met Office said: "Rain is expected to arrive during Wednesday evening and then turn persistent and heavier overnight and into Thursday. Before the rain eases and clears during Thursday afternoon, 20-40mm of rain is likely to fall widely with peaks of 50-80mm over hills. The rain will be accompanied by strong south to southeasterly winds."

It urged everyone included within the weather warnings to check whether they were at risk of flooding, and to create an emergency flood kit if necessary. "Give yourself the best chance of avoiding delays by checking road conditions if driving, or bus and train timetables, amending your travel plans if necessary," it added.

Meanwhile, the Environment Agency warned that flooding was "probable" in the Northeast and in Yorkshire this week. There could also be flooding in the Midlands and the south coast on Thursday.