Rain is expected to develop on Monday afternoon and last through Tuesday morning, with heavier and more persistent rainfall in areas exposed to brisk east-southeasterly winds. Around 15-30 mm of rain is forecasted for the warning area, increasing to 50-60 mm in the Mournes. To prepare for potential flooding, check if your property is at risk and consider creating a flood plan and assembling an emergency flood kit. Stay updated on road conditions and public transport schedules to avoid delays, and gather essential items such as torches, batteries, and a mobile phone power pack to cope with potential power cuts. Be aware that weather warnings may change rapidly, and it is recommended to regularly check the weather forecast for your area.