The Naval Air Station/Joint Reserve base in Belle Chasse, Louisiana is located approximately 15 miles south of the city of New Orleans. The terrain over the entire area is largely marshy delta land cut by numerous bayous, canals and drainage ditches. The base is virtually surrounded by water. The climate of the area in a large part is influenced by the close proximity of the many water surfaces, especially the Gulf of Mexico. Throughout the year, these waters modify the relative humidity and temperature conditions, decreasing the range between extremes. During the summer season, prevailing winds carry inland warm moist air favorable for sporadic, often localized, precipitation.
The base exists in a primary tropical cyclone belt. Consequently, the base’s weather is periodically influenced by tropical waves and tropical cyclones from June through November.
Climatologically, summer begins with the month of May and extends through September. The highest temperatures are normally reached in July and August. May and September are also "hot" months, and there is little variation in the weather regime from day to day or week to week.
The winter season is traditionally November trough February. Little in the way of actually cold weather is experienced before December 15. This season is not usually marked by any prolonged periods of cold weather, but rather by short spans of two to three days. The weather fluctuates between warm and cold, clear and cloudy, and wet and dry, as a wide variety of synoptic systems of various intensities move in and out of the area. Normally, winter temperatures are sufficiently mild as to cause little or no interference with outdoor activities.
Violent thunderstorms sometimes move through the area, in connection with cold fronts and squall lines, during the winter season. These frontal systems occasionally produce severe thunderstorms and tornadoes. Waterspouts are occasionally observed during these periods. The pattern of spring precipitation is similar to the winter, while autumn precipitation tends to be distributed in much the same manner as the summer showers. July, August and September have the highest mean precipitation.
The spring months of March through April and autumn months of October through November are transitional periods. They offer some variety in the weather pattern, as modified Polar Air Masses move in and out of Southern Louisiana. Daytime temperatures are mild and nights are cool. These four months are by far the most pleasant months of the year, with the exception of days with strong to severe thunderstorms.