Europe could face a significant Arctic cold spell in early December, potentially putting further pressure on the continent’s already low natural gas reserves. Signs of an unusually early disruption of the polar vortex have appeared in weather models, raising concerns that Arctic air could reach parts of north-western Europe in the coming weeks.
The European Centre for Medium-Range Weather Forecasts (ECMWF) has indicated a possible disruption of the polar vortex, a large circulation of cold air high above the Arctic. Such changes can influence weather patterns further south, potentially allowing colder air to move towards North America and parts of Europe. OilPrice reports that the development could bring Arctic conditions to north-western Europe within weeks.
However, the potential impact on gas supplies is particularly concerning because Europe is entering the colder season with relatively low storage levels.
One week of extreme cold could use up Europe’s gas buffer
An analysis by BloombergNEF suggests that even a single week of unusually cold weather could significantly increase Europe’s heating demand.
The researchers examined a scenario in which average temperatures between 2 and 8 December were 5°C below the average for the same period over the previous ten years. Under these conditions, heating-related natural gas demand across north-western Europe, Italy, Spain and Austria would increase by approximately 1.1 billion cubic metres.
If all of this additional demand had to be met from underground storage, European gas reserves could fall to around 15.5% of capacity by the end of March, compared with approximately 17% under average weather conditions.
That would leave inventories only about half a percentage point above BloombergNEF’s estimated minimum level before Europe would need to start using gas held as strategic reserves rather than normal commercial stocks.
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Europe enters winter with its lowest reserves since 2022
The situation is made more difficult by the fact that European gas storage facilities are currently around 74% full, their lowest seasonal level since the 2022 energy crisis.
October’s relatively mild weather did provide some relief. Lower heating demand allowed countries to continue filling their storage facilities later than usual, leaving inventories approximately 1 billion cubic metres above the October average for the 2021–2025 period. However, a serious cold spell could quickly erase that additional buffer.
The International Energy Agency (IEA) also warned this week that European gas storage levels could fall below 10% by the end of March. It said the market would become particularly vulnerable to further cold spells, technical failures or other supply disruptions.
One important factor is that gas withdrawal rates tend to decline when storage facilities fall below 30% of their working capacity. This means that extracting gas could become more difficult precisely when demand is high and reserves are running low.
European gas prices remain far above US levels
The continent also faces a significant price disadvantage compared with the United States. European natural gas futures are currently trading at roughly 11 times the US price, according to the figures cited by OilPrice.
Another major cold spell could therefore put further upward pressure on European wholesale gas prices, potentially keeping energy costs elevated well into spring.
For households and businesses, the eventual impact will depend on the severity and duration of the winter weather, as well as the availability of alternative supplies. While an Arctic cold spell in early December is not yet certain, Europe’s limited storage buffer leaves the continent more exposed to any unexpected increase in demand or disruption to supply.
