A yellow warning for thunderstorms has been issued for Wednesday by the Department of Meteorology, valid from 11.00am until 5.00pm local time. Isolated thunderstorms with a chance of hail are expected, with precipitation rates exceeding 35 millimeters per hour. Rain and isolated thunderstorms will initially affect mainly the west and north, gradually moving to other parts. Temperatures will reach up to 20C in the interior and on the north coasts, 21C on the south-east and east coasts, 19C on the remaining coasts, and 9C in the higher mountains. Winds will be south- to north-westerly, light to moderate up to 4 Beaufort, and locally strong to very strong, up to 6 Beaufort. The sea will be rough. Overnight, isolated showers are expected on the west and south coasts, with thin fog forming inland. Temperatures will drop to 9C in the interior and on the northern coasts, 12C on the west coast, 11C on the remaining coasts, and 3C in the higher mountains, where frost is expected. Winds will be mainly south- to north-westerly, light to moderate, up to 4 Beaufort. The sea will turn slightly rough to calm. Thursday and Friday will see afternoon rains mainly in the northeast, the mountains, and inland, with similar weather forecast into the weekend, including a chance of a brief storm in the mountains and the southeast. Temperatures are expected to gradually drop to slightly below average for the season.