Based on the unconventional observation data, such as wind profile data, microwave radiometer data, and VDRAS 5km resolution data, a comparison analysis is conducted on the application of multisource observation data in forecasting of a heavy rainstorm in July 2016 The results indicate that the wind profiles provided highly similar data with the VDRAS vertical wind field in the upperlevel trough and surface cyclone precipitation periods of the weather process. Measurements from the microradiometer highly fitted those from the VDRAS observations, indicating the observational data from both instruments are credible. The fluctuation of the wind field at the edge of the wind profile layer was a good indicator for the timing prediction of highintensity rainfall during the warm area before the front and upperlevel trough precipitation processes. The lowlevel jet was directly related with the time period of surface cyclone precipitation. The rapid increase of the specific humidity was a good indication for correcting the shortduration and nowcasting precipitation.