A surface low, currently situated over the northwestern Gulf of Mexico, will continue to move northeastward through today and tomorrow. This feature will move across the southeastern Louisiana coast and Mississippi on Tuesday. Meanwhile, an upper-level low is moving across the area, which is locally enhancing atmospheric lift. These features, added with high atmospheric moisture, will keep scattered storms in the forecast, with the threat for locally heavy rainfall and flooding. Flood watches are in effect until Monday night across much of the area, especially across Acadiana.
Most models agree that an additional 2-3 inches of rain could be possible through Tuesday night, but locally higher amounts could be possible. The main hazard we don't want to see is a convergence zone, that can sometimes develop near or just behind these lows. These usually cause narrow strips of rain and storms that train over some of the same areas. Our best bet, in terms of not seeing flooding, will be for storms to remain scattered in nature.
The sun finally returns as we head through Wednesday, with temperatures climbing back into the middle 80s. With a dry northerly wind, overnight lows could push into the low 60s Thursday and Friday morning, which will feel quite nice. Heat and humidity looks to return by for the latter parts of the week and for the weekend.
~Meteorologist Trevor Sonnier