Heavy torrential downpours throughout the afternoon will cause heavy flooding in parts of county Armagh this evening.
The Met Office have issued a yellow weather warning across Northern Ireland, with county Armagh particularly affected.
Heavy rain and thunder storms are forecast from 1pm, right through until 10pm tonight.
The warning also applies to counties Antrim, Tyrone, Armagh, Derry/Londonderry and Down.
“Showers or rain is expected to develop through today,” said the Met Office spokesperson.
“These becoming potentially heavy, prolonged and thundery by this afternoon.
“Locally torrential downpours are possible with 10 to 20 mm falling locally in an hour and as much as 30 to 40 mm in several hours.
“The thundery rain will clear from the west through the first half of the night.”
For more information visit the Met Office website.