By using the realtime data from wind profile radars and the Lband sounding system, the characteristics of vertical wind profile during persistent heavy fog processes at Urumqi airport from 2014 to 2016 were analyzed. The results are as follows: (1) There were four upper air circulation patterns during persistent heavy fog processes at Urumqi airport, including frontridge pattern, ridge pattern, westerly wind fluctuation pattern and horizontal trough pattern. (2) The major forms of vertical wind profile were identified as TypeⅠ(WNW wind layer and boundary layer wind field) and TypeⅡ (WNW wind layer, SE wind layer and boundary layer wind field). (3) The bottom of the WNW wind layer was lowest under the circumstances of frontridge and horizontal trough pattern. The SE wind layer was thickest under the circumstances of westerly wind fluctuation pattern. (4) The evolution of the vertical wind field had a time advance of 1-2 h, and the regularity played a certain role in the prediction of persistent heavy fog weather.

The multi-factor integrated correlation probability method and the multi-parameter dot pitch line method are used to analyze 160 hailstorm cases occurred in the plain region of Ningxia in flood season from 2003 to 2008. The quantitative comprehensive forecast index of severe convection weather in the plain region of Ningxia discriminated by Doppler Radar was found. The result shows that the success rate of identification of hail, heavy rain and other severe convective weather could reach to 87.1% while the comprehensive forecast index reaches 2.8

 Using the new generation weather radar(CINRAD) data including echo intensity, velocity, composite reflectivity, hail index profile, storm tracing information, VIL and meso-cyclone 12 severe cnnvective weather events nccnrred  in 2003 and 2004 in Ningxia were studied. According to image characteristics, radial velocity products were classified as 3 types, and  were analyzed respectively form meso-scale   SynOptlC  pTlnClple.  RPSL11tS  S110W  that  the  pTOdL1CtS  Of  CINRAD  are  L1Sefl11  t0  fnreeaSt  SPVPTe  COriVPCt1Ve  eVentS,eSpeC1811y hall. 1VIeanWhlle, the COmpaTlSOn analySlS  WaS g1Ven 8150 hetWPen CINRAD and TOlltlne  Weather radar In th1S paper.

 A 2 day’、continuous severe thunderstorm occurred in most areas of Ningxia on June 14th and 15th, 2004, part of the ye110W  RlVer  1TTlgatlOn TeglOn haS heen StrLICl} by hall.  By LISlng the TOlltlne meteOTOlOg1Ca1 data and dOppleT radar pT0(1LICtS and  SO On,a meteorological analysis of this process has been done, the analysis shows that: this is a typical continuous severe thunderstorm pro-CCSS In  N1ngXla Wh1Ch TCSlllted fTOm the TOtatlOnal eaStWa.T(1S and  SOLIthWa.T(1S  MOngOha Cold  VOrteX.  Frnm  the radar eC110  dlffeTenCe  he-tWCen  general  thLIndeTStOTm  and  SCVCTe  thLIndeTStOTm  Wlth  hall,  the  mOnltOTlng  and  fOTCCa.Stlng  1ndeX  Of  N1ngXla  SCVCTe  COriVCCtlOn
weather has been gained with statistics. By using the forecasting products of Ningxia meso一、tale model MMS, a simulative analysis
has been done on it's related physical quantities, which has gained a valuable results.