Sydney, Brisbane in firing line for thunderstorms as temperatures plunge

Key points

• The Bureau of Meteorology has warned Sydney and Brisbane could face their most significant storm activity on Tuesday. Widespread thunderstorms are likely across New South Wales and Queensland on Monday and Tuesday, before a cold snap sends temperatures sharply lower.
• Sydney is forecast to reach 33C on Monday but only 20C later in the week. Senior meteorologist David Crock has warned severe storms could develop around Alice Springs, bringing damaging winds.
• Melbourne could drop to 14C on Wednesday, with the risk of late-season frost in southern areas.