Climate Prediction Center weekly sea ice prediction
27 Apr 2025 to 07 Jun 2025
(Updated: Thu May 1 15:25:22 UTC 2025)
This page displays Climate Prediction Center (CPC) experimental sea ice forecasts for the next six weeks.
The forecasts are initialized from CPC sea ice initialization system (CSIS) and produced with Unified Forecast
System (UFS) based on FV3 atmospheric component, GFDL MOM6 oceanic component and CICE6 sea ice component.
The forecast ensemble includes 16 members. Mean bias correction is made based on the average differences between
retrospecitve forecasts and observations for 2012-2022. Sea ice extent (SIE) is the area sum of grid boxes where sea ice
concentration is greater than 15%. Sea ice melt date (IMD) for each grid box is determined as the first
day of the first 15 day period of sea ice concentration below 15% after 1 April. Sea ice freeze date (IFD)
is determined by working backwards from the last day of the forecast and finding the first 15 day period of
sea ice concentration below 15% and defining IFD as the day after this period. Forecast data can be downloaded
here.
Sea ice extent
Pan-Arctic
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Sea ice concentration
| Regions |
Week 1 |
Week 2 |
Week 3 |
Week 4 |
Week 5 |
Week 6 |
| Northern Hemisphere |
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| Pacific Sector |
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Sea ice melt date (IMD)/ice freeze date (IFD)
Melt date
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