The MET Service is forecasting showers tomorrow into Wednesday.
It has issued a Yellow Level Adverse Weather Alert, which will be active from 11am on Tuesday to 8pm on Wednesday.
It says there is a medium chance (65%) chance of intense showers and/or thunderstorms developing by late morning on Tuesday, and a high chance (80%) during predawn hours of Wednesday.
It says this activity will be intermittent, with some settled periods.
However, in the event of heavy downpours, street/flash flooding and gusty winds can be expected.
The possibility of landslides/landslips is also heightened during the period.