A very strong upper ridge develops a monster high-pressure system over the North Atlantic – near 1055 mbar in its center on Sunday

Contrary to the much above normal activity of North Atlantic troughs and extremely deep surface cyclones over the past few months, the NAO index flips into strongly negative these days. This means the mean sea-level pressure is higher over the North Atlantic than it is further south, usually over the Azores. This weekend, a very … Continue reading A very strong upper ridge develops a monster high-pressure system over the North Atlantic – near 1055 mbar in its center on Sunday