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Maguire: Europe's clean energy woes are worsened by a lack of snow cover

The below-average snowfall in continental Europe during the winter of 2018-19 has deprived regional utilities in this region of a vital source of clean energy that can be dispatched this spring. This is on top of an alarming drop in wind power generation in 2025.

According to LSEG the snow-fed hydro production in the Alps has fallen by over a third compared to last year's same dates. This is due to a decrease in winter precipitation.

Ember data shows that the lower hydro supply follows a period of low wind production lasting several months, which forced European utilities (utilities) to increase their fossil fuel generation by 7% compared to last year's levels.

The continued weakness of hydro means that regional utilities will need to increase output from coal and natural gas-fired power stations, which are Europe's main sources of energy. Nuclear reactors can also be sent on demand.

The Peak Has Been Passed

The output of snow-fed hydro assets peaks in the spring and early-summer, when temperatures rise and melt snow to refill reservoirs and boost run-of river turbine system output.

LSEG's seasonal snow-fed hydromodel data suggests that the output of the Alps as a region peaked at the end of March and will continue to decline steadily until the late summer, before recovering during the fall and the winter.

The peak hydro output in the Alps area was around 30% lower than the long-term norm, and nearly 40% less compared to the same period of 2024. This is due to the thin snow cover in key areas during this winter.

The cumulative snow-fed production of Austria's major regions fell by 44% from 2024 to the present.

LSEG data indicates that Switzerland, France, Italy, and the entire Danube Catchment Area are all expected to see output declines of 30 or more percent.

KNOCK OUT IMPACTS

According to Ember, by 2024, Europe will generate around 18% the electricity it needs.

This is compared to 23% for gas-fired power plants, 20% for nuclear plants and 13% each from wind farms and coal plant.

Solar farms produced around 7%, bioenergy plants about 3% and other renewables and fossil plants another 3%.

Europe's utilities have become accustomed to the volatile output of hydro assets and are adept at replacing lost hydro production with higher production from assets other than hydro.

The European power companies are now facing a tight supply of clean energy this year, due to the fact that Europe's wind farms have already recorded a decline of more than 10% in wind electricity production during the first quarter 2025 compared to the same quarter 2024.

Several systems, including France, have a large number of nuclear reactors to ensure that overall electricity flows are clean, even when wind and hydro production is low.

In order to compensate for the loss of wind and hydro, most other European networks have increased fossil fuel generation.

In Europe, the production of electricity from gas fired power plants increased by 26% in the first three month of 2025 compared to the same period in 2024. Coal-fired power generation increased by 15%.

Gas production in Austria increased by 75% between January and March 2024 compared to the same period in 2024, as utilities sought to balance the system during the recent hydro slump.

In Germany, France, and Italy, fossil fuel generation is also up this year compared to last year, partly due to the reduction in hydropower supplies.

SOLAR OFFSET?

Solar farms in Europe are on course to break previous records by 2025. They will also be able offset at least some of the reduced supply from other assets.

Solar farms cannot replace hydro power in full because they can only produce solar energy when the sun shines.

It's possible that utilities who could dispatch bursts during peak demand may have to rely on fossil fuels rather than solar farms in order to replace the lost supply, especially at times when solar output is low.

It is true that the European power grids are adding more battery storage capacity, which allows utilities to store solar energy and then sell it to their customers later.

Batteries can also be used to limit fossil fuel use and the increase in emissions from the power sector.

With wind and hydro power under pressure, Europe's energy firms will continue to rely heavily on fossil fuels, which could result in a rise in fossil-fueled generation by 2024.

These are the opinions of the author who is a market analyst at.

(source: Reuters)