A cold air mass will move in over the whole country tonight. Sunday's highs will be 7 to 12 degrees, and 11 to 13 on the Black Sea coast, the National Institute of Meteorology and Hydrology (NIMH) said. Rain in the southeast will ease and stop in places.

Most of Bulgaria will have a cloudy night, and the wind will die down. Temperatures will fall to between 0 and 5 degrees, and to about 1 in Sofia. Fog and poor visibility will form in places after midnight, mostly on the Danube plain and in enclosed valleys and fields.

The fog will lift by about noon on Sunday and visibility will improve. Clouds will break up and thin out for a while, then build again from the west. A moderate wind will blow from the east-southeast. Sofia's high will be about 8 degrees.

Cloud over the Black Sea coast will be broken, with more over the south coast and in the afternoon. The wind along the coast will be moderate and easterly, and the sea will be 2 to 3 on the scale. Sea water is 13 to 14 degrees off the north coast and 15 to 16 off the south coast.

It will be cloudy in the mountains. The wind will be moderate from the south-southwest at lower levels, and strong from the west on the ridges for a time. At 1,200 metres above sea level the temperature will be around 7 degrees, and at 2,000 metres around 3.

Air pressure is above the average for the month. It will fall during the day but stay above average.

There will be showers in places in western Bulgaria on the night to Monday. On Monday, cloud will be mostly thick, with fog on the plains, and the wind will be light from the south-southwest or die down completely.

On 12 November we wrote that the Black Sea coast could see up to 21 degrees, with a cold front and rain coming on Saturday. The sea water was then 15 degrees, and the waves were 2 to 3 on the scale.

On the night to Tuesday it will rain in many places, with the rain moving from west to east, while the wind turns to the west-northwest and strengthens. On Tuesday morning the rain will stop quickly, the clouds will briefly break up and the wind will weaken. In the western half of Bulgaria it will turn southwest again. NIMH says it will get warmer.