There are delays on First Transpennine Express between Newcastle and Durham due to lightning damage to the signalling. Train services running through this station may be cancelled or delayed.
Also, there are delays of up to 15 minutes on CrossCountry between Newcastle and Durham. Services running through this station may be cancelled or delayed.
Virgin Trains East Coast have also been affected.
There are delays on Virgin Trains East Coast at Newcastle due to lightning damage to the signalling. Virgin Trains say services running through this station may be cancelled or delayed.
Heavy, thundery showers will turn locally torrential with the risk of hail this afternoon and evening.
Whilst most places will miss the worst, please be aware of the risk of localised flooding.
The warning stays in place until 9pm tonight.
As much as 50mm of rain could fall in just a few hours.
Isolated heavy, and possibly severe thunderstorms are expected to develop late Wednesday afternoon across parts of Northern England and Southern Scotland.
Some torrential downpours are possible leading to localised surface water flooding, with hail and frequent lightning also possible hazards.
Visit the Met Office Warning page here