Warm winds from the southeast are behind the expected temperature increase. Härenstam explains the heat by a counter-clockwise rotating low pressure system over the Atlantic, which interacts with a clockwise rotating high pressure system over Russia.
Then we get warm air from far south, she says.
Härenstam emphasizes that there is still too much time to give an exact forecast for which day will be the warmest, or how long the heat will last.
Between Tuesday and Friday there may be a few days with temperatures reaching almost 20 degrees. But it could be anything from one day to three days.
Corrected: In an earlier version, meteorologist Emma Härenstam was given the wrong first name.
