An 11-year-old boy was airlifted to hospital after colliding with a car while on a bike.
A doctor and a paramedic were flown to the scene where the boy was treated for serious head injuries.
He was airlifted to the Royal Victoria Infirmary in Newcastle, where his condition on arrival was critical.
A 49-year-old man has been arrested in connection with the incident.
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Listen to Ian Stewart's call to police to report Helen Bailey missing after he dragged the author into a cesspit last year.
Storm Doris is set to bring wet, windy and wintry weather to the region.
Severe weather warnings have been put in place for much of the UK on Thursday,with the North urged to "be prepared".