Severe wind conditions that swept across northern Slovenia caused disruptions to parts of the electricity system and temporarily forced two international transmission lines with Croatia out of service, although domestic supply remained stable thanks to sufficient backup network capacity.
The extreme weather, with gusts reaching up to 150 km/h, led Slovenia’s Environment Agency to issue a red weather warning on 26 March for the northern part of the country. The warning remained in effect through 27 March as strong winds continued to create operational challenges across the system.
In addition to impacts on the distribution network, two key interconnection lines between Slovenia and Croatia were taken offline: the 400 kV Divača–Melina line and the 220 kV Podlog–Žerjavinec connection. These outages highlighted the vulnerability of cross-border infrastructure during extreme weather events.
According to Slovenia’s transmission system operator ELES, no damage was detected on the Slovenian side of the network. However, Croatian crews identified a fault on the line toward Melina. Repair work could not be carried out immediately due to dangerous weather conditions, but the outage did not affect electricity supply thanks to alternative transmission routes.
The Podlog–Žerjavinec line was successfully restored on 27 March around midday, while the Divača–Melina connection returned to service on 28 March after the fault on the Croatian side was resolved. Despite temporary disruptions and increased operational strain, the overall transmission system remained stable, preventing any wider supply interruptions for consumers.
