Storm Ulla creates big waves in the Gulf of Finland. The waves are larger than before. The device measures 4.1-meter-high waves. Such waves have not been seen since 1980.
The previous big wave was in 2007. Then the wave was 3.7 meters. Strong wind creates big waves. The wind was 27.1 meters per second. This happened in the Gulf of Finland.
Big waves come with strong winds. The wind must blow for a long time. If the wind blows for a long time, big waves form.
The wind was strongest in Vaindloo. There, the wind was 30.0 m/s. In the eastern part of the Gulf of Finland, the waves may be even larger. There are no devices to measure the waves there.
At night, the waves are about 130 meters long. Large ships stopped. The waves may be larger than expected. Sailors must be careful.
Even 0.5-meter waves are dangerous for small boats. If the forecast shows 0.3 meters, do not go to sea. The waves may be larger.
At night, it is harder to sail at sea. The driver of a small boat must be careful.