Heavy rain and all modes of severe weather will be possible starting Friday, and with periods of rain continuing into early next week, flooding may be a major issue as well.
Large amounts of deep moisture will start streaming through Mississippi Thursday night and a series of upper level disturbances may trigger multiple rain/storm events starting Friday. Friday and Saturday, models predict that the atmosphere will be unstable. As a result, convective storms that meet a severe threshold are possible.
This means that tornadoes, strong winds, large hail, heavy rain, and frequent lightning are on the table.
Starting Sunday an approaching boundary may stall over south Mississippi. If this happens, we may see rain Sunday, Monday, and Tuesday as well.