Simplified ice chart and reference charts

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

Previous ice map

FINNISH ICE REPORT 17.02.2018

New ice is forming and the ice gets thicker.

In the northern Bay of Bothnia there is 35-55 cm thick fast ice in the archipelago. At the fast ice edge there is 30-50 cm thick ridged consolidated drift ice to Kemi 2 and Oulu 4. Farther out 15-30 cm thick rafted ice. The ice field is difficult to force in places and ice pressure occurs. From Marjaniemi southward runs a wide lead with thin ice.

In the southern Bay of Bothnia there is 20-35 cm thick fast ice and very close ice in the archipelago. Farther out a 15-25 nautical miles wide lead with thin ice. Farther west 15-30 cm thick very close ice.

In the Quark 10-30 cm thick very open ice and new ice. In Vaasa archipelago there is 20–40 cm thick fast ice and 10-20 cm thick rafted ice to Ensten. Farther out thin ice.

In the Sea of Bothnia 10-30 cm thick fast ice in the inner archipelago. Off the fast ice edge thin drift ice.

In the Archipelago Sea thin level ice and new ice in the inner archipelago.

In the western Gulf of Finland 5-15 cm thick ice in the inner archipelago. Farther out thin very close drift ice to 2 nautical miles south of Harmaja.

In the eastern Gulf of Finland 15-25 cm thick fast ice in the archipelago. Off the fast ice 5-15 cm thick very close ice and shuga to the line Porvoo lighthouse - Tiiskeri - Haapasaari. Farther out new ice and ice formation.

Icebreakers: Kontio, Otso, Polaris and Urho assist in the Bay of Bothnia. Thetis assists in the Quark and in the Sea of Bothnia. Voima assists in the eastern Gulf of Finland.

Restrictions to navigation: Minimum ice class and deadweight required of assisted vessels:
Tornio, Kemi and Oulu, IA of more than 4000 tons.
Raahe, Kalajoki, Kokkola and Pietarsaari, IA of more than 2000 tons.
Vaasa, IA or IB of more than 2000 tons and IC or II of more than 3000 tons.
Kaskinen, Kristiinankaupunki, Pori, Rauma, Uusikaupunki, Taalintehdas, Förby, Koverhar, Inkoo, Kantvik, Helsinki and Sköldvik, I or II of more than 2000 tons.
Loviisa, Kotka and Hamina, IA or IB of more than 2000 tons and IC or II of more than 3000 tons.

Alterations to the restrictions: Minimum ice class and deadweight required of assisted vessels from 21st February:
Sköldvik, IA or IB of more than 2000 tons and IC or II of more than 3000 tons.
Loviisa, Kotka and Hamina, IA or IB 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.

The traffic separation schemes in the Quark are temporarily out of use.

The transit traffic west of Holmoarna is temporarily prohibited.

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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