本文針對1998年6月4-5日，發生在華南/南海北部的組織性中尺度對流系統，利用NCAR/PSU MM5模式，探討此一地區MCSs的演變及結構。此個案最顯著的外部特徵為伴隨梅雨鋒面的南側，沿著20∘N呈東—西方向排列了三個組織完整的MCS，每個MCS之間相距約400公里。經由模擬的結果顯示，模式大體上能夠掌握諸如鋒面、風切線、槽線及低層噴流（LLJ）等綜觀尺度的系統特徵。對於三個MCS（分別以MCS A、B及C來標示）的模擬上，其中除MCS B的模擬結果生命期較觀測為短，且降水強度稍弱外，其他與觀測結果相近。
模式15公里網格之模擬的結果顯示，MCS A在具有暖濕、氣旋式風切、合流及風速輻合的環境下初始。夜間中南半島陸風的增強，更加強了離岸風在MCS A處之風速輻合的效果。初始前，盛行西南風越過狹長的安南山脈形成背風波。由背風擾動所造成一連串垂直運動中的上升氣流，將850 hPa高相當位溫區的潛在不穩定氣層舉升，是激發MCS A初始前對流活動的重要機制。位於MCS A南方及西南方的底層暖平流，在成長期階段是重要的對流活動強迫項。另外，850 hPa風切線南方的綜觀尺度LLJ在成長期到成熟期階段顯著增強，透過LLJ所帶來的豐沛暖濕空氣，使得位於LLJ左前方的MCS A獲得較強的水汽及質量輻合，產生更強的上升運動。
MCS B形成於華南低層相當位溫脊線附近及風切線南側，伴隨大尺度鋒區之輻合帶並具潛在不穩定的大氣環境內。激發MCS B的強迫機制，包括了：1.此區內的合流及局部風速輻合之效應；2.由熱力因素激發之前一降水系統外流邊界和MCS B初始前降水蒸發冷卻所造成之冷池對氣流的強迫抬升；3.地形對氣流的強迫抬升作用等因素。發展過程中由水汽凝結潛熱釋放所誘發出來的中尺度低壓（低層）及中尺度高壓（高層）也是維持MCS繼續發展的有利條件。而次綜觀環境中底層冷平流的出現，則為模式中MCS B迅速消散的重要因素。
MCS C初始於呂宋島西北方海面上，同樣位於具有850 hPa高相當位溫區，屬於潛在不穩定的環境。低層強西南氣流下風處的風速輻合、合流效應及暖平流，是MCS C初始的可能舉升機制。且在MCS C發展過程中，其中的風速輻合及合流效應幾乎均有伴隨。消散期階段，位於巴士海峽附近的850 hPa相當位溫脊線明顯減弱，MCS C的降水強度亦隨之迅速減弱。

Chen, C.K., 1979: An analysisof the relationship between the low level jet stream and the heavy rainfall during the Mei-Yu season in Taiwan. Atmos. Sci., 6, 1, 29-37. (in Chinense with English abstract).
Chen, C.S., 1990: A numerical study of the terrain effects on a sqall line. Terrestrial Atmos. Oceanic Sci., 1, 73-90.
Chen, G.T.J., 1977: A synoptic case study on mean structure of Mei-Yu in Taiwan. Atmos. Sci., 4, 38-47.
Chen, G.T.J., 1978: The structure of a subtropical Mei-Yu system in Southeast Asia. Sci. Rep., Dept. of Atmos. Sci. Natl. Taiwan Univ., 2, 9-23.
Chen, G.T.J., 1983: Observational aspects of Mei-Yu phenomena in subtropical China. J. Meteor. Soc. Japan, 61, 306-312.
Chen, G.T.J., 1990: Study of rainfalls and radar echoes in the heavy rainfall events accompanied by mesolow in Mei-Yu season. Atmos. Sci., 18, 213-228 in Chinense with English abstract).
Chen. G.T.J., C.C. Yu, 1990: Role of Mei-Yu front and mesolow on the heavy rainfall events: Two cases in TAMEX phase I (1986). Atmos. Sci., 18, 129-147 (in Chinense with English abstract).
Chen. G.T.J., C.W. Wu and S.S. Chi, 1986: Climatological aspects of the mesoscale convective systems over subtropical China and the western North Pacific during Mei-Yu season of 1981-1983. Atmos. Sci., 13, 33-45(in Chinense with English abstract).
Chen. G.T.J. and H.C. Chou, 1989: Squall lines observed during TAMEX. Proc. Workshop on TAMEX Preliminary Scientific Results, Taipei , 22-30 June, 35-42.[Available from the Dept. of Atmos. Sci., Natl. Taiwan Univ. Taipei, Taiwan, R.O.C.]
Chen. G.T.J. and T.Y. Wu, 1985: Pilot study of “A Severe Regional Precipitation Observation and Analysis Experiment”. Natl. Sci. Counc., Sci. and Tech. Of Disaster Prevention Program, 108 pp(in Chinese with English abstract).
Chen, G.T.J. and J.S. Yang, 1988: On the spatial and temporal patterns of heavy rainfall in Taiwan Mei-Yu season. Atmos. Sci., 16, 151-162(in Chinese with English abstract).
Chen, S.J., Y.H. Kuo, W. Wang, Z.Y. Tao, and B. Cui, 1998: A modeling case study of heavy rainstorms along the Mei-Yu front. Mon. Wea. Rew.,126,2330-2351.
Chen, Q.-S., 1982: The instability of the gravity-inertia wave and its relation to low-level jet and heavy rainfall. J. Meteor.Soc. Japan, 60, 1041-1057.
Chen, Y.L. and N.B.F. Hui, 1990: Analysis of a shallow front during Taiwan Area Mesoscale Experiment. Mon. Wea. Rev., 118, 2649-2667.
Chi, S.S. and G.T.J. Chen, 1988: A diagnostic case study of the environmental conditions associated with mesoscale convective complexes: 27-28 May 1981 Case. Atmos. Sci., 16, 14-30 (in Chinese with English abstract).
Chi, S.S. and G.T.J. Chen, 1989a: Case study of the MCSs and rainfall during TAMEX/Phase I. Atmo. Sci., 17, 59-75 (in Chinese with English abstract).
Chi, S.S. and G.T.J. Chen, 1989b: A moisture budget analysis of two MCC cases during Taiwan Mei-Yu season. Papers Meteor. Res., 12, 143-157.
Chiou, T.K., and Y.H. Kuo, 1988: Analysis and simulation of the subsynoptic-scale enviroment of a mesoscale convective system over southeastern China. Paper Meteor. Res., 34, No. 1,
Ding, Y.-H., 1992: Summer monsoon rainfalls in China. J. Meteor. Soc. Japan, 70,337-396.
Dudhia, J., 1989: Numerical study of convection observed during the winter monsoon experiment using a mesoscale two-dimension model. J. Atmos. Sci., 46, 3077-3107.
Fang, Z.-Y., 1985: Preliminary study of medium-scale cloud cluster over Changjang basin in summer. Adv. Atmos. Sci., 2, 334-340.
Grell, G. A., J. Dudhia, and D. R. Stauffer, 1995: A description if the fifth generation Penn State/NCAR mesoscale model（MM5）. NCAR Tech Note NCAR/TN-398+STR, 122 pp.
Hong, S.-Y., and H.-L. Pan, 1996: Nonlocal boundary layer vertical diffusion in a medium-range forecast model. Mon. Wea. Rev., 124, 2322-2339.
Kain, J. S., and J. M. Fritsch, 1993: Convective parameterization for mesoscale models: The Kain-Fritsch scheme. The Representation of Cumulus Convection in Numerical Models, Meteor. Monger., No. 46, Amer. Meteor. Soc., 165-177.
Lin, Y.L., 1989: A study of flow over a mesoscale mountain with diabatic heating. Proc. Workshop on TAMEX Preliminary Scientific Results, Taipei, 22-30 June, 327-333.
Maddox, R. A., 1983: Large-scale meteorological conditions associated with midlatitude, mesoscale convective complexes. Mon. Wea. Rev., 111, 1475-1493.
Nuss, and Titley, 1994: Use of multiquadric interpolation for meteorological objective analysis. Mon. Wea. Rev., 122, 1611-1631.
Parsons, D.B., S.B.. Trier and J.B. Klemp, 1989: Numerical simulations of frontal updrafts observed in subtropical and middle latitudes. Proc. Workshop on TAMEX Preliminary Scientific Results, Taipei, 22-30 June, 6-13. [Available from the Dept. of Atmos. Sci., Natl. Taiwan Univ. Taipei, Taiwan, R.O.C.]
Trier, S.B., D.B. Parsons and T.J. Matejka, 1990: Observations of a subtropical cold front in a region of complex terrain. Mon. Wea. Rev., 118, 2449-2470.
Tsay, C.Y. and G.T.J. Chen, 1980: Dynamic processes for vertical motion in a Mei-Yu system. Papers. Meteor. Res., 3, 67-77.
Wu, CW. And G.T.J. Chen, 1988: Composite structure of environmental conditions associated with MCCs in Taiwan Mei-Yu season. Proc. Conference on Weather Analysis and Forecasting, Central Weather Bureau, Taipei, 95-106(in Chinese whith English abstract).
Xiang, X., M. Lan, and D. Wang, 1993: The mesoscale analysis of the Mei-Yu front cloud system in 1991（in Chinese）. Quart. J. Appl. Meteor., 4, 288-292.
林芳如，2001：1998年梅雨期豪雨實驗IOP 5之數值模擬。台灣大學大氣科學所碩士論文。
林得恩，1999：梅雨季中尺度對流系統與低層噴流之數值模擬。台灣大學大氣科學所碩士論文。
張慶紅，1999：台灣海峽上空中尺度對流系統的數值研究，北京大學地球物理系氣象學系博士論文。
楊國祥，何其強，陸漢城，1997：中尺度氣象學。明文書局，77-95。
陳泰然，1991：台灣梅雨季之中尺度現象研究（一）。台大大氣科學研究所研究報告NTUATM-1991-001，136頁。
陳受鈞，1999：梅雨鋒上的中尺度對流系統。海峽兩岸災變天氣學術研討會，台北，111-114。
丘台光，1999：1998年梅雨期豪雨實驗之作業。海峽兩岸災變天氣學術研討會，台北，75-83。