Thunderstorm warning issued for NI today

Author: Emma DicksonPublished 19th Aug 2026

Heavy showers and thunderstorms are on the way today according to the Met Office, who have just issued a yellow weather warning.

It will remain in place until 11.59pm tonight, with travel disruption and flash flooding in some places.

A statement from the Met Office warns: "A band of heavy showers is expected to spread across Northern Ireland from west to east late morning and early afternoon, with further slow-moving heavy showers or thunderstorms developing later.

"Within these showers, 15-20 mm of rain is likely in an hour or less, with a few places probably seeing 25-30 mm in a couple of hours. While rain will be the primary hazard, hail and lightning are also likely in places."

What to expect:

⚠️There is a good chance driving conditions will be affected by spray, standing water and/or hail, leading to longer journey times by car and bus

⚠️Some flooding of a few homes and businesses likely, leading to some damage to buildings or structures

⚠️Probably some damage to a few buildings and structures from lightning strikes

⚠️Delays to train services are possible

⚠️Some short-term loss of power and other services is likely

Northern Ireland's five-day forecast:

Today: A dry start in south and east, but occasionally heavy showers in north and west spreading across most areas, with the chance of thunder, showers may become slow to move away. Maximum temperature 18 °C.

Tonight: Heavier showers dying out through the evening but some continuing through the night, perhaps drier in the south, feeling cooler with freshening northeasterly winds. Minimum temperature 9 °C.

Thursday: Quite breezy and feeling fresher with some showers, these mostly light and moving away quite briskly. Maximum temperature 17 °C.

Outlook for Friday to Sunday: Remaining on the cool side but a lot of bright weather for the weekend with occasional showers, perhaps cloudier on Sunday.

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