The formation and development conditions of the cloud streets over the yellow sea by the Cold Surge of Siberian Anticyclone Expansion which produce the heavy snowfall events over the southwestern coast, Honam District of the Korean peninsula, has been investigated through analyses of the three dimensional snow cloud structures by using the CAPPI, RHI, VAD and VVP data of X-band Radar at Muan Weather Observatory and S-band Radar at Jindo Weather Station. The data to be used are obtained from January 04, 2003, when heavy snow storm hits on Gwangju and Honam District.
The PPI Radar images show that the cloud bands distribute in perpendicular to the expansion direction of the high pressure and that the radius of cloud cells is about 5∼8km with 20∼30dBz and distance between each cell is about 10km. And but the vertical Radar images show that the cloud street is a small scale convective type cloud within height of about 3km where a stable layer exists. From the VVP images, the time period of the high pressure expansion, the moving direction and development stages of the system are delineated. Finally, the vertical distribution of wind direction is fairly constants, while the wind speed sheer increases with altitude to 3km.

Abstract
 1. 서 론
 2. 자료 및 방법
  2.1. 자료
  2.2. 분석방법
 3. 종관 분석
 4. 위성영상과 레이더영상 분석
  4.1. 위성영상분석
  4.2. PPI 분석
  4.3. RHI 분석
  4.4. CAPPI 분석
  4.5. 레이더 VAD와 VVP 분석
 5. 결 론
 참고문헌

• 신기창(기상청) | Ki-Chang Shin (Korea Meteorological Administration)
• 류찬수(조선대학교 대기과학과) | Chan-Su Ryu (Department of Atmospheric Science, Chosun University) Corresponding Author