Hailstones, flash flooding and gusts of wind travelling up to 50mph are forecast to batter the North East this weekend.
The Met Office has put out a yellow weather warning for the entire region tomorrow and says it will keep that in place for the East coast throughout Sunday, too.
While temperatures will stay warm at around 20C, storm clouds gathering over the continent are expected to unleash chaos in the early hours of tomorrow when they reach Tyneside.
Weather experts are urging motorists to take care as surface water flooding could cause traffic problems.
Nicola Maxey, spokeswoman for the Met Office, said: “There will be heavy rainfall, thunder and lightning, hailstones and strong winds.
“Coming from the continent, these storms move up through the South and West Midlands and into the North East, although the track of the storm is uncertain.
“At the moment, it looks like it is going to track through until the mid-morning.”
Although temperatures look warm on Sunday, with 22C forecast for Durham city and 21C in Newcastle, a yellow weather warning remains in place down the East coast with 19C forecast for Ashington.
Mark Spowage, from the AA, is warning drivers to beware surface water.
He said: “Changing conditions on Saturday will bring torrential thundery showers in places.
“While they are likely to be short-lived, water will quickly run off causing localised flash flooding as well as making the roads pretty slippery. Keep your speed down and don’t risk driving through flood water.”
The Royal Life Saving Society UK (RLSS UK), the drowning prevention charity, has also warned that open water can be unpredictable.
It comes as the six weeks summer holidays kick off and a prolonged period of high temperatures is expected.
It comes after Washington teens Chloe Fowler and Tonibeth Purvis lost their lives in the tidal River Wear at Fatfield last year.
RLSS UK’s Director of Lifesaving, Adrian Lole, said: “Last year saw a tragic amount of preventable deaths as people flocked to open water sites not suitable for swimming. These sites included rivers, quarries, lakes and reservoirs – all of which have many dangers including very cold water, currents, obstacles and uneven depths. They look so inviting but can be deadly.
“Being aware of the basic principles of open water safety, combined with knowledge and understanding of the hazards, can increase enjoyment and significantly reduce the number deaths each year.
“Any drowning is a tragedy but the number of people who lost their lives last year was not only extremely sad but extremely worrying.”
As temperatures are expected to remain high but flash flooding is expected the charity has warned people to be safe.
Adrian added: “We want people to enjoy water, but safely and sensibly – using their common sense and listening to advice. Do not be tempted to cool off in open water, we do not want another summer of tragedy.”