Maximum vapor content existed at 700hPa level, and the vapor came from south or ease-south below 700hPa level and from west-south above 700hPa level.

• 水汽含量最大值区位于700hPa附近，700hPa以下水汽通常来自南、东南方向，700hPa以上主要受西南气流影响。