Group 1 - The core viewpoint of the articles discusses the unusual weather patterns in Hangzhou, with a return to high temperatures after a brief cool period, indicating a shift back to summer conditions [1] - The meteorological explanation for the recent weather includes an abnormal position of the subtropical high pressure, which has not been controlling Hangzhou, resulting in lower than expected temperatures [1] - A forecast predicts that high temperatures will peak around 37-38°C in Hangzhou, but the subtropical high pressure is not strong enough to maintain these temperatures for an extended period [1] Group 2 - The upcoming weather forecast includes three days of afternoon thunderstorms or rain from Thursday to Saturday, with temperatures dropping to around 31°C by Friday [2] - From Sunday, a southeast airflow is expected to bring cooler air and increased cloud cover, maintaining maximum temperatures around 33°C [2] - The forecast also mentions the potential formation of two typhoons, which may impact Hangzhou with rain and cooling effects [2]