Suthin Channgam said the storms hit Ban Thung Luang, Ban Mae Moot, Ban Sobwin and Ban Huaypong villages over a roughly 20-minute period.
Thana Nualplod, an official of the Chiang Mai Disaster Prevention and Mitigation Office, said the office had undertaken a survey and found that 2,301 families in 18 districts of Chiang Mai had been affected by earlier storms in the province on May 4 and 5.
Two people were killed in the storms during the two-day period, he added.