Forecasters have warned parts of Britain will be lashed with up to 90mm of rain and winds could reach speeds of up to 70mph. One weather chart shows Wales and the west of England on track to be hit with gusts of wind of more than 70mph tomorrow. The harrowing conditions are expected to descend on the UK over a 36-hour weather window.
Holidaymakers across the UK have been warned to expect an “unseasonably wet and windy spell”.
Those including campers staying by the coast have been told to prepare for the worst.
The warning follows a similar period of unseasonable weather towards the end of last week, coinciding with the arrival of Storm Ellen.
A chart by WX Charts shows Francis making its way across the Atlantic.
Predictions for Tuesday show the storm arriving in Wales, the Midlands and parts of northern England.
The purple colour coding of the chart suggests winds of over 70mph will sweep through parts of the country.
Meteorologist Nicola Maxey of the Met Office said: “Since 2015 when we started naming storms, we have never had to name a storm in August – and now we’ve had two in a few days.
READ MORE: UK flood MAP: Is YOUR area at risk? 12 warnings issued ahead of storm
The yellow warning is in place from midnight on Monday until 6am on Wednesday.
Forecasters said “some communities may be cut off by flooded roads” and “delays or cancellations to train and bus services are possible”.
Another yellow rain warning for the same time period is in place for parts of north Wales, the Midlands and the North.
The Met Office said flooding of homes is likely as is “some interruption to power supplies”.
A wind warning is in place from 9am on Tuesday to 9am on Wednesday.
The area covers the Midlands, Wales and all of southern England.
Power cuts are expected and people have been warned to steer clear of seafronts as “injuries and danger to life could occur from large waves”.
There is also the possibility of people being injured from flying debris, meteorologists said.
Storm Ellen resulted in the deaths of 15-year-old Nicola Williams who was swept to her death in the Rhymney River in Llanrumney, Cardiff, and a 50-year-old holidaymaker who died in the sea near Helston, west Cornwall, after getting into difficulties.