关键词: 强对流天气, 雷达特征, 加密站资料, 中尺度特征

Abstract: Using the conventional meteorological observation, Xining Doppler radar, automatic station, NCAR1°×1°, reanalysis data for use, a strong convective weather was analysised in the northeast of Qinghai province, on the morning of August 18, 2016. The results showed that the southwest of subtropical high and cold air eastward southward in the northeast of Qinghai province intersection was the main cause of the convective weather; Radar echo was accompanied by persistent bow echo, mesocyclone, the strongest echo up to 65 dBz at the top, above 17 km, VIL was 30~40 kg/m², which was the typical feature of supercell; There are discontinuities in air pressure, temperature and relative humidity. When heavy precipitation occurs, there is a rise in pressure, a sudden rise in relative humidity, and a sudden drop in temperature. The pressure and humidity changed in the same phase, contrary to the temperature change phase, strong precipitation occurred in the vicinity of the convergence line.

Key words: strong convective weather, radar characteristics, data from encrypted stations, mesoscale features