Thunderstorms can lead to locally strong wind gusts. Locally heavy rain showers. Danger of damage to object(s) as a result of lightning strikes. The power supply and TV / internet may be affected.
Stay up to date on the development of the weather and the weather forecast. Monitor the weather radar or lyn.met.no. Disconnect electrical appliances. Seek shelter. Avoid open plains and large trees. Do not swim or bathe.
Thursday evening and early Friday morning expected locally much lightning due to rain showers. First in Agder and Telemark, and later moving northeast.