A yellow weather warning comes into force at midnight and will remain in place until 9 a.m. on Tuesday, the Meteorology Department has announced.
A frontal system is expected to affect the island from tonight, bringing a change in conditions and, mainly from after midnight, local showers and isolated thunderstorms. Hail is also possible in some storms.
The thunderstorms are expected to affect first the northern and western coasts and then progressively move towards the southern and eastern areas. Hail may occur and winds will shift and strengthen during storms. Rainfall intensity is likely to range between 35 and 55 millimetres per hour.
Today’s forecast
This afternoon, the weather will be partly cloudy and at times mostly cloudy, with isolated showers or a brief thunderstorm expected mainly over the mountains and in the north.
Winds in the west and northwest of the island will blow north-westerly, moderate to strong, force 4 to 5 Beaufort, while in the rest of the areas they will be mainly north-easterly to south-easterly, light to moderate, force 3 to 4 Beaufort.
The sea will be slightly rough in the south and east, but slightly rough to rough in the west and north.
Tonight: storms spreading to most areas
Tonight, local showers and isolated thunderstorms are expected, initially in the west and north and gradually in the rest of the island. Hail may fall during thunderstorms.
Winds will blow mainly north-westerly, moderate, around force 4 Beaufort, and temporarily strong, 4 to 5 Beaufort, along the coasts. In storms, winds may shift and strengthen further.
The sea in the west, southwest and north will be slightly rough to rough, while in the southeast and east it will be generally slight to slightly rough.
Temperatures will drop to around 14°C inland, around 15°C on the coasts and about 7°C in the highest mountains.
Tomorrow: cooler, unsettled and windy
On Tuesday, the weather will be mostly cloudy at times, with local showers and isolated thunderstorms. In the morning these will be more likely in the east and north, while from midday onwards they are expected mainly over the mountains, in the south and east and possibly in some inland areas. Hail may again occur in storms.
Winds will blow mainly south-westerly to north-westerly, moderate to strong, force 4 to 5 Beaufort, and temporarily strong, force 5 Beaufort, on windward coasts.
The sea will be slight to slightly rough in the east, but slightly rough to rough on the rest of the coasts.
Temperatures will drop noticeably, reaching around 21°C inland, about 22°C on the coasts and around 11°C in the highest mountainous areas.