Meteorological authorities have issued a warning for heavy thunderstorms expected across 17 provinces this Saturday. The alert, which forecasts rainfall amounts exceeding 15 mm locally, is effective from 1:00 PM until 9:00 PM. The affected regions include Algiers, Boumerdès, Tizi Ouzou, Blida, Médéa, Bouira, Sétif, Mila, Bordj Bou Arreridj, Constantine, Guelma, Souk Ahras, Batna, Oum El Bouaghi, Tébessa, Khenchela, and Illizi.