Simplified ice chart and reference charts

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

Previous ice map

FINNISH ICE REPORT 17.12.2017

New ice has formed in the Bay of Bothnia.

In the northern Bay of Bothnia there is thin fast ice in the inner archipelago. Off the fast ice there is thin close ice and new ice to Kemi2 and Oulu2.

In the northern Lake Saimaa there is new ice and ice formation.

Icebreakers: Meteor and Iso-Pukki assist in the northern Lake Saimaa.

Restrictions to navigation: Minimum ice class and deadweight required of assisted vessels:
Siilinjärvi, Puhos and Joensuu, I and II of more than 2000 tons.

Alterations to the restrictions: Minimum ice class and deadweight required of assisted vessels from 19th December:
Tornio and Kemi, I and II of more than 2000 tons.
From 20th December:
Oulu, Varkaus and Kuopio, I and II of more than 2000 tons.

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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