On August NUMBER@1 , while located near the northwestern LOCATION@1 , a substantial increase in convection resulted in the upper-level low building downwards to the middle levels of the troposphere , coinciding with the development of an upper level anticyclone .

On August NUMBER@1 , while located near the northwestern LOCATION@1 , an increase in convection made the upper-level low building downwards to the middle levels of the troposphere , which caused the development of an upper level anticyclone .
