The present study deals with the simulation of dry convective squall line occurred on 4 April 2021 over Bangladesh using WRF model. The model is run in a triple nested domain at 15, 3, and 1 km horizontal resolution for 78 h from 1800 UTC, 02 April to 0000 UTC, 05 April 2021. According to the model results, the temperature at 2 m height is found higher than 40 C and rainfall is found 24 mm in the study region. The model simulated relative humidity is found to be 30–40% in the lower level, and it is rather higher (80–90%) in the higher level between 700 and 300 hPa. The estimated precipitable water vapor (PWV) shows much lower (10–30 kg/m2) than the climatology (25–33 kg/m2). Due to low PWV and high atmospheric temperature the amount of rainfall is low. The squall line moved towards the east under the influence of a strong upper-tropospheric westerly trough which is prominent at 300 hPa. To the east of the squall line, there exists a weak anticyclonic circulation in the lower troposphere, which causes some resistance to the eastward motion of the squall line. Boro rice are found to have high vapor pressure deficit in the order of 50–60%, which coupled with high temperature and strong winds of convective storms cause accelerated evapotranspiration affecting spikelet of the plants. This stress condition severely affects the grain formation.