By Tuesday morning the front should be over Southwest Louisiana and this will be when rain and storms are most likely to occur. Unfortunately the front is likely to stall somewhere in our area, but this poses a great forecasting challenge because any areas that the front moves through could see a drop in humidity and possibly temperatures too. However some areas may stay warm and humid the entire time if the front does not move far enough south. For sure the best chance of any drop in humidity will occur Tuesday night into Wednesday and will be more likely in areas north of I-10. Areas south of I-10 could see a slight drop in humidity levels, but areas right along the coast are least likely to see any significant change. The front is not likely to move much through Friday, but upper level disturbances will move overhead and these could spark showers and storms.
Wednesday will likely be the day least likely to see rain thanks to somewhat drier air above our region. By Thursday moisture will return to the atmosphere above us and this will cause some scattered showers and storms to form. The front will lift back north on Friday and this will likely cause more widespread rain and thunderstorms and these will be likely again on Saturday.
Way out in the Atlantic Ocean we are watching a tropical wave which is likely to become a tropical storm over the next few days. The next name on the list is Bertha. This wave is several days away from reaching land in the Lesser Antilles and is a long way away from Southwest Louisiana. The long range computer models currently call for this to eventually turn to the north well east of the United States. Remember that August and September are the most active months of hurricane season, so make sure you have a plan in place should something threaten Southwest Louisiana.