Thursday:
The weather in Iceland is predicted to change significantly and unusually suddenly today with a sharp drop in temperatures and frost in most parts of the country in the afternoon. According to long-term forecasts, Iceland might be in for a white Christmas.
Frost is forecast throughout this week and on Thursday and Friday a storm from the north is expected to hit the country, followed by snowfall in the north, [Morgunbladid] reports.

Friday:
A forceful storm and blizzard hit southeast Iceland last night with winds reaching up to 30 meters per second in Höfn. In the Sudursveit rural district power line poles snapped, causing a blackout in a large area.
The area will remain powerless for some time as the weather doesn’t permit repairs.
There is a risk of jet streams in many locations around the country, such as below Mt. Hafnarfjall near Borgarnes and on the southern Snaefellsnes peninsula in the west and below the Eyjafjöll mountain range in the south.
Disturbances to domestic flights are to be expected and people are asked not to travel between regions by car. Travel by sea is also not recommended, as the storm is raging offshore.
Very few ships are out; only some larger ones. Trawlers have sought shelter inside fjords in the east and a transport vessel en route to Neskaupstadur is waiting for the weather to clear southeast of Stokksnes peninsula, unable to sail in any direction.
Scattered sea ice is approaching the country northeast of Horn, the northernmost point of the Westfjords peninsula.

"Lost my hat today in the wind!! It blew right off my head and into the darkness. :-( If anyone sees one of these blowing around the west end of Reykjavík - it's mine!" - Miss Alda Kalda from 101 Reykjavík, on facebook today.