Recent satellite images indicate that the area of low pressure located about 250 miles northeast of Bermuda, being referred to as Invest 90L, is well-defined and is gradually acquiring subtropical characteristics.
In addition, earlier satellite-derived wind data revealed that the system is producing gale-force winds. The associated shower and thunderstorm activity has increased slightly over the past several hours.
If that trend continues, it would result in advisories being initiated on the system later tonight or Saturday morning while it moves slowly westward to west-southwestward to the northeast of Bermuda.
The low is forecast to move northeastward into a more hostile environment by Saturday night or Sunday and the systems development chances diminish after that time.
* Formation chance through 48 hours…high…90 percent
* Formation chance through 5 days…high…90 percentGulf of Mexico:
A well-defined low pressure area, which is being referred to as Invest 91L, is located over the western Gulf of Mexico about 150 miles east-southeast of Corpus Christi, Texas.
Earlier satellite wind data and buoy observations indicated that the system is producing winds of 30-35 mph near and to the east of its center but recent satellite and radar imagery shows that shower and thunderstorm activity remains limited.
Although environmental conditions are not particularly favorable for significant development, only a slight increase in thunderstorm activity could result in the formation of a tropical depression or storm before the system moves inland along the Texas coast overnight.
Regardless of development, the system could produce heavy rainfall over portions of southeastern Texas and southwestern Louisiana through Saturday. Given the complete saturation of soils with ongoing river flooding along the Texas and Louisiana coastal areas, heavy rain could lead to flash, urban, and additional riverine flooding across this region.
* Formation chance through 48 hours…medium…50 percent
* Formation chance through 5 days…medium…50 percent