Drier air and slightly cooler temperatures are now being felt along the Gulf Coast following the passage of a weak cold front yesterday morning. Expect temperatures to stay cooler under clear skies as high pressure settles into the region.
Now through Thursday morning, overnight low temperatures will drop into the low to mid 60s along and north of I-12. South of Lake Pontchartrain, temperatures will be in the upper 60s to low 70s. Daily high temperatures will remain slightly below average for this time of the year, topping out in the mid 80s.
Rain chances will stay very low through the rest of the week, but humidity will start to increase on Friday as moisture begins flowing in from the Gulf of Mexico. By the weekend, temperatures will return to the upper 80s, but it will feel more like the low 90s.
In the tropics, the National Hurricane Center has now classified Tropical Depression Severn in the open waters with 35 mile per hour wind speeds. This is likely to remain weak in intensity given dry air surrounding the system. As it approaches the Leeward Islands late this week into early next, it enters an environment less favorable for development. Right now, Seven appears to weaken before approaching the United States if not heading out to sea. Regardless, I am not concerned about a local impact for New Orleans.