Simplified ice chart and reference charts

Normal situation Previous ice map Ice map of the previous year Icebreakers

Ice map of the previous year

FINNISH ICE REPORT 23.01.2018

The ice drifts south and new ice is forming.

In the northern Bay of Bothnia there is 20-40 cm thick fast ice in the archipelago. Farther out 20-30 cm thick ridged very close ice to Kemi 2. At the ice edge there is a brash ice barrier, difficult to force. Farther out new ice and after that 5-10 cm thick level ice and thin close ice.

In the southern Bay of Bothnia there is 10-25 cm thick fast ice in the archipelago. Farther out 20-30 nautical miles thin close ice and new ice.

In the Quark there is new ice and thin close ice from Sydostbrotten to northeast of Nordvalen. In Vaasa archipelago there is 10–25 cm thick fast ice, farther out thin close ice.

In the Sea of Bothnia 5-15 cm thick fast ice in the inner archipelago. Farther out new ice and ice formation.

In the Gulf of Finland thin ice in the inner archipelago. Farther out new ice to the line Tiiskeri - Sommers.

Icebreakers: Kontio and Otso assist in the Bay of Bothnia.

Restrictions to navigation: Minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi and Oulu, IA or IB of more than 2000 tons.
Raahe, Kalajoki, Kokkola, Pietarsaari and Vaasa, I or II of more than 2000 tons.

Alterations to the restrictions: Minimum ice class and deadweight required of assisted vessels from 27th January:
Raahe, Kalajoki, Kokkola, Pietarsaari and Vaasa, IA or IB of more than 2000 tons and IC or II of more than 3000 tons.
Kaskinen, Loviisa, Kotka and Hamina, I or II of more than 2000 tons.

Vessels bound for Gulf of Bothnia ports in which traffic restrictions apply shall, when passing the latitude 60°00'N, report their nationality, name, port of destination, ETA and speed to ICE INFO on VHF channel 78. This report can also be given directly by phone +46 31 699 100.

Vessels bound for ports in the Bay of Bothnia shall report to Bothnia VTS on VHF channel 67 20 NM before Nordvalen lighthouse.

About the charts

The ice chart of the whole Baltic Sea (pdf) is published in the autumn twice a week (Monday and Thursday) and daily when the amount of ice increases until until ice break-up in spring. It represents current ice situation, ice breaker positions and traffic restrictions in the Baltic Sea.

The simplified charts are updated once a week at the latest on Tuesday morning. The first one represents measured level ice thicknesses, ice coverage and sea surface temperature. The reference charts represent average, 1965 – 1986, ice situation on that day (= normaali), last week´s situation, last year´s situation and the positions of the ice breakers.

Explanation of chart's finnish words

  • jäätä: ice
  • haurasta: rotten ice

 

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