33 Revisiting the 1993 Extreme Precipitation in Central Nepal: Synoptic Feature and Numerical Simulation Binod Pokharel 1, 2 , Kalpana Hamal 3, 4 , Lin Zhao 2 , Deepak Aryal 1 , Dharmendra P. Rajbhandari 5 , Suresh Marahatta 1, 6 , and Shankar Sharma 1, * 1 Central Department of Hydrology and Meteorology, Tribhuvan University, Kirtipur Kathmandu, Nepal 2 Utah Climate Center, Department of Plants, Soils, and Climate, Utah State University, Logan, UT, USA 3 International Centre for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, P.O. Box 9804, Beiing 100029, China 4 University of Chinese Academy of Sciences, Beiing 100049, China 5 Department of Meteorology, Tri-Chandra Campus, Tribhuvan University, Kathmandu, Nepal 6 RECHAM Consult Pvt. Ltd., Putalisadak, Kathmandu, Nepal Abstract: The cloudburst event occurred on 19- 20 July 1993, created a devastating fash food over south-central Nepal. The storm killed hundreds of people, and damaged millions of dollars of properties. This study focused on the synoptic and thermodynamics that triggered the cloudburst in central Nepal, bringing 540 mm of rainfall over a small region in less than 24 hours. Moreover, it investigates the primary reason for the particular extremest event in Nepal. Our results show the strong upward motion transported the signifcant moisture that led to favorable condition for development of thick cloud cover, producing a record- breaking precipitation during that event over central Nepal. Likewise, the monsoon trough with negative sea level pressure anomaly over central Nepal located east of the upper-level trough further suggests a westward tilt with Cite this paper: Pokharel, B., Hamal, K. ., Zhao, L., Aryal, D. ., Rajbhandari, D. P. ., Marahata, S. ., & Sharma, S. Revisiting the 1993 Extreme Precipitation in Central Nepal: Synoptic Feature and Numerical Simulation. Jalawaayu, 2(1), 33–44. htps://doi.org/10.3126/jalawaayu.v2i1.45392 Journal home page: htps://cdhmtu.edu.np/journal/index.php/jalawaayu hnjfo' JALAWAAYU Type of paper: Original Article (Interdisciplinary Journal of Atmospheric and Hydrospheric Sciences) ARTICLE INFO Received: 18 February 2022 Received in Revised form: 07 March 2022 Accepted: 14 April 2022 Available Online: 31 May 2022 Keywords Extreme precipitation WRF Nepal Simulations *Correspondence Shankar Sharma E-mail: sharma.sh969@gmail.com