Met Office issues warning for rain, thunder, lightning hitting Northamptonshire on Friday afternoon
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Experts predict showers will develop widely during the afternoon, some being heavy with scattered thunderstorms.
The heavy rainfall could bring a chance of some flooding and disruption, with those affected urged to take care when travelling.
A spokesman said: “Frequent lightning is also possible in a few places, along with hail.There is a good chance driving conditions will be affected by spray and standing water.
“Flooding of a few homes and businesses is possible, potentially leading to some damage to buildings or structures
“Perhaps damage to a few buildings and structures from lightning strikes, with short-term loss of power and other services possible.”
The warning is in force until 7pm with 15-20 mm of rain possible in an hour in places, although one or two spots might see 30-50 mm in around three hours.